SCHEDULE 14A
                                 (Rule 14a-101)
                     INFORMATION REQUIRED IN PROXY STATEMENT
                            SCHEDULE 14A INFORMATION
                Proxy Statement pursuant to Section 14(a) of the
                         Securities Exchange Act of 1934

Filed by the Registrant  |X|
Filed by a Party other than the Registrant  |_|

Check the appropriate box:

|_|   Preliminary Proxy Statement
|_|   Confidential, for Use of the Commission Only (as permitted by
      Rule 14a-6(e)(2))
|X|   Definitive Proxy Statement
|_|   Definitive Additional Materials
|_|   Soliciting Material Under Rule 14a-12

                            SIGA TECHNOLOGIES, INC.
                (Name of Registrant as Specified in Its Charter)

    ------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

|X|   No fee required

|_|   Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11

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            pursuant to Exchange Act Rule 0-11 (set forth the amount on which
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|_|   Fee paid previously with preliminary materials.

|_|   Check box if any part of the fee is offset as  provided  by  Exchange  Act
      Rule  0-11(a)(2)  and identify the filing for which the offsetting fee was
      paid  previously.  Identify the previous filing by registration  statement
      number, or the Form or Schedule and the date of its filing.

      (1)   Amount Previously Paid:

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                             SIGA Technologies, Inc.
                         420 Lexington Avenue, Suite 408
                            New York, New York 10170
                                 (212) 672-9100

May 2, 2005

Dear Stockholder:

      You are cordially  invited to attend the Annual Meeting of Stockholders of
SIGA  Technologies,  Inc.  which  will be held at the  offices  of Kramer  Levin
Naftalis & Frankel LLP, 1177 Avenue of the Americas,  29 th Floor, New York, New
York 10036 at 10:30 a.m.  (local  time) on Thursday,  May 26,  2005,  and at any
adjournment or  postponement  thereof.  On the following pages you will find the
formal notice of annual meeting and proxy statement.

      To assure that you are represented at the Annual  Meeting,  whether or not
you plan to attend the meeting in person, please read carefully the accompanying
proxy  statement,  which  describes  the  matters to be voted  upon,  and please
complete, date, sign and return the enclosed proxy card promptly.

      I hope that you will attend the  meeting and I look  forward to seeing you
there.

                                                Sincerely,


                                                /s/ Donald G. Drapkin
                                                ---------------------------
                                                DONALD G. DRAPKIN
                                                Chairman of the Board



                             SIGA Technologies, Inc.
                         420 Lexington Avenue, Suite 408
                            New York, New York 10170

                    NOTICE OF ANNUAL MEETING OF STOCKHOLDERS
                           TO BE HELD ON MAY 26, 2005

      NOTICE IS HEREBY  GIVEN  that the  Annual  Meeting  of  Stockholders  (the
"Annual Meeting") of SIGA Technologies,  Inc., a Delaware corporation  ("SIGA"),
will be held on  Thursday,  May 26, 2005,  at 10:30 a.m.  (local  time),  at the
offices of Kramer  Levin  Naftalis & Frankel LLP,  1177 Avenue of the  Americas,
29th Floor, New York, New York 10036, and at any adjournment.

      At the Annual Meeting,  SIGA's stockholders will be voting on proposals to
do the following:

      1.    To elect ten directors to the Board of Directors of SIGA;

      2.    To  ratify  the  appointment  of  PricewaterhouseCoopers  LLP as the
            independent registered public accounting firm of SIGA for the fiscal
            year ending December 31, 2005;

      3.    To  approve an  amendment  to the SIGA  amended  and  restated  1996
            Incentive  and  Non-Qualified  Stock  Option  Plan (the  "Plan")  to
            increase the maximum number of shares of common stock  available for
            issuance under the plan from 10,000,000 to 11,000,000; and

      4.    To  transact  such other  business as may  properly  come before the
            Annual Meeting or at any adjournment or postponement thereof.

      Stockholders  of  record  at the  close of  business  on April 1, 2005 are
entitled to notice of, and to vote at, the Annual Meeting or any  adjournment or
postponement  thereof.  A list of such  stockholders  will be  available  at the
Annual Meeting and for any purpose related to the Annual Meeting, during the ten
days prior to the Annual Meeting,  at SIGA's office,  during  ordinary  business
hours.

      All  stockholders are cordially  invited to attend the Annual Meeting.  If
you do not expect to be present at the Annual Meeting, you are requested to fill
in,  date and sign the  enclosed  proxy  and mail it  promptly  in the  enclosed
envelope to make sure that your shares are represented at the Annual Meeting. In
the event you  decide to attend the Annual  Meeting in person,  you may,  if you
desire, revoke your proxy and vote your shares in person.

                             YOUR VOTE IS IMPORTANT

   IF YOU ARE UNABLE TO BE PRESENT PERSONALLY, PLEASE MARK, SIGN AND DATE THE
 ENCLOSED PROXY, WHICH IS BEING SOLICITED BY THE BOARD OF DIRECTORS, AND RETURN
                     IT PROMPTLY IN THE ENCLOSED ENVELOPE.

                                  By Order of the Board of Directors,


                                  /s/ Thomas N. Konatich
                                  ------------------------------
                                  Thomas N. Konatich
                                  Secretary
New York, New York
May 2, 2005



                             SIGA Technologies, Inc.
                         420 Lexington Avenue, Suite 408
                            New York, New York 10170

                                 --------------

                                 PROXY STATEMENT
                         ANNUAL MEETING OF STOCKHOLDERS
                                  MAY 26, 2005

                                 --------------

      This proxy statement is furnished to  stockholders  of SIGA  Technologies,
Inc.   ("SIGA")  in  connection  with  the  solicitation  of  proxies,   in  the
accompanying  form, by the Board of Directors of SIGA (the "Board of Directors")
for use in voting at the Annual Meeting of Stockholders  (the "Annual  Meeting")
to be held at the offices of Kramer Levin Naftalis & Frankel LLP, 1177 Avenue of
the Americas,  29th Floor, New York, New York 10036, on Thursday,  May 26, 2005,
at 10:30 a.m., and at any adjournment or postponement thereof.

      This proxy statement,  and the accompanying form of proxy, are first being
mailed to stockholders on or about May 2, 2005.

                    VOTING RIGHTS AND SOLICITATION OF PROXIES

Purpose of the Annual Meeting

      The  specific  proposals  to be  considered  and acted  upon at the Annual
Meeting  are  summarized  in  the  accompanying  Notice  of  Annual  Meeting  of
Stockholders. Each proposal is described in more detail in this proxy statement.

Record Date and Outstanding Shares

      The Board of Directors has fixed the close of business on April 1, 2005 as
the record  date (the  "Record  Date")  for the  determination  of  stockholders
entitled to notice of, and to vote at, the Annual Meeting.  Only stockholders of
record at the close of  business  on the Record Date will be entitled to vote at
the Annual Meeting or any and all adjournments or postponements  thereof.  As of
the Record Date,  SIGA had issued and  outstanding  24,500,648  shares of common
stock, par value $.0001 per share ("Common Stock"),  and 68,038 shares of Series
A convertible  preferred  stock, par value $.0001 per share ("Series A Preferred
Stock"). The Common Stock and the Series A Preferred Stock together comprise all
of SIGA's issued and outstanding voting stock.

Voting at the Annual Meeting

      Each  share of Common  Stock and each  share of Series A  Preferred  Stock
outstanding  on the  Record  Date will be  entitled  to one vote on each  matter
submitted to a vote of the  stockholders.  Cumulative  voting by stockholders is
not permitted.

      The presence,  in person or by proxy,  of the holders of a majority of the
votes  entitled  to be cast by the  stockholders  entitled to vote at the Annual
Meeting is necessary to constitute a quorum.  Abstentions and broker "non-votes"
are  counted as present  and  entitled to vote for  purposes  of  determining  a
quorum.  A  broker  "non-vote"  occurs  when  a  nominee  holding  shares  for a
beneficial owner does not vote on a particular proposal because the nominee does
not  have  discretionary  voting  power  for  that  particular  item and has not
received instructions from the beneficial owner.

      For the election of directors,  a plurality of the votes cast is required.
Abstentions  and broker  "non-votes"  are not  considered for the purpose of the
election of directors.


                                       1


      For the ratification of the appointment of  PricewaterhouseCoopers  LLP as
the independent  registered  public  accounting firm of SIGA for the fiscal year
ending December 31, 2005, the affirmative  vote of a majority of the total votes
cast on such  proposal in person or by proxy at the Annual  Meeting is required.
Abstentions and broker  "non-votes" for such proposal are not considered to have
been voted on the proposal.

      For the  approval of an amendment to the SIGA Plan to increase the maximum
number of shares of Common  Stock  available  for  issuance  under the Plan from
10,000,000  shares to 11,000,000  shares,  the affirmative vote of a majority of
the total  votes  cast on such  proposal  in  person  or by proxy at the  Annual
Meeting is required.  Abstentions  and broker  "non-votes" for such proposal are
not considered to have been voted on the proposal.

Revocability and Voting of Proxies

      Any person signing a proxy in the form  accompanying  this proxy statement
has the power to revoke it prior to the Annual  Meeting or at the Annual Meeting
prior to the vote  pursuant  to the proxy.  A proxy may be revoked by any of the
following methods:

o  by writing a letter delivered to Thomas N. Konatich, Secretary of SIGA,
   stating that the proxy is revoked;

o  by submitting another proxy with a later date; or

o  by attending the Annual Meeting and voting in person.

      Please note, however, that if a stockholder's shares are held of record by
a  broker,  bank or other  nominee  and that  stockholder  wishes to vote at the
Annual Meeting,  the stockholder  must bring to the Annual Meeting a letter from
the broker,  bank or other  nominee  confirming  that  stockholder's  beneficial
ownership of the shares.

      Unless we receive  specific  instructions  to the  contrary or unless such
proxy is revoked,  shares  represented  by each properly  executed proxy will be
voted:  (i) FOR the election of each of SIGA's nominees as a director;  (ii) FOR
the  ratification  of  the  appointment  of  PricewaterhouseCoopers  LLP  as the
independent registered public accounting firm of SIGA for the fiscal year ending
December  31,  2005;  (iii) FOR the approval of an amendment to the SIGA Plan to
increase  the maximum  number of shares of Common Stock  available  for issuance
under the Plan from 10,000,000 shares to 11,000,000 shares and (iv) with respect
to any other  matters that may properly come before the Annual  Meeting,  at the
discretion of the proxy  holders.  SIGA does not presently  anticipate  that any
other business will be presented for action at the Annual Meeting.

Solicitation

      SIGA will pay the costs relating to this proxy  statement,  the proxy card
and the Annual  Meeting.  SIGA may reimburse  brokerage  firms and other persons
representing  beneficial  owners of  shares  for their  expenses  in  forwarding
solicitation  material to  beneficial  owners.  Directors,  officers and regular
employees may also solicit proxies by telephone,  facsimile or other means or in
person. They will not receive any additional payments for the solicitation.


                                       2


                                 PROPOSAL NO. 1

                              ELECTION OF DIRECTORS

      Ten directors are to be elected at the Annual Meeting to hold office until
the next Annual Meeting of  Stockholders  and until their  successors  have been
duly elected and qualified.  Unless otherwise instructed, the proxy holders will
vote the proxies  received by them FOR the election of the ten persons  named in
the table  below as  directors  of SIGA.  Proxies  cannot be voted for a greater
number of persons  than the nominees  named.  In the event that any of the below
listed  nominees for director  should  become  unavailable  for election for any
presently  unforeseen  reason,  the persons named in the accompanying proxy form
have the right to use their discretion to vote for a substitute.

      THE BOARD OF DIRECTORS  RECOMMENDS  THAT THE  STOCKHOLDERS  VOTE "FOR" THE
ELECTION  (ITEM 1 OF THE ENCLOSED  PROXY CARD) OF MR.  DRAPKIN,  MR. ANTAL,  MR.
CONSTANCE,  DR. KASTEN, DR. MJALLI, DR. OZ, DR. ROSE, MR. SAVAS, MS. SLOTKIN AND
DR. WEINER AS DIRECTORS.

Director Nominee Information

      The following table sets forth  biographical  information of each director
nominee,  including their ages, data on their business backgrounds and the names
of public  companies  and other  selected  entities for which they also serve as
directors:

       Name                         Age        Position
       ----                         ---        --------
       Donald G. Drapkin*            57        Chairman of the Board
       James J. Antal*               54        Director
       Thomas E. Constance*          68        Director
       Bernard L. Kasten Jr. M.D.    58        Director, Chief Executive Officer
       Adnan M. Mjalli, Ph.D.        41        Director
       Mehmet C. Oz, M.D. *          43        Director
       Eric A. Rose, M.D. *          53        Director
       Paul G. Savas*                42        Director
       Judy S. Slotkin*              52        Director
       Michael A.  Weiner, M.D. *    59        Director

*     Determined  by the Board of Directors to be  independent  pursuant to Rule
      4200 of the NASD Marketplace Rules.

      Donald G.  Drapkin  has served as  Chairman of the Board and a director of
SIGA since April 19, 2001.  Mr. Drapkin has been Vice Chairman and a director of
MacAndrews  & Forbes  Holdings  Inc. and various of its  affiliates  since 1987.
Prior to joining  MacAndrews & Forbes, Mr. Drapkin was a partner in the law firm
of  Skadden,  Arps,  Slate,  Meagher & Flom LLP for more than  five  years.  Mr.
Drapkin is also a director (or member of the board of managers,  as  applicable)
of the  following  corporations  which file reports  pursuant to the  Securities
Exchange Act of 1934: Allied Security Holdings,  LLC, Anthracite Capital,  Inc.,
Nephros,  Inc, Playboy  Enterprises,  Inc., Revlon Consumer Products Corporation
and Revlon Inc. Mr. Drapkin is also a director of PharmaCore, Inc. and TransTech
Pharma, Inc.

      James J. Antal has served as a director of SIGA since  November  2004. Mr.
Antal has been an active  consultant and founding  investor in several  Southern
California  based  emerging  companies,  including  serving  as Chief  Financial
Advisor to Black  Mountain Gold Coffee Co.,  since his  retirement in 2002.  Mr.
Antal was the Chief Financial Officer and Chief Investment  Officer from 1996 to
2002 for Experian,  a $1.6 billion  global  information  services  subsidiary of
UK-based GUS plc. Prior to the GUS  acquisition of Experian (the former TRW Inc.
Information  Systems and Services  businesses),  Mr. Antal held various  finance
positions  with TRW from 1978 to 1996,  including  Senior VP of Finance  for TRW
Information  Systems and Services and TRW Inc.  Corporate  Director of Financial
Reporting and Accounting.  He earned his undergraduate degree in accounting from
The Ohio State


                                       3


University in 1973, and became a certified public  accountant (Ohio) in 1974. He
engaged in active practice as a CPA with Ernst & Ernst until 1978. Mr. Antal has
served as a director of First American Real Estate Solutions,  an Experian joint
venture with First American Financial Corp.

      Thomas E. Constance has served as a director of SIGA since April 19, 2001.
Mr.  Constance is Chairman and, since 1994, a partner of Kramer Levin Naftalis &
Frankel LLP, a law firm in New York City. Mr.  Constance was a director of Kroll
Inc.,  which ceased to file reports  pursuant to the Securities  Exchange Act of
1934 in  August  2004.  Mr.  Constance  serves  as a  Trustee  of the M.D.  Sass
Foundation and St. Vincent's  Services.  He also serves on the Advisory Board of
Directors of Barington Capital, L.P.

      Bernard L. Kasten Jr., M.D. has been a director of SIGA since May 23, 2003
and  became  Chief  Executive  Officer in the third  quarter  of 2004.  Prior to
becoming Chief Executive Officer of SIGA and since February 2002, Dr. Kasten had
been Vice President,  Medical Affairs of MedPlus Inc., a healthcare  information
technology company and a wholly-owned  subsidiary of Quest Diagnostics,  Inc., a
diagnostic testing, information and services company. Since 1975, Dr. Kasten has
been  a  Diplomat  of the  American  Board  of  Pathology  with a  sub-specialty
certification in 1976 in Medical  Microbiology.  Dr. Kasten's staff appointments
have included  service in the Division of  Laboratory  Medicine at The Cleveland
Clinic;  Associate Director of Pathology and Laboratory Services at the Bethesda
Hospital  Systems  in  Cincinnati,  Ohio and Chief  Laboratory  Officer at Quest
Diagnostics  Incorporated.  Dr.  Kasten was a founder of Plexus  Vaccine Inc., a
vaccine  company of which SIGA acquired  substantially  all of the assets in May
2003.  Dr.  Kasten is an author of  "Infectious  Disease  Handbook" 5th Edition,
2003, Lexi-Comp Inc.

      Adnan M.  Mjalli,  Ph.D.  has served as a director  of SIGA since  January
2004. Dr. Mjalli founded TransTech Pharma, Inc., a privately held drug discovery
company  in High  Point,  North  Carolina,  in 1999 and has since  served as its
President and Chief Executive  Officer.  He also serves as Chairman of the Board
of  PharmaCore,  Inc.  where he  previously  served  as  President  and CEO from
December of 1998 to November  2000.  Dr. Mjalli  obtained his Ph.D. in medicinal
chemistry in 1989 from the University of Exeter,  UK. His postdoctoral  work was
carried out at the University of Rochester.  Prior to founding TransTech Pharma,
he held various  positions of increasing  responsibility  in research and senior
management at several  pharmaceutical  and  biotechnology  companies,  including
Merck & Co., Inc.

      Mehmet C. Oz, M.D.  has served as a director of SIGA since April 19, 2001.
Dr. Oz has been a Cardiac Surgeon at Columbia University  Presbyterian  Hospital
since 1993 and a  Professor  of Surgery  and Vice  Chairman  for  Cardiovascular
Services of the  Department of Surgery there since July 2001. Dr. Oz directs the
following  programs  at New  York  University  Presbyterian  Hospital,  Columbia
University:  the Cardiovascular  Institute,  the complementary medicine program,
the clinical  profusion program and clinical trials of new surgical  technology.
Dr. Oz received his undergraduate  degree from Harvard  University in 1982, and,
in  1986,  he  received  a joint  M.D./M.B.A.  degree  from  the  University  of
Pennsylvania Medical School and the Wharton School of Business.

      Eric A. Rose,  M.D. has served as a director of SIGA since April 19, 2001.
From April 19,  2001 until  June 21,  2001,  Dr.  Rose  served as Interim  Chief
Executive  Officer of SIGA. Dr. Rose is currently  Chairman of the Department of
Surgery and  Surgeon-in-Chief  of the Columbia  Presbyterian  Center of New York
Presbyterian  Hospital,  a position he has held since August 1994. Dr. Rose is a
past President of the International  Society for Heart and Lung Transplantation.
Dr. Rose was recently  appointed as Morris & Rose Milstein  Professor of Surgery
at Columbia  University's  College of  Physicians  and  Surgeons'  Department of
Surgery. Dr. Rose is a director of PharmaCore,  Inc., TransTech Pharma, Inc. and
a former  director of Nexell  Therapeutics  Inc.  (f/k/a  VimRx).  Dr. Rose is a
graduate of both Columbia College and Columbia  University College of Physicians
& Surgeons.

      Paul G. Savas has served as a director  of SIGA since  January  2004.  Mr.
Savas  has been a Senior  Vice  President  of  Finance  at  MacAndrews  & Forbes
Holdings,  Inc. and its affiliates since October 2002, and was Vice President of
MacAndrews & Forbes and its affiliates  from 1998 until 2002. He was Director of
Corporate  Finance at  MacAndrews & Forbes from 1994 until 1998.  From  December
1988 until April 1994,  Mr.  Savas  served in the  Finance  Department  of NYNEX
Corporation holding the positions of Associate Director of Corporate Finance and
Staff Director of External Reporting.

      Judy S. Slotkin has served as a director of SIGA since  November 2004. Ms.
Slotkin was Co-Head of the Finance  Committee of the Modern  Africa Fund, a $120
million private equity fund, from 1998 until 2003. Ms.


                                       4


Slotkin  was  formerly  Department  Head in the  Corporate  Finance  Division of
Citigroup  (Citibank  Investment  Bank)  where she was  responsible  for various
businesses  and the first head of the group's  Capital  Markets  Desk.  Prior to
that, Ms. Slotkin held various positions in the Citigroup (Citibank)  commercial
bank. Ms. Slotkin is also a founding member of the Food Allergy  Initiative,  an
organization funding research,  legislative  initiatives and education regarding
food allergies. Ms. Slotkin received her undergraduate degree in accounting from
Fairleigh  Dickinson  University  in 1976 and, in 1980,  she received her MBA in
Finance from Fordham University.

      Michael A.  Weiner,  M.D. has served as a director of SIGA since April 19,
2001. Dr. Weiner is the Hettinger Professor of Pediatrics at Columbia University
College of Physicians  and Surgeons  since 1996. Dr. Weiner is also the Director
of  Pediatric  Oncology  at New York  Presbyterian  Hospital.  Dr.  Weiner was a
director of Nexell Therapeutics,  Inc. (f/k/a VimRx) from March 1996 to February
1999. Dr. Weiner is a 1972 graduate of the New York State Health Sciences Center
at Syracuse and was a post  graduate  student at New York  University  and Johns
Hopkins University.

Meetings of the Board of Directors

      The Board of Directors of SIGA held six meetings during 2004. During 2004,
no director  attended  fewer than 75% of the  aggregate  of the  meetings of the
Board of Directors  and  committees  thereof,  if any,  upon which such director
served  during the period for which he has been a director or committee  member.
In addition,  two actions were taken during 2004 by unanimous written consent of
the directors.

      Those members of the Board of Directors who are  independent as defined by
Rule 4200 of the NASD Marketplace Rules (the  "Independent  Directors") are also
required,  pursuant  to  Rule  4350(c)(2)  of the  NASD  Marketplace  Rules,  to
regularly convene executive  sessions where only such Independent  Directors are
present. Such meetings may be in conjunction with  regularly-scheduled  meetings
of the  Board of  Directors.  Each  member  of the  Board of  Directors  is also
expected to attend the annual meeting of stockholders of SIGA.  Seven members of
the Board of Directors attended SIGA's 2004 annual meeting of stockholders.

Committees of the Board of Directors

      The Board of  Directors  currently  has,  and  appoints  the  members  of,
standing Audit, Compensation and Nominating and Corporate Governance Committees.
Each member of the Audit,  Compensation and Nominating and Corporate  Governance
Committees is an Independent  Director.  Each of these  committees has a written
charter  approved by the Board of the  Directors  in March 2004.  A copy of each
charter  is  posted on  SIGA's  website  at  www.siga.com  under the  "Corporate
Governance" section.

      Audit  Committee.  The  Audit  Committee,   which  currently  consists  of
directors Paul G. Savas,  Judy S. Slotkin and James J. Antal, held five meetings
during 2004. The Board of Directors has  determined  that each of the members of
the Audit  Committee  is  "independent"  under the  applicable  laws,  rules and
regulations.  The Company has determined  that Mr. Savas is an "Audit  Committee
financial  expert"  within the  meaning of  Regulation  S-K  promulgated  by the
Securities  and  Exchange  Commission  (the  "SEC").  The  purpose  of the Audit
Committee is to assist the Board of Directors in the  oversight of the integrity
of the financial statements of SIGA, SIGA's compliance with legal and regulatory
matters, the independent  registered public accounting firm's qualifications and
independence,  and the  performance  of  SIGA's  independent  registered  public
accounting  firm. The primary  responsibilities  of the Audit  Committee are set
forth in its charter,  and include various matters with respect to the oversight
of SIGA's accounting and financial reporting process and audits of the financial
statements of SIGA on behalf of the Board of Directors. The Audit Committee also
selects the independent  registered public accounting firm to conduct the annual
audit of the financial  statements of SIGA;  reviews the proposed  scope of such
audit;  reviews  accounting and financial  controls of SIGA with the independent
registered  public  accounting  firm and our  financial  accounting  staff;  and
reviews and approves  transactions between us and our directors,  officers,  and
their  affiliates.  A copy of the Audit Committee charter is available on SIGA's
website (as described above). Also see "Audit Committee Report."

      Compensation  Committee.  The  Compensation  Committee,   which  currently
consists of directors  Donald G.  Drapkin,  Paul G. Savas and Mehmet C. Oz, held
three meetings during 2004. In addition,  Michael A. Weiner,  M.D. served on the
Compensation  Committee  during 2004. The Board of Directors has determined that
each of the


                                       5


members of the Compensation Committee is "independent" within the meaning of the
NASDAQ listing standards. The Compensation Committee functions include reviewing
and  approving  the  compensation  and benefits for SIGA's  executive  officers,
administering  SIGA's  stock  plans and making  recommendations  to the Board of
Directors regarding these matters. A copy of the Compensation  Committee charter
is available on SIGA's website. Also see "Compensation Committee Report."

      Nominating  and  Corporate  Governance   Committee.   The  Nominating  and
Corporate  Governance  Committee (the "Nominating  Committee"),  which currently
consists of directors Judy S. Slotkin, James J. Antal and Michael A. Weiner, was
formed in March 2004 and held one meeting in 2004.  The Board of  Directors  has
determined that each of the members of the Nominating Committee is "independent"
within the meaning of the NASDAQ listing standards.  The Nominating Committee is
responsible  for  searching  for and  recommending  to the  Board  of  Directors
potential nominees for director positions,  making  recommendations to the Board
of Directors  regarding the size and  composition  of the Board of Directors and
its committees,  monitoring the Board of Director's effectiveness and developing
and implementing the SIGA's corporate governance procedures and policies. A copy
of the Nominating  and Corporate  Governance  Committee  charter is available on
SIGA's website.

      In  selecting  candidates  for the  Board  of  Directors,  the  Nominating
Committee  begins by  determining  whether the incumbent  directors  whose terms
expire at the  annual  meeting  of  stockholders  desire  and are  qualified  to
continue  their service on the Board of Directors.  SIGA is of the view that the
continuing service of qualified  incumbents promotes stability and continuity in
the board room,  giving SIGA the benefit of the familiarity and insight into the
SIGA's affairs that its directors have  accumulated  during their tenure,  while
contributing  to the Board of Director's  ability to work as a collective  body.
Accordingly,  it is the  policy  of the  Nominating  Committee,  absent  special
circumstances, to nominate qualified incumbent directors who continue to satisfy
the  Nominating  Committee's  criteria for membership on the Board of Directors,
whom  the  Nominating   Committee  believes  will  continue  to  make  important
contributions to the Board of Directors and who consent to stand for re-election
and, if  re-elected,  to continue  their service on the Board of  Directors.  If
there are positions on the Board of Directors for which the Nominating Committee
will not be re-nominating an incumbent director, or if there is a vacancy on the
Board of Directors,  the Nominating  Committee will solicit  recommendations for
nominees from persons whom the  Nominating  Committee  believes are likely to be
familiar with qualified candidates,  including members of the Board of Directors
and management of SIGA. The Nominating  Committee may also engage a professional
search firm to assist in the identification of qualified candidates, but did not
do so in 2004. As to each  recommended  candidate that the Nominating  Committee
believes merits serious consideration,  the Nominating Committee will collect as
much  information,  including  without  limitation,  soliciting views from other
directors  and SIGA's  management  and having one or more  Nominating  Committee
members  interview  each such  candidate,  regarding  each candidate as it deems
necessary or appropriate  in order to make an informed  decision with respect to
such candidate.  Based on all available information and relevant considerations,
the Nominating  Committee will select,  for each  directorship  to be filled,  a
candidate  who,  in the view of the  Nominating  Committee,  is most  suited for
membership  on the  Board of  Directors.  In  making  its  selection,  SIGA will
evaluate  candidates  proposed by  stockholders  under  criteria  similar to the
evaluation  of other  candidates,  except  that  the  Nominating  Committee  may
consider,  as one of the factors in its  evaluation of  stockholder  recommended
nominees, the size and duration of the interest of the recommending  stockholder
or stockholder group in the equity of SIGA. This  consideration may also include
how long the  recommending  stockholder  intends to continue  holding its equity
interest in SIGA.

      The  Nominating  Committee has adopted a policy with regard to the minimum
qualifications  that must be met by a Nomination  Committee-recommended  nominee
for a position on SIGA's Board of  Directors,  which policy is described in this
paragraph.  The Nominating  Committee generally requires that all candidates for
the Board of Directors be of high personal integrity and ethical character.  The
Nominating Committee requires that candidates not have any interests that would,
in the view of the Nominating Committee, materially impair his or her ability to
(i) exercise  independent  judgment or (ii)  otherwise  discharge  the fiduciary
duties owed as a director to SIGA and its stockholders.  In addition, candidates
must be able to represent  fairly and equally all  stockholders  of SIGA without
favoring or advancing any particular  stockholder or other constituency of SIGA.
Candidates must have demonstrated achievement in one or more fields of business,
professional,   governmental,  communal,  scientific  or  educational  endeavor.
Candidates  are  expected  to have  sound  judgment  and a general  appreciation
regarding major issues facing public  companies of a size and operational  scope
similar  to  SIGA,  including  contemporary   governance  concerns,   regulatory
obligations of a public issuer,  strategic business  planning,  competition in a
global economy,  and basic concepts of corporate  finance.  Candidates must also
have, and be prepared to devote, adequate time to the


                                       6


Board and its committees.  It is expected that,  taking into account their other
business and professional commitments,  including their service on the boards of
other  companies,  each  candidate  will be available to attend  meetings of the
Board and any  committees on which the candidate  will serve,  as well as SIGA's
annual meeting of  stockholders.  SIGA also requires that at least a majority of
the directors serving at any time on the Board are independent, as defined under
the rules of the NASDAQ  stock  market and that at least three of the  directors
satisfy the financial  literacy  requirements  required for service on the Audit
Committee under the rules of the NASDAQ stock market.

      The  Nominating  Committee  has  adopted  a  policy  with  regard  to  the
consideration of director candidates  recommended by stockholders,  the material
elements  of which  policy  are  described  in this  paragraph.  The  Nominating
Committee will consider recommendations for nomination for director submitted by
holders  of  SIGA's  shares  entitled  to  vote  generally  in the  election  of
directors.   The  Nominating   Committee  will  give   consideration   to  these
recommendations  for positions on the Board where the  Nominating  Committee has
not  determined  to  re-nominate  a  qualified  incumbent  director.  While  the
Nominating  Committee  has not  established  a minimum  number of shares  that a
stockholder  must  own in order  to  present  a  nominating  recommendation  for
consideration, or a minimum length of time during which the stockholder must own
its shares, the Nominating Committee may take into account the size and duration
of a  recommending  stockholder's  ownership  interest in SIGA.  The  Nominating
Committee  may also  consider  whether  the  stockholder  making the  nominating
recommendation   intends  to   maintain  an   ownership   interest  in  SIGA  of
substantially  the  same  size as at its  interest  at the  time of  making  the
recommendation.  The Nominating Committee may refuse to consider recommendations
of nominees  who do not satisfy the  minimum  qualifications  prescribed  by the
Nominating Committee for board candidates.

      The  Nominating  Committee  has  adopted  procedures  to  be  followed  by
stockholders  in  submitting  recommendations  of candidates  for director.  The
procedures  are posted on SIGA's  website at  www.siga.com  under the "Corporate
Governance" section, and described in this paragraph. A stockholder (or group of
stockholders)  wishing  to  submit a  nominating  recommendation  for an  annual
meeting of  stockholders  should try to ensure that it is  received by SIGA,  as
provided herein, not later than 120 calendar days prior to the first anniversary
of the date of the proxy statement for the prior annual meeting of stockholders.
All stockholder nominating  recommendations  should be in writing,  addressed to
"the  Nominating  and  Corporate  Governance  Committee"  care of  SIGA's  Chief
Financial Officer at SIGA's principal headquarters,  420 Lexington Avenue, Suite
601, New York, New York 10170.  Submissions  should be made by mail,  courier or
personal  delivery.  A nominating  recommendation  should be  accompanied by the
following information concerning each recommending stockholder:

o  The  name  and  address,  including  telephone  number,  of the  recommending
   stockholder;

o  The number and class of SIGA's  shares owned  (beneficially  or of record) by
   the  recommending  stockholder and the time period for which such shares have
   been held;

o  A statement  from the  stockholder as to whether the  stockholder  has a good
   faith  intention to continue to hold the reported  shares through the date of
   SIGA's next annual meeting of stockholders;

o  Sufficient   information  about  the  proposed  nominee  for  the  Nominating
   Committee to make an informed  decision  regarding the  qualifications of the
   proposed nominee;

o  Any   relationship   between  the  proposed   nominee  and  the  recommending
   stockholder; and

o  Such other information as the Nominating Committee may reasonably request.

The nominating recommendation must be accompanied by the consent of the proposed
nominee  to be  interviewed  by the  Nominating  Committee,  if  the  Nominating
Committee  chooses to do so in its discretion (and the recommending  stockholder
must  furnish the  nominee's  contact  information  for this  purpose),  and, if
nominated and elected, to serve as a director of SIGA.


                                       7


Compensation Committee Interlocks and Insider Participation

      None.

Code of Ethics

      SIGA has adopted a code of ethics and business conduct that applies to its
officers,  directors and  employees,  including  without  limitation,  our Chief
Executive  Officer,  Chief Financial Officer and Chief Scientific  Officer.  The
Code  of  Ethics  and  Business  Conduct  is  available  on  SIGA's  website  at
www.siga.com under the "Corporate Governance" section.

Stockholder Communications with the Board of Directors

      SIGA  stockholders may send  communications to the Board, any committee of
the Board or an individual director.  The process for so communicating is posted
on SIGA's website at www.siga.com under the "Corporate Governance" section.


                                       8


                          REPORT OF THE AUDIT COMMITTEE

      The members of the Audit  Committee  have been  appointed  by the Board of
Directors.  During the 2004 fiscal year, the Audit Committee consisted solely of
independent  directors,  as defined in Rule  4200(a)(15) of the NASD Marketplace
Rules. The Audit Committee operates under a written charter that was amended and
restated by the Board of  Directors  in March 2004 in order to assure  continued
compliance by SIGA with SEC and NASDAQ rules enacted in response to requirements
of the Sarbanes-Oxley Act.

      The Audit  Committee  assists the Board of  Directors  in  monitoring  the
integrity of SIGA's  financial  statements,  the independent  registered  public
accounting  firm's  qualifications  and  independence,  the  performance  of the
independent  registered  public accounting firm, and the compliance by SIGA with
legal and regulatory requirements. Management is responsible for SIGA's internal
controls and the financial reporting process. The independent  registered public
accounting  firm is responsible  for  performing an independent  audit of SIGA's
financial  statements in accordance with generally  accepted auditing  standards
and for  issuing a report on those  financial  statements.  The Audit  Committee
monitors and oversees these processes.

      In this  context,  the Audit  Committee  has  reviewed and  discussed  the
audited  financial  statements  for  the  year  ended  December  31,  2004  with
management and with  PricewaterhouseCoopers  LLP, SIGA's independent  registered
public    accounting    firm.   The   Audit   Committee   has   discussed   with
PricewaterhouseCoopers  LLP the matters required to be discussed by Statement on
Auditing  Standards  No.  61  (Communications  with  Audit  Committees),   which
includes,  among  other  items,  matters  related to the conduct of the audit of
SIGA's annual financial statements.

      The Audit  Committee  has also  received the written  disclosures  and the
letter from  PricewaterhouseCoopers LLP required by Independence Standards Board
Standard  No.  1  (Independence  Discussions  with  Audit  Committees)  and  has
discussed with  PricewaterhouseCoopers  LLP the issue of their independence from
SIGA and management. In addition, the Audit Committee has considered whether the
provision of non-audit services by the independent  registered public accounting
firm in 2004 is compatible with  maintaining the auditors'  independence and has
concluded that it is.

      Based on its review of the audited  financial  statements  and the various
discussions  noted  above,  the  Audit  Committee  recommended  to the  Board of
Directors  that the audited  financial  statements  be included in SIGA's Annual
Report on Form 10-K for the year ended  December 31, 2004.  The Audit  Committee
has also  recommended,  subject to  stockholder  ratification,  the selection of
SIGA's  independent  registered  public  accounting  firm  for the  year  ending
December 31, 2005.

      The members of the Audit Committee are Paul G. Savas,  Judy S. Slotkin and
James J.  Antal,  none of whom is or,  during the  fiscal  year  2004,  was,  an
employee of SIGA.

                            Respectfully submitted by the Audit Committee,
                            Paul G. Savas, Chairman
                            James J. Antal
                            Judy S. Slotkin


                                       9


             COMPENSATION COMMITTEE REPORT ON EXECUTIVE COMPENSATION

      During the year ended  December 31, 2004, the  Compensation  Committee was
comprised  of Donald G.  Drapkin,  Paul G. Savas and Mehmet C. Oz. In  addition,
Michael A. Weiner,  M.D. served on the  Compensation  Committee during 2004. The
Compensation   Committee's   duties  include   determination  of  the  Company's
compensation and benefit  policies and practices for executive  officers and key
managerial  employees.  In  accordance  with rules  established  by the SEC, the
Company is required to provide  certain  data and  information  in regard to the
compensation  provided to the  Company's  Chief  Executive  Officer and the four
other most highly compensated executive officers.

      COMPENSATION   POLICIES.   The  overall   objectives   of  the   Company's
compensation  program  are to attract  and retain  the best  possible  executive
talent,  to  motivate  these  executives  to achieve  the goals  inherent in the
Company's  business  strategy,  to  maximize  the  link  between  executive  and
stockholder  interests  through a stock option plan and to recognize  individual
contributions as well as overall business results.  To achieve these objectives,
the  Company  has  developed  an  overall  compensation  strategy  and  specific
compensation plans that tie a substantial portion of an executive's compensation
to performance.

      The key elements of the Company's  compensation  program  consist of fixed
compensation  in the form of base salary,  and the  discretion to award variable
compensation  in the forms of annual  incentive  compensation  and stock  option
awards.  The  Compensation  Committee's  policies  with respect to each of these
elements are discussed  below.  In addition,  while the elements of compensation
described below are considered separately, the Compensation Committee takes into
account the full compensation package afforded by the Company to the individual,
including  pension  benefits,  insurance  and  other  benefits,  as  well as the
programs described below.

      BASE SALARIES.  Base salaries for executive  officers are determined based
upon the  Compensation  Committee's  evaluation of the  responsibilities  of the
position  held  and  the  experience  of the  individual,  and by  reference  to
historical levels of salary paid by the Company.

      Salary  adjustments are based on a periodic  evaluation of the performance
of the Company and each executive  officer,  as well as financial results of the
business.  The  Compensation  Committee  takes  into  account  the effect of any
corporate  transactions that have been consummated during the relevant year and,
where appropriate,  also considers  non-financial  performance  measures.  These
include the Company's market share,  scientific developments and improvements in
relations with employees.

      ANNUAL INCENTIVE  COMPENSATION  AWARDS.  Annual incentive  compensation is
payable pursuant to contractual provisions with certain executives which provide
eligibility to receive performance based bonuses and/or  discretionary  bonuses.
The annual incentive  compensation earned by the executives with respect to 2004
was discretionary and determined by the Compensation Committee.

      OTHER INCENTIVE  COMPENSATION AWARDS. The principal component of executive
compensation  is the granting of stock options,  which are intended as a tool to
attract,  provide incentive to and retain those executives who make the greatest
contribution  to the  business,  and who can have  the  greatest  effect  on the
Company's long-term profitability. The exercise price of stock options is set at
a price equal to the market  price of the Common Stock at the time of the grant.
The options  therefore do not have any value to the executive  unless the market
price of the Common Stock rises.

      CHIEF EXECUTIVE  OFFICER  COMPENSATION.  Dr. Kasten began service as Chief
Executive  Officer  on July 2, 2004 and  continues  to serve in that  role.  The
compensation  of  Dr.  Kasten  continues  to be  governed  by the  terms  of his
Employment  Agreement  dated as of July 2, 2004,  which is described below under
the heading "Employment Contracts."


                                       10


      TAX DEDUCTIBILITY OF EXECUTIVE  COMPENSATION.  The Compensation  Committee
attempts  to ensure  full  deductibility  of  compensation  notwithstanding  the
limitation on the deductibility of certain compensation in excess of one million
dollars  under Section  162(m) of the Internal  Revenue Code of 1986, as amended
(the  "Code").  The  Company's  stock  option are  designed so as to cause stock
options  and  bonuses  granted  thereunder  to be  exempt  from the  limitations
contained in Section 162(m) of the Code.

                          Respectfully submitted by the Compensation Committee,
                          Donald G. Drapkin
                          Paul G. Savas
                          Mehmet C. Oz


                                       11


                            COMMON STOCK PERFORMANCE

      The following line graph compares the cumulative total stockholder  return
through December 31, 2004,  assuming  reinvestment of dividends,  by an investor
who invested $100 on December 31, 1999 in each of (i) the Common Stock, (ii) the
NASDAQ National Market-US; and (iii) the NASDAQ Pharmaceutical Index.

                              [LINE GRAPH OMITTED]


Value of Initial Investment      12/31/99   12/31/00   12/31/01   12/31/02   12/31/03   12/31/04
------------------------------   --------   --------   --------   --------   --------   --------
                                                                      
SIGA Technologies, Inc.          $ 100.00   $ 193.87   $ 177.91   $  87.73   $ 140.49   $ 101.84
NASDAQ Composite Index           $ 100.00   $ 122.99   $ 103.06   $  56.35   $  82.12   $  87.16
NASDAQ Biotech Composite Index   $ 100.00   $  60.71   $  47.93   $  32.82   $  49.23   $  53.46



                                       12


                                   MANAGEMENT

Officers

      The  following  table sets forth certain  information  with respect to the
executive officers of SIGA:



       Name                                Age        Position
       ----                                ---        --------
                                                
       Bernard L. Kasten Jr. M.D. (1)       58        Director, Chief Executive Officer
       Thomas N. Konatich                   59        Vice President, Chief Financial Officer, Secretary and Treasurer
       Dennis E. Hruby, Ph.D.               53        Vice President, Chief Scientific Officer
       John R. Odden (2)                    51        Vice President - Business Development


(1)   Dr.  Kasten became Chief  Executive  Officer in the third quarter of 2004.
      See  Director  Nominee   Information  above  for  additional   information
      regarding Dr. Kasten.

(2)   Mr.  Odden  became  Vice  President  - Business  Development  in the third
      quarter of 2004.

      Thomas N. Konatich has served as Vice President,  Chief Financial  Officer
and Treasurer  since April 1, 1998.  He was named  Secretary of SIGA on June 29,
2001 and from October 5, 2001 until July 2, 2004 was our Acting Chief  Executive
Officer.  From November 1996 through March 1998,  Mr.  Konatich  served as Chief
Financial  Officer  and  a  director  of  Innapharma,  Inc.,  a  privately  held
pharmaceutical  development  company.  From  1993  through  November  1996,  Mr.
Konatich served as Vice President and Chief Financial Officer of Seragen,  Inc.,
a publicly traded biopharmaceutical development company. Mr. Konatich has an MBA
from the Columbia Graduate School of Business.

      Dennis E. Hruby,  Ph.D.  has served as Vice  President - Chief  Scientific
Officer since June 2000. From April 1, 1997 through June 2000, Dr. Hruby was our
Vice  President of Research.  From  January 1996 through  March 1997,  Dr. Hruby
served as a senior  scientific  advisor to SIGA.  Dr.  Hruby is a  Professor  of
Microbiology at Oregon State  University,  and from 1990 to 1993 was Director of
the Molecular and Cellular Biology Program and Associate  Director of the Center
for Gene Research and Biotechnology.  Dr. Hruby specializes in virology and cell
biology  research,  and  the use of  viral  and  bacterial  vectors  to  produce
recombinant  vaccines.  He is a member of the American Society of Virology,  the
American  Society  for  Microbiology  and a fellow of the  American  Academy  of
Microbiology.  Dr. Hruby received a Ph.D. in microbiology from the University of
Colorado Medical Center and a B.S. in microbiology from Oregon State University.

      John R. Odden has served as Vice President - Business  Development of SIGA
since the  third  quarter  of 2004.  From  October  2002  until he  became  Vice
President - Business  Development  of SIGA in the third  quarter of 2004, he was
Vice  President,  Business  Development  for  Quest  Diagnostics,  Inc.  and its
MedPlus,  Inc. division,  the nation's leading provider of diagnostics  testing,
information  and  services,  where he was  responsible  for launching a national
biosurveillance  solution for homeland security and managing  relationships with
major healthcare  information  technology  companies.  From 1996 through October
2002,  he held a series  of  progressive  leadership  roles at First  Consulting
Group,  a leading  provider of consulting and systems  integration  services for
life sciences,  healthcare and government health services businesses.  Mr. Odden
has a B.S. in mathematics from the California Institute of Technology.

Summary Compensation Table

      The following table sets forth the total  compensation paid or accrued for
the years ended  December 31, 2004,  2003 and 2002, for each person who acted as
SIGA's Chief  Executive  Officer at any time during the year ended  December 31,
2004, and its most highly compensated  executive officers,  other than its Chief
Executive Officer, whose salary and bonus for the fiscal year ended December 31,
2004 were in excess of $100,000 each.


                                       13

                           Summary Compensation Table

                               Annual Compensation



                                                                                                    Long-Term
                                                                                                  Compensation
                                                                                                    Securities
                                                                  Other Annual                      Underlying
Name and Principal Position                Year    Salary ($)    Comensation ($)     Bonus ($)      Options (#)
                                          --------------------------------------  ------------------------------
                                                                                       
Bernard L. Kasten, M.D.                    2004      113,636              --              --          2,500,000
Chief Executive Officer (1)                2003           --              --              --                 --
                                           2002           --              --              --                 --

Thomas N. Konatich                         2004      218,485              --          50,000            150,000
Chief Financial Officer (2)                2003      210,000              --              --                 --
                                           2002      188,333              --              --            200,000

Dennis E. Hruby, Ph.D.                     2004      213,363              --          63,000            150,000
Chief Scientific Officer                   2003      210,000              --              --                 --
                                           2002      195,000              --              --            300,000

John R. Odden
Vice President Business Development (3)    2004       82,257              --              --            200,000
                                           2003           --              --              --                 --
                                           2002           --              --              --                 --

Susan K. Burgess, Ph.D.                    2004       78,710         252,000              --                 --
Former President(4)                        2003      135,692              --              --            300,000
                                           2002           --              --              --                 --


(1)   Dr.  Kasten became Chief  Executive  Officer in the third quarter of 2004.
      His  annual  salary is  $250,000.  See  "Employment  Contracts"  below for
      further description.

(2)   Mr. Konatich resigned as Acting Chief Executive Officer on July 2, 2004.

(3)   Mr.  Odden  became  Vice  President  - Business  Development  in the third
      quarter of 2004. His annual salary is $230,000. See "Employment Contracts"
      below for further description.

(4)   Dr.  Burgess  resigned  as  President  on  May  7,  2004.   "Other  Annual
      Compensation"  consists  of the  separation  compensation  received on the
      early termination of her Employment Agreement.


                                       14


Option Grants for the Year Ended December 31, 2004

The  following  table sets forth grants of stock  options  during the year ended
December 31, 2004 to anyone who served as Chief Executive  Officer and its three
highest paid employees. The exercise price at the time of the grant was equal to
or above the fair market value at the time of the grant.



                             Common Stock                         % of Total
                              Underlying      Potential Value       Options
                                Options         of Options        Granted to   Exercise Price
                                Granted       Granted ($) (1)      Employees      Per Share       Expiration Date
                                                                                      
Bernard L. Kasten, M.D.        2,500,000          900,000             73.4%          1.30            7/2/2114

Thomas N. Konatich               150,000           39,000              4.4%          1.40            7/29/2114

Dennis E. Hruby, Ph.D.           150,000           39,000              4.4%          1.40            6/29/2114

John R. Odden                    200,000           52,000              7.4%          1.40            7/29/2114


Option Exercises in Last Fiscal Year and Fiscal Year-End Option Values

      The following table provides certain summary information  concerning stock
options held as of December 31, 2004 by SIGA's Chief  Executive  Officer and its
three most highly compensated executive officers, other than its Chief Executive
Officer. No options were exercised during fiscal 2004 by any of the officers.




                                                                 Value of Unexercised
                            Number of Securities Underlying      In-The-Money Options
                                 Unexercised Options #         At fiscal Year-End ($) (1)
                                 ---------------------         --------------------------
                              Exercisable    Unexercisable    Exercisable    Unexercisable
                              -----------    -------------    -----------    -------------
                                                                   
Bernard L. Kasten, M.D.        500,000        2,000,000        180,000        720,000

Thomas N. Konatich              470,000           75,000         19,500         19,500

Dennis E. Hruby, Ph.D.          400,000          225,000             --         39,000

John R. Odden                    50,000          150,000         13,000         39,000


(1)   Based upon the closing  price on  December  31,  2004,  as reported on the
      Nasdaq SmallCap Market and the exercise price per option.

Long-Term Incentive Plans--Awards in Last Fiscal Year

      As of January 1, 1996,  we adopted our 1996  Incentive  and  Non-Qualified
Stock Option Plan. An amendment and  restatement  of such plan, as amended,  was
adopted on May 3, 2001 and was further refined by the Board of Directors on June
29, 2001 (the "Plan").  The Plan was approved by our  stockholders  at an annual
meeting on August  15,  2001.  Stock  options  may be granted to key  employees,
consultants  and outside  directors  pursuant to the Plan.  The Plan was amended
again at our annual meeting on January 8, 2004, when our  stockholders  voted to
increase  the maximum  number of shares of common stock  available  for issuance
under the Plan from 7,500,000 to 10,000,000.

      The Plan is administered by our  Compensation  Committee which  determines
persons to be granted stock  options,  the amount of stock options to be granted
to each such person, and the terms and conditions of any stock


                                       15



options as permitted under the Plan. The members of the  Compensation  Committee
are Mehmet C. Oz, M.D., Paul G. Savas and Donald G. Drapkin.  See "Committees of
the Board of Directors" above for more information.

      Both Incentive  Options and Nonqualified  Options may be granted under the
Plan.  An Incentive  Option is intended to qualify as an incentive  stock option
within the  meaning of Section  422 of the  Internal  Revenue  Code of 1986,  as
amended (the "Code").  Any Incentive  Option granted under the Plan will have an
exercise  price of not less than 100% of the fair market  value of the shares on
the date on which such option is granted.  With respect to an  Incentive  Option
granted to an employee who owns more than 10% of the total combined voting stock
of SIGA or of any parent or  subsidiary  of SIGA,  the  exercise  price for such
option must be at least 110% of the fair market  value of the shares  subject to
the option on the date the option is granted.

      The Plan,  as amended,  provides  for the  granting of options to purchase
10,000,000  shares of common stock, of which 9,762,061  options were outstanding
as of December 31, 2004.

      During the fiscal year ending  December 31, 2004, the named  Directors and
Officers of SIGA received  long-term  incentive  compensation  under the Plan as
shown in the following table.



                                  Estimated Future Payouts Under
                                    Non-Stock Price Based Plans
                                    ---------------------------
        (a)                        (b)                (c)             (d)           (e)          (f)
        ---                        ---                ---             ---           ---          ---
                               Number of        Performance or
                            Shares, Units or  Other Period Until
                              Other Rights       Maturation or     Threshold       Target     Maximum
Name                              (#)                Payout         ($ or #)      ($ or #)    ($ or #)
----                              ---                ------         --------      --------    --------
                                                                                  
Bernard L. Kasten, M.D.        2,500,000             7/2/2014          N/A           N/A         N/A
Thomas N. Konatich               150,000            7/29/2014          N/A           N/A         N/A
Dennis E. Hruby, Ph.D.           150,000            6/29/2014          N/A           N/A         N/A
John R. Odden                    200,000            7/29/2014          N/A           N/A         N/A
James J. Antal                    25,000           12/14/2014          N/A           N/A         N/A
Adnan M. Mjalli, Ph.D.            25,000           12/14/2014          N/A           N/A         N/A
Paul G. Savas                     25,000           12/14/2014          N/A           N/A         N/A




                                       16


Employment Contracts and Directors Compensation

Directors' Compensation

      Directors  who are not  currently  receiving  compensation  as officers or
employees of the Company or any of its affiliates receive $1,000 per meeting for
board  meetings  and  will  be  reimbursed  for  expenses  incurred  by  them in
connection  with  serving on our Board of  Directors.  The chairman of the Audit
Committee  will receive  $1,000 per meeting for meetings of the Audit  Committee
and all other members of the Audit  Committee  will receive $500 per meeting for
meetings  of  the  Audit  Committee.   Members  of  Compensation  Committee  and
Nominating and Corporate  Governance Committee will receive $500 per meeting for
meetings of the Compensation  Committee and Nominating and Corporate  Governance
Committee.

      Non-employee  directors  will receive an initial grant of 25,000  options,
upon such  non-employee  director's  first  election to the Board of  Directors,
which such  options  will be granted  under  SIGA's  Amended and  Restated  1996
Incentive  and  Non-Qualified  Stock  Option  Plan.  In  addition,  non-employee
directors  will receive an annual grant of 10,000  options under SIGA's  Amended
and Restated 1996 Incentive and  Non-Qualified  Stock Option Plan,  made at each
Annual Meeting and  commencing  with the 2005 Annual  Meeting.  All such options
have an exercise  price equal to the fair market  value of the  underlying  SIGA
shares on the date of grant.

Equity Compensation Plan Information

      The following table sets forth certain  compensation plan information with
respect to both equity  compensation  plans  approved  by  security  holders and
equity  compensation  plans not approved by security  holders as of December 31,
2004:



                                                                                                 Number of securities
                                                                                               remaining available for
                                        Number of securities to be      Weighted-average         future issuance under
                                          issued upon exercise of      exercise price of       equity compensation plans
                                            outstanding options,      outstanding options,       (excluding securities
Plan Category                               warrants and rights       warrants and rights       reflected in column (a))
                                                   (a)                         (b)                        (c)
                                                                                                 
Equity compensation plans
approved by security holders (1)                 9,762,061                    $1.99                       22,898

Equity compensation plans not
approved by security holders                       250,000                    $2.00                           --

Total                                           10,012,061                    $1.99                       22,898


(1)   SIGA   Technologies,   inc.,  Amended  and  Restated  1996  Incentive  and
      Non-Qualified Stock Option Plan.

Employment Contracts

      Dr. Bernard L. Kasten, SIGA's Chief Executive Officer, is employed by SIGA
under an  employment  agreement  dated July 2,  2004.  The  initial  term of the
employment  agreement  expires on July 2, 2007. The employment  agreement  will,
however, automatically renew for an additional three (3) years following the end
of the initial  term,  unless  either Dr. Kasten or SIGA provides at least three
(3) months advance notice of his/its desire not to renew. Dr. Kasten receives an
annual base salary of $250,000 and his  employment  agreement  also provides for
additional  bonus payments at the discretion of the Board of Directors.  On July
2, 2004, he received options to


                                       17


purchase  2,500,000  shares of common stock with an exercise  price of $1.30 per
share, of which 500,000 shares vested on the date of grant;  with respect to the
next  1,000,000  shares,  an additional  166,666 shares shall vest on the end of
each six (6) month period after date of grant until the end of the sixth six (6)
month period at which time 166,667 shares shall vest. In the event Dr.  Kasten's
employment  renews as described above,  with respect to the balance of 1,000,000
shares of common stock,  an additional  166,666  shares shall vest at the end of
each six (6) month period  commencing at the beginning of the renewal term until
the end of the sixth six (6) month  period at which time  166,667  shares  shall
vest.  Dr.  Kasten also received  options to purchase up to 4,800,000  shares of
common stock,  with an exercise price of $1.30 per share, if various  milestones
set forth in his  employment  agreement  are met. Dr. Kasten is also eligible to
receive  additional  stock options and bonuses at the discretion of the Board of
Directors.  SIGA may terminate the employment  agreement for cause (as such term
is defined in the employment  agreement) or for any other reason,  provided that
upon any termination  for any other reason (other than cause),  Dr. Kasten shall
receive  his salary  due and  payable  through  the date of  termination  plus a
severance  amount (as defined in the employment  agreement) to be paid through a
specified period during which his time vested options shall continue to vest. If
within 90 days prior to or 12 months  after a change of control (as such term is
defined in the employment  agreement) of SIGA either Dr. Kasten's  employment is
terminated or Dr. Kasten is no longer Chief  Executive  Officer of the surviving
organization and elects to terminate his employment as a result of the change of
control,  Dr.  Kasten will  receive  payments  as  specified  in the  employment
agreement.

      Thomas N.  Konatich,  SIGA's  Vice  President,  Chief  Financial  Officer,
Secretary and Treasurer, is employed by SIGA under an employment agreement dated
April 1, 1998,  as amended on January  19,  2000,  as amended  and  restated  on
October 6, 2000,  as amended as of January 31,  2002,  as amended on November 5,
2002 and as amended  on July 29,  2004.  This  employment  agreement  expires on
December 31, 2005.  Mr.  Konatich was also  formerly  employed as SIGA's  Acting
Chief Executive  Officer,  which duties  concluded on July 2, 2004. Mr. Konatich
receives an annual base salary of $230,000  and  received a one-time  payment of
$50,000 for his prior service as Acting Chief Executive Officer.  His employment
agreement also provides for an additional bonus payment at the discretion of the
Board of Directors  and not to exceed 25% of his annual base salary  amount.  He
received options to purchase 95,000 shares of common stock, at $4.44 on April 1,
1998.  The options  vested on a pro rata basis on the first,  second,  third and
fourth  anniversaries  of the  agreement.  On January 19,  2000,  he received an
additional  grant to purchase  100,000  shares at an exercise price of $2.00 per
share.  These options vest on a pro rata basis each quarter  through January 19,
2002. On January 31, 2002, Mr. Konatich was granted an "Incentive  Stock Option"
to purchase 50,000 shares at an exercise price of $3.94 per share.  Such options
vest in eight equal  quarterly  installments  beginning  on April 20,  2002.  On
November 5, 2002, Mr. Konatich was granted an Incentive Stock Option to purchase
150,000 shares at an exercise price of $2.50 per share.  75,000 of these options
vested  immediately  and 75,000 options vested on September 1, 2003. On July 29,
2004,  Mr.  Konatich was granted an Incentive  Stock Option to purchase  150,000
shares at an exercise  price of $1.40 per share.  75,000 of these options vested
immediately  and with the remaining  75,000 options  vesting on a pro rata basis
from  January  1,  2005  through   December  31,  2005  with  no  provision  for
acceleration under any  circumstances.  Mr. Konatich is also eligible to receive
additional  stock  options  and  bonuses  at  the  discretion  of the  Board  of
Directors. SIGA may terminate the employment agreement with or without cause (as
such  term is  defined  in the  employment  agreement),  provided  that upon any
termination  without  cause,  SIGA  will be  obligated  to  continue  to pay Mr.
Konatich's  salary and all other amounts due under the employment  agreement for
the  remainder of the term.  If Mr.  Konatich is  terminated  due to a change of
control (as such term is defined in the  employment  agreement),  SIGA shall pay
Mr.  Konatich  a change  in  control  amount  (as such  term is  defined  in the
employment  agreement)  plus his accrued and unpaid base salary,  and,  upon the
first  event  constituting  a change of  control,  all stock  options  and other
stock-based  grants to Mr. Konatich shall  immediately and irrevocably  vest and
become exercisable upon the date of such event.

      Dr. Dennis E. Hruby, Chief Scientific  Officer,  is employed by SIGA under
an employment  agreement dated January, 1, 1998, as amended on June 16, 2000, as
amended on  January  31,  2002,  as amended on October 3, 2002 and as amended on
July 29, 2004. This employment agreement expires on December 31, 2007. Dr. Hruby
receives a base salary of $225,000 per year and his  employment  agreement  also
provides  for  additional  bonus  payments  at the  discretion  of the  Board of
Directors and not to exceed 50% of his base salary  amount.  Dr. Hruby  received
options to purchase  10,000 shares of common stock at an exercise price of $5.00
per share on April 1, 1997 and  40,000  shares  of common  stock at an  exercise
price of $4.63 per share on April 1, 1998. The options  became  exercisable on a
pro rata  basis on the first,  second,  third and  fourth  anniversaries  of the
agreement.  Under the June 16, 2000 amendment,  Dr. Hruby was granted options to
purchase  125,000 shares of SIGA's common stock at $2.00 per share.  The options
vest  ratably over the  remaining  term of the  amendment.  The January 31, 2002
amendment


                                       18


changed the terms of the lock-up agreed to in the June 16, 2000 amendment to the
employment agreement limiting Hruby's ability to sell SIGA stock. On January 31,
2002,  Dr.  Hruby was granted an  "Incentive  Stock  Option" to purchase  50,000
shares at an exercise price of $3.94 per share.  Such options vest in four equal
annual installments beginning on August 15, 2002. As part of the October 3, 2002
amendment,  Dr. Hruby was granted an option to purchase 300,000 shares of common
stock.  Options  with  respect to 75,000  shares  vested upon the signing of the
amendment  and an  additional  75,000  shares  shall vest on a pro rata basis on
September 1 of each 2003,  2004 and 2005.  The options have an exercise price of
$2.50 per share.  Dr.  Hruby  surrendered  his option to  purchase  up to 50,000
shares of common stock of SIGA at an exercise price of $3.94 that he was granted
under an earlier amendment. On July 29, 2004, Dr. Hruby was granted an Incentive
Stock Option to purchase 150,000 shares at an exercise price of $1.40 per share,
which options shall vest in 75,000 share increments on December 31 of each year,
commencing  December 31, 2005. Dr. Hruby is eligible to receive additional stock
options  and  bonuses  at the  discretion  of the Board of  Directors.  SIGA may
terminate  the  employment  agreement  with or  without  cause  (as such term is
defined in the employment agreement), provided that upon any termination without
cause SIGA will be  obligated  to  continue  to pay Dr.  Hruby's  salary for the
remainder of the term.  In addition,  SIGA shall have the right to terminate Dr.
Hruby's  employment upon one (1) year written notice with such termination being
treated as a termination  for cause.  If Dr. Hruby is terminated due to a change
of control (as such term is defined in the employment agreement), SIGA shall pay
Dr. Hruby a change in control  amount (as such term is defined in the employment
agreement)  plus his accrued and unpaid base salary,  and,  upon the first event
constituting a change of control, all stock options and other stock-based grants
to Dr. Hruby shall immediately and irrevocably vest and become  exercisable upon
the date of such event.

      John L. Odden,  Vice-President - Business Development, is employed by SIGA
under an employment  agreement dated July 29, 2004 and which became effective on
August 23, 2004.  The initial term of the employment  agreement  expires on July
29, 2007. The employment  agreement will,  however,  automatically  renew for an
additional  one (1) year following the end of the initial term unless either Mr.
Odden or SIGA  provides  at least  three (3)  months  advance  notice of his/its
desire not to renew.  Mr. Odden  receives an annual base salary of $230,000.  In
addition,  upon  achieving  certain  milestones,  Mr.  Odden may  receive  bonus
payments.  Mr. Odden was granted an Incentive  Stock Option to purchase  200,000
shares at an exercise  price of $1.40 per share,  which  options shall vest with
respect to the first 50,000  shares,  on July 29, 2004 and  thereafter in 50,000
share increments on July 29, 2005, 2006 and 2007. In addition upon the formation
of  each  strategic  relationship  (as  defined  in the  employment  agreement),
resulting  substantially  from Mr. Odden's efforts,  Mr. Odden may be granted an
option to purchase  additional  shares of common stock at the  discretion of the
Board of Directors  and not to exceed  25,000  shares.  SIGA may  terminate  the
employment  agreement  for  cause  (as such term is  defined  in the  employment
agreement), or otherwise, provided that upon any termination without cause, SIGA
will be  obligated  to  continue  to pay Mr.  Odden's  base salary and all other
amounts  due  under the  employment  agreement  for a period  of six (6)  months
following  the date of  termination  or the remainder of the current term (be it
the initial  term or the  renewal  term,  if  applicable),  whichever  period is
shorter.  If within 90 days prior to or 12 months  after a change of control (as
such term is defined in the  employment  agreement)  of SIGA either Mr.  Odden's
employment  is  terminated  or Mr. Odden is no longer Vice  President - Business
Development of the surviving organization and elects to terminate his employment
as a result of the change of control, Mr. Odden will receive the base salary due
and payable  through such date of  termination  and, on the date that  corporate
action  approving  an event  that  constitutes  a change of  control,  all stock
options  and  other  stock-based  grants  to Mr.  Odden  shall  immediately  and
irrevocably vest and become exercisable as of that date.


                                       19


         SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

      The  following  tables  set  forth  certain   information   regarding  the
beneficial  ownership of SIGA's  voting  securities  as of March 31, 2005 of (i)
each person  known to SIGA to  beneficially  own more than 5% of the  applicable
class of voting  securities,  (ii) each  director and director  nominee of SIGA,
(iii) each Named Officer and (iv) all  directors and executive  officers of SIGA
as a group.  As of March 31, 2005, a total of 24,500,648  shares of Common Stock
and a total of 68,038 shares of Series A Preferred Stock were outstanding.  Each
share of Common  Stock and Series A  Preferred  Stock is entitled to one vote on
matters  on which  holders  of Common  Stock are  eligible  to vote.  The column
entitled  "Percentage of Total Voting Stock Outstanding" shows the percentage of
total voting stock beneficially owned by each listed party.

      The  number  of  shares  beneficially  owned  is  determined  under  rules
promulgated by the Securities and Exchange  Commission,  and the  information is
not necessarily  indicative of beneficial ownership for any other purpose. Under
those rules, beneficial ownership includes any shares as to which the individual
has sole or shared  voting power or  investment  power and also any shares which
the  individual  has the right to  acquire  within  60 days of March  31,  2005,
through the exercise or conversion of any stock  option,  convertible  security,
warrant or other right. Unless otherwise indicated,  each person or entity named
in the table has sole voting  power and  investment  power (or shares that power
with that person's spouse) with respect to all shares of capital stock listed as
owned by that person or entity.

                            Ownership of Common Stock

      The  following  tables  set  forth  certain   information   regarding  the
beneficial  ownership of SIGA's  voting  securities  as of March 31, 2005 of (i)
each person  known to SIGA to  beneficially  own more than 5% of the  applicable
class of voting  securities,  (ii) each  director and director  nominee of SIGA,
(iii) each Named  Officer,  and (iv) all  directors  and  officers  of SIGA as a
group. As of March 31, 2005, a total of 24,500,648  shares of common stock and a
total of 68,038 shares of Series A preferred stock were outstanding.  Each share
of common stock and Series A preferred  stock is entitled to one vote on matters
on  which  common  stockholders  are  eligible  to  vote.  The  column  entitled
"Percentage  of Total Voting  Stock" shows the  percentage of total voting stock
beneficially owned by each listed party.



                                                             Percentage of     Percentage of
Name and Address of                  Amount of Beneficial     Common Stock     Total Voting
Beneficial Owner (1)                     Ownership (2)        Outstanding    Stock Outstanding
--------------------                 --------------------    -------------  -------------------
                                                                         
Beneficial Holders

MacAndrews & Forbes Inc. (3)
35 East 62nd Street
New York, NY 10021 ................        5,036,458(4)          19.2%            19.2%

TransTech Pharma, Inc. ............        5,208,333(5)          19.9%            19.8%

Officers and Directors

Donald G. Drapkin (6)
35 East 62nd Street
New York, NY 10021 ................        1,798,326(7)           6.9%             6.9%

James J. Antal
30952 Steeplechase Dr.
San Juan Capistrano, CA
       94704 ......................           36,154(8)             *                *

Judy S. Slotkin (21)
888 Park Avenue
NY, NY 10021 ......................           25,000(9)             *                *

Thomas E. Constance
1177 Avenue of the Americas,
New York, NY 10036 ................          253,467(10)            *                *

Bernard L. Kasten Jr., M.D.(11) ...        1,129,027(12)          4.5%             4.5%



                                       20




                                                                         Percentage of     Percentage of
Name and Address of                              Amount of Beneficial     Common Stock     Total Voting
Beneficial Owner (1)                                 Ownership (2)        Outstanding    Stock Outstanding
--------------------                             --------------------    -------------  -------------------
                                                                                      
Adnan M. Mjalli, Ph.D
4170 Mendenhall Oaks Parkway, Suite 110
High Point, NC 27265 ....................               25,000(13)               *               --

Mehmet C. Oz, M.D
177 Fort Washington Ave
New York, NY 10032 ......................              125,000(14)               *                *

Eric A. Rose, M.D. (15)
122 East 78th Street
New York, NY 10021 ......................              790,090(16)             3.3%             3.3%

Paul G. Savas
35 East 62nd Street
New York, NY 10021 ......................               51,222(17)               *                *

Michael A. Weiner, M.D
161 Fort Washington Ave.
New York, NY 10032 ......................              125,000(14)               *                *

John R. Odden (18) ......................              105,240(19)               *                *

Thomas N. Konatich ......................              501,250(20)             2.0%             2.0%

Dennis E. Hruby, Ph.D ...................              400,000(20)             1.6%             1.6%

All Executive Officers and Directors as a
group (thirteen persons) ................            5,352,276(22)            18.4%            18.4%


---------------
*     Less than 1%

(1)   Unless otherwise indicated the address of each beneficial owner identified
      is 420 Lexington Avenue, Suite 408, New York, NY 10170.

(2)   Unless  otherwise  indicated,  each person has sole  investment and voting
      power with respect to the shares indicated.  For purposes of this table, a
      person or group of persons is deemed to have "beneficial ownership" of any
      shares as of a given  date  which  such  person  has the right to  acquire
      within 60 days after such date.  For purposes of computing the  percentage
      of outstanding  shares held by each person or group of persons named above
      on a given date,  any security  which such person or persons has the right
      to acquire within 60 days after such date is deemed to be outstanding  for
      the  purpose of  computing  the  percentage  ownership  of such  person or
      persons,  but is not deemed to be outstanding for the purpose of computing
      the percentage ownership of any other person.

(3)   MacAndrews & Forbes Inc. is a direct wholly-owned subsidiary of MacAndrews
      & Forbes Holdings Inc., a holding company whose sole stockholder is Ronald
      O. Perelman.

(4)   Includes  1,678,820  shares of common  stock  issuable  upon  exercise  of
      warrants.

(5)   Includes  1,736,111  shares of common  stock  issuable  upon  exercise  of
      warrants.

(6)   Mr.  Drapkin  is a  director  and Vice  Chairman  of  MacAndrews  & Forbes
      Holdings  Inc.  and  MacAndrews  & Forbes Inc. and a director of TransTech
      Pharma.

(7)   Includes  1,125,000  shares of common  stock  issuable  upon  exercise  of
      options,  shares of common  stock  underlying  a warrant to purchase up to
      347,826  shares of common  stock and shares of common  stock  underlying a
      warrant to  purchase  up to 30,500  shares of common  stock (the  "Drapkin
      September 2001 Investor  Warrant").  However,  the Drapkin  September 2001
      Investor Warrant provides that, with certain limited


                                       21


      exceptions,  such  warrant  is not  exercisable  if,  as a result  of such
      exercise,  the number of shares of common stock  beneficially owned by Mr.
      Drapkin and his affiliates (other than shares of common stock which may be
      deemed beneficially owned through the ownership of the unexercised portion
      of the Drapkin  September 2001 Investor Warrant) would exceed 9.99% of the
      outstanding  shares of common  stock.  Does not  include  shares of common
      stock that Mr. Drapkin,  as a director and Vice Chairman of Mafco Holdings
      Inc. and  MacAndrews & Forbes or as director of TransTech  Pharma,  may be
      deemed  to  beneficially  own  and  as  to  which  Mr.  Drapkin  disclaims
      beneficial ownership.

(8)   Includes 25,000 shares of common stock issuable upon exercise of options.

(9)   Includes 25,000 shares of common stock issuable upon exercise of options.

(10)  Includes  12,200  shares  issuable  upon  exercise of warrants and 225,000
      shares of common stock issuable upon exercise of options.

(11)  Dr.  Kasten  became our Chief  Executive  Officer in the third  quarter of
      2004.

(12)  Includes  1,350 shares of common stock  issuable upon exercise of warrants
      and 766,667 shares of common stock issuable upon exercise of options.

(13)  Includes  25,000 shares of common stock issuable upon exercise of options.
      Does not include shares of common stock that Dr. Mjalli,  as a director of
      TransTech  Pharma,  may be deemed to beneficially  own and as to which Dr.
      Mjalli disclaims beneficial ownership.

(14)  Includes  12,500  shares  issuable  upon  exercise of warrants and 100,000
      shares issuable upon exercise of options.

(15)  Dr. Rose is a director of TransTech Pharma.

(16)  Includes  88,610 shares of common stock issuable upon exercise of warrants
      and 600,000 shares of common stock issuable upon exercise of options. Does
      not  include  shares of common  stock  that Dr.  Rose,  as a  director  of
      TransTech  Pharma,  may be deemed to beneficially  own and as to which Dr.
      Rose disclaims beneficial ownership.

(17)  Includes  8,681 shares of common stock  issuable upon exercise of warrants
      and 25,000 shares issuable upon exercise of options.

(18)  Mr. Odden became our Vice  President - Business  Development  in the third
      quarter of 2004.

(19)  Includes 50,000 shares of common stock issuable upon exercise of Options.

(20)  Neither of Messrs.  Konatich  and Hruby own  shares of common  stock.  All
      shares listed as beneficially owned by each of Messrs.  Konatich and Hruby
      are shares issuable upon exercise of stock options.

(21)  Does not include  34,722  shares of common  stock  owned by Ms.  Slotkin's
      spouse to which she disclaims beneficial ownership.

(22)  See footnotes (6)-(21).


                                       22


                      Ownership of Series A Preferred Stock




Name and Address of                                                        Percentage of Series A Preferred
Beneficial Owner (1)                  Amount of Beneficial Ownership              Shares Outstanding(2)
------------------------------      -----------------------------------   ------------------------------------
                                                                                    
Frank J. and Mary Ann Loccisano                   68,038                                  100%


-----------
(1)   Unless otherwise indicated the address of each beneficial owner identified
      is 420 Lexington Avenue, Suite 408, New York, NY 10170.

(2)   Percentage  of  beneficial  ownership  of  Series  A  Preferred  Stock  is
      calculated based on the assumption that there were 68,038 shares of Series
      A Preferred Stock outstanding on March 31, 2005.


                                       23


                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

      Thomas E.  Constance,  a director of SIGA,  is  Chairman  of Kramer  Levin
Naftalis & Frankel LLP, a law firm in New York City,  which SIGA has retained to
provide legal services.

      Adnan M. Mjalli, a director of SIGA, is also President and Chief Executive
Officer of TransTech Pharma.


                                       24


                                 PROPOSAL NO. 2

                         RATIFICATION OF APPOINTMENT OF
                  INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

      The Audit  Committee of the Board of Directors  has  appointed the firm of
PricewaterhouseCoopers  LLP as SIGA's  independent  registered public accounting
firm to audit  the  financial  statements  of SIGA for the  fiscal  year  ending
December 31, 2005, and recommends  that  stockholders  vote for  ratification of
this  appointment.  PricewaterhouseCoopers  LLP  has  audited  SIGA's  financial
statements since January 1997. Representatives of PricewaterhouseCoopers LLP are
expected to be present at the Annual  Meeting and will have the  opportunity  to
make a statement  if they desire to do so, and are  expected to be  available to
respond to  appropriate  questions.  The  affirmative  vote of a majority of the
total votes cast on such  proposal  in person or by proxy at the Annual  Meeting
will be required to ratify the selection of PricewaterhouseCoopers LLP.

      If the stockholders fail to ratify the selection, the Audit Committee will
reconsider  its selection of auditors.  Even if the  selection is ratified,  the
Audit  Committee,  in its discretion,  may direct the appointment of a different
independent registered public accounting firm at any time during the year, if it
determines  that  such  change  would be in the best  interests  of SIGA and its
stockholders.

Audit Fees

      PricewaterhouseCoopers  LLP billed  SIGA  $213,300 in the  aggregate,  for
professional  services rendered by them for the audit of SIGA's annual financial
statements for the fiscal year ended  December 31, 2004,  reviews of the interim
financial statements included in SIGA's Forms 10-QSB filed during the year ended
December 31, 2004 and consents and reviews of various  documents  filed with the
SEC during the year ended December 31, 2004.

      PricewaterhouseCoopers  LLP billed  SIGA  $203,150 in the  aggregate,  for
professional  services rendered by them for the audit of SIGA's annual financial
statements  for the fiscal year ended  December 31, 2003, and the reviews of the
interim  financial  statements  included in SIGA's Forms 10-QSB filed during the
year ended December 31, 2003.

Audit Related Fees

      PricewaterhouseCoopers  LLP billed SIGA $62,700 in the aggregate for audit
and related  services  rendered with regard to its acquisition of  substantially
all the assets of Plexus Vaccine Inc.  during the fiscal year ended December 31,
2003.

      There were no Audit Related Fees in 2004.

Tax Fees

      PricewaterhouseCoopers  LLP did not render any  professional  services for
tax  compliance,  tax advice or tax planning  during  either of the fiscal years
ended December 31, 2004 or December 31, 2003.

All Other Fees

      PricewaterhouseCoopers  LLP did not  provide  any  products  or render any
professional  services  (other  than those  covered  above under  "Audit  Fees,"
"Audited  Related Fees," and "Tax Fees") during either of the fiscal years ended
December 31, 2004 or December 31, 2003.


                                       25


Policy  on Audit  Committee  Pre-Approval  of Audit  and  Permissible  Non-Audit
Services of Independent Registered Public Accounting Firm

      The Audit  Committee's  policy is to pre-approve all audit and permissible
non-audit  services  provided by the independent  registered  public  accounting
firm.  These services may include audit services,  audit-related  services,  tax
services, and other services.

      SIGA  did not  make  use in  fiscal  year  2004 of the  rule  that  waives
pre-approval  requirements  for non-audit  services in certain cases if the fees
for these services constitute less than 5% of the total fees paid to the auditor
during the year.

      THE BOARD OF DIRECTORS  RECOMMENDS  THAT THE  STOCKHOLDERS  VOTE "FOR" THE
RATIFICATION  (ITEM  2 OF  THE  ENCLOSED  PROXY  CARD)  OF  THE  APPOINTMENT  OF
PRICEWATERHOUSECOOPERS  LLP AS SIGA'S  INDEPENDENT  REGISTERED PUBLIC ACCOUNTING
FIRM FOR THE FISCAL YEAR ENDING DECEMBER 31, 2005.


                                       26


                                 PROPOSAL NO. 3

APPROVAL OF AN AMENDMENT TO THE PLAN TO INCREASE THE MAXIMUM NUMBER OF SHARES OF
COMMON STOCK  AVAILABLE FOR ISSUANCE  UNDER THE PLAN FROM  10,000,000  SHARES TO
11,000,000 SHARES

      The SIGA Technologies,  Inc. 1996 Incentive and Non-Qualified Stock Option
Plan was initially  adopted in 1996 and was subsequently  amended in 1998, 1999,
2000 and 2004 to increase the number of shares of Company  Stock with respect to
which awards may be granted thereunder.

      An aggregate of  10,000,000  shares of Common Stock have been reserved for
issuance  under the Plan.  As of  December  31,  2004,  options to  purchase  an
aggregate of 9,762,061 shares of Common Stock had been issued under the Plan. As
of December 31, 2004,  22,898 shares  remained  available for issuance under the
Plan.

      In April 2005, the Board of Directors approved an amendment to the Plan to
increase  the maximum  number of shares of Common Stock  available  for issuance
thereunder from  10,000,000  shares to 11,000,000  shares.  Such amendment shall
become effective upon approval of this Proposal No. 3 by SIGA's stockholders.

      The Board of Directors  believes  that  increasing  the maximum  number of
shares of Common Stock  available  for issuance  under the Plan from  10,000,000
shares to 11,000,000 is in the best interests of SIGA and its stockholders.  The
proposed  amendment to the Plan reflects the Board of  Directors'  determination
that  ensuring the  continued  availability  of a  sufficient  number of options
available for grant under the Plan is important to SIGA's ongoing and continuing
efforts to attract and retain key senior  management  personnel  and to increase
the interest of executive officers of SIGA in the success of SIGA's business.

      The  following  summary is  qualified  in its entirety by reference to the
Plan, a copy of which is attached hereto as Appendix A.

Description of the Plan

      The  purposes  of the Plan are to attract  and  retain the best  available
personnel,  to provide an additional incentive to SIGA's employees,  consultants
and non-employee directors and to promote the success of SIGA's business.

      The Plan provides that it is to be administered  by a committee  appointed
by the Board of  Directors,  comprised of  "non-employee  directors"  within the
meaning of Rule 16b-3 under the  Securities  Exchange  Act of 1934 and  "outside
directors"  within  the  meaning  of  Section  162(m) of the Code.  The Board of
Directors  has  appointed the  Compensation  Committee to  administer  the Plan.
However,  with respect to the non-employee members of the Board of Directors and
any individuals that are not reasonably expected to be "covered employees" under
Section 162(m) of the Code or in any other situation that the Board of Directors
elects, the entire Board of Directors may act as the Compensation Committee. The
Compensation  Committee designates the persons to receive options, the number of
shares  subject  to each  option  and the terms of the  options,  including  the
option's price and period of exercisability,  subject to certain limitations and
as permitted by the Plan.

      The  maximum  number of shares of Common  Stock  currently  available  for
issuance under the Plan is 10,000,000 shares, subject to adjustment in the event
of stock splits, stock dividends,  mergers,  consolidations and the like. Shares
of Common  Stock  subject  to  options  granted  under  the Plan that  expire or
terminate are available for options to be issued under the Plan.

      Eligibility

      Options may be granted to (i) officers and salaried  employees of SIGA and
its  subsidiaries  (including  salaried  employees  who are also  directors  and
prospective   salaried   employees   conditioned  on  their  becoming   salaried
employees),  (ii) members of the Board of Directors,  (iii) such  consultants to
SIGA as the Compensation  Committee shall select in its sole discretion and (iv)
any other key persons,  as determined by the Compensation  Committee in its sole
discretion.  For this purpose,  an employee  means an  individual  who is (or is
expected  to be)  classified  as an  employee  of SIGA for  purposes  of  SIGA's
payroll. The granting of Options is discretionary, and SIGA cannot


                                       27


determine  the number or type of  Options  that will be granted in the future to
any particular  person or group. The Plan provides that  non-employee  directors
may be granted options in the discretion of the Board of Directors.

      Options

      The Plan  provides  for the grant of (i) stock  options  not  intended  to
qualify as incentive stock options within the meaning of Section 422 of the Code
("NQSOs") and (ii) stock options that are intended to qualify as incentive stock
options  within the meaning of Section 422 of the Code ("ISOs" and together with
NQSOs, the "Options").  Each Option shall be evidenced by an "Option  Agreement"
containing  such  terms  and  conditions  as the  Compensation  Committee  shall
determine.

      Non-Qualified  Stock Options.  The exercise  price-per-share  of each NQSO
shall be  determined  by the  Compensation  Committee on the date of grant,  but
shall not be less than that  required by law.  Each Option  Agreement  shall set
forth the vesting schedule for the Option.  Unless the Option Agreement provides
for  pre-vesting  exercise,  as  described  below,  an NQSO first  shall  become
exercisable  when,  and to the  extent  that,  it is  vested,  and shall  remain
exercisable  until the tenth  anniversary of the date the NQSO was granted.  The
exercise  price  shall  be paid in cash or,  unless  provided  otherwise  in the
applicable  Option  Agreement,  in shares of Common  Stock  valued at their fair
market value on the date of exercise or by means of a cashless exercise in which
some or all of the shares to be granted  upon the  exercise  are sold to provide
the exercise price, or, at the discretion of the Compensation Committee, by such
other provision as the  Compensation  Committee may from time to time prescribe.
In addition,  SIGA, in its sole  discretion,  may lend, with full recourse,  the
exercise price to the  participant or guarantee a loan from a third party to the
participant.

      The following  treatment  applies to NQSOs in the event of a participant's
termination of employment,  unless the Option Agreement provides  otherwise:  To
the extent that the option was not  exercisable at the time of  termination,  it
shall expire at the close of business (the  commencement of business in the case
of a termination  for Cause, as defined in the Plan) on the date of termination.
To the extent that the option was  exercisable  at the time of  termination,  it
shall expire on the earlier of the  expiration of its term and (i) 90 days after
the  termination of  employment,  if the  termination  was any reason other than
"Cause,"  "Disability" (as defined in the Plan) or death and (ii) one year after
the  termination of employment if the termination was by reason of Disability or
death.  In the case of a termination of employment  for Cause,  the option shall
expire  as of  the  commencement  of  business  of  the  effective  date  of the
termination.

      Incentive  Stock Options.  Generally,  ISOs are options that may provide a
participant with certain federal income tax benefits that are not available with
NQSOs,  provided that the participant holds the shares acquired upon exercise of
the ISO for at least two years  after the date the ISO is  granted  and at least
one year after the exercise date. The rules for ISOs under the Plan are the same
as with respect to NQSOs, except as follows:

                  1. ISOs may only be granted to employees.

                  2. The exercise  price-per-share  of each ISO must be at least
                  the fair market  value of a share of Common  Stock on the date
                  on which such ISO is granted.

                  3. An ISO granted to any individual who owns stock  possessing
                  more than ten percent of the total  combined  voting  power of
                  all  classes  of stock  of SIGA is  subject  to the  following
                  additional  limitations:  (i) the exercise  price-per-share of
                  the ISO must be at least  110% of the fair  market  value of a
                  share of Common  Stock at the time any such ISO is granted and
                  (ii) the ISO cannot be  exercisable  after the  expiration  of
                  five years from the grant date.

                  4. The aggregate  fair market value  (determined  on the grant
                  date) of shares of Common Stock with respect to which ISOs are
                  exercisable  for the first  time by a  participant  during any
                  calendar  year under the Plan or any other plan of SIGA or its
                  subsidiaries may not exceed $100,000.

      Reload  Options.  The Plan  provides  that in certain  circumstances,  the
Compensation  Committee may include in an Option Agreement  evidencing an option
(the "Original Option") a provision that a "reload option" shall be


                                       28


granted to the participant if such  participant  delivers shares of Common Stock
in partial or full payment of the exercise  price of the  Original  Option.  The
reload  option  will  relate to a number of shares of Common  Stock equal to the
number  of  shares  of  Common  Stock  delivered,  and  will  have  an  exercise
price-per-share equal to the fair market value of a share of Common Stock on the
date of the exercise of the Original Option.

      Pre-Vesting Exercise.  The Plan provides that the Compensation  Committee,
in an Option  Agreement,  may permit a  participant  to  exercise an ISO or NQSO
before it is vested.  The shares of Common Stock that the  participant  receives
upon such  pre-vesting  exercise  will be subject to certain  restrictions.  The
participant may not transfer the shares until they vest and if the participant's
employment  with SIGA  terminates  for any reason,  any unvested  shares will be
forfeited and SIGA will repay the exercise price to the participant.

      Transferability of Options

      Options  granted under the Plan are exercisable  during the  participant's
lifetime only by the  participant and are not  transferable by the  participant,
other than by will or the laws of descent and distribution.

      Forfeiture of Gain in Certain Events

      The Plan provides  that if, within one year after a participant  exercises
an Option, the Compensation Committee determines in its discretion that SIGA has
been materially harmed by the participant,  whether such harm (a) results in the
participant's  termination  of  employment  for  Cause or (b)  results  from any
activity of the participant  determined by the  Compensation  Committee to be in
competition  with any  activity  of SIGA,  or  otherwise  inimical,  contrary or
harmful to SIGA's interests (including, but not limited to, accepting employment
with or serving as a consultant,  adviser or in any other  capacity to an entity
that is in competition with or acting against SIGA's  interests),  then any gain
realized by the  participant  from the exercise shall be paid by the participant
to SIGA upon notice from SIGA.  Such gain shall be  determined as of the date of
exercise,  without regard to any subsequent change in the Fair Market Value of a
share of Company  Stock.  SIGA shall have the right to offset such gain  against
any  amounts  otherwise  owed to the  participant  by SIGA  (whether  as  wages,
vacation   pay,  or  pursuant  to  any  benefit   plan  or  other   compensatory
arrangement).

      Certain Corporate Changes

      The Plan  provides  for an  adjustment  in the  number of shares of Common
Stock  available  to be issued under the Plan and the number of shares of Common
Stock  subject to  existing  options  upon any change in SIGA's  capitalization,
stock dividend or split, reverse stock split, merger, consolidation, combination
or exchange of shares and certain other similar events.

      Amendment and Termination

      The Board of Directors may suspend, discontinue,  revise or amend the Plan
at any time and in any respect,  subject to  stockholder  approval to the extent
necessary to comply with applicable law and listing requirements.  Generally, no
amendment to the Plan may reduce a  participant's  rights  under any  previously
granted Option without the participant's prior written consent.

      Limitations Imposed by Section 162(m)

      If and to the  extent  that the  Compensation  Committee  determines  that
SIGA's  federal tax deduction in respect of an Option may be limited as a result
of Section 162(m) of the Code, the Compensation  Committee may delay payments to
the participant  with respect to the option and, in exchange,  the  Compensation
Committee  shall  credit to an account  on the books and  records of SIGA a cash
amount equal to the fair market  value of the shares of Common Stock  subject to
such option (a "Book Account"). The amounts credited to the Book Account will be
paid to the participant  within thirty days after the date the compensation paid
to the  participant  no longer is  subject  to the  deduction  limitation  under
Section 162(m) of the Code.


                                       29


      Summary of Federal Tax Consequences

      The following description of the principal federal income tax consequences
of Options under the Plan is based on present federal tax laws. Federal tax laws
may  change  from time to time and any  legislation  that may be  enacted in the
future by the United States Congress may significantly affect the federal income
tax consequences  described below. No representation is or can be made regarding
whether  any such  legislation  will or may be enacted  and/or the impact of any
such  legislation.  The  description  below  does not  purport  to be a complete
description  of the tax  consequences  associated  with  Options  under the Plan
applicable to any particular award recipient.  Differences in each  individual's
financial  situation  may cause  federal,  state and local tax  consequences  of
awards to vary.

      Non-Qualified Stock Options. In general, an optionee will not be deemed to
receive any income at the time an NQSO is granted,  nor will SIGA be entitled to
a federal tax deduction at that time.

      When an optionee exercises an NQSO, other than a pre-vesting exercise, the
optionee will recognize ordinary  compensation income equal to the excess of (a)
the fair market  value on the exercise  date of the Common  Stock  received as a
result of such exercise  over (b) the option  exercise  price,  and SIGA will be
entitled to a tax deduction in that amount.  The shares acquired by the optionee
upon  exercise of the NQSO will have a tax basis equal to the fair market  value
of the shares on the exercise date. Upon any subsequent sale of the Common Stock
received on exercise of the NQSO, the optionee will recognize a capital gain (or
loss) in an amount equal to the  difference  between the amount  realized on the
sale and such tax  basis.  Any such  gain (or  loss)  will be  characterized  as
long-term  capital gain (or loss) if the shares have been held for more than one
year;  otherwise,  the gain (or  loss)  will be  characterized  as a  short-term
capital gain (or loss).  An  optionee's  holding  period for federal  income tax
purposes  for  such  shares  will  commence  on the date  following  the date of
exercise.  Short-term  capital  gain is  subject  to tax at the same  rate as is
ordinary income. Under current law, the rate at which net long-term capital gain
will be taxed will vary depending on how long the optionee held the Shares after
exercising  the option.  The Code currently  provides that, in general,  the net
long-term  capital gain  resulting from the sale of shares held for more than 12
months is subject to tax at a maximum rate of 15% (5% for individuals in the 10%
or 15% tax  bracket).  The  Code  currently  provides  that  the tax rate on net
long-term  capital gain will change in future years:  The 15% rate will increase
to 20% in 2009 and the 5% rate will  decrease to 0% in 2008 and then increase to
10% in 2009.

      If all or any  part  of the  exercise  price  of an  NQSO  is  paid by the
optionee with shares of Common Stock (including, based upon proposed regulations
under the Code, shares previously  acquired upon exercise of an ISO), no gain or
loss will be  recognized by the optionee on the shares  surrendered  in payment.
The number of shares  received on such  exercise of the NQSO equal to the number
of shares  surrendered  will have the same tax basis  and  holding  period,  for
purposes of determining  whether subsequent  dispositions result in long-term or
short-term  capital gain or loss and the applicable tax rates,  as the basis and
holding period of the shares surrendered.  The balance of the shares received on
such  exercise  will be treated for federal  income tax purposes as described in
the  preceding  paragraph as though  issued upon the exercise of the NQSO for an
exercise price equal to the consideration, if any, paid by the optionee in cash.
The optionee's  compensation taxable as ordinary income upon such exercise,  and
SIGA's deduction,  will not be affected by whether the exercise price is paid in
cash or in shares of Common Stock.

      Pre-Vesting  Exercise of an NQSO. If an optionee  exercises an NQSO before
it is  vested,  the  optionee  will not  recognize  any income and SIGA will not
receive a tax deduction until such time as the shares are no longer subject to a
substantial risk of forfeiture or restrictions on  transferability  (unless,  as
described  below, the recipient elects otherwise under Section 83(b) of the Code
within  30  days  of the  date of  exercise).  Upon  lapse  or  release  of such
restrictions  (i.e., when the shares vest), the optionee  generally will include
in gross  income an amount  equal to the fair market  value of the shares at the
time they  vested,  less the  exercise  price  paid for  them,  and SIGA will be
entitled to a tax deduction in the same amount.  The optionee's tax basis in the
shares  will equal their fair market  value on the date the shares  vested.  Any
gain or loss upon a  subsequent  disposition  of the  shares  will be  long-term
capital gain or loss if the shares are held for more than one year and otherwise
will be short-term  capital gain or loss. The federal tax rate applicable to any
long-term  capital  gain will depend upon the holding  period of the shares,  as
described above.

      Pursuant to Section 83(b) of the Code, an optionee who exercises an option
before  it is  vested  may,  within  30 days of  exercise,  elect to be taxed at
ordinary  income tax rates on the fair  market  value at the time of exercise of
the Common Stock acquired through the pre-vesting  exercise.  If the election is
made, the optionee will acquire a tax


                                       30


basis in the shares equal to the ordinary  income  recognized by the optionee at
the time of award plus any amount paid for the shares, and SIGA will be entitled
to a deduction in an amount equal to the amount of ordinary income recognized by
the  optionee.  No  income  will be  recognized  upon  lapse or  release  of the
restrictions.  Any gain or loss upon a subsequent disposition of the shares will
be long-term  capital gain or loss if the shares are held for more than one year
and  otherwise  will be  short-term  capital gain or loss.  The federal tax rate
applicable to any long-term  capital gain will depend upon the holding period of
the shares.  In the event of a forfeiture of the shares with respect to which an
optionee  previously  made a Section  83(b)  election,  the optionee will not be
entitled  to a loss  deduction,  unless the amount the  optionee  received  upon
forfeiture  was less than the exercise  price the optionee  previously  paid for
such stock.

      Incentive  Stock  Options.  In general,  an optionee will not be deemed to
receive any income at the time an ISO is granted or  exercised  if the  optionee
does not dispose of the shares  acquired on exercise of the ISO within two years
after the grant of the ISO and one year after the exercise of the ISO (discussed
more  fully  in the  next  paragraph).  In such a case,  the  gain (if any) on a
subsequent  sale (the excess of the amount  received over the exercise price) or
loss (if any) on a subsequent  sale (the excess of the  exercise  price over the
amount received) will be a long-term capital gain or loss and will be subject to
tax based on the holding period of the shares, as described in the discussion of
NQSOs above.  However,  for purposes of computing the "alternative  minimum tax"
applicable  to  an  optionee,  the  optionee  will  include  in  the  optionee's
alternative  minimum  taxable income the amount the optionee would have included
in income if the ISO were an NQSO.  Such amount may be subject to an alternative
minimum tax of 26% or 28%. Similarly, for purposes of making alternative minimum
tax calculations,  the optionee's basis in the stock received on the exercise of
an ISO will be determined as if the ISO were an NQSO.

      If an optionee sells the shares  acquired on exercise of an ISO within two
years  after the date of grant of the ISO or within one year after the  exercise
of the ISO, the disposition is a "disqualifying  disposition,"  and the optionee
will recognize income in the year of the disqualifying  disposition equal to the
excess of the amount  received for the shares over the exercise  price.  Of that
income,  the portion  equal to the excess of the fair market value of the shares
at the time the ISO was  exercised  over the  exercise  price will be treated as
compensation to the optionee,  taxable as ordinary  income,  and the balance (if
any) will be long- or short- term capital  gain  depending on whether the shares
were sold more than one year after the ISO was  exercised.  If the  shares  were
acquired  through a  pre-vesting  exercise of the ISO, the portion of the income
that is treated as compensation to the optionee,  taxable as ordinary income, is
the excess of the fair  market  value of the shares at the time they vested over
the exercise price and the balance (if any) will be long- or short-term  capital
gain. The federal tax rate applicable to any long-term  capital gain will depend
upon the holding period of the shares, as described above. If the optionee sells
the shares in a disqualifying  disposition at a price that is below the exercise
price,  the loss will be a short-term  capital loss if the optionee has held the
shares for one year or less and otherwise will be a long-term capital loss.

      If an  optionee  uses  shares  acquired  upon  the  exercise  of an ISO to
exercise an ISO, and the sale of the shares so surrendered  for cash on the date
of surrender  would be a  disqualifying  disposition of such shares,  the use of
such shares also would  constitute a  disqualifying  disposition.  In such case,
proposed  regulations under the Code appear to provide that the tax consequences
described above with respect to disqualifying  dispositions would apply,  except
that no capital  gain would be  recognized  with  respect to such  disqualifying
disposition. In addition, the basis of the surrendered shares would be allocated
to the shares  acquired upon exercise of the ISO, and the holding  period of the
shares so  acquired  would be  determined,  in a manner  prescribed  in proposed
regulations under the Code.

      SIGA is not  entitled to a deduction  as a result of the grant or exercise
of an ISO. If the  optionee  has  compensation  taxable as ordinary  income as a
result of a disqualifying  disposition,  SIGA will be entitled to a deduction in
an amount equal to the  compensation  income  resulting  from the  disqualifying
disposition in the taxable year of SIGA in which the  disqualifying  disposition
occurs.

      Deduction  Limit under  Section  162(m) of the Code.  In general,  Section
162(m)  of the Code (the  "Million-Dollar  Limit")  provides  that,  subject  to
certain exceptions, remuneration in excess of $1 million that is paid to certain
"covered employees" of a publicly held corporation (generally, the corporation's
Chief  Executive  Officer and its four most highly  compensated  employees other
than the Chief  Executive  Officer) will not be  deductible by the  corporation.
Grants  of  options   generally  will  be  eligible  for  an  exception  to  the
Million-Dollar   Limit  applicable  to  certain   qualified   "performance-based
compensation." In addition, the Plan permits the Compensation Committee to defer
payments  to covered  employees  until such  individuals  are no longer  covered
employees with respect to the


                                       31


Section 162(m) limitations.  Consequently, it would appear that SIGA's deduction
for such amounts would be preserved.

      Withholding  of Taxes.  Whenever a  participant  is required to  recognize
compensation  income  taxable as ordinary  income in connection  with an Option,
SIGA may be obligated to withhold amounts for the payment of federal,  state and
local taxes.  SIGA may withhold (i) an amount in cash  sufficient to satisfy its
withholding  obligations  (when the income is recognized  through the receipt of
cash) or (ii) a number of shares,  the fair market value of which is  sufficient
to satisfy such withholding  requirements.  Additionally,  SIGA may require that
the  participant  remit to SIGA an amount in cash  sufficient to satisfy  SIGA's
withholding  obligations.  At the election of the participant and subject to the
approval of the  Compensation  Committee,  the  participant may satisfy any such
withholding  obligations by remitting to SIGA shares of Common Stock with a fair
market value sufficient to satisfy the withholding obligations.

      Other Tax Matters. Tax consequences different from or in addition to those
described  above may result in the event of an exercise  of an option  after the
termination  of a  participant's  employment  by reason of death.  In  addition,
various state laws may provide for tax consequences that vary significantly from
those described above.



--------------------------------------------------------------------------------------------
                                  New Plan Benefits (1)
--------------------------------------------------------------------------------------------
Name and Position                 Additional Stock Options Granted      Dollar Value ($)
-----------------                 --------------------------------      ----------------
----------------------------------------------------------------------- --------------------
                                                                  
Non-Executive Director Group      90,000 (2)                            105,300 (3)
----------------------------------------------------------------------- --------------------


(1)   All other future benefits under the Plan will be made at the discretion of
      SIGA's Compensation  Committee and,  accordingly,  are not determinable at
      this time.

(2)   The option grants  reflected in the table above will be made in accordance
      with SIGA's previously disclosed Director Compensation Program.

(3)   Current market price on the April 25, 2005.

   THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR" THE APPROVAL (ITEM 3 OF THE
ENCLOSED PROXY CARD) OF THE AMENDMENT TO THE PLAN TO INCREASE THE MAXIMUM NUMBER
OF SHARES OF COMMON STOCK AVAILABLE FOR ISSUANCE UNDER THE PLAN FROM 10,000,000
                          SHARES TO 11,000,000 SHARES.


                                       32


                              STOCKHOLDER PROPOSALS

      Stockholder  proposals  to be  presented  at the 2006  Annual  Meeting  of
Stockholders, for inclusion in SIGA's proxy statement and form of proxy relating
to that meeting,  must be received by SIGA at its offices in New York, New York,
addressed to the Secretary,  not later than January 2, 2006. Such proposals must
comply  with  SIGA's  By-Laws  and the  requirements  of  Regulation  14A of the
Securities Exchange Act of 1934 (the "Exchange Act").

      In  addition,  Rule 14a-4 of the  Exchange  Act governs  SIGA's use of its
discretionary proxy voting authority with respect to a stockholder proposal that
is not  addressed  in the proxy  statement.  With  respect to SIGA's 2006 Annual
Meeting  of  Stockholders,  if  SIGA is not  provided  notice  of a  stockholder
proposal prior to March 17, 2006, SIGA will be allowed to use its  discretionary
voting  authority  when the  proposal  is raised  at the  meeting,  without  any
discussion of the matter in the proxy statement.

                              SECTION 16 BENEFICIAL
                         OWNERSHIP REPORTING COMPLIANCE

      Section 16(a) of the Exchange Act requires  SIGA's officers and directors,
and persons who own more than ten percent of a registered class of SIGA's equity
securities,  to file  reports of  ownership  and changes in  ownership  with the
Securities  and  Exchange  Commission.  Officers,  directors  and  greater  than
ten-percent  stockholders  are required by  Securities  and Exchange  Commission
regulation  to furnish SIGA with copies of all Section  16(a)  reports that they
file.

      Based solely upon review of the copies of such  reports  furnished to SIGA
and  written  representations  from  certain of SIGA's  executive  officers  and
directors  that no other such reports were  required,  SIGA believes that during
the fiscal year ended  December  31,  2004,  each of the  following  individuals
failed to file on a timely  basis one  report  relating  to one  transaction  as
required by Section 16 of the Exchange Act:  Bernard L. Kasten Jr. M.D.,  Thomas
N. Konatich,  Dennis E. Hruby,  Ph.D.,  John R. Odden,  James J. Antal,  Judy S.
Slotkin,   Adnan  M.  Mjalli,  Ph.D.,  and  Paul  G.  Savas.  All  reports  were
subsequently filed.

           AVAILABILITY OF ANNUAL REPORT AND FORM 10-K TO STOCKHOLDERS

      SIGA's Annual Report to Stockholders  for the year ended December 31, 2004
accompanies  this proxy statement.  SIGA will provide to any  stockholder,  upon
written  request and without  charge,  a copy of its most recent  Report on Form
10-K,  including  the financial  statements,  as filed with the  Securities  and
Exchange  Commission.  All requests  for such reports  should be directed to the
Chief Financial  Officer,  420 Lexington  Avenue,  Suite 408, New York, New York
10170, telephone number (212) 672-9100.

                                  OTHER MATTERS

      At the date of this  proxy  statement,  management  was not aware that any
matters not referred to in this proxy statement would be presented for action at
the Annual Meeting.  If any other matters should come before the Annual Meeting,
the persons named in the accompanying proxy will have discretionary authority to
vote all  proxies  in  accordance  with their best  judgment,  unless  otherwise
restricted by law.

                                   BY ORDER OF THE BOARD OF DIRECTORS


                                   /s/ Thomas N. Konatich
                                   ---------------------------
                                   Thomas N. Konatich
                                   Secretary

Dated:  May 2, 2005


                                       33


                             SIGA TECHNOLOGIES, INC.
                    PROXY SOLICITED BY THE BOARD OF DIRECTORS
                     FOR THE ANNUAL MEETING OF STOCKHOLDERS
                           TO BE HELD ON MAY 26, 2005

      The undersigned  hereby appoints Bernard L. Kasten and Thomas N. Konatich,
and each of them, as attorneys and proxies of the  undersigned,  with full power
of substitution,  to vote all of the shares of stock of SIGA Technologies,  Inc.
which  the  undersigned  may be  entitled  to  vote  at the  Annual  Meeting  of
Stockholders  of SIGA  Technologies,  Inc.  to be held at the  offices of Kramer
Levin Naftalis & Frankel LLP, 1177 Avenue of the Americas, 29th floor, New York,
New York 10036, on Thursday, May 26, 2005 at 10:30 a.m. (local time), and at any
and all postponements,  continuations and adjournments  thereof, with all powers
that the undersigned would possess if personally present, upon and in respect of
the following  matters and in accordance with the following  instructions,  with
discretionary  authority as to any and all other  matters that may properly come
before the meeting.

UNLESS A  CONTRARY  DIRECTION  IS  INDICATED,  THIS  PROXY WILL BE VOTED FOR ALL
NOMINEES  LISTED IN PROPOSAL NO. 1, FOR THE SELECTION OF  PRICEWATERHOUSECOOPERS
LLP AS THE INDEPENDENT  REGISTERED PUBLIC ACCOUNTING FIRM OF SIGA  TECHNOLOGIES,
INC. FOR THE FISCAL YEAR ENDING  DECEMBER 31, 2005,  AND FOR THE APPROVAL OF THE
AMENDMENT TO THE PLAN TO INCREASE  THE MAXIMUM  NUMBER OF SHARES OF COMMON STOCK
AVAILABLE  FOR  ISSUANCE  UNDER THE PLAN FROM  10,000,000  SHARES TO  11,000,000
SHARES.  AS MORE  SPECIFICALLY  DESCRIBED  IN THE PROXY  STATEMENT.  IF SPECIFIC
INSTRUCTIONS ARE INDICATED, THIS PROXY WILL BE VOTED IN ACCORDANCE THEREWITH.

THE BOARD OF  DIRECTORS  RECOMMENDS A VOTE "FOR" THE  DIRECTOR  NOMINEES  LISTED
BELOW,  "FOR" THE  SELECTION OF  PRICEWATERHOUSECOOPERS  LLP AS THE  INDEPENDENT
REGISTERED PUBLIC ACCOUNTING FIRM OF SIGA TECHNOLOGIES, INC. FOR THE FISCAL YEAR
ENDING  DECEMBER 31, 2005 AND "FOR" THE APPROVAL OF THE AMENDMENT TO THE PLAN TO
INCREASE  THE MAXIMUM  NUMBER OF SHARES OF COMMON STOCK  AVAILABLE  FOR ISSUANCE
UNDER THE PLAN FROM 10,000,000 SHARES TO 11,000,000 SHARES.

PLEASE VOTE,  SIGN,  DATE AND RETURN PROMPTLY IN THE ENCLOSED  ENVELOPE.  PLEASE
MARK YOUR VOTE IN BLUE OR BLACK INK AS SHOWN HERE: |X|

1.    To elect ten directors.

      |_|   FOR ALL NOMINEES

      |_|   WITHHOLD AUTHORITY FOR ALL NOMINEES

      |_|   FOR ALL EXCEPT (See instructions below)

      NOMINEES:   |_|   Donald G. Drapkin

                  |_|   Bernard L. Kasten Jr. M.D.

                  |_|   Thomas E. Constance

                  |_|   Adnan M. Mjalli, Ph.D.

                  |_|   Mehmet C. Oz, M.D.



                  |_|   Eric A. Rose, M.D.

                  |_|   Paul G. Savas

                  |_|   Michael A. Weiner, M.D.

                  |_|   Judy S. Slotkin

                  |_|   James J. Antal

      INSTRUCTION:  To withhold authority to vote for any individual nominee(s),
      mark "FOR ALL EXCEPT" and fill in circle next to each  nominee you wish to
      withhold, as shown here: |X|

2.    To ratify the selection of  PricewaterhouseCoopers  LLP as the independent
      registered  public  accounting  firm of SIGA  Technologies,  Inc.  for the
      fiscal year ending December 31, 2005.

      |_|   FOR                     |_|   AGAINST                 |_|   ABSTAIN

3.    To  approve  an  amendment  to the SIGA  Technologies,  Inc.  Amended  and
      Restated 1996 Incentive and  Non-Qualified  Stock Option Plan (the "Plan")
      to increase  the maximum  number of shares of Common Stock  available  for
      issuance under the Plan from 10,000,000 shares to 11,000,000 shares.

      |_|   FOR                     |_|   AGAINST                 |_|   ABSTAIN

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF  DIRECTORS.  IT MAY BE REVOKED
PRIOR TO ITS EXERCISE.

RECEIPT  OF  NOTICE  OF  THE  ANNUAL  MEETING  AND  PROXY  STATEMENT  IS  HEREBY
ACKNOWLEDGED,  AND THE  TERMS OF THE  NOTICE  AND  PROXY  STATEMENT  ARE  HEREBY
INCORPORATED BY REFERENCE INTO THIS PROXY.  THE  UNDERSIGNED  HEREBY REVOKES ALL
PROXIES  HERETOFORE  GIVEN  FOR  SAID  MEETING  OR  ANY  AND  ALL  ADJOURNMENTS,
POSTPONEMENTS AND CONTINUATIONS THEREOF.

PLEASE VOTE,  DATE,  SIGN AND PROMPTLY  RETURN THIS PROXY IN THE ENCLOSED RETURN
ENVELOPE WHICH IS POSTAGE PREPAID IF MAILED IN THE UNITED STATES.

------------------------------------------------------------------

To  change  the  address  on your  account,  please  check  the box at right and
indicate your new address in the address space above. Please note that changes
to   the  registered  name(s)  on the   account  may not  be submitted  via this
method. |_|


Signature of Stockholder: ______________________________________________________
Date: ________________


Signature of Stockholder: ______________________________________________________
Date: ________________

PLEASE SIGN  EXACTLY AS YOUR NAME  APPEARS ON THIS PROXY.  WHERE SHARES ARE HELD
JOINTLY,  EACH HOLDER  SHOULD SIGN.  WHEN  SIGNING AS  EXECUTOR,  ADMINISTRATOR,
ATTORNEY-IN-FACT, TRUSTEE OR GUARDIAN, PLEASE GIVE FULL TITLE AS SUCH. IF SIGNER
IS A CORPORATION, PLEASE SIGN IN FULL CORPORATE NAME BY DULY AUTHORIZED OFFICER,
GIVING  FULL  TITLE AS SUCH.  IF SIGNER IS A  PARTNERSHIP,  PLEASE  SIGN IN FULL
PARTNERSHIP NAME BY AUTHORIZED PERSON.


                                      -2-


                                                                      APPENDIX A

                             SIGA Technologies, Inc.

     Amended and Restated 1996 Incentive and Non-Qualified Stock Option Plan

The Plan

      The SIGA Technologies, Inc. 1996 Incentive and Non-Qualified Stock Option
      Plan (the "Plan") was initially adopted in 1996. The Plan subsequently was
      amended in 1998, 1999 and 2000 to increase the number of shares of Company
      Stock with respect to which awards may be granted under the Plan. The Plan
      was amended and restated in its entirety and renamed the SIGA
      Technologies, Inc. Amended and Restated 1996 Incentive and Non-Qualified
      Stock Option Plan on May 3, 2001, by the Board of Directors, subject to
      approval by the stockholders of the Company. The Plan is hereby further
      amended and restated, subject to stockholder approval. The terms of the
      Plan, as amended and restated, shall apply to all Options granted after
      the effective date set forth in Section 24 hereof. The purposes of the
      Plan are to attract and retain the best available personnel, to provide an
      additional incentive to the employees, consultants and non-employee
      directors of SIGA Technologies, Inc., a Delaware corporation (the
      "Company"), and to promote the success of the Company's business.

1.    Definitions

            As used in the Plan, the following definitions apply to the terms
            indicated below:

            (a)   "Affiliate" shall mean an entity (whether or not
                  incorporated), controlling, controlled by or under common
                  control with the Company.

            (b)   "Board of Directors" shall mean the Board of Directors of SIGA
                  Technologies, Inc.

            (c)   "Cause"  shall have the  meaning  set forth in any  employment
                  agreement between the Participant and the Company in effect as
                  of the date the event  giving rise to cause  occurred.  In the
                  absence of such an  employment  agreement  provision,  "Cause"
                  shall  mean:  (a) the  Participant's  conviction  of any crime
                  (whether or not involving the Company)  constituting  a felony
                  in the jurisdiction  involved;  (b) conduct of the Participant
                  related  to the  Participant's  employment  for  which  either
                  criminal or civil  penalties  against the  Participant  or the
                  Company may be sought; (c) material violation of the Company's
                  policies,  including,  without  limitation,  those relating to
                  sexual  harassment,  the disclosure or misuse of  confidential
                  information,   or  those  set  forth  in  Company  manuals  or
                  statements of policy; (d) serious neglect or misconduct in the
                  performance  of the  Participant's  duties for the  Company or
                  willful or repeated failure or refusal to perform such duties;
                  or (e) any material  violation by the Participant of the terms
                  of any  agreement  between the  Participant  and the  Company,
                  including,    without    limitation,    any    employment   or
                  non-competition  agreement.  Any rights the  Company  may have
                  hereunder in respect of the events  giving rise to Cause shall
                  be in  addition  to the rights the  Company may have under any
                  other agreement with a Participant or at law or in equity. Any
                  determination of whether a Participant's  employment is (or is
                  deemed to have been) terminated for Cause shall be made by the
                  Committee in its sole discretion, which determination shall be
                  final  and  binding  on  all  parties.  If,  subsequent  to  a
                  Participant's  termination of employment (whether voluntary or
                  involuntary)   without  Cause,   it  is  discovered  that  the
                  Participant's employment could have been terminated for Cause,
                  such  Participant's  employment  shall be  deemed to have been
                  terminated   for  Cause.   A   Participant's   termination  of
                  employment  for Cause shall be effective as of the date of the
                  occurrence  of the event giving rise to Cause,  regardless  of
                  when the determination of Cause is made.

            (d)   "Code" shall mean the Internal Revenue Code of 1986, as
                  amended.

            (e)   "Committee" shall mean the Committee appointed by the Board of
                  Directors to administer the Plan; provided, however, that the
                  Committee shall at all times consist of two or more persons,
                  all


                                       A-1


                  of whom are "non-employee directors" within the meaning of
                  Rule 16b-3 under the Exchange Act and "outside directors"
                  within the meaning of Section 162(m) of the Code. With respect
                  to any matters relating to the grant of Options to
                  non-employee members of the Board of Directors or to
                  individuals who are not reasonably expected to be "covered
                  employees" within the meaning of Section 162(m) of the Code at
                  the time the Option is exercised, the Committee may be the
                  entire Board of Directors.

            (f)   "Company" shall mean SIGA Technologies, Inc. or any successor
                  thereto. References to the Company also shall include the
                  Company's Affiliates unless the context clearly indicates
                  otherwise.

            (g)   "Company Stock" shall mean the common stock of the Company,
                  par value $0.000l per share.

            (h)   "Disability" shall mean a disability described in Section
                  422(c)(6) of the Code. The existence of a Disability shall be
                  determined by the Committee in its absolute discretion.

            (i)   "Exchange Act" shall mean the Securities Exchange Act of 1934,
                  as amended from time to time.

            (j)   "Fair Market Value" shall mean, with respect to a share of
                  Company Stock on an applicable date:

            (i)   If the principal  market for the Company Stock (the  "Market")
                  is a national securities exchange or the National  Association
                  of Securities  Dealers  Automated  Quotation System ("NASDAQ")
                  National Market,  the last sale price or, if no reported sales
                  take place on the applicable date, the average of the high bid
                  and low asked  price of  Company  Stock as  reported  for such
                  Market on such date or, if no such  quotation  is made on such
                  date,   on  the  next   preceding  day  on  which  there  were
                  quotations, provided that such quotations shall have been made
                  within the ten (10)  business days  preceding  the  applicable
                  date;  (ii) If the Market is the  NASDAQ  National  List,  the
                  NASDAQ Supplemental List or another market, the average of the
                  high  bid  and  low  asked  price  for  Company  Stock  on the
                  applicable  date,  or, if no such  quotations  shall have been
                  made on such date,  on the next  preceding  day on which there
                  were quotations, provided that such quotations shall have been
                  made  within  the  ten  (10)  business   days   preceding  the
                  applicable date; or, (iii) In the event that neither paragraph
                  (i) nor (ii) shall apply,  the Fair Market Value of a share of
                  Company  Stock on any day shall be determined in good faith by
                  the Committee in a manner consistently applied.

            (k)   "Incentive Stock Option" shall mean an Option that is an
                  "incentive stock option" within the meaning of Section 422 of
                  the Code and that is identified as an Incentive Stock Option
                  in the applicable Option Agreement.

            (l)   "Non-Qualified Stock Option" shall mean an Option that is not
                  an Incentive Stock Option

            (m)   "Option" shall mean an option to purchase shares of Company
                  Stock (whether an Incentive Stock Option or a Non-Qualified
                  Stock Option) that is granted pursuant to the Plan.

            (n)   "Option Agreement" shall mean an agreement, in such form and
                  including such terms as the Committee in its sole discretion
                  shall determine, evidencing an Option.

            (o)   "Participant" shall mean an individual who is eligible to
                  participate in the Plan pursuant to Section 5 hereof and to
                  whom an Option is granted pursuant to the Plan, and, upon his
                  or her death, the individual's successors, heirs, executors
                  and administrators, as the case may be.

            (p)   "Plan" shall mean this SIGA Technologies, Inc. Amended and
                  Restated 1996 Incentive and Non-Qualified Stock Option Plan,
                  as it may be amended from time to time. Prior to the effective
                  date hereof, the Plan was referred to as the SIGA
                  Technologies, Inc. 1996 Incentive and Non-Qualified Stock
                  Option Plan and the SIGA Corporation 1996 Stock Option Plan.


                                       A-2


            (q)   "Reload Option" shall mean an Option granted to a Participant
                  in accordance with Section 6 hereof upon the exercise of an
                  Option.

            (r)   References in this Plan to a "termination of employment" or to
                  a  Participant  or employee who  terminates  employment or the
                  like, mean the Participant's (i) ceasing to be employed by, or
                  to provide  consulting  or other  services for, the Company or
                  any corporation (or any of its subsidiaries) which assumes the
                  Participant's  award in a transaction  to which Section 424(a)
                  of the Code  applies  or (ii)  ceasing  to be a member  of the
                  Board  of  Directors.  For  purposes  of the  foregoing,  if a
                  Participant  (a) at the  time of  reference,  is an  employee,
                  consultant or a member of the Board of  Directors,  or any two
                  of the three  relationships,  or (b) ceases to be an employee,
                  consultant   or  a  member  of  the  Board  of  Directors  and
                  immediately is engaged in another of such  relationships  with
                  the Company,  the Participant  shall not be considered to have
                  terminated  employment  until  he  ceases  the  last  of  such
                  relationships with the Company.

2.    Stock Subject to the Plan

            (a)   Plan Limit

                  Subject to adjustment as provided in Section 9 hereof, the
                  Committee may grant Options hereunder with respect to shares
                  of Company Stock that in the aggregate do not exceed 7,500,000
                  shares. To the extent that any Options terminate, expire or
                  are cancelled without having been exercised, the shares
                  covered by such Options shall again be available for grant
                  under the Plan. Shares of Company Stock issued under the Plan
                  may be either newly issued shares or treasury shares, at the
                  discretion of the Committee.

            (b)   Individual Limit

                  Subject to adjustment as provided in Section 9 hereof, during
                  any calendar year, the Committee shall not grant any one
                  Participant Options hereunder with respect to more than
                  4,900,000 shares of Company Stock, which limit shall include
                  any shares represented by an Option granted within the same
                  year that has been cancelled.

3. Administration of the Plan

      The Plan shall be administered by the Committee, provided, however, that
      in the absence of the appointment of the Committee or for any other reason
      determined by the Board of Directors, the Board of Directors may take any
      action under the Plan that would otherwise be the responsibility of the
      Committee. The Committee shall from time to time designate the individuals
      who shall be granted Options and the amount and type of such Options.

      The Committee shall have fill authority to administer the Plan, including
      authority to interpret and construe any provision of the Plan and the
      terms of any Option issued under it, correct any defect or supply any
      omission or reconcile any inconsistency in the Plan and any Option
      Agreement, adopt such rules and regulations for administering the Plan as
      it may deem necessary or appropriate, and delegate such administrative
      responsibilities as it deems appropriate, provided, however, that the
      Committee shall retain the responsibility to designate the Option
      recipients and the amount and type of such Options. Decisions of the
      Committee shall be final and binding on all parties. The Committee's
      determinations under the Plan may, but need not, be uniform and may be
      made on a Participant-by-Participant basis (whether or not two or more
      Participants are similarly situated).

      The Committee may, in its absolute discretion, without amending the Plan,
      accelerate the date on which any Option granted under the Plan becomes
      vested or otherwise adjust any of the terms of such Option (except that no
      such adjustment shall, without the consent of a Participant, reduce the
      Participant's rights under any previously granted and outstanding Option
      unless the Committee determines that such


                                       A-3


      adjustment is necessary or appropriate to prevent such Option from
      constituting "applicable employee remuneration" within the meaning of
      Section 162(m) of the Code).

      Whether an authorized leave of absence, or absence in military or
      government service, shall constitute a termination of employment, and the
      impact, if any, of any such leave of absence on Options theretofore
      granted under the Plan shall be determined by the Committee in its
      absolute discretion, subject to applicable law.

      A majority of the Committee shall constitute a quorum at any meeting, and
      the acts of a majority of the members present, or acts unanimously
      approved in writing by the entire Committee without a meeting, shall be
      the acts of the Committee.

      No member of the Committee shall be liable for any action, omission, or
      determination relating to the Plan, and the Company shall indemnify and
      hold harmless each member of the Committee and each other director or
      employee of the Company to whom any duty or power relating to the
      administration or interpretation of the Plan has been delegated against
      any cost or expense (including counsel fees) or liability (including any
      sum paid in settlement of a claim with the approval of the Committee)
      arising out of any action, omission or determination relating to the Plan,
      unless, in either case, such action, omission or determination was taken
      or made by such member, director or employee in bad faith and without
      reasonable belief that it was in the best interests of the Company.

4.    Eligibility

      The persons who shall be eligible to receive Options pursuant to the Plan
      shall be (i) officers and salaried employees of the Company and its
      subsidiaries (including employees who are also directors and prospective
      salaried employees conditioned on their becoming salaried employees), (ii)
      members of the Board of Directors (whether or not they also are employees
      of the Company), (iii) such consultants to the Company and its
      subsidiaries as the Committee shall select in its discretion, and (iv) any
      other key persons, as determined by the Committee in its sole discretion,
      provided, however, that Incentive Stock Options only may be granted to
      employees of the Company. For purposes of the preceding sentence, an
      employee means an individual who is (or is expected to be) classified as
      an employee of the Company for purposes of the Company's payroll. A
      director shall not be considered an employee of the Company as a result of
      the Company's payment of a director's fee.

5. Options

      The Committee may grant Options pursuant to the Plan. Each Option shall be
      evidenced by an Option Agreement in such form and including such terms as
      the Committee shall from time to time approve. Options shall comply with
      and be subject to the following terms and conditions:

      (a)   Identification of Options

            Each Option granted under the Plan shall be clearly identified in
            the applicable Option Agreement as either an Incentive Stock Option
            or as a Non-Qualified Stock Option. In the absence of such
            identification, an Option shall be deemed to be a Non-Qualified
            Stock Option.

      (b)   Exercise Price

            The exercise price-per-share of any Non-Qualified Stock Option
            granted under the Plan shall be such price as the Committee shall
            determine (which may be equal to, less than or greater than the then
            Fair Market Value of a share of Company Stock) on the date on which
            such Non-Qualified Stock Option is granted; provided, that such
            price may not be less than the minimum price required by law.
            Subject to Paragraph (d) of this Section 6, the exercise
            price-per-share of any Incentive Stock Option granted under the Plan
            shall be not less than 100% of the Fair Market Value of a share of
            Company Stock on the date on which such Incentive Stock Option is
            granted (except as permitted in connection with the assumption or
            issuance of Options in a transaction to


                                       A-4


            which Section 424(a) of the Code applies) and, to the extent any
            compensation payable in respect of an Option is intended to qualify
            as performance-based compensation under Section 162(m)(4)(C) of the
            Code, the exercise price-per-share of such Option shall be not less
            than 100% of the Fair Market Value of a share of Company Stock on
            the date on which such Option is granted.

      (c)   Term and Exercise of Options

            (1)   Each Option shall be exercisable at such times and under such
                  conditions as determined by the Committee and set forth in the
                  applicable Option Agreement, including performance criteria
                  with respect to the Company and/or the Participant. Except as
                  provided in Section 7 hereof, an Option shall first be
                  exercisable as of the date on which it vests, and shall remain
                  exercisable until the expiration of ten (10) years from the
                  date such Option was granted; provided, however, that each
                  Option shall be subject to earlier termination, expiration or
                  cancellation as provided in the Plan.

            (2)   Each Option shall be exercisable in whole or in part. The
                  partial exercise of an Option shall not cause the expiration,
                  termination or cancellation of the remaining portion thereof.
                  Upon the partial exercise of an Option, the Option Agreement
                  evidencing such Option shall be returned to the Participant
                  exercising such Option together with the delivery of the
                  certificates described in Section 6(c)(4) hereof.

            (3)   An Option shall be exercised by delivering notice to the
                  Company's principal office, to the attention of its Secretary,
                  at such time as the Committee reasonably may require. Such
                  notice shall be accompanied by the Option Agreement evidencing
                  the Option, shall specify the number of shares of Company
                  Stock with respect to which the Option is being exercised and
                  the effective date of the proposed exercise and shall be
                  signed by the Participant. The Participant may withdraw such
                  notice at any time prior to the close of business on the
                  business day immediately preceding the effective date of the
                  proposed exercise, in which case such Option Agreement shall
                  be returned to him. Payment for shares of Company Stock
                  purchased upon the exercise of an Option shall be made on the
                  effective date of such exercise either:

                  (i)   in cash, by certified check, bank cashier's check or
                        wire transfer; or

                  (ii)  unless provided otherwise in the applicable Option
                        Agreement, in shares of Company Stock owned by the
                        Participant (which, if acquired pursuant to the exercise
                        of a stock option, were acquired at least six months
                        prior to the option exercise date) and valued at their
                        Fair Market Value on the effective date of such
                        exercise, or partly in shares of Company Stock with the
                        balance in cash, by certified check, bank cashier's
                        check or wire transfer; or

                  (iii) unless provided otherwise in the applicable Option
                        Agreement, pursuant to procedures adopted by the
                        Committee whereby the Participant, by a properly written
                        notice, shall direct (A) an immediate market sale or
                        margin loan respecting all or a part of the shares of
                        Company Stock to which the Participant is entitled upon
                        exercise pursuant to an extension of credit by the
                        Company to the Participant of the exercise price (B) the
                        delivery of the shares of Company Stock from the Company
                        directly to the brokerage firm, and (C) the delivery of
                        the exercise price from the sale or margin loan proceeds
                        from the brokerage firm directly to the Company.

                  (iv)  at the discretion of the Committee and to the extent
                        permitted by law, by such other provision as the
                        Committee may from time to time prescribe.


                                       A-5


                  (v)   In addition, the Company may, in its sole discretion and
                        at the  request  of the  Participant,  (A)  lend  to the
                        Participant, with full recourse, an amount equal to such
                        portion of the payment  for the shares of Company  Stock
                        pursuant to the Option as the Committee  may  determine;
                        or (B) guarantee a loan obtained by the Participant from
                        a third-party for the purpose of tendering such payment.
                        Any payment in shares of Company Stock shall be effected
                        by the  delivery of such shares to the  Secretary of the
                        Company,  duly endorsed in blank or accompanied by stock
                        powers duly  executed in blank,  together with any other
                        documents  and evidences as the Secretary of the Company
                        shall require from time to time.

            (4)   Certificates for shares of Company Stock purchased upon the
                  exercise of an Option shall be issued in the name of the
                  Participant or his or her beneficiary (or permitted
                  transferee), as the case may be, and delivered to the
                  Participant or his or her beneficiary (or permitted
                  transferee), as the case may be, as soon as practicable
                  following the effective date on which the Option is exercised.

      (d)   Limitations on Grant of Incentive Stock Options

            (1)   To the extent that the aggregate Fair Market Value (determined
                  as of the time the option is granted) of the stock with
                  respect to which Incentive Stock Options granted under this
                  Plan and all other plans of the Company (and any plans of any
                  "subsidiary corporation" or "parent corporation" of the
                  Company within the meaning of Section 424 of the Code) are
                  first exercisable by any employee during any calendar year
                  shall exceed the maximum limit (currently, $100,000), if any,
                  imposed from time to time under Section 422 of the Code, such
                  options shall be treated as Non-Qualified Stock Options. In
                  such an event, the determination of which Options shall remain
                  Incentive Stock Options and which shall be treated as
                  Non-Qualified Stock Options shall be based on the order in
                  which such Options were granted, with the excess over the
                  first $100,000 granted deemed to be Non-Qualified Stock
                  Options. All other terms and provisions of such Options that
                  are deemed to be Non-Qualified Stock Options shall remain~
                  unchanged. Upon the exercise of an Option that, pursuant to
                  this Section 6(d)(1) is treated in part as an Incentive Stock
                  Option and in part as a Non-Qualified Stock Option, the
                  Company shall issue separate stock certificates evidencing the
                  shares of Company Stock treated as acquired upon exercise of
                  an Incentive Stock Option and the shares of Company Stock
                  treated as acquired upon exercise of a Non-Qualified Stock
                  Option and shall identify each such certificate accordingly in
                  its stock transfer records.

            (2)   No Incentive Stock Option may be granted to an individual if,
                  at the time of the proposed grant, such individual owns stock
                  possessing more than ten percent (10%) of the total combined
                  voting power of all classes of stock of the Company or any of
                  its "subsidiary corporations" or "parent corporations" (within
                  the meaning of Section 424 of the Code), unless (i) the
                  exercise price of such Incentive Stock Option is at least one
                  hundred ten percent (110%) of the Fair Market Value of a share
                  of Company Stock at the time such Incentive Stock Option is
                  granted and (ii) such Incentive Stock Option is not
                  exercisable after the expiration of five years from the date
                  such Incentive Stock Option is granted.

      (e)   Grants of Reload Options

            If provided in the applicable Option Agreement, an additional option
            (the "Reload Option") shall be granted to any Participant who,
            pursuant to Section 6(c)(3)(ii), delivers shares of Company Stock in
            partial or full payment of the exercise price of an Option (the
            "Original Option"). The Reload Option shall be for a number of
            shares of Company Stock equal to the number thus delivered, shall
            have an exercise price equal to the Fair Market Value of a share of
            Company Stock on the date of exercise of the Original Option, and
            shall have an expiration date no later than the expiration date of
            the Original Option. A Reload Option only may be granted if the
            exercise


                                       A-6


            price-per-share of the Original Option is no less than the Fair
            Market Value of a share of Company Stock on its date of grant.

      (f)   Effect of Termination of Employment

            (1)   Unless otherwise provided in an applicable Option Agreement,
                  in the event that the employment of a Participant with the
                  Company shall terminate for any reason other than Cause,
                  Disability or death (i) Options granted to such Participant,
                  to the extent that they were vested at the time of such
                  termination, shall remain exercisable until the expiration of
                  90 days after such termination, on which date they shall
                  expire, and (ii) Options granted to such Participant, to the
                  extent that they were not vested at the time of such
                  termination, shall expire at the close of business on the date
                  of such termination; provided, however, that no Option shall
                  be exercisable after the expiration of its term.

            (2)   Unless otherwise provided in an applicable Option Agreement,
                  in the event that the employment of a Participant with the
                  Company shall terminate on account of the death or Disability
                  of the Participant (i) Options granted to such Participant, to
                  the extent that they were vested at the time of such
                  termination, shall remain exercisable (pursuant to Section 16
                  hereof) until the expiration of one year after such
                  termination, on which date they shall expire, and (ii) Options
                  granted to such Participant, to the extent that they were not
                  vested at the time of such termination, shall expire at the
                  close of business on the date of such termination; provided.
                  however, that no Option shall be exercisable after the
                  expiration of its term.

            (3)   Unless otherwise provided in an applicable Option Agreement,
                  in the event of the termination of a Participant's employment
                  for Cause, all outstanding Options granted to such Participant
                  shall expire at the commencement of business on the effective
                  date of such termination (or deemed termination in accordance
                  with Section 2(c)).

      (g) Other Option Grants.

            The Committee, in its discretion, may grant Options with terms
            different than those set forth herein to the extent such Options are
            in substitution for and have terms equivalent to options granted by
            another company that was merged into or acquired by the Company or
            an Affiliate or whose assets or substantially all of whose assets
            were acquired by the Company or an Affiliate.

6. Pre-Vesting Exercise

      (a)   Pre-Vesting Exercise

            The Committee, in an Option Agreement, may permit a Participant to
            exercise an Option prior to the date on which it vests; provided,
            however, the unvested portion of the Company Stock issuable upon
            exercise of such Option shall be subject to the nontransferability,
            forfeiture and repayment provisions of this Section 7 until such
            shares vest.

      (b)   Restrictions on Transferability

            Until a share of Company Stock vests, the Participant may not
            transfer or assign the Participant's rights to such share of Company
            Stock or to any cash payment related thereto. Until a share of
            Company Stock so vests, no attempt to transfer or assign such shares
            or the right to any cash payment related thereto, whether by
            transfer, pledge, hypothecation or otherwise and whether voluntary
            or involuntary, by operation of law or otherwise, shall vest the
            transferee or assignee with any interest or right in or with respect
            to such share of Company Stock or such cash payment, and the
            attempted transfer or assignment shall be of no force and effect.


                                       A-7


            Each such certificate that is issued pursuant to this Section 7
            shall bear the following legend, in addition to any legends or
            restrictions imposed pursuant to Section 12 hereof:

            "The transferability of this certificate and the shares of stock
            represented hereby are subject to the restrictions, terms and
            conditions (including forfeiture and restrictions against transfer)
            contained in the SIGA Technologies, Inc. Amended and Restated 1996
            Incentive and Non-Qualified Stock Option Plan and an Agreement
            entered into between the registered owner of such shares and SIGA
            Technologies, Inc. A copy of the Plan and Agreement is on file in
            the office of the Secretary of SIGA Technologies, Inc."

            Such legend shall not be removed from the certificates evidencing
            such exercised shares of Company Stock until such shares vest, at
            which time stock certificates shall be issued pursuant to Section 12
            hereof free of such legend.

            Each such stock certificate, together with the stock powers relating
            to such shares of Company Stock, shall be deposited by the Company
            with a custodian designated by the Company (the "Certificate
            Custodian"). The Company may designate itself as Certificate
            Custodian hereunder. The Company shall cause such Certificate
            Custodian to issue to the Participant a receipt evidencing the
            certificates that are registered in the name of the Participant and
            are held by the Certificate Custodian.

      (c)   Dividends

            Unless the Committee in its absolute discretion otherwise
            determines, any securities or other property (including dividends
            paid in cash) received by a Participant with respect to a share of
            Company Stock issued pursuant to this Section 7, as a result of any
            dividend, stock split, reverse stock split, recapitalization,
            merger, consolidation, combination, exchange of shares or otherwise,
            will not vest until such share of Company Stock vests, and shall be
            promptly deposited with the Certificate Custodian designated
            pursuant to Section 7(b) hereof until such share vests, at which
            time such property shall be delivered to the Participant. Any such
            cash dividends, prior to the date the share vests, shall be merely
            an unfunded, unsecured promise of the Company to pay a sum of money
            to the Participant in the future.

      (d)   Forfeiture and Repayment

            Upon termination of a Participant's employment with the Company or
            an Affiliate for any reason (including death), all unvested shares
            of Company Stock exercised pursuant to any Option hereunder shall be
            immediately and irrevocably forfeited. In the event of any such
            forfeiture, the Certificate Custodian shall surrender to the Company
            as soon as practicable after the effective date of such forfeiture
            all certificates for such shares issued to Participant by the
            Company. As soon as practicable after such surrender, but in no
            event later than 30 days after such surrender, Participant shall be
            entitled to a payment by the Company in an amount, in cash equal to
            the aggregate of the exercise price-per-share paid for each
            exercised but unvested share of Company Stock so forfeited.

7.    Right of Recapture

      If at any time within one year after the date on which a Participant
      exercises an Option, the Committee determines in its discretion that the
      Company has been materially harmed by the Participant, whether such harm
      (a) results in the Participant's termination or deemed termination of
      employment for Cause or (b) results from any activity of the Participant
      determined by the Committee to be in competition with any activity of the
      Company, or otherwise inimical, contrary or harmful to the interests of
      the Company (including, but not limited to, accepting employment with or
      serving as a consultant, adviser or in any other capacity to an entity
      that is in competition with or acting against the interests of the
      Company), then any gain realized by the Participant from such exercise
      shall be paid by the Participant to the Company upon notice from the
      Company. Such gain shall be determined as of the date of such exercise,
      without regard to any subsequent change in the Fair Market Value of a
      share of Company Stock. The Company shall have the


                                       A-8


      right to offset such gain against any amounts otherwise owed to the
      Participant by the Company (whether as wages, vacation pay, or pursuant to
      any benefit plan or other compensatory arrangement).

8.    Adjustment Upon Changes in Company Stock

      (a)   Shares Available for Grants

            Subject to any required action by the stockholders of the Company,
            in the event of any change in the number of shares of Company Stock
            outstanding by reason of any stock dividend or split, reverse stock
            split, recapitalization, merger, consolidation, combination or
            exchange of shares or similar corporate change, the maximum number
            of shares of Company Stock with respect to which the Committee may
            grant Options under Section 3 hereof shall be appropriately adjusted
            by the Committee. In the event of any change in the number of shares
            of Company Stock outstanding by reason of any other event or
            transaction, the Committee may, but need not, make such adjustments
            in the number and class of shares of Company Stock with respect to
            which Options may be granted under Section 3 hereof as the Committee
            may deem appropriate. Any such adjustment pursuant to this Section
            9(a) shall be made by the Committee, whose determination shall be
            final, binding and conclusive.

      (b)   Outstanding Options -- Increase or Decrease in Issued Shares Without
            Consideration

            Subject to any required action by the stockholders of the Company,
            in the event of any increase or decrease in the number of issued
            shares of Company Stock resulting from a subdivision or
            consolidation of shares of Company Stock or the payment of a stock
            dividend (but only on the shares of Company Stock), or any other
            increase or decrease in the number of such shares effected without
            receipt of consideration by the Company, the Committee shall
            proportionally adjust the number of shares of Company Stock subject
            to each outstanding Option and the exercise price-per-share of
            Company Stock of each such Option. Any such adjustment pursuant to
            this Section 9(b) shall be made by the Committee, whose
            determination shall be final, binding and conclusive.

      (c)   Outstanding Options -- Certain Mergers

            Subject to any required action by the stockholders of the Company,
            in the event that the Company shall be the surviving corporation in
            any merger or consolidation (except a merger or consolidation as a
            result of which the holders of shares of Company Stock receive
            securities of another corporation), each Option outstanding on the
            date of such merger or consolidation shall pertain to and apply to
            the securities which a holder of the number of shares of Company
            Stock subject to such Option would have received in such merger or
            consolidation.

      (d)   Outstanding Options -- Certain Other Transactions

            In the event of (1) a dissolution or liquidation of the Company, (2)
            a sale of all or substantially all of the Company's assets, (3) a
            merger or consolidation involving the Company in which the Company
            is not the surviving corporation or (4) a merger or consolidation
            involving the Company in which the Company is the surviving
            corporation but the holders of shares of Company Stock receive
            securities of another corporation and/or other property, including
            cash, the Committee shall, in its absolute discretion, have the
            power to:

                  (i)   cancel, effective immediately prior to the occurrence of
                        such event, each Option outstanding immediately prior to
                        such event  (whether or not then  vested),  and, in full
                        consideration   of   such   cancellation,   pay  to  the
                        Participant to whom such Option was granted an amount in
                        cash,  for each share of Company  Stock  subject to such
                        Option  equal  to  the  excess  of  (A)  the  value,  as
                        determined by the Committee in its absolute  discretion,
                        of the property  (including cash) received by the holder
                        of a share of  Company  Stock as a result of such  event
                        over (B) the exercise price of such Option; or


                                       A-9


                  (ii)  provide for the exchange of each Option outstanding
                        immediately prior to such event (whether or not then
                        vested) for an option on some or all of the property
                        which a holder of the number of shares of Company Stock
                        subject to such Option would have received in such
                        transaction or on shares of the acquiror or surviving
                        corporation and, incident thereto, make an equitable
                        adjustment as determined by the Committee in its
                        absolute discretion in the exercise price of the Option,
                        or the number of shares or amount of property subject to
                        the Option or, if appropriate, provide for a cash
                        payment to the Participant to whom such Option was
                        granted in partial consideration for the exchange of the
                        Option.

      (e)   Outstanding Options -- Other Changes

            In the event of any change in the capitalization of the Company or a
            corporate change other than those specifically referred to in
            Sections 9(b), (c) or (d) hereof, the Committee may, in its absolute
            discretion, make such adjustments in the number and class of shares
            subject to Options outstanding on the date on which such change
            occurs and in the per-share exercise price of each such Option as
            the Committee may consider appropriate to prevent dilution or
            enlargement of rights. In addition, if and to the extent the
            Committee determines it is appropriate, the Committee may elect to
            cancel each Option outstanding immediately prior to such event
            (whether or not then vested), and, in full consideration of such
            cancellation, pay to the Participant to whom such Option was granted
            an amount in cash, for each share of Company Stock subject to such
            Option, equal to the excess of (A) the Fair Market Value of Company
            Stock on the date of such cancellation over (B) the exercise price
            of such Option.

      (f)   Effect of Loss of Affiliate Status

            If an entity ceases to be an Affiliate because the Company sells its
            interest in such entity to another party or parties, such event
            shall constitute a termination of employment from the Company and
            its Affiliates by Participants employed by such entity as of the
            date it ceases to be an Affiliate. The Committee may, but need not,
            adjust the provisions of the Plan related to the expiration of any
            Options not yet vested at termination of employment, as it considers
            appropriate in connection with the specific event resulting in loss
            of Affiliate status.

      (g)   No Other Rights

            Exceptas expressly provided in the Plan, no Participant shall have
            any rights by reason of any subdivision or consolidation of shares
            of stock of any class, the payment of any dividend, any increase or
            decrease in the number of shares of stock of any class or any
            dissolution, liquidation, merger or consolidation of the Company or
            any other corporation. Except as expressly provided in the Plan, no
            issuance by the Company of shares of stock of any class, or
            securities convertible into shares of stock of any class, shall
            affect, and no adjustment by reason thereof shall be made with
            respect to, the number of shares of Company Stock subject to an
            Option or the exercise price of any Option.

9. Rights as a Stockholder

      No person shall have any rights as a stockholder with respect to any
      shares of Company Stock covered by or relating to any Option granted
      pursuant to this Plan until the date that the Participant becomes the
      registered owner of such shares. Except as otherwise expressly provided in
      Section 9 hereof, no adjustment to any Option shall be made for dividends
      or other rights for which the record date occurs prior to the date such
      stock certificate is issued.

10. No Special Employment Rights; No Right to Option


                                      A-10


      Nothing contained in the Plan or any Option Agreement shall confer upon
      any Participant any right with respect to the continuation of his or her
      employment by or other relationship with the Company or interfere in any
      way with the right of the Company, subject to the terms of any separate
      employment agreement to the contrary, at any time to terminate such
      employment or to increase or decrease the compensation of the Participant
      from the rate in existence at the time of the grant of an Option. No
      person shall have any claim or right to receive an Option hereunder. The
      Committee's granting of an Option to a Participant at any time shall
      neither require the Committee to grant an Option to such Participant or
      any other Participant or other person at any time nor preclude the
      Committee from making subsequent grants to such Participant or any other
      Participant or other person.

11.   Securities Matters

      (a)   The Company shall be under no obligation to effect the  registration
            pursuant  to the  Securities  Act of 1933,  as amended  from time to
            time, of any interests in the Plan or any shares of Company Stock to
            be issued hereunder or to effect similar  compliance under any state
            laws.  Notwithstanding  anything herein to the contrary, the Company
            shall  not be  obligated  to cause to be  issued  or  delivered  any
            certificates evidencing shares of Company Stock pursuant to the Plan
            unless and until the  Company is  advised  by its  counsel  that the
            issuance and delivery of such certificates is in compliance with all
            applicable  laws,  regulations  of  governmental  authority  and the
            requirements  of any securities  exchange on which shares of Company
            Stock are traded.  The Committee may require,  as a condition of the
            issuance and delivery of certificates  evidencing  shares of Company
            Stock  pursuant  to the terms  hereof,  that the  recipient  of such
            shares make such covenants, agreements and representations, and that
            such certificates bear such legends,  as the Committee,  in its sole
            discretion,  deems  necessary or  desirable.  The Company  shall not
            permit any shares of Company Stock to be issued pursuant to the Plan
            unless   such   shares  of   Company   Stock  are  fully   paid  and
            non-assessable,  within the meaning of Section  152 of the  Delaware
            General  Corporation  Law, except as otherwise  permitted by Section
            153(c) of the Delaware General Corporation Law.

      (b)   The exercise of any Option granted hereunder shall be effective only
            at such time as counsel to the Company  shall have  determined  that
            the  issuance and  delivery of shares of Company  Stock  pursuant to
            such exercise is in compliance with all applicable laws, regulations
            of  governmental  authority and the  requirements  of any securities
            exchange on which shares of Company Stock are traded.  The Committee
            may, in its sole discretion, defer the effectiveness of any exercise
            of an Option  granted  hereunder  in order to allow the  issuance of
            shares of Company  Stock  pursuant  thereto to be made  pursuant  to
            registration or an exemption from  registration or other methods for
            compliance  available  under federal or state  securities  laws. The
            Committee shall inform the Participant in writing of its decision to
            defer  the  effectiveness  of  the  exercise  of an  Option  granted
            hereunder.  During the period that the effectiveness of the exercise
            of an Option has been  deferred,  the  Participant  may,  by written
            notice,  withdraw  such  exercise  and obtain a refund of any amount
            paid with respect thereto.

12. Withholding Taxes

      (a)   Cash Remittance

            Whenever shares of Company Stock are to be issued upon the exercise
            of an Option, the Company shall have the right to require the
            Participant to remit to the Company, in cash, an amount sufficient
            to satisfy the federal, state and local withholding tax
            requirements, if any, attributable to such exercise prior to the
            delivery of any certificate or certificates for such shares.

      (b)   Stock Remittance

            At the election of the Participant, subject to the approval of the
            Committee, when shares of Company Stock are to be issued upon the
            exercise of an Option, in lieu of the remittance required by Section
            13(a) hereof, the Participant may tender to the Company a number of
            shares of


                                      A-11


            Company Stock, the Fair Market Value of which at the tender date the
            Committee determines to be sufficient to satisfy the federal, state
            and local withholding tax requirements, if any, attributable to such
            exercise and not greater than the Participant's estimated total
            federal, state and local tax obligations associated with such
            exercise.

      (c)   Stock Withholding

            The Company shall have the right, when shares of Company Stock are
            to be issued upon the exercise of an Option in lieu of requiring the
            remittance required by Section 13(a) hereof, to withhold a number of
            such shares, the Fair Market Value of which at the exercise date the
            Committee determines to be sufficient to satisfy the federal, state
            and local withholding tax requirements, if any, attributable to such
            exercise and is not greater than the Participant's estimated total
            federal, state and local tax obligations associated with such
            exercise.

13. Amendment or Termination of the Plan

      The Board of Directors may, at any time, suspend or discontinue the Plan
      or revise or amend it in any respect whatsoever; provided, however, that
      if and to the extent required under Section 422 of the Code (if and to the
      extent that the Board of Directors deems it appropriate to comply with
      Section 422) and if and to the extent required to treat some or all of the
      Options as "performance-based compensation" within the meaning of Section
      162(m) of the Code (if and to the extent that the Board of Directors deems
      it appropriate to meet such requirements), no amendment shall be effective
      without the approval of the stockholders of the Company, that (i) except
      as provided in Section 9 hereof, increases the number of shares of Company
      Stock with respect to which Options may be issued under the Plan, (ii)
      modifies the class of individuals eligible to participate in the Plan or
      (iii) materially increases the benefits accruing to individuals pursuant
      to the Plan. Nothing herein shall restrict the Committee's ability to
      exercise its discretionary authority hereunder pursuant to Section 4
      hereof, which discretion may be exercised without amendment to the Plan.
      No action under this Section 14 may, without the consent of a Participant,
      reduce the Participant's rights under any previously granted and
      outstanding Option except to the extent that the Board of Directors
      determines that such amendment is necessary or appropriate to prevent such
      Options from constituting "applicable employee remuneration" within the
      meaning of Section 162(m) of the Code.

14.   No Obligation to Exercise

      The grant to a Participant of an Option shall impose no obligation upon
      such Participant to exercise such Option.

15.   Transferability of Options

      (a)   Except as otherwise provided in this Section 16, during the lifetime
            of a Participant each Option granted to a Participant shall be
            exercisable only by the Participant and no Option shall be
            assignable or transferable otherwise than by will or by the laws of
            descent and distribution.

      (b)   Upon the death of a Participant, outstanding Options granted to such
            Participant that have not been transferred pursuant to Section 16(a)
            hereof may be exercised only by the executors or  administrators  of
            the Participant's  estate or by any person or persons who shall have
            acquired  such right to  exercise  by will or by the laws of descent
            and  distribution.  No  transfer  by will or the laws of descent and
            distribution  of any Option,  or the right to  exercise  any Option,
            shall be effective to bind the Company  unless the  Committee  shall
            have been  furnished  with written notice thereof and with a copy of
            the will and/or such evidence as the Committee may deem necessary to
            establish the validity of the transfer.

      (c)   Any permissible transfer of an Option only shall be effective after
            the Committee shall have been furnished with an agreement by the
            transferee to comply with all the terms and conditions of the Option
            that are or would have been applicable to the Participant and to be
            bound by the acknowledgments made by the Participant in connection
            with the grant of the Option.


                                      A-12


      (d)   In the event  that at any time any  doubt  exists as to the right of
            any person to  exercise  or receive a payment  under an Option,  the
            Committee  shall be  entitled,  in its  discretion,  to  delay  such
            exercise or payment  until it is satisfied  that such right has been
            confirmed  (which  may,  but  need  not be,  by  order of a court of
            competent jurisdiction),  or to permit such exercise or make payment
            only upon  receipt  of a bond or  similar  indemnification  (in such
            amount and in such form as is satisfactory to the Committee).

16.   Expenses and Receipts

      The expenses of the Plan shall be paid by the Company. Any proceeds
      received by the Company in connection with any Option will be used for
      general corporate purposes.

17. Limitations Imposed by Section 162(m)

      Notwithstanding any other provision hereunder, if and to the extent that
      the Committee determines the Company's federal tax deduction in respect of
      an Option may be limited as a result of Section 162(m) of the Code, the
      Committee may delay the payment in respect of such Option until a date
      that is within 30 days after the date that compensation paid to the
      Participant no longer is subject to the deduction limitation under Section
      162(m) of the Code. In the event that a Participant exercises an Option at
      a time when the Participant is a "covered employee," and the Committee
      determines to delay the payment in respect of any such Option, the
      Committee shall credit cash or, in the case of an amount payable in
      Company Stock, the Fair Market Value of the Company Stock, payable to the
      Participant to a book account. The Participant shall have no rights in
      respect of such book account and the amount credited thereto shall not be
      transferable by the Participant other than by will or laws of descent and
      distribution.

      The Committee may credit additional amounts to such book account as it may
      determine in its sole discretion. Any book account created hereunder shall
      represent only an unfunded unsecured promise by the Company to pay the
      amount credited thereto to the Participant in the future.

18.   Mitigation of Excise Tax

      If any payment or right accruing to a Participant under this Plan (without
      the application of this Section), either alone or together with other
      payments or rights accruing to the Participant from the Company or an
      affiliate ("Total Payments") would constitute a "parachute payment" (as
      defined in Section 280G of the Code and regulations thereunder), the
      Committee may in each particular instance determine to (i) reduce such
      payment or right to the largest amount or greatest right that will result
      in no portion of the amount payable or right accruing under the Plan being
      subject to an excise tax under Section 4999 of the Code or being
      disallowed as a deduction under Section 280G of the Code, or (ii) take
      such other actions, or make such other arrangements or payments with
      respect to any such payment or right as the Committee may determine in the
      circumstances. Any such determination shall be made by the Committee in
      the exercise of its sole discretion, and such determination shall be
      conclusive and binding on the Participant. The Participant shall cooperate
      as may be requested by the Committee in connection with the Committee's
      determination, including providing the Committee with such information
      concerning such Participant as the Committee may deem relevant to its
      determination.

19.   Participant Obligation to Notify

      In the event that the Participant (a) disposes of any shares of Company
      Stock acquired upon the exercise of an Incentive Stock Option (i) prior to
      the expiration of two years after the date such Incentive Stock Option was
      granted or prior to one year after the date the shares were acquired or
      (ii) under any other circumstances described in Section 422(a) of the Code
      or any successor provision, or (b) makes an election under Section 83(b)
      of the Code or any successor provision, with respect to Company Stock
      acquired pursuant to Section 7 hereof, the Participant shall notify the
      Company of such disposition or election within 10 days thereof


                                      A-13


20.   Information to Participants

      To the extent required by applicable law, the Company shall provide to
      each Participant, during the period for which such Participant has one or
      more Options outstanding, copies of all annual reports and other
      information which are provided to all stockholders of the Company. Except
      as otherwise noted in the foregoing sentence, the Company shall have no
      obligation or duty to affirmatively disclose to any Participant, and no
      Participant shall have any right to be advised of, any material
      information regarding the Company or any Affiliate at any time prior to,
      upon or otherwise in connection with, the exercise of an Option.

21.   Funding

      All benefits payable under this Plan shall be paid directly by the
      Company. The Company shall not be required to fund or otherwise segregate
      assets to be used for payment of benefits under this Plan.

22.   Failure to Comply

      In addition to the remedies of the Company elsewhere provided for herein,
      a failure by a Participant (or beneficiary or permitted transferee) to
      comply with any of the terms and conditions of the Plan or the agreement
      executed by such Participant (or beneficiary or permitted transferee)
      evidencing an Option, unless such failure is remedied by such Participant
      (or beneficiary or permitted transferee) within 10 days after having been
      notified of such failure by the Committee, shall be grounds for the
      cancellation and forfeiture of such Option, in whole or in part, as the
      Committee, in its absolute discretion, may determine.

23.   Effective Date of Plan

      The Plan was initially adopted by the Board of Directors in 1996 and was
      approved by shareholders of the Company. The Plan was subsequently amended
      in 1998, 1999, 2000 and 2004 to increase the number of shares with respect
      to which Options may be granted under the Plan and each of the amendments
      was approved by the shareholders of the Company. An amendment and
      restatement to the Plan was approved by the Board of Directors, on May 3,
      2001, subject to approval by the stockholders of the Company, and the Plan
      as further amended and restated was approved by the Board of Directors, as
      of June 29, 2001, subject to approval by the stockholders of the Company.
      Options that were not previously authorized by the stockholders of the
      Company under the provisions of the Plan as in effect prior to May 3, 2001
      that have not yet been approved by the stockholders may be granted under
      the Plan at any time prior to the receipt of such stockholder approval;
      provided, however, that each such grant shall be subject to such approval.
      Without limitation on the foregoing, no Option may be exercised prior to
      the receipt of such approval. If the amended and restated Plan is not so
      approved on or before May 3, 2002, then the May 3, 2001 and the June 29,
      2001 amendments and restatements of the Plan and all Options granted
      pursuant to such amendments and restatements shall forthwith automatically
      terminate and be of no force or effect.

24.   Term of the Plan

      The right to grant Options under the Plan will terminate on January 1,
      2006 with respect to the 2,500,000 shares of Company Stock authorized
      under the provisions of the Plan in effect prior to this amendment and
      restatement, and on May 3, 2011 with respect to the additional 5,000,000
      shares of Company Stock authorized pursuant to the May 3, 2001 amendment
      and restatement.

25.   Applicable Law

      Except to the extent preempted by any applicable federal law, the Plan
      will be construed and administered in accordance with the laws of the
      State of Delaware, without reference to the principles of conflicts of
      law.

26.   Severability


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      If any provision of the Plan shall hereafter be held to be invalid,
      unenforceable or illegal in whole or in part, in any jurisdiction under
      any circumstances for any reason, (a) such provision shall be reformed to
      the minimum extent necessary to cause such provision to be valid,
      enforceable and legal while preserving the intent expressed by the Plan or
      (b) if such provision cannot be so reformed, such provision shall be
      severed from the Plan and, in the discretion of the Committee, an
      equitable adjustment shall be made to the Plan (including, without
      limitation, addition of necessary further provisions to the Plan) so as to
      give effect to the intent as so expressed and the benefits so provided.
      Such holding shall not affect or impair the validity, enforceability or
      legality of such provision in any other jurisdiction or under any other
      circumstances. Neither such holding nor such reformation or severance
      shall affect or impair the legality, validity or enforceability of any
      other provision of the Plan.


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