Definitive Additional Materials

UNITED STATES

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Beginning on April 29, 2008, Insituform Technologies, Inc. will present to certain investors the following slide presentation.


April
2008
Investor
Presentation


2
Introduction
Insituform
is
a
leading
provider
of
proprietary
technologies
and
services
for
rehabilitating
sewer,
water
and
other
underground
piping
systems
without
digging
or
disruption
The Company participates in an enormous global market with global demand for sewer
and water rehabilitation and infrastructure conservatively estimated to be $22.6 trillion
(1)
over the next 25 years
To capitalize on future growth opportunities, Insituform continues to diversify
geographically, develop new technologies and enter new lines of business
Insituform
has
the
right
plan
to
build
stockholder
value,
and
an
experienced
management
team and Board to execute it
(1)  Source: Booz Allen Hamilton, Global Infrastructure Partners, World Energy Outlook, Organisation for Economic Co-operation and Development (OECD), Boeing, Drewry
Shipping Consultants, U.S. Department of Transportation. As cited in strategy+business magazine, issue 46, Spring 2007.


3
Introduction (Cont’d)
Insituform is executing its business plan and improving performance
Revenues in Q1 2008 increased 9.5% over Q1 2007
Gross profit in Q1 2008 increased 31.9% over Q1 2007
Operating income in Q1 2008 increased $7 million from a $3.8 million loss in Q1 2007
Recent wins include:
$35.1 mm CIPP project in India
$14.7 mm CIPP project in U.K.
$7.7 mm I Blue®
project in Hong Kong
$4.25 mm I Blue®
Madison Avenue contract in U.S.
Insituform hired Joe Burgess as its new CEO in April 2008
20 years of water, sewer and infrastructure related experience
Proven track record of improving operational and financial performance
Value of Insituform is being threatened by Water Asset Management (“WAM”), a recently-
formed
hedge
fund
with
NO
operating
experience
in
the
industries
we
serve
and
NO
meaningful
investment track record
WAM
has
no
plan
or
relevant
capabilities
to
operate
your
Company
and
is
seeking Board
control to pursue a fire sale of your Company
Don’t Let WAM Deter the Company’s Progress


4
About Insituform
Leading
provider
and
developer
of
innovative
technologies
in
the
trenchless
rehabilitation
industry for sewer, water and other underground piping systems
Invented
the
trenchless
(CIPP –
cured
in
place
pipe)
rehabilitation
industry
in
1971
Successfully integrated complex business processes including R&D, manufacturing,
installing, licensing and contracting
Headquartered in St. Louis, MO with operations in over 40 countries
Diversifying business both geographically and by product offering
Market Capitalization: ~$400 million
Employees: ~1,600
(1) See Appendix for reconciliation to a comparable GAAP measure.
(2)
Based
on
FY2007
EBITDA
of
$34.3
million,
which
is
adjusted
for
discontinuation
of
Tunneling
business.
Other
Europe
North America
74%
22%
4%
Tite Liner
Rehabilitation
76%
24%
LTM Revenues
LTM EBITDA
(1)
$507 million
$41 million
Represents
a
20%
(2)
improvement from FY2007


5
Our Businesses
Offers trenchless technologies to repair and
enhance aging sewer and water pipeline
systems
Restores potable water pipes through recently
developed I Blue®
technology
Serves principally municipalities and other
government bodies
Leading position in both the North American
and European markets
Segment Revenues Breakdown (2007)
North America –
75%
Europe –
24%
Rest of World –
<1%
Offers lining systems for internally protecting
pipelines from abrasion and corrosion
Provides gas release and leak detection
systems for pipelines
Targets customer segments such as
multinational oil, gas, industrial and mining
companies
Will perform projects on 5 continents in 2008
Segment Revenue Breakdown (2007)
North America –
71%
Other –
29%
Rehabilitation (Sewer and Water)
Tite
Liner®
(United
Pipeline
Systems)
Highly-respected industry leader
Ranked #1 wastewater specialty contractor by Engineering News Record in 2006
Ranked #2 behind GE in water industry by ChangeWave Alliance Survey in 2007


6
Strong History of Product Development and
Integration
Process
Year
Introduced
Description
Insituform® CIPP
1971
Rehabilitation of sewers, pipelines and other conduits
iPlus™ Infusion™
2004
Trenchless method used for the rehabilitation of small-diameter sewer pipelines
iPlus™ Composite
2004
Trenchless method used for the rehabilitation of large-diameter sewer pipelines
Insituform® RPP™
1997
Trenchless technology used for the rehabilitation of forced sewer mains and industrial
pressure pipelines
PolyFlex™ and
PolyFold®
2006
Methods of rehabilitating transmission and distribution water mains using high-density
polyethylene liners
iTAP®
2007
Robotic method for reinstating potable water service connections from inside a water
main
Thermopipe® Lining
System
1993
Polyester-reinforced polyethylene lining system for the rehabilitation of distribution water
mains
Insituform® PPL®
1995
ANSI/NSF 61 certified trenchless technology used for the rehabilitation of drinking water
and industrial pressure pipelines
Tite Liner®
1991
Method of lining new and existing pipe with a corrosion and abrasion resistant high-
density polyethylene pipe
Safetyliner™ Liner
2005
Grooved HDPE liner, installed in an industrial pipeline using the Tite Liner® process, and
normally used in natural gas or CO2 pipelines to allow release of gas 


7
Previous Experience
2005 - 2008
Veolia Water NA
President & Chief Executive Officer
Chief Operating Officer
Responsible for ~$700 million business with 2,800
employees
2002 - 2005
Veolia Water NA
President, North America – Operating Service
Vice President and General Manager
P&L responsibility for ~$120 million region
1985 – 2002
Ogden Project, Inc. (renamed Covanta Water)
President – Water Systems operations
Senior Vice President – Ogden Projects WTE 
P&L responsibility for ~$300 million business
Responsible for 12 of 28 sites
International business development and JV
experience
Started up $70 million business
1981 – 1985
Monsanto Company
Project Leader
Several accounting and finance roles
With the addition of Joe Burgess, Insituform has the right team
to deliver sustainable and profitable growth
Our New President & CEO: Joe Burgess
20 years of water, sewer and infrastructure related experience
Highly experienced in strategic planning, operations management and customer service
Most recently CEO of
Veolia Water NA, a leading provider of water and sewer services to municipal,
federal and industrial customers
Under his leadership Veolia Water NA grew and became profitable during a down market
Revenues grew from $500 million to $725 million between 2004 –
2007
(90% of revenue
growth was organic during that period)
EBIT grew from -$15 million to +$30 million between 2004 –
2007


8
NAME
At INSU SINCE
TITLE
INDUSTRY
EXPERIENCE
EXPERIENCE
J. Joseph Burgess
2008
President and Chief Executive Officer
~15 years
Over 20 years of experience of water, sewer and infrastructure related
experience
Served as Chief Executive Officer of Veolia Water North America
Thomas E. Vossman
2005
Senior Vice President and Chief Operating Officer
~3 years
Served as a consultant to the contracting industry
Served as Senior Vice President of American Residential Services at
Encompass Services Corporation
David F. Morris
2005
Senior Vice President, General Counsel and Chief
Administrative Officer
~3 Years
Served as a partner in corporate, M&A and securities practice areas at
law firm Thompson Coburn LLP
Served as Senior Vice President, Associate General Counsel and
Secretary of Unified Financial Services
David A. Martin
1993
Vice President and Chief Financial Officer
~15 Years
Served as Corporate Controller and Controller of European operations at
Insituform 
Served as Senior Accountant at BDO Seidman, LLP
Alex Buehler
2004
Vice President of Marketing and Technology
~4 Years
Served in United States Army Corps of Engineers where he led large-
scale construction programs in support of NATO and U.S. Army Europe
Holds a degree in Civil Engineering from West Point
Daniel Cowan
2006
Vice President of Strategic Business Initiatives
~2 Years
Was Co-founder, Chairman and CEO of E-Commerce and Trade Services
in Hong Kong
Worked as an international strategy consultant at First Union National
Bank based in Hong Kong
Management Experience
Average Industry Experience is ~7 years


9
North American Rehabilitation
Europe Rehabilitation
Historical Financials -
Revenues
Note:  Figures adjusted for discontinuation of Tunneling business.
Other International
Tite Liner®
($ mm)
($ mm)
($ mm)
($ mm)
Insituform
$345.1
$346.1
$390.2
$355.1
$333.3
$316.5
$0.0
$90.0
$180.0
$270.0
$360.0
$450.0
2003
2004
2005
2006
2007
LTM
3/31/08
$113.0
$106.9
$90.3
$89.7
$75.9
$59.5
$0.0
$50.0
$100.0
$150.0
2003
2004
2005
2006
2007
LTM
3/31/08
$20.6
$24.5
$38.5
$46.2
$41.6
$45.8
$0.0
$10.0
$20.0
$30.0
$40.0
$50.0
2003
2004
2005
2006
2007
LTM
3/31/08
$2.6
$1.0
$0.7
$0.3
$0.2
$3.1
$0.0
$1.0
$2.0
$3.0
$4.0
2003
2004
2005
2006
2007
LTM
3/31/08
$506.5
$495.6
$527.4
$483.6
$433.9
$399.7
$0.0
$200.0
$400.0
$600.0
2003
2004
2005
2006
2007
LTM
3/31/08
($ mm)


10
8.1%
5.9%
7.4%
11.1%
11.7%
6.9%
$0.00
$10.00
$20.00
$30.00
$40.00
$50.00
$60.00
$70.00
2003
2004
2005
2006
2007
LTM 3/31/08
(10.0%)
(5.0%)
0.0%
5.0%
10.0%
15.0%
20.0%
Rehabilitation
Tite Liner
% Margin
EBITDA
(1)
($ mm)
EPS
Historical Financials
$0.04
$0.23
$0.75
$0.96
$0.47
$0.66
$0.00
$0.20
$0.40
$0.60
$0.80
$1.00
$1.20
2003
2004
2005
2006
2007
LTM 3/31/08
Note:  Figures adjusted for discontinuation of Tunneling business.
$22.9
$31.9
$53.9
$61.6
$34.3
$41.2
% Margin
®
(1) See Appendix for reconciliation to a comparable GAAP measure.


11
1990
2000
2005
U.S.
Drinking
Water
Assessment
Grade
(1)
(1)
Source: American Society of Civil Engineers Report Card for America’s Infrastructure, 2005.
(2)
Source:  EPA website.  www.epa.gov/waterinfrastructure/basicinformation.html.
B-
C
D
D+
D-
D-
The
American
Society
of
Civil
Engineers
has
given
the
U.S.
infrastructure
nearly
a
failing
grade,
indicating a sharp deterioration since 1990
Aging U.S. Water Infrastructure
U.S.
Sewer
Assessment
Grade
(1)
The American Society of Civil Engineers
recently issued a blue ribbon report
regarding the status of the nation's
drinking water & sewer infrastructure
Infrastructure is aging
Downward trend in quality of
physical plant
Reflects accumulated deferrals of
critical maintenance & repairs
Key Findings:
30%
of
pipes
are
between
40-80
years old
(2)
10% of pipes are more than 80
years old
(2)
1990
2000
2005


1
$2,635
$2,930
$1,363
$2
$2
$0
$600
$1,200
$1,800
$2,400
$3,000
Market Size        '07 Revenues
Market Size        '07 Revenues
Market Size        '07 Revenues
$mm
$962
$801
$350
$100
$2
$0
$200
$400
$600
$800
$1,000
Market Size        '07 Revenues
Market Size        '07 Revenues
Market Size        '07 Revenues
Global Trenchless Sewer Rehabilitation Market
Global Trenchless Water Rehabilitation Market
$mm
North America
Europe
Rest of World
Global Trenchless Sewer & Water Markets
North America
Europe
Rest of World
$1,159
NM
~
~
~
~
~
Insituform
’07 Revenues
Insituform
’07 Revenues
Insituform
’07 Revenues
Insituform
’07 Revenues
Insituform
’07 Revenues
Insituform
’07 Revenues
(1)
Management estimates
(1)
(1)
(1)
(1)
(1)
(1)
12


13
Our Strategic Plan
Optimize North American Rehabilitation
Achieve growth in a market predicted to remain soft in the near term and be in a position to capitalize on long-term growth opportunities
Expand customer base to work with suburban collar communities located around existing urban clients
Refocus sales force to diversify customer base for industrial and other negotiated work
Intensify cross-selling opportunities (Insituform Blue®) on existing accounts
Target high single-digit operating margins
Optimize crew resources and productivity
Improve project execution
Reduce operating expenses
Optimize product supply chain
Target double-digit international revenue growth
India water and sewer spend is anticipated to be $7.5 billion over the next 10 years
Hong Kong water and sewer spend is anticipated to be $1.6 billion over the next 15 years
Commercialize
Insituform
Blue®
product
portfolio
globally
Grow
Insituform
Blue®
to
at
least
$
150
million
in
revenues
in
three
to
five
years
Aggressively
diversifying
United
Pipeline
Systems®
into
new
and
dynamic
end-markets
Streamline key corporate functions
Investigate and implement outsourcing opportunities
Maximize information systems potential
Comprehensive departmental review of corporate and regional overhead accounts
Acquire complementary technologies
Acquire or license new products to introduce into our established global distribution network
Realign management to achieve optimal structure
Consolidate back office functions to reduce costs
Standardize estimating, job planning and scheduling processes
Optimize manufacturing capabilities
Continue expansion into developing countries (Eastern Europe) where risk premium is present
Achieve revenue growth and margin improvement through efficiencies
Diversify by Product, Geography and Customer Segment
Integrate and Grow Europe
Realign Overhead
Inorganic Growth


14
Decreased funding under State Revolving Funds
As a proportion of overall wastewater infrastructure spending, federal support accounted for
78% of funding in 1978, but makes up only 3% of funding today
Economic concerns lead to postponement of infrastructure spending by State and local governments
Municipalities express uncertainty over future spending plans due to low customer confidence,
poor jobs data and higher unemployment (UCT 11th Annual Municipal Survey, February 2008)
Weak credit environment
30% decline in municipal bond issuances
Overall infrastructure spending down in 2007 versus 2006 and expected to remain flat in 2008
Your Board and Management have moved rapidly to address issues
in North American Rehabilitation
Optimize North American Rehabilitation
Recent
Challenges
in
North
America


15
Deployed new CIPP technologies such as iPlus™
Infusion™, iPlus™
Composite and Insituform®
PPL®
to
further reduce costs
Refocused and realigned sales force
Reengineered installation process to improve competitive position
Enhanced operational efficiency through labor and equipment productivity
Optimized supply chain
Actions Taken
Recent Results
9% increase in North America backlog since December 31, 2007
Increased level of negotiated business
Rehabilitation EBITDA margin improved from 7.0% for FY 2007 to 9.1% LTM March 2008
Key North American wins include: County of Maui, Hawaii  $7.4 million, Detroit Water and Sewer District 
$6.7
million,
City
and
County
of
Honolulu,
Hawaii
(2
contracts)
$11.1
million,
Ft.
Rucker,
Alabama
(U.S.
Army)
$6.2
million,
and
City
of
Atlanta,
Georgia
(2
contracts)
$9.2
million
We  have taken necessary actions to ensure Your Company’s long-term success
Optimize North American Rehabilitation
Strong Results From Aggressive Actions to Address
Challenges in North America


16
Tite Liner
®
Backlog
Sewer and Water Rehabilitation Backlog
$mm
$mm
Q1 2008 Total Backlog increased 35.1% from year-end 2006
$111.8
$190.4
$213.3
$201.7
$234.1
$257.6
$0.0
$50.0
$100.0
$150.0
$200.0
$250.0
$300.0
YE2003
YE2004
YE2005
YE2006
YE2007
Q1 2008
$7.0
$8.6
$20.2
$12.8
$26.2
$32.2
$0.0
$5.0
$10.0
$15.0
$20.0
$25.0
$30.0
$35.0
YE2003
YE2004
YE2005
YE2006
YE2007
Q1 2008
Optimize North American Rehabilitation
Backlog Trends


17
Developing applications to rehabilitate drinkable water infrastructure
Processes include iTAP®: utilizes robotic method for reinstating potable water
service connections from inside a water main
PolyFlex™
and PolyFold®: uses high density polyethylene lines to rehabilitate
transmission and distribution water mains
Extraordinary growth prospects in North America and internationally
Large portion of infrastructure is privately-owned compared to sewer infrastructure
Most projects are negotiated vs. bid process
Clean water value proposition
I
Blue®
is
already
winning
major
contracts
demonstrating
the
great
potential
of
our
clean water strategy
$4.25 million contract to rehabilitate a century-old water main beneath Madison
Avenue (NYC)
$7.7
million
project
to
rehabilitate
~19
miles
of
water
pipeline
under
and
around
the
famed Nathan Road (Hong Kong)
Diversify by Product, Geography and Customer
Segment
Insituform Blue®
-
Potable Water Pipe Rehabilitation
business


18
Diversify by Product, Geography and Customer
Segment
Recent win:
$7.7
million
project
to
rehabilitate
~19
miles
of
water
pipeline
under
and
around
the
famed Nathan Road (Hong Kong)
Hong Kong has recently introduced a 15-year investment program
anticipated spend is $1.6 billion over 15 years
targeting
a
reduction
in
leakage
rate
from
25%
to
15%
and
water
main
bursts
from
27,200 to 15,000 (to reduce water loss from 220,000,000 cubic meters to 180,000,000
cubic meters)
Insituform has won 2 of 3 expected 3-yr. term sewer contracts resulting in $3 million of
the $4.5 million allocated thus far
Additionally they currently expect to award approximately $9 million in water
contracts
Nathan Road, Hong Kong
Hong Kong I Blue®
Opportunity


19
Diversify by Product, Geography and Customer
Segment
India anticipates spending approximately $7.5 billion over next ten years to rehabilitate
sewer and water infrastructure
We
believe
that
we
will
bid
on
an
additional
$50
-
$100
million
of
work
in
2008
(all
sewer projects)
Current wins in India total $35.1 million
Insituform
is
taking
a
“business
building”
approach
in
India
and
NOT
simply
performing
one-off projects
New Delhi, India
India Opportunity


20
Provides solutions to rehabilitate pipelines that operate in heavy use and high wear
industrial applications
Aggressive diversification into new and dynamic end-markets
Expanding
internationally
to
areas
where
sustained
escalation
of
metal
prices
and
strong
investment by oil companies are driving demand
UPS has had record backlog at both YE2007 and 3/31/08 and we continue to see
robust new business opportunities throughout the world
Will perform projects on five continents during 2008
Successfully completed first project in China in 2008
Typical customers include: British Petroleum, Shell, Anadarko Petroleum, Dow Chemical,
and Kinder Morgan
Diversify by Product, Geography and Customer
Segment
United Pipeline Systems®
-
Gas and Oil Pipeline
Rehabilitation Throughout the World


21
Integrate / Grow Europe
Realigning management to integrate and grow Europe
Bruce Frost recently named Group Vice President of Europe
Continue to work toward resolution of German partnership situation
Optimize manufacturing and operations to achieve significant cost savings
Optimization of estimating, planning and scheduling processes
Continued expansion into Eastern Europe
Key European Optimization Factors


22
Continuous reduction of overhead and improvement in operating margins through disciplined
contracting practices and ongoing cost reduction efforts
Operating margins improved to 2.5% in Q1 2008 from (3.3%) in Q1 2007
Targeting $12 million in annualized savings by end of 2008
$4
million
of
these
savings
will
be
reinvested
in
other
strategic
initiatives
(such
as
international
growth and Insituform Blue®)
Key Overhead Reduction Initiatives
Implementation of “lean practices”
to optimize management, administrative and other support of field
operations in the U.S. and Europe
Improve global information technology platform to integrate disparate systems and decrease manual
and redundant processing and reporting
Increased focus on reducing employee expenses including travel and entertainment
Reduction of legal expenses following recent settlements and judgments that were favorable to your
Company
U.S. sales force reduction through
Realignment of lower value selling practices with operational management teams
Cross-selling initiatives
Top to bottom departmental review
Realign Overhead
Overhead Reduction and Operating Margin Improvement


23
Return to Financial Performance
Anticipate high single-digit revenue growth in 2008, and similar growth in 2009:
Tite Liner®
-
expect 20% improvement in revenue for 2008 and 2009
Water
Approximately
$13
million
in
revenue
for
2008
expected
as
compared
to
$4
million
in
2007;
targeting
to
double
revenue
each
year going forward; should be a $150 million business in three to five years
Europe anticipated to increase revenue approximately 10% each year due to continued growth throughout Europe, including new
markets in Eastern Europe
Other International markets –
expect significant growth (from approximately $2 million in 2007 to approximately $20 million in 2008
relating to India and other selected Asian markets)
North American sewer rehabilitation –
expect small growth (2-4%) as market conditions remain soft; growth will come from ongoing
customer diversification initiatives
Gross profit expected to increase significantly (approximately 17-20% each year):
North American Sewer Rehabilitation –
expect significantly improved margins in 2008 due to ongoing optimization initiatives and
improved project execution, and healthy improvements in 2009 from continuing efforts
European gross profit should rise due to top-line growth (existing and new markets), and slightly improved margins from
optimization initiatives
Water (Insituform Blue®) –
expect a positive contribution to gross profit in 2008, resulting from revenue growth and resulting
scale/efficiency improvements
Tite Liner®
expected to grow healthily as a result of top-line growth; gross margin percent will trend down slightly as a result of new
market growth coming at lower pricing
Other International markets expected to increase significantly due to revenue growth.  Margins expected to remain at premium levels
to our core markets due to early stage market conditions and less competition
Operating expenses should decrease in 2008 and 2009:
Expect overall lower operating expenses in 2008 as compared to 2007:
Reduced corporate and North American rehabilitation support costs
Offset somewhat by increased spending in growth areas (Insituform Blue®, Tite Liner®, Europe, and other international
markets)
As a result of the above, we anticipate comfortably beating consensus analyst EPS estimates of $0.54 for 2008 and $0.67 for 2009


24
Board’s Strategic Review
The Board regularly reviews and considers the Company’s operating and
financial performance in terms of driving value for stockholders
Prior to WAM announcing its campaign, the Board embarked upon a
comprehensive review of the Company’s operating performance, capital
structure and strategic position
Engaged Merrill Lynch as independent financial adviser
As part of its review, Merrill Lynch met with management, studied the
proposed plan and evaluated a range of financial and strategic alternatives
No limitations imposed by either the Board or management on Merrill Lynch’s
review or evaluation process
Your Board unanimously concluded that this is NOT the time to pursue a
sale of your Company, and that the best way to create stockholder value
for ALL stockholders is to execute the Company’s strategic plan


25
Selling the Company Now Makes NO Sense
Water Asset Management’s proposed fire sale of Insituform is not in the best interests of
all stockholders for a number of reasons, including:
Weak M&A Environment
Uncertain economic outlook and volatile financing markets have dampened
M&A activity dramatically
Market dominated by opportunistic bids for companies adversely impacted by
economic and financial market conditions
Severely constrained financing market
Scarcity of credit
Increased financing costs
Resetting of leverage levels
Severe correction in LBO market
Financial sponsor transactions are at lowest level in several years, and
sponsors are being required to provide significantly greater equity capital,
limiting sponsors’
ability to pay
Insituform’s strategic plan and its substantial growth opportunities are beginning to
yield positive results and should provide a significantly greater return to
stockholders than the return that would be realized upon a fire sale of your Company


2
Qualifications Not Including INSU Board Experience
Water
Construction
Manufacturing
Finance
Sales
International
Joe Burgess
Chief Executive
Officer
CEO with 20 years of global industry, operating, strategic planning and
customer service experience
Former CEO of Veolia Water North America
Stephen
Cortinovis
Director
Director since 1997
Partner of Bridley Capital Partners since 2001
Former President – Europe, Emerson Electric (25 year career; responsible for
$5 billion international business)
Former Chairman of Emerson Global Finance Company
Other Directorships: Plexus Corp. and Lasco Foods, Inc.
Stephanie A.
Cuskley
Chair of Audit
Committee
Director since 2005
Former Managing Director and Group Head – Mid Cap Investment Banking
Coverage, JPMorgan Securities—20 plus years 
Former Executive Vice President of Integrated Resources
Other Directorships: Avantair, Inc.
John Dubinsky
Chair of Strategic
Planning Committee
Director since 2002
Vice Chairman of BJC HealthCare
Former CEO of Mercantile Bank 
Former CEO of Mark Twain Bancshares for 13 years, and employee for 30
years
Former President Emeritus of Firstar Bank 
Other Directorships: Stifel Financial Corp. since 2003
Juanita Hinshaw
Chair of
Compensation
Committee
Director since 2000
President and Chief Executive Officer of H&H Advisers 
Former Senior Vice President and CFO of Graybar Electric Company
Former Corporate Treasurer of Monsanto Corporation, approximately $9 billion
company
Other Directorships: Synergetics USA and The Williams Company
Sheldon Weinig
Chair of
Governance &
Nominating
Committee
Director since 1992
Adjunct Professor at Columbia University and at State University of New York,
Stony Brook 
Founder, Chariman and CEO of Material Research Corporation for 20 plus
years
Served as Vice Chairman at Sony Engineering and Manufacturing for seven
years
Served as member of President Reagan’s Board of Advisors on Private Sector
Initiatives 
Al Woods
Chairman of the
Board
Director since 1997; Chairman of the Board since 2003
President of Woods Group
Former Chairman and CEO of R&S/Strauss
Other Directorships:  Clutchmobile
Directors with diverse background of experience were intentionally selected to sit on your
Board to match all facets of Insituform’s business
Highly Experienced, Independent and
Qualified Board
26


27
Strong Corporate Governance
6 of 7 directors are independent
Directors with diverse background of experience were intentionally selected to sit on
your Board to match all facets of Insituform’s business
All directors have extensive management and/or leadership experience
Average management and leadership experience is > 32 years
Active and involved Board
Frequent meetings and discussions
Nine full Board meetings, 23 committee meetings in 2007
Committees are empowered to provide direction and proper oversight; retain
independent advisors and consultants
All key committees comprised solely of independent directors
Separate Chairman and Chief Executive Officer
Executive compensation aligned with stockholder value creation


28
Water Asset Management: No Interest in
Creating Sustainable Growth
WAM’s Objective Is Irresponsible, Self-Serving and Threatens the Future Value of your
Company
Water Asset Management (WAM), a recently formed hedge fund, is seeking control of   
Insituform’s Board in an effort to pursue a fire sale of the Company
WAM has NO plan to run Insituform
WAM’s stated objective is to sell the Company immediately
WAM demanded Insituform NOT hire a permanent CEO, and instead pursue a fire
sale with NO CEO in place
WAM’s proposed fire sale of Insituform makes no sense for a number of reasons,     
including:
Insituform’s strategic plan and its substantial growth opportunities are beginning
to yield positive results
Weak M&A environment
Severely constrained financing market
Disappearance of the LBO market
Your Board has considered and determined that a sale of Insituform at the current time,
when the Company’s plan is beginning to yield positive results and in a weak M&A
climate will be disruptive, potentially produce inconclusive results and damage the long-
term value of the Company


29
WAM: “The Great Unknown”
WAM and its nominees have demonstrated:
NO relevant operating experience in the markets Insituform serves
We found NO evidence to support WAM’s repeated claims of experience in our
business or investment prowess
Since
May
2007,
WAM
and
its
affiliates
have
been
trying
to
raise
funds,
but
WAM
has
offered few details of its strategy (beyond the “promise of the global water industry”)
or prior investments (other than a few examples, none of which WAM quantified)
NO meaningful investment track record
NO real interest in Insituform executing its strategic plan and remaining a public company
WAM’s principals have shorted Insituform’s stock during the last two years
NO
strategic
public
M&A
experience
(despite
its
platform
to
sell
the
Company)
NO plan for the Company
Reject WAM’s Effort to Take Control of Your Board by Voting on the WHITE Proxy


30
WAM: “The Great Unknown”
(Cont’d)
Your Board repeatedly offered to meet with WAM’s nominees to better understand their background and
qualifications
WAM repeatedly refused our invitations, declaring that its nominees’
commitment to “immediately
pursuing…
a sale of the Company, and immediately ending the search for a permanent CEO,”
were
“the most important criteria”
for determining their qualifications to serve on the Company’s Board
More than half of WAM’s nominees are WAM insiders, none of whom has any public company
board experience
The principal public company board experience of another nominee, former Senator D’Amato, 
consists of a lengthy tenure at scandal-plagued Computer Associates (now CA, Inc.); two years ago,
a major proxy advisory firm recommended AGAINST the re-election of Senator D’Amato to the CA
board
Don’t be fooled by WAM’s hastily assembled agenda
WAM’s
abrupt
about-face
effort
to
cobble
together
a
fallback
agenda
to
its
fire
sale
plan
as
detailed
in
its
jargon-laden
April
25
letter
to
stockholders
simply
parrots
routine
actions
being
taken by Company management (and discussed with WAM in a December 2007 meeting) –
it’s not a
business plan
WAM’s nominees, if elected, are committed to running an ill-advised fire sale of Insituform
Reject WAM’s Effort to Take Control of Your Board by Voting on the WHITE Proxy


31
Summary Conclusion
The Board, with the assistance of its financial advisor, has evaluated strategic
alternatives and concluded the best way to create stockholder value is to execute the
business plan and now is NOT the time to pursue a sale 
We are confident Insituform has the right strategic plan in place to grow and diversify its
business and enhance stockholder value
Your Board and management have the right experience to execute Insituform’s strategy
Insituform has the right CEO, with 20 years of water, sewer and infrastructure related
experience
Insituform’s strategic plan and its substantial growth opportunities are beginning to yield
positive results
WAM
has
no
plan
and
no
relevant
experience
and
its
interests
are
not
aligned
with
other stockholders
VOTE THE WHITE PROXY CARD TODAY


32
Appendix


33
Non-GAAP Reconciliation
Insituform has presented EBITDA, a non-GAAP financial measure, as supplemental information regarding Insituform’s
business because management uses it as a key measure of our performance.  EBITDA is defined as earnings before interest
expense, income tax expense, depreciation and amortization.  EBITDA is not a measure of financial performance under GAAP
and should not be considered an alternative to net earnings or any other measure of performance under GAAP or to cash
flows from operating, investing or financing activities as a measure of liquidity.  Insituform’s calculation of EBITDA may be
different from the calculations used by other companies and/or analysts, and therefore comparability may be limited.
Insituform believes that providing this non-GAAP financial measure is useful to investors for a number of reasons.  We believe
it
is
useful
to
investors
to
evaluate
our
results
because
EBITDA
excludes
certain
items
that
are
not
directly
related
to
our
core
operating performance.  The non-GAAP financial measure also provides a consistent basis for investors to understand
Insituform’s
financial
performance
in
comparison
to
historical
periods.
In
addition,
it
allows
investors
to
evaluate
Insituform’s
performance using the same methodology and information as that used by Insituform’s management.
Non-GAAP measures are subject to inherent limitations because they do not include all of the expenses included under GAAP
and because they involve the exercise of judgment of which charges are excluded from the non-GAAP financial measure. 
However, Insituform’s management compensates for these limitations by providing the relevant disclosure of the items
excluded in the calculation of non-GAAP EBITDA.  Management compensates for these limitations by evaluating the non-
GAAP measure together with the most directly comparable GAAP measure.  Insituform has historically provided non-GAAP
measures
to
the
investment
community
as
a
supplement
to
its
GAAP
results,
to
enable
investors
to
evaluate
Insituform’s
business performance in the way that management does.


34
Non-GAAP Reconciliation (cont’d)
Insituform
Fiscal year ended December 31,
LTM
($ mm) (unaudited)
2003
2004
2005
2006
2007
3/31/2008
Income from continuing operations
$1.1
$6.2
$20.2
$26.3
$12.9
$18.2
Plus: taxes on income
1.2
2.5
8.9
11.8
(0.1)
1.6
Plus: interest expense
8.2
9.3
8.5
6.8
5.4
5.1
Plus: depreciation and amortization
12.3
13.9
16.4
16.6
16.3
16.2
ADJUSTED EBITDA
$22.9
$31.9
$53.9
$61.6
$34.3
$41.2
Rehabilitation
Fiscal year ended December 31,
LTM
($ mm) (unaudited)
2003
2004
2005
2006
2007
3/31/2008
Income from continuing operations
($0.6)
$3.8
$15.8
$20.1
$6.3
$12.2
Plus: taxes on income
0.1
0.7
6.9
8.9
(3.0)
(1.5)
Plus: interest expense
7.9
9.2
8.4
6.8
5.4
5.1
Plus: depreciation and amortization
11.4
13.1
15.6
16.0
15.5
15.5
ADJUSTED EBITDA
$18.8
$26.8
$46.7
$51.9
$24.3
$31.3
Tite Liner®
Fiscal year ended December 31,
LTM
($ mm) (unaudited)
2003
2004
2005
2006
2007
3/31/2008
Income from continuing operations
$1.7
$2.4
$4.3
$6.2
$6.5
$6.0
Plus: taxes on income
1.2
1.8
2.0
2.9
2.8
3.1
Plus: interest expense
0.3
0.1
0.0
0.0
0.0
0.0
Plus: depreciation and amortization
1.0
0.8
0.8
0.6
0.7
0.7
ADJUSTED EBITDA
$4.1
$5.1
$7.2
$9.7
$10.1
$9.9


35
Additional Information
Insituform has filed a definitive proxy statement with the Securities and Exchange Commission (“SEC”) in connection with its
2008
Annual
Meeting.
Insituform’s
stockholders
are
strongly
advised
to
read
the
definitive
proxy
statement
carefully,
as
it
contains important information. Free copies of the definitive proxy statement, and any amendments or supplements thereto,
and
other
materials
filed
by
Insituform
with
the
SEC
will
be
available
free
of
charge
on
the
SEC’s
website
at
www.sec.gov,
on
Insituform’s
website
at
www.insituform.com
under
Investors/SEC
or
by
directing
requests
to
Insituform’s
proxy
solicitor,
Innisfree M&A Incorporated, toll free at (888) 750-5834.
Forward-Looking Statements
The
Private
Securities
Litigation
Reform
Act
of
1995
provides
a
“safe
harbor”
for
forward-looking
statements.
The
Company
makes forward-looking statements in this document that represent the Company’s beliefs or expectations about future events
or financial performance. These forward-looking statements are based on information currently available to the Company and
on management’s beliefs, assumptions, estimates and projections and are not guarantees of future events or results. When
used
in
this
document,
the
words
“anticipate,”
“estimate,”
“believe,”
“plan,”
“intend,”
“may,”
“will”
and
similar
expressions
are intended to identify forward-looking statements, but are not the exclusive means of identifying such statements. Such
statements
are
subject
to
known
and
unknown
risks,
uncertainties
and
assumptions,
including
those
referred
to
in
the
“Risk
Factors”
section of the Company’s Annual Report on Form 10-K for the year ended December 31, 2007, as filed with the
Securities and Exchange Commission on March 10, 2008. In light of these risks, uncertainties and assumptions, the forward-
looking events discussed may not occur. In addition, our actual results may vary materially from those anticipated, estimated,
suggested or projected. Except as required by law, we do not assume a duty to update forward-looking statements, whether
as a result of new information, future events or otherwise. Investors should, however, review additional disclosures made by
the Company from time to time in its periodic filings with the Securities and Exchange Commission. Please use caution and
do not place reliance on forward-looking statements. All forward-looking statements made by the Company in this document
are qualified by these cautionary statements.
Insituform®,
the
Insituform®
logo
and
Insituform
Blue®
are
the
registered
trademarks
of
Insituform
Technologies,
Inc.
and
its
affiliates.


Important Information

Insituform Technologies, Inc. filed its 2008 definitive proxy statement with the SEC in connection with its 2008 Annual Meeting. Insituform’s stockholders are strongly advised to read the definitive proxy statement carefully, as it contains important information. Free copies of the definitive proxy statement, and any amendments or supplements thereto, and other materials filed by Insituform with the SEC will be available free of charge on the SEC’s website at www.sec.gov, at Insituform’s website on www.insituform.com under Investors/SEC or by directing requests to Insituform’s proxy solicitor, Innisfree M&A Incorporated, toll free at 1-888-750-5834.