Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Invus, L.P.
  2. Issuer Name and Ticker or Trading Symbol
Blue Buffalo Pet Products, Inc. [BUFF]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
C/O THE INVUS GROUP, LLC, 750 LEXINGTON AVENUE, 30TH FLOOR
3. Date of Earliest Transaction (Month/Day/Year)
07/27/2015
(Street)

NEW YORK, NY 10022
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 07/27/2015   S   28,464,603 D $ 20 114,987,547 D (1) (2) (3)  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Invus, L.P.
C/O THE INVUS GROUP, LLC
750 LEXINGTON AVENUE, 30TH FLOOR
NEW YORK, NY 10022
  X   X    
Minne Pascal
PLACE STE. GUDULE, 19
BRUXELLES, C9 B-1000
  X   X    
Artal International S.C.A.
10-12 AVENUE PASTEUR
LUXEMBOURG, N4 L-2310
  X   X    
Artal International Management S.A.
10-12 AVENUE PASTEUR
LUXEMBOURG, N4 L-2310
  X   X    
Artal Group S.A.
10-12 AVENUE PASTEUR
LUXEMBOURG, N4 L-2310
  X   X    
Westend S.A.
10-12 AVENUE PASTEUR
LUXEMBOURG, N4 L-2310
  X   X    
Stichting Administratiekantoor Westend
DE BOELELAAN 7
AMSTERDAM, P7 NL-1083 HJ
  X   X    
Invus Advisors, L.L.C.
C/O THE INVUS GROUP, LLC
750 LEXINGTON AVENUE, 30TH FLOOR
NEW YORK, NY 10022
  X   X    

Signatures

 INVUS, L.P., By: Invus Advisors, L.L.C., its general partner, By: /s/ Raymond Debbane, Name: Raymond Debbane, Title: President   07/27/2015
**Signature of Reporting Person Date

 INVUS ADVISORS, L.L.C., By: /s/ Raymond Debbane, Name: Raymond Debbane, Title: President   07/27/2015
**Signature of Reporting Person Date

 ARTAL INTERNATIONAL S.C.A., By: ARTAL INTERNATIONAL MANAGEMENT S.A., its managing partner, By: /s/ Anne Goffard, Name: Anne Goffard, Title: Managing Director   07/27/2015
**Signature of Reporting Person Date

 ARTAL INTERNATIONAL MANAGEMENT S.A., By: /s/ Anne Goffard, Name: Anne Goffard, Title: Managing Director   07/27/2015
**Signature of Reporting Person Date

 ARTAL GROUP S.A., By: /s/ Anne Goffard, Name: Anne Goffard, Title: Authorized Person   07/27/2015
**Signature of Reporting Person Date

 WESTEND S.A., By: /s/ Pascal Minne, Name: Pascal Minne, Title: Director   07/27/2015
**Signature of Reporting Person Date

 STICHTING ADMINISTRATIEKANTOOR WESTEND, By: /s/ Pascal Minne, Name: Pascal Minne, Title: Sole Member of the Board   07/27/2015
**Signature of Reporting Person Date

 /s/ Pascal Minne   07/27/2015
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) These securities are directly held by Invus, L.P.
(2) Invus Advisors, L.L.C. is the general partner of Invus, L.P. Artal International S.C.A. is the managing member of Invus Advisors, L.L.C. The managing partner of Artal International S.C.A. is Artal International Management S.A., which is a wholly owned subsidiary of Artal Group S.A., which is a wholly owned subsidiary of Westend S.A., which is a wholly owned subsidiary of Stichting Administratiekantoor Westend ("Stichting"). Mr. Pascal Minne is the sole member of the board of the Stichting.
(3) Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.
 
Remarks:
For purposes of Section 16 of the Exchange Act, the Reporting Persons may be deemed to be directors by deputization of the Issuer by virtue of Invus, L.P.'s right to designate certain members of the Issuer's board of directors pursuant to an amended and restated investor rights agreement among the Issuer, Invus, L.P. and certain other stockholders of the Issuer.

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