SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Invus, L.P. (Last) (First) (Middle) C/O THE INVUS GROUP, LLC 750 LEXINGTON AVENUE, 30TH FLOOR (Street) NEW YORK NY 10022 (City) (State) (Zip)	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)
	3. Date of Earliest Transaction (Month/Day/Year) 09/16/2016
	4. If Amendment, Date of 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

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	09/16/2016		S		12,512,124	D	$24.8273(1)	87,460,875	D(2)(3)(4)

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 Securities Underlying Derivative Security (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: 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

1. Name and Address of Reporting Person* Invus, L.P. (Last) (First) (Middle) C/O THE INVUS GROUP, LLC 750 LEXINGTON AVENUE, 30TH FLOOR (Street) NEW YORK NY 10022 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Artal International S.C.A. (Last) (First) (Middle) 10-12 AVENUE PASTEUR, L-2310 (Street) LUXEMBOURG N4 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Artal International Management S.A. (Last) (First) (Middle) 10-12 AVENUE PASTEUR, L-2310 (Street) LUXEMBOURG N4 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Artal Group S.A. (Last) (First) (Middle) 10-12 AVENUE PASTEUR, L-2310 (Street) LUXEMBOURG N4 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Westend S.A. (Last) (First) (Middle) 10-12 AVENUE PASTEUR, L-2310 (Street) LUXEMBOURG N4 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Stichting Administratiekantoor Westend (Last) (First) (Middle) IJSSELBURCHT 3 NL-6825 BS ARNHEM (Street) THE NETHERLANDS P7 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Minne Pascal (Last) (First) (Middle) PLACE STE. GUDULE, 19 (Street) B-1000, BRUXELLES C9 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Invus Advisors, L.L.C. (Last) (First) (Middle) C/O THE INVUS GROUP, LLC 750 LEXINGTON AVENUE, 30TH FLOOR (Street) NEW YORK NY 10022 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. This amount represents the $24.8273 sales price per share of common stock of the Issuer received by Invus, L.P. in connection with a secondary block trade which closed on September 16, 2016.

2. These securities are directly held by Invus, L.P.

3. 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.

4. 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.

	INVUS, L.P., By: Invus Advisors, L.L.C., its general partner, By: /s/ Raymond Debbane, Name: Raymond Debbane, Title: President	09/16/2016
	INVUS ADVISORS, L.L.C., By: /s/ Raymond Debbane, Name: Raymond Debbane, Title: President	09/16/2016
	ARTAL INTERNATIONAL S.C.A., By: ARTAL INTERNATIONAL MANAGEMENT S.A., its managing partner, By: /s/ Anne Goffard, Name: Anne Goffard, Title: Managing Director	09/16/2016
	ARTAL INTERNATIONAL MANAGEMENT S.A., By: /s/ Anne Goffard, Name: Anne Goffard, Title: Managing Director	09/16/2016
	ARTAL GROUP S.A., By: /s/ Anne Goffard, Name: Anne Goffard, Title: Authorized Person	09/16/2016
	WESTEND S.A., By: /s/ Pascal Minne, Name: Pascal Minne, Title: Director	09/16/2016
	STICHTING ADMINISTRATIEKANTOOR WESTEND, By: /s/ Pascal Minne, Name: Pascal Minne, Title: Sole Member of the Board	09/16/2016
	/s/ Pascal Minne	09/16/2016
	** Signature of Reporting Person	Date
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* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
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