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 * Avalon Ventures IX, L.P.   2. Issuer Name and Ticker or Trading Symbol ARATANA THERAPEUTICS, INC. [PETX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 1134 KLINE STREET 3. Date of Earliest Transaction (Month/Day/Year) 02/03/2014 (Street) LA JOLLA, CA 92037 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 02/03/2014   S   825,000 D $ 19 3,345,543 (1) D

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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
Avalon Ventures IX, L.P. 1134 KLINE STREET LA JOLLA, CA 92037		X
Avalon Ventures IX GP, LLC 1134 KLINE STREET LA JOLLA, CA 92037		X

Signatures

Avalon Ventures IX, LP, /s/ Douglas Downs, Douglas Downs, Authorized Signatory		02/05/2014
**Signature of Reporting Person		Date
Avalon Ventures IX GP, LLC, /s/ Douglas Downs, Douglas Downs, Authorized Signatory		02/05/2014
**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)	The aggregate shares reported reflect a 2-share decrease from the Reporting Person's amended Form 4 filed on July 8, 2013 as a result of Series A, B and C Convertible Preferred Stock which converted into shares of the Issuer's Common Stock on a 1-for-0.601685 basis upon the closing of the Issuer's initial public offering.
Remarks: Avalon Ventures IX GP, LLC, in its capacity as the general partner of Avalon Ventures IX, LP, may be deemed to be the beneficial owner of the shares of the Issuer owned by Avalon Ventures IX, LP, as in its capacity as the general partner, it has the power to dispose, direct the disposition of, and vote the shares of the Issuer owned by Avalon Ventures IX, LP. Each of Avalon Ventures IX, LP and Avalon Ventures IX GP, LLC and their respective affiliates disclaim beneficial ownership of all shares of the Issuer in which they do not have a pecuniary interest

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