Sec Form 4 Filing - Broadfin Healthcare Master Fund Ltd @ ARATANA THERAPEUTICS, INC. - 2019-07-18

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 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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1. Name and Address of Reporting Person Broadfin Healthcare Master Fund Ltd 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) 20 GENESIS CLOSE, ANSBACHER HOUSE, SECOND FLOOR, 1344 3. Date of Earliest Transaction (MM/DD/YY) 07/18/2019 (Street) GRAND CAYMAN, E9KY1-1108 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 07/18/2019 D 7,258,135 D 0 D ( 1 )

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 Broadfin Healthcare Master Fund Ltd 20 GENESI S CLOSE ANSBACHER HOUSE, SECOND FLOOR, 1344 GRAND CAYMAN, E9KY1-1108 X Broadfin Capital, LLC 300 PARK AVENUE 25TH FLOOR NEW YORK, NY10022 X KOTLER KEVIN C/O BROADFIN CAPITAL, LLC 300 PARK AVENUE, 25TH FLOOR NEW YORK, NY10022 X Signatures BROADFIN CAPITAL, LLC, By: /s/ Kevin Kotler, Managing Member 07/18/2019 Signature of Reporting Person Date BROADFIN HEALTHCARE MASTER FUND, LTD., By: /s/ Kevin Kotler, Director 07/18/2019 Signature of Reporting Person Date /s/ Kevin Kotler 07/18/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The securities are held in the account of Broadfin Healthcare Master Fund, Ltd., a private investment fund managed by Broadfin Capital, LLC and may be deemed to be beneficially owned by Kevin Kotler, managing member of Broadfin Capital, LLC. Each of Broadfin Capital, LLC, Broadfin Healthcare Master Fund, Ltd. and Kevin Kotler disclaim beneficial ownership of the reported securities except to the extent of his or its pecuniary interest therein, and affirmatively disclaim being a "group" for purposes of Section 16 of the Securities Exchange Act of 1934, as amended. ( 2 )See Remarks.

Remarks: On July 18, 2019, pursuant to an Agreement and Plan of Merger, dated as of April 26, 2019 (the "Merger Agreement"), by and among Elanco Animal Health Incorporated, an Indiana corporation ("Elanco"), Elanco Athens Inc., a Delaware corporation and a direct wholly owned subsidiary of Elanco ("Acquisition Sub"), and the Issuer, Acquisition Sub merged with and into the Issuer, with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of Elanco (the "Merger"). Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), each share of the Issuer's common stock that was outstanding immediately prior to the Effective Time (other than certain excluded shares as described in the Merger Agreement) was automatically converted into the right to receive (A) 0.1481 validly issued, fully paid and non-assessable shares of Elanco common stock, no par value per share (the "Stock Consideration"), plus the right to receive cash in lieu of any fractional shares of Elanco common stock, and (B) one contingent value right (a "CVR", and together with the Stock Consideration and the right to receive cash in lieu of any fractional shares of Elanco common stock, the "Merger Consideration") representing the right to receive $0.25 in cash if a specified milestone is achieved, as set forth in the CVR Agreement (as defined and described in the Issuer's 8-K filed on 7/18/2019).

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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