Sec Form 4/A Filing - HUNT RONALD @ Harpoon Therapeutics, Inc. - 2019-02-07

FORM 4/A 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 HUNT RONALD 2. Issuer Name and Ticker or Trading Symbol Harpoon Therapeutics, Inc. [ HARP] 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 NEW LEAF VENTURES, 7 TIMES SQUARE, SUITE 3502 3. Date of Earliest Transaction (MM/DD/YY) 02/07/2019 (Street) NEW YORK, NY10036 4. If Amendment, Date Original Filed (MM/DD/YY) 02/14/2019 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ 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

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 Director Stock Option (Right to Buy) $ 14 02/07/2019 A 4,923 ( 1 ) ( 2 ) 02/06/2029 Common Stock 4,923 $ 0 4,923 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other HUNT RONALD C/O NEW LEAF VENTURES 7 TIMES SQUARE, SUITE 3502 NEW YORK, NY10036 X X Signatures /s/ Ronald Hunt by Christopher Whitmore, Attorney-in-Fact 03/29/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This stock option, which was granted on February 7, 2019, was omitted from the Reporting Person's original Form 4. ( 2 )The stock option vests and becomes exercisable as to 25% of the shares subject to the option on the last day of each calendar quarter following the grant date of February 7, 2019 (on March 31, 2019, June 30, 2019, September 30, 2019, and December 31, 2019), subject to the continuous service of the Reporting Person on each vesting date.

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).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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