Sec Form 4 Filing - Abingworth LLP @ Jasper Therapeutics, Inc. - 2022-03-21

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 Abingworth LLP 2. Issuer Name and Ticker or Trading Symbol Jasper Therapeutics, Inc. [ JSPR] 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) PRINCES HOUSE 38 JERMYN STREET 3. Date of Earliest Transaction (MM/DD/YY) 03/21/2022 (Street) LONDON, X0SW1Y 6DN 4. If Amendment, Date Original Filed (MM/DD/YY) 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 Stock Option (right to buy) $ 3.54 03/21/2022 A 78,045 ( 2 ) 03/21/2032 Voting Common Stock 78,045 $ 0 78,045 I See footnotes( 1 )( 2 )( 3 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Abingworth LLP PRINCES HOUSE 38 JERMYN STREET LONDON, X0SW1Y 6DN X Signatures /s/ John Heard 03/23/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Abingworth Bioventures VII GP LP ("Abingworth GP") serves as the general partner of Abingworth Bioventures VII, LP ("ABV VII"). Abingworth General Partner VII LLP serves as the general partner of Abingworth GP. ABV VII (acting by its general partner Abingworth GP, acting by its general partner Abingworth General Partner VII LLP) has delegated to the Reporting Person all investment and dispositive power over the securities held by ABV VII. ( 2 )The option (the "Option") was granted to Kurt von Emster, a director of the Issuer and a member of the investment committee of ABV VII (the "Investment Committee") which approves investment and voting decisions by majority vote. No individual member of the Investment Committee has the sole control or voting power over the securities held by ABV VII. The Option will vest in equal annual installments over three years, commencing on December 7, 2022, subject to the Mr. von Emster's continued service with the Issuer through each vesting date. Under an agreement between Mr. von Emster and the Reporting Person, Mr. von Emster is deemed to hold the Option and any shares of common stock issuable upon exercise of the Option, for the benefit of ABV VII, and must exercise the Option solely upon the direction of the Reporting Person. ( 3 )ABV VII may be deemed the indirect beneficial owner of the Option, and Mr. von Emster may be deemed the indirect beneficial owner of the Option through his indirect interest in ABV VII. Each of ABV VII, Abingworth GP, Abingworth General Partner VII LLP, Mr. von Emster, the Reporting Person and each member of the Investment Committee disclaims beneficial ownership of the Option except to the extent, if any, of its pecuniary interest therein. This report shall not be deemed an admission that the Reporting Person or any other person is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

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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