Sec Form 3 Filing - Abingworth LLP @ Jasper Therapeutics, Inc. - 2021-09-24

FORM 3 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) 09/24/2021 (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 Common Stock 5,628,558 ( 1 ) I By Abingworth Bioventures VII, LP ( 2 )

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 Abingworth LLP PRINCES HOUSE 38 JERMYN STREET LONDON, X0SW1Y 6DN X Signatures /s/ John Heard 10/01/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On September 24, 2021, pursuant to that certain Business Combination Agreement, dated as of May 5, 2021, by and among the Issuer (f/k/a Amplitude Healthcare Acquisition Corporation), Ample Merger Sub, Inc. ("Merger Sub"), and Jasper Therapeutics, Inc. ("Old Jasper"), Merger Sub merged with and into Old Jasper with Old Jasper surviving as a wholly owned subsidiary of the Issuer (the "Business Combination"). Prior to the consummation of the Business Combination (the "Effective Time"), each share of Series A-1 preferred stock of Old Jasper was converted into Class A common stock of Old Jasper. At the Effective Time, each issued and outstanding share of Class A common stock of Old Jasper was automatically cancelled and extinguished and converted into shares of common stock of the Issuer (the "Shares"). Represents 4,878,558 Shares acquired in the Business Combination and 750,000 Shares acquired in the private placement which closed concurrently with the Business Combination. ( 2 )The securities of the Issuer are held by Abingworth Bioventures VII, LP ("Abingworth"). Abingworth Bioventures VII GP LP ("Abingworth GP") serves as the general partner of Abingworth. Abingworth General Partner VII LLP, serves as the general partner of Abingworth GP. Abingworth (acting by its general partner Abingworth GP, acting by its general partner Abingworth General Partner VII LLP) has delegated to Abingworth LLP ("ALLP"), all investment and dispositive power over the securities held by Abingworth. ALLP holds the reported securities indirectly through Abingworth. ALLP disclaims beneficial ownership of such securities, except to the extent of its pecuniary interest therein. This report shall not be deemed an admission that the reporting person, Abingworth 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.

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