Sec Form 4 Filing - Bjorklund Hakan @ Organogenesis Holdings Inc. - 2018-12-10

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 Bjorklund Hakan 2. Issuer Name and Ticker or Trading Symbol Organogenesis Holdings Inc. [ ORGO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O AVISTA HEALTHCARE PUBLIC ACQUISITION, CORP. 65 EAST 55TH STREET, 18TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 12/10/2018 (Street) NEW YORK, NY10022 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 Class B Ordinary Shares ( 1 ) 12/10/2018 D( 2 ) 243,896 ( 1 ) ( 1 ) Class A Ordinary Shares 243,896 ( 2 ) 69,571 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Bjorklund Hakan C/O AVISTA HEALTHCARE PUBLIC ACQUISITION CORP. 65 EAST 55TH STREET, 18TH FLOOR NEW YORK, NY10022 X Signatures /s/ Benjamin Silbert, Attorney-in-Fact 12/12/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of Avista Healthcare Public Acquisition Corp. (the "Issuer"), the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date. ( 2 )243,896 Class B ordinary shares were forfeited to the Issuer for no consideration prior to the closing of the Business Combination.

Remarks: In connection with the closing of the Business Combination, the Issuer's name was changed to Organogenesis Holdings Inc.

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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