Sec Form 4 Filing - Black Benjamin @ Osiris Acquisition Corp. - 2021-05-13

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 Black Benjamin 2. Issuer Name and Ticker or Trading Symbol Osiris Acquisition Corp. [ OSI] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) CEO & Director (Last) (First) (Middle) C/O APOLLO MANAGEMENT LP, 9 WEST 57TH STREET, 43RD FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 05/13/2021 (Street) NEW YORK, NY10019 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 Common Stock, par value $0.0001 per share ( 1 ) 05/13/2021 J( 2 ) 464,750 ( 2 ) ( 1 ) ( 1 ) Class A Common Stock, par value $0.0001 per share 464,750 ( 1 ) 5,164,625 ( 2 ) I See Footnote ( 3 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Black Benjamin C/O APOLLO MANAGEMENT LP 9 WEST 57TH STREET, 43RD FLOOR NEW YORK, NY10019 X CEO & Director Signatures /s/ Benjamin E. Black 05/17/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The shares of the Issuer's Class B common stock, par value $0.0001 per share (the "Class B Common Stock"), are convertible for the shares of the Issuer's Class A common stock, par value $0.0001 per share, as described under the heading "Description of Securities" in the Issuer's Registration Statement on Form S-1 (File No. 333-254997) (the "Registration Statement") and have no expiration date. ( 2 )On May 13, 2021, the Osiris Sponsor, LLC (the "Sponsor") forfeited 464,750 shares of the Class B Common Stock to the Issuer for no consideration in connection with a reduction in the size of the Issuer's initial public offering, resulting in the Sponsor holding 5,164,625 shares of the Class B Common Stock. The shares of the Class B Common Stock beneficially owned by the Reporting Persons include up to 697,125 shares of Class B Common Stock that are subject to forfeiture to the Issuer depending on the extent to which the underwriters' over-allotment option is exercised in connection with the Issuer's initial public offering of units, as described in the Registration Statement. ( 3 )Consists of shares held directly by the Sponsor. The Sponsor is managed by Fortinbras SPAC Holdings, LLC, a Delaware limited liability company. Fortinbras SPAC Holdings, LLC is managed by Fortinbras Enterprises LP, a Delaware limited partnership ("Fortinbras Enterprises"). Fortinbras Enterprises Holdings LLC, a Delaware limited liability company ("HoldCo") serves as the general partner of Fortinbras Enterprises. Benjamin E. Black is the sole member of HoldCo and as such may be deemed to have voting and dispositive control of the shares of our common stock held of record by Sponsor.

Remarks: The reporting person is a member of a 10% group with Osiris Sponsor, LLC, Fortinbras SPAC Holdings, LLC, Fortinbras Enterprises LP, and Fortinbras Enterprises Holdings LLC.

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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