Sec Form 4 Filing - SULLIVAN TIMOTHY P @ Option Care Health, Inc. - 2021-12-17

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 SULLIVAN TIMOTHY P 2. Issuer Name and Ticker or Trading Symbol Option Care Health, Inc. [ OPCH] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) X __ Other (specify below) Former 10% Owner (Last) (First) (Middle) C/O MADISON DEARBORN PARTNERS, LLC, 70 W MADISON STREET, SUITE 4600 3. Date of Earliest Transaction (MM/DD/YY) 12/17/2021 (Street) CHICAGO, IL60602 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, par value $0.0001 47,249 D( 1 ) Common Stock, par value $0.0001 12/17/2021 J( 2 ) 37,247,092( 3 ) D 0 I( 4 )( 5 ) See footnotes( 4 )( 5 )

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 SULLIVAN TIMOTHY P C/O MADISON DEARBORN PARTNERS, LLC 70 W MADISON STREET, SUITE 4600 CHICAGO, IL60602 X Former 10% Owner Signatures /s/ Annie Terry, by power of attorney 12/20/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Timothy P. Sullivan disclaims beneficial ownership of the shares of common stock. ( 2 )In connection with the merger transaction on December 17, 2021 (the "Reorganization Merger"), an affiliate of Walgreens Boots Alliance, Inc. acquired control over HC Group Holdings I, LLC, a Delaware limited liability company ("HC I"), which directly held 37,247,092 shares of the Issuer's Common Stock (the "HC I Shares") as previously reflected on the Reporting Person's filings. As a result of the Reorganization Merger, the Reporting Person ceased to have voting or dispositive power over the HC I Shares but experienced no change in pecuniary interest because the Reporting Person had no pecuniary interest in the HC I Shares. ( 3 )Consists of 37,247,092 shares of common stock held by HC I. ( 4 )MDP HC Holdings, LLC ("MDP HC") was formerly the controlling equityholder of HC I. Madison Dearborn Capital Partners VI-A, L.P. ("MDCP VI-A") is a controlling equityholder and Manager of MDP HC. Madison Dearborn Partners VI-A&C, L.P. ("MDP VI-A&C") is the general partner of MDCP VI-A. Madison Dearborn Partners, LLC ("MDP LLC") is the general partner of MDP VI-A&C. Elizabeth Q. Betten and Mr. Sullivan are Managing Directors of MDP LLC, limited partners of MDP VI-A&C, served on the board of managers of HC I and serve on the board of directors of Option Care Health, Inc. Paul J. Finnegan and Samuel M. Mencoff are the sole members of a limited partner committee that (by majority vote) controls investment decisions of shares held directly by MDCP VI-A. ( 5 )(Continued from Footnote 4) By virtue of the relationships described in this footnote, Ms. Betten and Messrs. Sullivan, Finnegan and Mencoff may be deemed to exercise voting and dispositive power with respect to the reported securities. Each of Mr. Finnegan, Mr. Mencoff, Mr. Sullivan, Ms. Betten, MDP LLC, MDP VI-A&C, MDCP VI-A and MDP HC disclaims beneficial ownership of the reported securities except to the extent of its pecuniary interest therein.

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