Sec Form 4 Filing - Reisenauer Mark L @ Assertio Holdings, Inc. - 2025-01-02

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 Reisenauer Mark L 2. Issuer Name and Ticker or Trading Symbol Assertio Holdings, Inc. [ ASRT] 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) ASSERTIO HOLDINGS, INC., 100 SOUTH SAUNDERS ROAD, SUITE 300 3. Date of Earliest Transaction (MM/DD/YY) 01/02/2025 (Street) LAKE FOREST, IL60045 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 01/02/2025 A 53,750 ( 1 ) A $ 0 53,750 D

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) $ 0.85 01/02/2025 A 81,225 ( 2 ) 01/02/2035 Common Stock 81,225 $ 0 ( 3 ) 81,225 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Reisenauer Mark L ASSERTIO HOLDINGS, INC. 100 SOUTH SAUNDERS ROAD, SUITE 300 LAKE FOREST, IL60045 X Signatures /s/ Sam Schlessinger, Attorney-in-fact for Mark L. Reisenauer 01/03/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Restricted stock units were granted on the date of Mr. Reisenauer's initial appointment to the Issuer's Board of Directors in accordance with the Issuer's Nonemployee Director Compensation & Grant Policy. One-third of these restricted stock units are scheduled to vest on each of January 2, 2026, 2027 and 2028, assuming continued service through the applicable vesting date. ( 2 )Stock options were granted on the date of Mr. Reisenauer's initial appointment to the Issuer's Board of Directors in accordance with the Issuer's Nonemployee Director Compensation & Grant Policy. One-third of these stock options are scheduled to vest on each of January 2, 2026, 2027 and 2028, assuming continued service through the applicable vesting date. ( 3 )These derivative securities were granted to the reporting person, and were not sold to the reporting person. As such, the reporting person did not pay any consideration for these derivative securities.

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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