Sec Form 4/A Filing - Strobeck Mark @ ROCKWELL MEDICAL, INC. - 2025-05-20

FORM 4/A 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 Strobeck Mark 2. Issuer Name and Ticker or Trading Symbol ROCKWELL MEDICAL, INC. [ RMTI] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) President and CEO (Last) (First) (Middle) C/O ROCKWELL MEDICAL, INC., 30142 WIXOM ROAD 3. Date of Earliest Transaction (MM/DD/YY) 05/20/2025 (Street) WIXOM, MI48393 4. If Amendment, Date Original Filed (MM/DD/YY) 05/21/2025 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 Performance-based restricted stock units ( 1 ) 05/20/2025 A( 1 ) 352,000 ( 1 ) 05/20/2028 Common Stock 352,000 $ 0 352,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Strobeck Mark C/O ROCKWELL MEDICAL, INC. 30142 WIXOM ROAD WIXOM, MI48393 X President and CEO Signatures /s/ Megan Timmins, Attorney-in-Fact for Mark Strobeck 04/17/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )These are performance-based restricted stock units ("PSU") with terms as follows. The term of each PSU award runs from the grant date through the third anniversary of the grant date. Any unvested PSUs remaining after the third anniversary will be cancelled. The performance period for the award is the same three-year period. PSUs will vest on or after the first anniversary of the grant date only if the stock price meets the performance hurdle. The performance hurdle is met if the average closing price of the Company's common stock over any 60 consecutive trading days during the performance period equals two times the base price. The base price was calculated as the average closing price over the ten trading days ending on the trading day prior to the grant date and is $2.14 for this award.

Remarks: This award was inadvertently omitted from the original Form 4.

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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