Rockwell Medical (RMTI) COO has shares withheld for RSU tax payment

Rhea-AI Filing Summary

ROCKWELL MEDICAL, INC. Chief Operating Officer Heather Hunter reported a routine tax-related share disposition. On the vesting of restricted stock units, 2,444 shares of common stock were withheld at $0.90 per share to cover estimated tax obligations. After this withholding, she held 130,079 common shares directly.

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Hunter Heather

(Last) (First) (Middle)

ROCKWELL MEDICAL, INC.

30142 WIXOM ROAD

(Street)

WIXOM MI 48393

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ROCKWELL MEDICAL, INC. [ RMTI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Operating Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/14/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	03/14/2026		F(1)		2,444	D	$0.9	130,079	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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. These shares were withheld from the vesting of restricted stock units to cover the estimated tax withholding obligation.

Remarks:

	s/ Megan Timmins, Attorney-in-Fact for Heather Hunter	03/16/2026
	** Signature of Reporting Person	Date
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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FAQ

What insider transaction did ROCKWELL MEDICAL (RMTI) report for Heather Hunter?

Heather Hunter, Chief Operating Officer of ROCKWELL MEDICAL, reported a tax-related share disposition. On restricted stock unit vesting, 2,444 common shares were withheld at $0.90 each to cover estimated tax obligations, leaving her with 130,079 common shares held directly afterward.

Was the ROCKWELL MEDICAL (RMTI) insider transaction an open-market sale?

No, the transaction was not an open-market sale. The Form 4 shows 2,444 shares of common stock were withheld to satisfy estimated tax withholding obligations tied to restricted stock unit vesting, rather than being sold in the open market for discretionary liquidity.

How many ROCKWELL MEDICAL (RMTI) shares does Heather Hunter hold after this Form 4?

Following the tax-withholding disposition, Heather Hunter directly holds 130,079 shares of ROCKWELL MEDICAL common stock. The filing indicates only 2,444 shares were withheld for taxes on restricted stock unit vesting, with no additional acquisitions or open-market sales reported in this Form 4.

What does transaction code F mean in the ROCKWELL MEDICAL (RMTI) Form 4?

Transaction code F indicates shares used to pay an exercise price or tax liability. In this ROCKWELL MEDICAL filing, 2,444 common shares were withheld to cover estimated tax obligations related to restricted stock unit vesting, rather than representing a voluntary market purchase or sale.

What was the price per share for the tax-withholding in the RMTI insider filing?

The tax-withholding disposition used a reference price of $0.90 per share. ROCKWELL MEDICAL’s Form 4 reports 2,444 common shares withheld at this price to satisfy estimated tax obligations arising from the vesting of restricted stock units held by Chief Operating Officer Heather Hunter.