Mativ Holdings (MATV) director reports new deferred phantom stock units

Rhea-AI Filing Summary

Mativ Holdings, Inc. director William M. Cook reported updated holdings and deferred compensation activity. As of a transaction dated 01/01/2026, he directly owns 26,436 shares of Mativ common stock.

Cook also received additional phantom stock units under the company’s Non-Employee Directors Deferred Compensation Plan. He acquired 306 phantom stock units representing in-kind dividends and 793 phantom stock units representing deferred quarterly cash and committee meeting retainers, each linked to Mativ common stock. Following these transactions, he beneficially owns 58,023 phantom stock units, which are scheduled to convert into common stock upon the earlier of his retirement from the Board or termination as a director.

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

OMB APPROVAL

OMB Number:			3235-0287
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hours per response:			0.5

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^*

COOK WILLIAM M

(Last) (First) (Middle)

MATIV HOLDINGS

100 KIMBALL PLACE, STE 600

(Street)

ALPHARETTA GA 30009

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Mativ Holdings, Inc. [ MATV ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
01/01/2026

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								26,436	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
Phantom Stock(1)	$0.00	01/01/2026		A		306		(2)	(2)	Common Stock	306	$12.49	57,230	D
Phantom Stock(3)	$0.00	01/01/2026		A		793		(2)	(2)	Common Stock	793	$11.82	58,023	D

Explanation of Responses:

1. Represents in-kind dividends credited pursuant to the Director's election under the Non-Employee Directors Deferred Compensation Plan.

2. Stock units are converted to stock upon the earlier of retirement from the Board or termination as a Director in accordance with the Company's Non-Employee Directors Deferred Compensation Plan.

3. Represents quarterly cash and committee meeting retainers deferred pursuant to the Director's election in accordance with the Non-Employee Directors Deferred Compensation Plan.

Remarks:

	/s/ Brian Park, attorney-in-fact for William M. Cook, principal	01/05/2026
	** 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider activity did Mativ Holdings (MATV) report in this filing?

The filing reports director William M. Cook updating his holdings, including additional phantom stock units credited under Mativ’s Non-Employee Directors Deferred Compensation Plan as of 01/01/2026.

How many Mativ Holdings (MATV) common shares does the director own directly?

Following the reported transactions, the director directly owns 26,436 shares of Mativ Holdings, Inc. common stock.

What phantom stock transactions were reported for Mativ Holdings (MATV) director?

The director acquired 306 phantom stock units from in-kind dividends and 793 phantom stock units from deferred cash and committee meeting retainers, all tied to Mativ common stock.

How many phantom stock units does the Mativ (MATV) director now beneficially own?

After these transactions, the director beneficially owns 58,023 phantom stock units linked to Mativ Holdings, Inc. common stock.

When will the Mativ Holdings (MATV) phantom stock units convert to common stock?

The filing states that the stock units are converted to stock upon the earlier of the director’s retirement from the Board or termination as a Director, in accordance with the Non-Employee Directors Deferred Compensation Plan.

What plan governs the deferred compensation reported for Mativ Holdings (MATV)?

The reported in-kind dividends and deferred retainers are credited under the company’s Non-Employee Directors Deferred Compensation Plan, based on the director’s elections.