Mativ Holdings, Inc. — Proxy Solicitation & Information Statement 2025

Mar 21, 2025

DEFA14A 1 ny20042450x2_defa14a.htm DEFA14A Licensed to: Broadridge Document created using Broadridge PROfile 25.1.1.5279 Copyright 1995 - 2025 Broadridge

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934 (Amendment No. )

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

Preliminary Proxy Statement ☐

Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐

Definitive Proxy Statement ☐

Definitive Additional Materials ☒

Soliciting Material under §240.14a-12 ☐

Mativ Holdings, Inc.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

No fee required. ☒

Fee paid previously with preliminary materials. ☐

Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a6(i)(1) and 0-11. ☐