Investor relations

Investor Relations Department

Mativ Holdings, Inc.

100 Kimball Place, Suite 600

Alpharetta, GA 30009

Stock transfer agent

Computershare

P.O. Box 505000

Louisville, KY 40233

Contact Center:

Toll Free U.S. and Canada:

(877) 498-8847

For the hearing impaired:

(800) 231-5469

Foreign shareholders:

(201) 680-6578

TDD foreign shareholders:

(201) 680-6610

1099-DIV replacement

Please call Computershare Shareowner Services at:

Phone: (877) 498-8847