Exhibit 99.1 Mativ Announces Third Quarter 2025 Results ALPHARETTA, GA, November 5, 2025 -– Mativ Holdings, Inc. ("Mativ" or the "Company") (NYSE: MATV) reported earnings results for the three months ended September 30, 2025. Adjusted measures are reconciled to GAAP at the end of this release. Financial comparisons are versus the prior year period unless stated otherwise. Figures may not sum to total due to rounding. Mativ Third Quarter 2025 Highlights Management Commentary "We delivered one of our stronges ...