X0609 4/A 2025-05-29 2025-05-30 0000041719 Magnera Corp MAGN 0001436840 Brown Bruce false 9335 HARRIS CORNERS PKWY SUITE 300 CHARLOTTE NC 28269 1 0 Common Stock, Par Value $.01 2025-05-29 4 P 0 4235 11.8054 A 16555 D Reports correction of shares purchased on May 29, 2025. Includes 4,523 shares of common stock held by the Bruce Brown Revocable Trust which were previously reported as indirectly owned. /s/ Laura A. Jones, attorney-in-fact for Bruce Brown 2026-10-19