X0202 SCHEDULE 13G/A 0001801265 XXXXXXXX LIVE 3 Common Stock, $0.01 par value per share (the "Common Stock") 03/31/2026 0000041719 Magnera Corporation 55939A107 9335 HARRIS CORNERS PKWY SUITE 300 CHARLOTTE NC 28269 Rule 13d-1(c) Madison Avenue International LP E9 0 1590616 0 1590616 1590616 4.4 PN Madison Avenue Partners, LP DE 0 1590616 0 1590616 1590616 4.4 PN EMAI Management, LLC DE 0 1590616 0 1590616 1590616 4.4 OO Madison Avenue GP, LLC DE 0 1590616 0 1590616 1590616 4.4 OO Caraway Jackson Investments LLC DE 0 1590616 0 1590616 1590616 4.4 OO Eli Samaha X1 0 1590616 0 1590616 1590616 4.4 IN Magnera Corporation 9335 Harris Corners Pkwy, Suite 300, Charlotte, NC 28269 The names of the persons filing this statement on Schedule 13G (collectively, the "Reporting Persons") are: * Madison Avenue International LP, * Madison Avenue Partners, LP, * EMAI Management, LLC, * Madison Avenue GP, LLC, * Caraway Jackson Investments LLC, and * Eli Samaha. The principal business address for each of the Reporting Persons is 150 East 58th St, 14th Fl, New York, NY 10155. Madison Avenue International LP is a Cayman Islands exempted limited partnership. Madison Avenue Partners, LP is a Delaware limited partnership. Each of EMAI Management, LLC, Madison Avenue GP, LLC and Caraway Jackson Investments LLC is a Delaware limited liability company. Mr. Samaha is a citizen of the United States of America. N IA As of March 31, 2026, Madison Avenue International LP beneficially owned 1,590,616 shares of Common Stock. Madison Avenue Partners, LP and Madison Avenue GP, LLC, as the investment manager and general partner of Madison Avenue International LP, respectively, may be deemed to be the beneficial owner of the shares of Common Stock owned directly by Madison Avenue International LP. EMAI Management, LLC, as the general partner of Madison Avenue Partners, LP, may be deemed to be the beneficial owner of the shares of Common Stock owned directly by Madison Avenue International LP. Caraway Jackson Investments LLC, as the owner of Madison Avenue GP, LLC, may be deemed to be the beneficial owner of the shares of Common Stock owned directly by Madison Avenue International LP. Mr. Samaha, as the non-member manager of Madison Avenue GP, LLC, the managing member of EMAI Management, LLC, and the majority owner of Caraway Jackson Investments LLC, may be deemed to be the beneficial owner of the shares of Common Stock owned by Madison Avenue International LP. The following percentage is based on 35,900,000 shares of Common Stock outstanding as of February 5, 2026, as disclosed in the Issuer's Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission on February 5, 2026. As of March 31, 2026, the Reporting Persons may be deemed to have beneficially owned approximately 4.4% of the outstanding shares of Common Stock. See Cover Pages Items 5-9. See Cover Pages Items 5-9. See Cover Pages Items 5-9. See Cover Pages Items 5-9. N Y Y Y N See Exhibit A of the Schedule 13G filed by the reporting persons with the Securities and Exchange Commission on November 14, 2024. Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Madison Avenue International LP /s/ Eli Samaha 05/15/2026 Madison Avenue Partners, LP /s/ Eli Samaha 05/15/2026 EMAI Management, LLC /s/ Eli Samaha 05/15/2026 Madison Avenue GP, LLC /s/ Eli Samaha 05/15/2026 Caraway Jackson Investments LLC /s/ Eli Samaha 05/15/2026 Eli Samaha /s/ Eli Samaha 05/15/2026