X0202 SCHEDULE 13G/A 0001104659-25-044671 0002021298 XXXXXXXX LIVE 2 Common Stock 03/25/2026 0000827187 Sleep Number Corp. 83125X103 1001 Third Avenue South Minneapolis MN 55404 M Partners Fund LP DE 0.00 0.00 0.00 0.00 0.00 N 0 PN M Partners Fund (GP) LLC DE 0.00 0.00 0.00 0.00 0.00 N 0 OO Ali John Mirshekari X1 0.00 0.00 0.00 0.00 0.00 N 0 IN M Partners Fund LP is a Delaware limited partnership whose sole general partner is M Partners Fund (GP) LLC. The managing member of M Partners Fund (GP) LLC is Ali John Mirshekari. As a result, Ali John Mirshekari is deemed to be the indirect owner of the shares held directly by M Partners Fund LP. Despite such shared beneficial ownership, the Reporting Persons disclaim that they constitute a statutory group within the meaning of Rule 13d-5(b)(1) of the Securities Exchange Act of 1934. Based on the 22,864,000 shares of common stock, par value $0.01 per share, outstanding as of January 31, 2026, as reported in the Form 10-K for the annual period ended January 3, 2026, of Sleep Number Corporation. Sleep Number Corp. 1001 Third Avenue South, Minneapolis, MN 55404 This Schedule is filed by M Partners Fund LP, M Partners Fund (GP) LLC and Ali John Mirshekari. The principal business address of the Reporting Persons is 24 Shipyard Drive, Suite 102, Hingham, MA 02043. M Partners Fund LP is a Delaware limited partnership. M Partners Fund (GP) LLC is a Delaware limited liability company. Ali John Mirshekari is a citizen of the United States of America. Y 0 0 0 0 0 0 N Y Y Y Y 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. M Partners Fund LP /s/ Ali John Mirshekari 03/27/2026 M Partners Fund (GP) LLC /s/ Ali John Mirshekari 03/27/2026 Ali John Mirshekari /s/ Ali John Mirshekari 03/27/2026