144/A 0000921895-26-001491 0001105087 XXXXXXXX LIVE 0000827187 Sleep Number Corp 000-25121 1001 THIRD AVENUE SOUTH MINNEAPOLIS MN 55404 7635517000 STADIUM CAPITAL MANAGEMENT LLC 10% Stockholder Common Stock StoneX Group, Inc.

230 Park Ave 10th Floor New York NY 10169

1300000 2314000.00 23049000 05/28/2026 NASDAQ Common Stock 10/19/2022 Open Market Purchases N/A N 1300000 10/19/2022 Cash N Stadium Capital Management, LLC

199 Elm Street New Canaan CT 06840

Common Stock 05/28/2026 390676 695053.08 Stadium Capital Management, LLC is the investment advisor of certain funds that are selling the shares. This Form 144 is being amended to update the amount of securities to be sold as reported in the original Form 144, which was filed on 05/28/2026. Of the 1,300,000 shares to be sold as reported in this amended Form 144, 390,676 shares were sold on the date of the original Form 144. See Securities Sold During the Past 3 Months for additional information. The aggregate market value is as of the close of business on 05/27/2026. The number of securities outstanding is as of 04/04/2026. The approximate date of sale is between 05/28/2026 through 08/28/2026. The shares proposed to be sold were acquired and paid for between 10/29/2022 and 09/15/2023. 05/29/2026 /s/ Alexander M. Seaver