144 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

650000 1157000.00 23049000 05/28/2026 NASDAQ Common Stock 10/19/2022 Open Market Purchases N/A N 650000 10/19/2022 Cash Y Stadium Capital Management, LLC is the investment advisor of certain funds that are selling the shares. 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. 05/28/2026 /s/ Alexander M. Seaver