X0609 4 2026-06-01 0 0001988894 Amer Sports, Inc. AS 0001631478 Haselden Stuart true C/O AMER SPORTS, INC. CRICKET SQUARE, HUTCHINS DR, PO BOX 2681 GRAND CAYMAN E9 KY1-1111 CAYMAN ISLANDS 0 1 0 0 CEO of Arc'teryx Equipment 0 Ordinary Shares 2026-06-01 4 M 0 200000 12.51 A 215275 D Ordinary Shares 2026-06-01 4 S 0 200000 35.578 D 15275 D Ordinary Shares 2026-06-01 4 S 0 15275 35.4282 D 0 D Stock Option (Right to Buy) 12.51 2026-06-01 4 M 0 200000 0 D 2029-11-27 Ordinary Shares 200000 499982 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.32 to $35.89, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.33 to $35.53, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Reflects vested stock options to purchase ordinary shares of the Issuer granted on January 16, 2021 pursuant to the Amer Sports, Inc. 2019 Stock Option Plan Rules (as amended from time to time, the "2019 ESOP"). These stock options became fully vested and exercisable on February 1, 2024. /s/ Sara Bucholtz, as attorney-in-fact 2026-06-02