X0508 4 2025-07-11 0001167419 Riot Platforms, Inc. RIOT 0002056359 Mouton Douglas C/O RIOT PLATFORMS, INC. 3855 AMBROSIA STREET, SUITE 301 CASTLE ROCK CO 80109 true false false false 0 Common Stock 2025-07-11 4 A 0 16103 0 A 36487 D Represents an award of restricted shares of the Issuer's common stock, no par value per share, granted to the Reporting Person under the Issuer's 2019 Equity Incentive Plan, as amended, as of the indicated date, in connection with service on the Issuer's Board of Directors through June 30, 2026. These shares are eligible to vest, if at all, in four approximately equal tranches on September 30, 2025, December 31, 2025, March 31, 2026, and June 30, 2026, subject to the Reporting Person's continued service with the Issuer through the applicable vesting dates. s/ Tanya McGill, Attorney-in-Fact for Douglas Mouton 2025-07-15