X0508 4 2024-07-01 0001167419 Riot Platforms, Inc. RIOT 0001833575 Marleau Hubert C/O RIOT PLATFORMS, INC. 3855 AMBROSIA STREET, SUITE 301 CASTLE ROCK CO 80109 true false false false 0 Common Stock 2024-07-01 4 A 0 24000 0 A 83861 D Represents the unvested award of restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2019 Equity Incentive Plan, as amended, (the "Equity Plan") as of the indicated date, in connection with service on the Issuer's Board of Directors through July 1, 2025. Each RSU represents the contingent right to receive one share of the Issuer's common stock, no par value per share ("Common Stock"), upon vesting and settlement by the Issuer. According to the equity award agreement covering the award, the RSUs are eligible to vest, if at all, in four equal quarterly tranches after the grant date, subject to the Reporting Person's continued service with the Issuer through vesting. Number of shares beneficially owned by the Reporting Person has been adjusted up by one share of Common Stock to correct for a rounding error in the previously reported total. /s/ Alexander K. Travis, Attorney-in-Fact for Hubert Marleau 2024-07-03