X0609 4 2026-04-12 1 0001167419 Riot Platforms, Inc. RIOT 0002071620 Gibbs Jonathan false C/O RIOT PLATFORMS, INC. 3855 AMBROSIA STREET, SUITE 301 CASTLE ROCK CO 80109 false true false false CDCO (See Remarks) 0 Common Stock 2026-04-12 4 D 0 1147910 0 D 84989 D Reflects restricted shares of the Issuer's common stock forfeited by the Reporting Person pursuant to the terms of the applicable equity award agreements and the mutual Separation Agreement and General Release, dated April 12, 2026. Effective as of April 12, 2026, the Reporting Person has departed from his position as the Issuer's Chief Data Center Officer. /s/ Jamie Amentler, Attorney-in-Fact for Jonathan Gibbs 2026-04-14