X0206 3 2025-06-01 1 0001167419 Riot Platforms, Inc. RIOT 0002071620 Gibbs Jonathan C/O RIOT PLATFORMS, INC. 3855 AMBROSIA STREET, SUITE 301 CASTLE ROCK CO 80109 false true false false CDCO (See Remarks) Effective as of June 1, 2025, the Reporting Person was appointed to serve as the Issuer's Chief Data Center Officer ("CDCO"). /s/ Jamie Amentler, Attorney-in-Fact for Jonathan Gibbs 2025-06-11