X0607 3 2026-08-01 1 0001507605 MARA Holdings, Inc. MARA 0002148190 Hart Craig A. false C/O MARA HOLDINGS, INC. 1010 SOUTH FEDERAL HIGHWAY, SUITE 2700 HALLANDALE BEACH FL 33009 1 0 0 0 Exhibit 24.1 - Power of Attorney /s/ Zabi Nowaid, Attorney-in-Fact for Craig A. Hart 2026-08-10