Exhibit 21.1 
SUBSIDIARIES OF MARA HOLDINGS, INC.

The registrant’s subsidiaries and affiliates as of December 31, 2025 are included in the list below.

Legal Entity NamePercentage of Voting Securities Owned Directly or Indirectly by RegistrantJurisdiction of Organization
Abraj AlSia100%Saudi Arabia
Altitude Leasing Company, LLC100%Delaware
Arkon Energy Hannibal LLC100%Delaware
Aventura Leasing Co., LLC100%Delaware
Crown56 LLC100%Wyoming
Crypto Currency Patent Holding Company, LLC100%Delaware
FSI Marathon Project 1 Holding, Ltd.20%United Arab Emirates
GC Data Center Equity Holdings, LLC100%Delaware
GC Data Center Granbury, LLC100%Delaware
GC Data Center Holdings, LLC100%Delaware
GC Data Center Kearney, LLC100%Delaware
Great Plains Windpark Legacy, LLC100%Delaware
Hancock Leasing Company LLC100%Delaware
Hansford Leasing Company LLC100%Delaware
Hash2 Labs LLC100%Delaware
Magnus IP GMBH100%Germany
MARA Energy Harvesting Corporation100%Delaware
MARA Energy Holdings Co.100%Delaware
MARA Energy LLC100%Saudi Arabia
MARA Energy Trading Co.100%Delaware
MARA Europe SA100%France
MARA France SAS100%France
MARA Garden City LLC100%Delaware
MARA Pool LLC100%Nevada
MARA Tech, Inc.100%Delaware
MARA USA Corporation100%Delaware
MARA Ventures Corporation100%Delaware
MARA-NGON Joint Venture, LLC87%Delaware
Marathon Compute North 1 LLC100%Delaware
Marathon Crypto Mining, Inc.100%Nevada
Marathon Digital Holdings, Ltd.100%United Arab Emirates
Marathon Digital International, Inc.100%Delaware
Marathon Digital Leasing, LLC100%Nevada
Marathon Energy Technology Solutions SPC100%Oman
Marathon IP GMBH100%Germany
Marathon Tech International, Ltd. FZCO100%United Arab Emirates


Medtech GMBH100%Germany
Soems Acquisition Corp.100%Delaware
Sullivan Company Leasing LLC100%Delaware
Swift Business S.A.100%Paraguay
Synchronicity IP GMBH100%Germany
TLIC GMBH100%Germany
ZTM Limited (FZE)20%United Arab Emirates
ZTM Technology (SP) LLC20%United Arab Emirates