MARA Holdings, Inc.
MX ˙ BMV ˙ US5657881067
SecurityMX:MARA / MARA Holdings, Inc.
InstitutionComerica Bank
Latest Disclosed Ownership81,714 shares
Latest Disclosed Value $ 733,792
Comerica Bank reports 22.02% decrease in ownership of MARA / MARA Holdings, Inc.

On January 29, 2026 - Comerica Bank filed a 13F-HR form disclosing ownership of 81,714 shares of MARA Holdings, Inc. (MX:MARA) valued at $733,792 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 104,784 shares of MARA Holdings, Inc.. This represents a change in shares of -22.02% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-01-29 2025-12-31 13F MARA HOLDINGS COM 565788106 81,714 -23,070 -22.02 734 -61.68 0.0029
2025-11-14 2025-09-30 13F MARA HOLDINGS COM 565788106 104,784 -15,546 -12.92 1,913 1.43 0.0072
2025-08-14 2025-06-30 13F MARA HOLDINGS COM 565788106 120,330 -348,537 -74.34 1,887 -65.02 0.0073
2025-05-14 2025-03-31 13F MARA HOLDINGS COM 565788106 468,867 356,219 316.22 5,392 185.39 0.0226
2025-02-14 2024-12-31 13F/A-1 MARA HOLDINGS COM 565788106 112,648 9,345 9.05 1,889 12.78 0.0076
2025-02-14 2024-12-31 13F MARA HOLDINGS COM 565788106 112,648 9,345 1,889 0.0063
2024-11-14 2024-09-30 13F MARA HOLDINGS COM 565788106 103,303 3,647 3.66 1,676 -15.32 0.0066
2024-08-15 2024-06-30 13F MARATHON DIGITAL HOLDINGS INC COM COMMON 565788106 99,656 99,129 18,810.06 1,978 17,881.82 0.0082
2024-05-16 2024-03-31 13F MARATHON DIGITAL HOLDINGS COMMON 565788106 527 527 12 0.0001
2024-02-14 2023-12-31 13F MARATHON DIGITAL HOLDINGS IN COMMON 565788106 0 -590 -100.00 0 -100.00
2023-11-21 2023-09-30 13F MARATHON DIGITAL HOLDINGS IN COMMON 565788106 590 590 5 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.