瑪拉控股有限公司
MX ˙ BMV ˙ US5657881067
SecurityMX:MARA / MARA Holdings, Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership150,209 shares
Latest Disclosed Value $ 1,224,954
Janus Henderson Group Plc ownership in MARA / MARA Holdings, Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 150,209 shares of MARA Holdings, Inc. (MX:MARA) valued at $1,224,954 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 150,209 shares of MARA Holdings, Inc.. This represents a change in shares of 0.00% 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)
2026-05-18 2026-03-31 13F/A-1 MARA HOLDINGS COM 565788106 150,209 0 0.00 1,225 -9.27 0.0002
2026-05-15 2026-03-31 13F MARA HOLDINGS COM 565788106 150,209 0 0.00 1,225 -9.27 0.0002
2026-02-17 2025-12-31 13F MARA HOLDINGS COM 565788106 150,209 0 0.00 1,350 -50.80 0.0006
2025-11-14 2025-09-30 13F MARA HOLDINGS COM 565788106 150,209 0 0.00 2,742 16.63 0.0013
2025-08-14 2025-06-30 13F MARA HOLDINGS COM 565788106 150,209 0 0.00 2,352 25.72 0.0012
2025-05-15 2025-03-31 13F MARA HOLDINGS COM 565788106 150,209 16,600 12.42 1,871 -16.52 0.0010
2025-02-14 2024-12-31 13F MARA HOLDINGS COM 565788106 133,609 9,400 7.57 2,241 11.28 0.0011
2024-11-14 2024-09-30 13F MARA HOLDINGS COM 565788106 124,209 0 0.00 2,013 -18.27 0.0010
2024-08-14 2024-06-30 13F MARATHON DIGITAL HOLDINGS IN COM 565788106 124,209 23,552 23.40 2,464 8.45 0.0013
2024-05-15 2024-03-31 13F MARATHON DIGITAL HOLDINGS IN COM 565788106 100,657 91 0.09 2,271 -3.81 0.0012
2024-02-14 2023-12-31 13F MARATHON DIGITAL HOLDINGS IN COM 565788106 100,566 22,256 28.42 2,362 255.57 0.0014
2023-11-14 2023-09-30 13F MARATHON DIGITAL HOLDINGS IN COM 565788106 78,310 44 0.06 664 -38.75 0.0004
2023-08-14 2023-06-30 13F MARATHON DIGITAL HOLDINGS IN COM 565788106 78,266 31,538 67.49 1,084 167.00 0.0007
2023-05-15 2023-03-31 13F MARATHON DIGITAL HOLDINGS IN COM 565788106 46,728 26,647 132.70 407 497.06 0.0003
2023-02-14 2022-12-31 13F MARATHON DIGITAL HOLDINGS IN COM 565788106 20,081 0 0.00 69 -68.52 0.0000
2023-01-13 2022-09-30 13F/A-1 MARATHON DIGITAL HOLDINGS IN COM 565788106 20,081 28 0.14 216 101.87 0.0002
2022-11-14 2022-09-30 13F MARATHON DIGITAL HOLDINGS IN COM 565788106 20,081 28 216 0.0001
2022-08-15 2022-06-30 13F MARATHON DIGITAL HOLDINGS IN COM 565788106 20,053 0 0.00 107 -80.89 0.0001
2022-05-16 2022-03-31 13F MARATHON DIGITAL HOLDINGS IN COM 565788106 20,053 22 0.11 560 -14.89 0.0003
2022-02-14 2021-12-31 13F MARATHON DIGITAL HOLDINGS IN COM 565788106 20,031 10,065 100.99 658 108.89 0.0003
2021-11-16 2021-09-30 13F MARATHON DIGITAL HOLDINGS IN COM 565788106 9,966 9,966 315 0.0001
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.