Who owns Marathon Digital Holdings (MARA)
Which tracked institutional funds hold MARA, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MARA company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on MARA is one-sided between 2026-Q1 and 2026-Q2: 149 added or opened and 42 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
MARA’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes MARA more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in MARA divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 384 tracked filers holding MARA, 228 increased or opened the position and 189 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in MARA between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 29
- HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND$47M
- SEGALL BRYANT & HAMILL, LLC$38M
- CANADA PENSION PLAN INVESTMENT BOARD$32M
- WOLVERINE ASSET MANAGEMENT LLC$24M
- Bitwise Funds Trust$23M
- Alberta Investment Management Corp$17M
Full exits 29
- NORGES BANK$36M
- HRT FINANCIAL LP$33M
- Capital Research Global Investors$27M
- Point72 Asset Management, L.P.$19M
- MARSHALL WACE, LLP$7M
- Marathon Trading Investment Management LLC$6M
Largest adds
- BlackRock, Inc.$540M
- VANGUARD PORTFOLIO MANAGEMENT LLC$165M
- D. E. Shaw & Co., Inc.$133M
- GEODE CAPITAL MANAGEMENT, LLC$104M
- STATE STREET CORP$97M
- VANGUARD CAPITAL MANAGEMENT LLC$96M
Largest trims
- CITADEL ADVISORS LLC$7M
- IMC-Chicago, LLC$5M
- Focus Partners Wealth$3M
- LPL Financial LLC$2M
- Caption Management, LLC$1M
- EverSource Wealth Advisors, LLC$1M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 64,095,643 | $890M | 23.5% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 27,399,926 | $381M | 10.1% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 16,544,675 | $230M | 6.1% | 2026-Q2 |
| STATE STREET CORP added | 15,901,746 | $221M | 5.8% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 10,872,917 | $188M | 5.0% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 10,376,069 | $144M | 3.8% | 2026-Q2 |
| Marex Group Ltd trimmed | 7,953,008 | $110M | 2.9% | 2026-Q2 |
| MORGAN STANLEY added | 6,766,861 | $94M | 2.5% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 6,100,582 | $85M | 2.2% | 2026-Q2 |
| UBS Group AG trimmed | 5,579,055 | $77M | 2.0% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 4,977,949 | $69M | 1.8% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 4,727,923 | $66M | 1.7% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 4,513,153 | $63M | 1.7% | 2026-Q2 |
| NORTHERN TRUST CORP added | 3,702,048 | $51M | 1.4% | 2026-Q2 |
| VAN ECK ASSOCIATES CORP trimmed | 3,473,797 | $48M | 1.3% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND added | 3,354,830 | $47M | 1.2% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 3,336,026 | $46M | 1.2% | 2026-Q2 |
| SEGALL BRYANT & HAMILL, LLC new | 2,756,177 | $38M | 1.0% | 2026-Q2 |
| Bank of New York Mellon Corp added | 2,684,354 | $37M | 1.0% | 2026-Q2 |
| Clear Street Group Inc. added | 2,653,400 | $37M | 1.0% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 2,569,038 | $36M | 0.9% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 2,520,536 | $35M | 0.9% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 2,491,920 | $35M | 0.9% | 2026-Q2 |
| Quadrature Capital Ltd added | 2,392,374 | $33M | 0.9% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD new | 2,318,200 | $32M | 0.9% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 1,842,827 | $26M | 0.7% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 1,816,208 | $25M | 0.7% | 2026-Q2 |
| Public Sector Pension Investment Board added | 1,814,680 | $25M | 0.7% | 2026-Q2 |
| Vident Advisory, LLC added | 1,802,838 | $25M | 0.7% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 1,711,986 | $24M | 0.6% | 2026-Q2 |
| BARCLAYS PLC added | 1,702,031 | $24M | 0.6% | 2026-Q2 |
| WOLVERINE ASSET MANAGEMENT LLC added | 1,694,207 | $24M | 0.6% | 2026-Q2 |
| Bitwise Funds Trust new | 1,625,386 | $23M | 0.6% | 2026-Q2 |
| EXCHANGE TRADED CONCEPTS, LLC trimmed | 1,525,531 | $21M | 0.6% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL added | 1,479,564 | $21M | 0.5% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. added | 1,333,571 | $19M | 0.5% | 2026-Q2 |
| Invesco Ltd. trimmed | 1,271,410 | $18M | 0.5% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 1,232,023 | $17M | 0.5% | 2026-Q2 |
| Alberta Investment Management Corp new | 1,212,100 | $17M | 0.4% | 2026-Q2 |
| Tidal Investments LLC added | 1,151,942 | $16M | 0.4% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. added | 1,134,250 | $16M | 0.4% | 2026-Q2 |
| Nuveen, LLC added | 1,116,089 | $16M | 0.4% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 1,111,938 | $15M | 0.4% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 1,059,698 | $15M | 0.4% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 1,026,912 | $14M | 0.4% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 1,024,401 | $14M | 0.4% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 972,576 | $14M | 0.4% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 903,742 | $13M | 0.3% | 2026-Q2 |
| CITIGROUP INC added | 902,386 | $13M | 0.3% | 2026-Q2 |
| Legal & General Group Plc trimmed | 757,252 | $11M | 0.3% | 2026-Q2 |
| Swiss National Bank added | 706,100 | $10M | 0.3% | 2026-Q2 |
| Jump Financial, LLC added | 649,253 | $9M | 0.2% | 2026-Q2 |
| OCCUDO QUANTITATIVE STRATEGIES LP new | 634,376 | $9M | 0.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 619,821 | $9M | 0.2% | 2026-Q2 |
| Man Group plc added | 601,065 | $8M | 0.2% | 2026-Q2 |
| Walleye Capital LLC added | 580,935 | $8M | 0.2% | 2026-Q2 |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main trimmed | 524,275 | $7M | 0.2% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 513,891 | $4M | 0.1% | 2026-Q2 |
| Edgestream Partners, L.P. added | 496,906 | $7M | 0.2% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 482,968 | $7M | 0.2% | 2026-Q2 |
| Headlands Technologies LLC added | 444,756 | $6M | 0.2% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 443,344 | $6M | 0.2% | 2026-Q2 |
| COMPASS FINANCIAL MANAGEMENT LLC new | 431,971 | $6M | 0.2% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC added | 428,831 | $6M | 0.2% | 2026-Q2 |
| LPL Financial LLC trimmed | 410,702 | $6M | 0.2% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 405,306 | $6M | 0.1% | 2026-Q2 |
| Foundations Investment Advisors, LLC trimmed | 398,085 | $6M | 0.1% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC added | 395,705 | $5M | 0.1% | 2026-Q2 |
| NOMURA HOLDINGS INC trimmed | 350,281 | $5M | 0.1% | 2026-Q2 |
| BANCO BILBAO VIZCAYA ARGENTARIA, S.A. trimmed | 345,233 | $5M | 0.1% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 342,166 | $5M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 338,758 | $5M | 0.1% | 2026-Q2 |
| XTX Topco Ltd added | 314,736 | $4M | 0.1% | 2026-Q2 |
| IMC-Chicago, LLC trimmed | 286,832 | $4M | 0.1% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 271,198 | $4M | 0.1% | 2026-Q2 |
| Aptus Capital Advisors, LLC trimmed | 258,504 | $4M | 0.1% | 2026-Q2 |
| Second Line Capital, LLC trimmed | 258,225 | $4M | 0.1% | 2026-Q2 |
| WINTON GROUP Ltd added | 255,240 | $4M | 0.1% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 255,042 | $4M | 0.1% | 2026-Q2 |
| Generali Asset Management SPA SGR | 250,000 | $3M | 0.1% | 2026-Q2 |
| Quantinno Capital Management LP added | 249,207 | $3M | 0.1% | 2026-Q2 |
| MERCER GLOBAL ADVISORS INC /ADV added | 248,736 | $3M | 0.1% | 2026-Q2 |
| Creative Planning added | 243,097 | $3M | 0.1% | 2026-Q2 |
| Defiance ETFs, LLC added | 235,224 | $3M | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC added | 225,551 | $3M | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 216,801 | $3M | 0.1% | 2026-Q2 |
| Stratos Wealth Partners, LTD. added | 216,603 | $3M | 0.1% | 2026-Q2 |
| GREAT LAKES ADVISORS, LLC new | 207,265 | $3M | 0.1% | 2026-Q2 |
| Y-Intercept (Hong Kong) Ltd trimmed | 195,754 | $3M | 0.1% | 2026-Q2 |
| Cetera Investment Advisers added | 193,617 | $3M | 0.1% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC added | 189,508 | $3M | 0.1% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 187,917 | $3M | 0.1% | 2026-Q2 |
| COMMONWEALTH EQUITY SERVICES, LLC added | 182,582 | $3M | 0.1% | 2026-Q2 |
| MIZUHO MARKETS AMERICAS LLC trimmed | 178,363 | $2M | 0.1% | 2026-Q2 |
| Generali Investments CEE, investicni spolecnost, a.s. | 177,234 | $2M | 0.1% | 2026-Q2 |
| Quantbot Technologies LP trimmed | 164,041 | $2M | 0.1% | 2026-Q2 |
| Harvest Portfolios Group Inc. trimmed | 158,599 | $2M | 0.1% | 2026-Q2 |
| Jupiter Topco LLC new | 150,209 | $2M | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC trimmed | 147,039 | $2M | 0.1% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP added | 146,020 | $2M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.