Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
373 institutional managers reported holding MARA for the quarter ended Mar 31, 2026. Together they hold about 63% of shares outstanding; the top 10 hold 44%. 70 opened new positions; 91 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 59.78M | 15.72% | $487.2M | added +2.1% | 2015 Q2 |
| Vanguard Group | 45.85M | 12.06% | $373.7M | trimmed -1.9% | 2014 Q4 |
| State Street | 15.22M | 4.00% | $124.0M | added +3.1% | 2020 Q4 |
| Geode Capital | 10.32M | 2.71% | $84.1M | added +3.6% | 2014 Q4 |
| Marex Group plc | 8.31M | 2.19% | $67.8M | trimmed -18% | 2023 Q4 |
| UBS | 8.31M | 2.19% | $67.7M | trimmed -18.5% | 2016 Q4 |
| Goldman Sachs | 6.03M | 1.59% | $49.2M | added +61.3% | 2020 Q4 |
| Morgan Stanley | 5.22M | 1.37% | $42.5M | trimmed -17.7% | 2014 Q3 |
| Bank OF America CORP /DE/ | 5.09M | 1.34% | $41.5M | added +49.4% | 2020 Q3 |
| Charles Schwab Investment Management | 4.10M | 1.08% | $33.4M | trimmed -6.5% | 2020 Q4 |
| HRT Financial LP | 3.68M | 0.97% | $30.0M | opened | 2026 Q1 |
| VAN ECK Associates CORP | 3.48M | 0.92% | $28.4M | added +27.7% | 2021 Q2 |
| Northern Trust | 3.34M | 0.88% | $27.2M | added +7.1% | 2020 Q2 |
| Capital Research Global Investors | 3.32M | 0.87% | $27.0M | trimmed -10.3% | 2025 Q3 |
| BNY Mellon | 2.46M | 0.65% | $20.1M | trimmed -1.9% | 2020 Q4 |
| Clear Street Group INC. | 2.35M | 0.62% | $19.1M | added +82.2% | 2025 Q3 |
| Susquehanna International Group | 2.12M | 0.56% | $17.3M | added +396.1% | 2020 Q2 |
| Exchange Traded Concepts, LLC | 1.96M | 0.52% | $15.9M | added +27.1% | 2021 Q2 |
| Principal Financial Group INC | 1.84M | 0.48% | $15.0M | added +2% | 2021 Q2 |
| Mirae Asset Global Etfs Holdings LTD. | 1.79M | 0.47% | $14.6M | trimmed -6.3% | 2021 Q1 |
| Invesco | 1.61M | 0.42% | $13.1M | added +6% | 2021 Q1 |
| Wells Fargo & COMPANY/MN | 1.58M | 0.42% | $12.9M | trimmed -10.4% | 2020 Q1 |
| Vident Advisory, LLC | 1.54M | 0.41% | $12.6M | trimmed -8.8% | 2021 Q1 |
| Nomura Asset Management International INC. | 1.37M | 0.36% | $11.2M | trimmed -14.6% | 2025 Q1 |
| Public Sector Pension Investment Board | 1.35M | 0.36% | $11.0M | added +3.4% | 2024 Q2 |
| D. E. Shaw | 1.32M | 0.35% | $10.7M | trimmed -12.4% | 2025 Q3 |
| Barclays PLC | 1.28M | 0.34% | $10.4M | trimmed -25.9% | 2022 Q1 |
| Tidal Investments LLC | 1.14M | 0.30% | $9.3M | added +12.1% | 2020 Q4 |
| IMC-Chicago, LLC | 1.11M | 0.29% | $9.0M | added +45% | 2023 Q1 |
| Rhumbline Advisers | 1.10M | 0.29% | $9.0M | added +1.4% | 2021 Q2 |
| LPL Financial LLC | 994.5k | 0.26% | $8.1M | added +1.2% | 2020 Q4 |
| First Trust Advisors LP | 974.2k | 0.26% | $7.9M | trimmed -30.7% | 2021 Q2 |
| Citadel Advisors | 964.6k | 0.25% | $7.9M | trimmed -30.7% | 2017 Q2 |
| Nuveen | 955.0k | 0.25% | $7.8M | added +8.4% | 2021 Q2 |
| Marshall Wace | 873.1k | 0.23% | $7.1M | opened | 2026 Q1 |
| Ameriprise Financial INC | 821.3k | 0.22% | $6.7M | added +9.2% | 2021 Q2 |
| Legal & General Group PLC | 815.0k | 0.21% | $6.6M | trimmed -10.1% | 2021 Q2 |
| Citigroup INC | 793.0k | 0.21% | $6.5M | added +29.7% | 2020 Q4 |
| Marathon Trading Investment Management LLC | 729.9k | 0.19% | $5.9M | added +236.5% | 2023 Q1 |
| Swiss National Bank | 693.9k | 0.18% | $5.7M | unchanged | 2021 Q2 |
| Banco Bilbao Vizcaya Argentaria, S.a. | 664.8k | 0.17% | $5.4M | added +128.1% | 2024 Q2 |
| Hsbc Holdings PLC | 634.2k | 0.17% | $5.2M | added +11.5% | 2025 Q4 |
| Delta Global Management LP | 620.6k | 0.16% | $5.1M | opened | 2026 Q1 |
| Millennium Management | 620.6k | 0.16% | $5.1M | trimmed -28.3% | 2020 Q3 |
| SG Americas Securities, LLC | 614.0k | 0.16% | $5.0M | trimmed -56.7% | 2020 Q4 |
| DZ Bank AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 585.1k | 0.15% | $4.8M | trimmed -5.4% | 2024 Q1 |
| Walleye Capital LLC | 555.6k | 0.15% | $4.5M | added +26167.5% | 2021 Q1 |
| Compass Rose Asset Management, LP (focused) | 520.0k | 0.14% | $4.2M | opened | 2026 Q1 |
| Voya Investment Management LLC | 507.4k | 0.13% | $4.1M | trimmed -22.4% | 2021 Q2 |
| AllianceBernstein | 456.2k | 0.12% | $3.7M | trimmed -0.9% | 2021 Q1 |
Largest 50 of 373 shown; the full ranked, searchable register is at boothcheck.com/holders/MARA. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.