Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
388 institutional managers reported holding RIOT for the quarter ended Mar 31, 2026. Together they hold about 84% of shares outstanding; the top 10 hold 46%. 80 opened new positions; 75 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 39.24M | 11.29% | $485.0M | trimmed -1.8% | 2017 Q4 |
| BlackRock | 29.65M | 8.53% | $366.5M | added +1.9% | 2017 Q4 |
| Starboard Value (focused) | 15.54M | 4.47% | $192.1M | added +22% | 2024 Q4 |
| FMR (Fidelity) | 15.01M | 4.32% | $185.6M | added +17.3% | 2020 Q3 |
| Situational Awareness Partners LP (focused) | 11.50M | 3.31% | $142.2M | opened | 2026 Q1 |
| Situational Awareness LP (focused) | 11.50M | 3.31% | $142.2M | added +86.5% | 2025 Q3 |
| Nomura Asset Management International INC. | 10.48M | 3.02% | $129.6M | added +82.2% | 2023 Q2 |
| State Street | 9.19M | 2.64% | $113.6M | added +3.2% | 2020 Q4 |
| Geode Capital | 8.96M | 2.58% | $110.8M | added +1.5% | 2017 Q4 |
| Jane Street | 7.39M | 2.13% | $91.3M | added +48.7% | 2020 Q2 |
| Dimensional Fund Advisors | 7.02M | 2.02% | $86.7M | added +36.4% | 2022 Q4 |
| D. E. Shaw | 5.46M | 1.57% | $67.4M | unchanged | 2024 Q4 |
| Value Aligned Research Advisors, LLC | 5.18M | 1.49% | $64.0M | trimmed -46.2% | 2024 Q4 |
| Mizuho Markets Americas LLC | 5.06M | 1.46% | $62.5M | added +19% | 2024 Q4 |
| Bank OF America CORP /DE/ | 4.04M | 1.16% | $49.9M | added +368% | 2017 Q4 |
| T. Rowe Price Investment Management, INC. | 3.84M | 1.10% | $47.4M | added +140% | 2025 Q3 |
| Goldman Sachs | 3.81M | 1.10% | $47.1M | trimmed -21.7% | 2020 Q3 |
| Azora Capital LP (focused) | 3.73M | 1.07% | $46.1M | added +1328.9% | 2024 Q4 |
| Westfield Capital Management CO LP | 3.50M | 1.01% | $43.3M | opened | 2025 Q1 |
| Charles Schwab Investment Management | 3.19M | 0.92% | $39.4M | trimmed -4.9% | 2020 Q2 |
| Morgan Stanley | 3.04M | 0.87% | $37.5M | trimmed -25.1% | 2017 Q4 |
| Northern Trust | 3.03M | 0.87% | $37.4M | added +8.6% | 2018 Q1 |
| Principal Financial Group INC | 2.96M | 0.85% | $36.6M | added +55% | 2021 Q2 |
| Citadel Advisors | 2.91M | 0.84% | $36.0M | added +79.8% | 2017 Q4 |
| UBS | 2.90M | 0.83% | $35.8M | trimmed -19.7% | 2017 Q4 |
| Ameriprise Financial INC | 2.79M | 0.80% | $34.5M | added +2782.9% | 2021 Q1 |
| VAN ECK Associates CORP | 2.74M | 0.79% | $33.9M | trimmed -11.3% | 2021 Q2 |
| MFS Investment Management | 2.72M | 0.78% | $33.7M | added +19.3% | 2025 Q3 |
| Invesco | 2.71M | 0.78% | $33.5M | trimmed -2.7% | 2021 Q1 |
| Defiance ETFs, LLC | 2.71M | 0.78% | $33.4M | opened | 2026 Q1 |
| Connor, Clark & Lunn Investment Management LTD. | 2.64M | 0.76% | $32.6M | added +71% | 2025 Q3 |
| Tidal Investments LLC | 2.39M | 0.69% | $29.6M | added +17.7% | 2020 Q4 |
| American Century Companies INC | 2.15M | 0.62% | $26.6M | added +63% | 2022 Q3 |
| Moore Capital | 2.01M | 0.58% | $24.8M | opened | 2025 Q3 |
| Cibc Bancorp USA INC. | 1.87M | 0.54% | $23.1M | trimmed -26% | 2024 Q1 |
| Mark Asset Management LP (focused) | 1.74M | 0.50% | $21.5M | added +21.4% | 2025 Q2 |
| Wellington Management | 1.62M | 0.47% | $20.0M | added +19.3% | 2021 Q2 |
| Senator Investment Group LP | 1.50M | 0.43% | $18.5M | opened | 2026 Q1 |
| Mirae Asset Global Etfs Holdings LTD. | 1.47M | 0.42% | $18.2M | trimmed -17.4% | 2020 Q3 |
| Broad Peak Investment Advisers Pte LTD (focused) | 1.45M | 0.42% | $17.9M | added +2.8% | 2025 Q4 |
| Millennium Management | 1.24M | 0.36% | $15.3M | added +101.8% | 2022 Q1 |
| BNY Mellon | 1.15M | 0.33% | $14.2M | trimmed -8.7% | 2020 Q4 |
| Exchange Traded Concepts, LLC | 1.11M | 0.32% | $13.7M | trimmed -8.7% | 2021 Q2 |
| MetLife Investment Management, LLC | 957.3k | 0.28% | $11.8M | added +20.2% | 2021 Q2 |
| Vident Advisory, LLC | 918.8k | 0.26% | $11.4M | trimmed -24.4% | 2020 Q3 |
| Nuveen | 892.7k | 0.26% | $11.0M | trimmed -32.6% | 2021 Q2 |
| Clearfield Capital Management LP (focused) | 879.2k | 0.25% | $10.9M | added +118.5% | 2025 Q4 |
| Galaxy Digital Capital Management GP LLC | 853.5k | 0.25% | $10.5M | trimmed -31.1% | 2024 Q4 |
| BIT Capital GmbH | 813.8k | 0.23% | $10.1M | trimmed -2.8% | 2021 Q3 |
| Healthcare OF Ontario Pension Plan Trust Fund | 806.0k | 0.23% | $10.0M | opened | 2025 Q1 |
Largest 50 of 388 shown; the full ranked, searchable register is at boothcheck.com/holders/RIOT. 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.