Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
133 institutional managers reported holding OPRA for the quarter ended Mar 31, 2026. Together they hold about 15% of shares outstanding; the top 10 hold 10%. 25 opened new positions; 30 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Tidal Investments LLC | 2.46M | 2.75% | $35.1M | trimmed -5.8% | 2023 Q3 |
| American Century Companies INC | 1.76M | 1.97% | $25.1M | added +14.2% | 2025 Q3 |
| Schonfeld Strategic Advisors | 1.43M | 1.60% | $20.4M | added +26.7% | 2025 Q4 |
| Arrowstreet Capital | 770.0k | 0.86% | $11.0M | trimmed -5.8% | 2023 Q1 |
| Penn Capital Management Company, LLC | 544.6k | 0.61% | $7.8M | added +2.3% | 2025 Q3 |
| Susquehanna International Group | 484.6k | 0.54% | $6.9M | trimmed -6.4% | 2023 Q2 |
| ExodusPoint | 438.0k | 0.49% | $6.2M | opened | 2026 Q1 |
| NEW York State Common Retirement Fund | 353.9k | 0.40% | $5.0M | unchanged | 2025 Q3 |
| Trexquant Investment LP | 294.8k | 0.33% | $4.2M | added +34.3% | 2025 Q2 |
| UBS | 291.9k | 0.33% | $4.2M | added +251.7% | 2018 Q3 |
| Renaissance Technologies | 284.8k | 0.32% | $4.1M | added +22.9% | 2025 Q1 |
| Credit Agricole S A | 280.4k | 0.31% | $4.0M | trimmed -24.7% | 2024 Q2 |
| Rockefeller Capital Management L.p. | 252.1k | 0.28% | $3.6M | added +2.4% | 2024 Q2 |
| Charles Schwab Investment Management | 246.4k | 0.28% | $3.5M | trimmed -3.1% | 2023 Q3 |
| Millennium Management | 225.2k | 0.25% | $3.2M | added +14.6% | 2019 Q3 |
| Citadel Advisors | 225.2k | 0.25% | $3.2M | trimmed -7.8% | 2022 Q3 |
| Quinn Opportunity Partners LLC | 220.0k | 0.25% | $3.1M | opened | 2026 Q1 |
| Squarepoint Ops LLC | 163.7k | 0.18% | $2.3M | added +126.6% | 2025 Q1 |
| Seizert Capital Partners, LLC | 154.6k | 0.17% | $2.2M | opened | 2026 Q1 |
| Klein Pavlis & Peasley Financial, INC. | 146.9k | 0.16% | $2.1M | added +46.3% | 2024 Q4 |
| Marshall Wace | 122.9k | 0.14% | $1.8M | trimmed -52.8% | 2020 Q4 |
| Hennion & Walsh Asset Management, INC. | 99.4k | 0.11% | $1.4M | added +15.3% | 2023 Q2 |
| Strategic Global Advisors, LLC | 98.3k | 0.11% | $1.4M | trimmed -4.4% | 2025 Q3 |
| Janney Montgomery Scott LLC | 90.8k | 0.10% | $1.3M | unchanged | 2025 Q3 |
| Voloridge Investment Management | 89.0k | 0.10% | $1.3M | trimmed -70.5% | 2023 Q3 |
| BlackRock | 88.3k | 0.10% | $1.3M | added +35.5% | 2020 Q3 |
| SEI Investments CO | 84.6k | 0.09% | $1.2M | added +74.5% | 2024 Q4 |
| Samalin Investment Counsel, LLC | 80.5k | 0.09% | $1.1M | added +3.2% | 2024 Q3 |
| Morgan Stanley | 77.5k | 0.09% | $1.1M | trimmed -68% | 2018 Q3 |
| Brooklyn Investment Group | 72.5k | 0.08% | $1.0M | opened | 2026 Q1 |
| Jane Street | 71.9k | 0.08% | $1.0M | opened | 2023 Q2 |
| Peak6 LLC | 70.6k | 0.08% | $1.0M | added +1454.6% | 2025 Q4 |
| Wells Fargo & COMPANY/MN | 69.6k | 0.08% | $992k | added +145.3% | 2023 Q2 |
| Private Advisor Group, LLC | 67.8k | 0.08% | $967k | opened | 2026 Q1 |
| Point Nemo Capital, LLC | 64.3k | 0.07% | $917k | added +35.8% | 2025 Q4 |
| LPL Financial LLC | 64.1k | 0.07% | $914k | added +110.4% | 2023 Q2 |
| Russell Investments Group, LTD. | 62.9k | 0.07% | $897k | added +4.8% | 2024 Q4 |
| Mlp3, LLC | 60.8k | 0.07% | $866k | added +98% | 2025 Q4 |
| &partners | 56.5k | 0.06% | $806k | added +3.4% | 2025 Q3 |
| Harvey Capital Management INC | 55.8k | 0.06% | $795k | trimmed -44.7% | 2024 Q3 |
| Ingalls & Snyder LLC | 53.6k | 0.06% | $765k | trimmed -3.2% | 2025 Q1 |
| Raymond James Financial INC | 45.1k | 0.05% | $642k | trimmed -40.5% | 2021 Q1 |
| Lind Value II ApS (focused) | 43.5k | 0.05% | $620k | opened | 2026 Q1 |
| CDC Financial, INC. (focused) | 41.0k | 0.05% | $584k | opened | 2026 Q1 |
| Baader Bank Aktiengesellschaft | 40.9k | 0.05% | $583k | trimmed -81.5% | 2025 Q3 |
| Cetera Investment Advisers | 39.1k | 0.04% | $557k | added +114.5% | 2024 Q2 |
| VAN ECK Associates CORP | 34.2k | 0.04% | $487k | added +5.5% | 2025 Q2 |
| IMC-Chicago, LLC | 33.2k | 0.04% | $473k | opened | 2026 Q1 |
| Group ONE Trading LLC | 32.7k | 0.04% | $466k | trimmed -38.1% | 2025 Q2 |
| Worth Venture Partners, LLC | 31.4k | 0.04% | $448k | trimmed -30.6% | 2023 Q1 |
Largest 50 of 133 shown; the full ranked, searchable register is at boothcheck.com/holders/OPRA. 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.