Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
317 institutional managers reported holding OSCR for the quarter ended Mar 31, 2026. Together they hold about 53% of shares outstanding; the top 10 hold 28%. 53 opened new positions; 72 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 23.19M | 7.03% | $265.9M | added +12% | 2021 Q1 |
| BlackRock | 17.31M | 5.25% | $198.5M | unchanged | 2021 Q2 |
| T. Rowe Price Investment Management, INC. | 11.64M | 3.53% | $133.6M | added +303.7% | 2024 Q1 |
| American Century Companies INC | 7.03M | 2.13% | $80.6M | added +11.6% | 2022 Q3 |
| Thrive Capital Management, LLC | 6.34M | 1.92% | $72.8M | unchanged | 2021 Q1 |
| BIT Capital GmbH | 6.32M | 1.92% | $72.5M | added +2.2% | 2024 Q1 |
| D. E. Shaw | 5.49M | 1.66% | $62.9M | trimmed -9.9% | 2022 Q1 |
| State Street | 5.26M | 1.60% | $60.4M | added +1.5% | 2021 Q2 |
| Geode Capital | 5.03M | 1.53% | $57.7M | added +4.9% | 2021 Q2 |
| Dimensional Fund Advisors | 4.19M | 1.27% | $48.1M | added +22.1% | 2022 Q2 |
| Citadel Advisors | 3.47M | 1.05% | $39.8M | added +34.5% | 2021 Q2 |
| Morgan Stanley | 3.35M | 1.02% | $38.5M | trimmed -50.8% | 2021 Q1 |
| Point72 | 3.11M | 0.94% | $35.7M | added +8.9% | 2025 Q3 |
| Jane Street | 2.90M | 0.88% | $33.3M | trimmed -49.8% | 2021 Q1 |
| Bank OF America CORP /DE/ | 2.86M | 0.87% | $32.8M | added +205.1% | 2021 Q1 |
| Susquehanna International Group | 2.75M | 0.83% | $31.5M | added +139.4% | 2021 Q1 |
| Glynn Capital Management LLC (focused) | 2.59M | 0.79% | $29.7M | trimmed -5.4% | 2021 Q3 |
| Jacobs Levy Equity Management, INC | 2.47M | 0.75% | $28.4M | added +133.3% | 2022 Q2 |
| Two Sigma | 2.35M | 0.71% | $26.9M | trimmed -44.1% | 2021 Q4 |
| BNP Paribas Financial Markets | 2.00M | 0.61% | $22.9M | added +173% | 2024 Q4 |
| UBS | 1.98M | 0.60% | $22.7M | added +21.2% | 2021 Q2 |
| T. Rowe Price | 1.91M | 0.58% | $22.0M | trimmed -30.7% | 2021 Q1 |
| Charles Schwab Investment Management | 1.90M | 0.58% | $21.8M | added +8.1% | 2021 Q2 |
| Northern Trust | 1.88M | 0.57% | $21.5M | added +3.9% | 2021 Q2 |
| Tudor Investment | 1.72M | 0.52% | $19.7M | added +6.7% | 2021 Q1 |
| Freestone Grove Partners LP | 1.60M | 0.49% | $18.4M | added +214.9% | 2025 Q4 |
| Goldman Sachs | 1.47M | 0.45% | $16.9M | trimmed -29.5% | 2021 Q1 |
| State OF Michigan Retirement System | 1.45M | 0.44% | $16.6M | unchanged | 2025 Q3 |
| Jupiter Asset Management LTD | 1.33M | 0.41% | $15.3M | opened | 2026 Q1 |
| Nuveen | 1.32M | 0.40% | $15.2M | added +11.7% | 2022 Q2 |
| Group ONE Trading LLC | 1.26M | 0.38% | $14.4M | added +86.7% | 2024 Q4 |
| Assenagon Asset Management S.a. | 1.23M | 0.37% | $14.1M | added +91.6% | 2022 Q4 |
| FMR (Fidelity) | 1.20M | 0.36% | $13.7M | trimmed -37.9% | 2021 Q1 |
| Gilder Gagnon Howe & CO LLC | 1.07M | 0.33% | $12.3M | trimmed -3.1% | 2021 Q4 |
| Trexquant Investment LP | 1.02M | 0.31% | $11.7M | added +244% | 2023 Q2 |
| Walleye Capital LLC | 1.01M | 0.31% | $11.6M | trimmed -11.7% | 2023 Q2 |
| Marshall Wace | 922.6k | 0.28% | $10.6M | trimmed -10.9% | 2023 Q4 |
| IMC-Chicago, LLC | 850.4k | 0.26% | $9.8M | added +128.9% | 2024 Q1 |
| SG Americas Securities, LLC | 801.0k | 0.24% | $9.2M | trimmed -13.1% | 2025 Q2 |
| RPG Investment Advisory, LLC | 799.7k | 0.24% | $9.2M | added +0.7% | 2025 Q3 |
| Defiance ETFs, LLC | 769.2k | 0.23% | $8.8M | opened | 2026 Q1 |
| CPP Investment Board | 754.7k | 0.23% | $8.7M | added +454.5% | 2024 Q1 |
| Engineers Gate Manager LP | 739.8k | 0.22% | $8.5M | added +113.2% | 2022 Q1 |
| Fiduciary Alliance LLC | 714.4k | 0.22% | $8.2M | added +9.8% | 2025 Q1 |
| Rhenman & Partners Asset Management AB | 660.0k | 0.20% | $7.6M | added +153.8% | 2023 Q3 |
| Simplex Trading, LLC | 565.2k | 0.17% | $6.5M | trimmed -11.6% | 2025 Q2 |
| BNY Mellon | 556.1k | 0.17% | $6.4M | added +1.2% | 2021 Q2 |
| Empowered Funds, LLC | 543.5k | 0.17% | $6.2M | opened | 2025 Q2 |
| Victory Capital Management INC | 526.7k | 0.16% | $6.0M | added +2072.1% | 2022 Q3 |
| Wells Fargo & COMPANY/MN | 525.6k | 0.16% | $6.0M | trimmed -15.8% | 2021 Q1 |
Largest 50 of 317 shown; the full ranked, searchable register is at boothcheck.com/holders/OSCR. 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.