Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
326 institutional managers reported holding SRPT for the quarter ended Mar 31, 2026. Together they hold about 84% of shares outstanding; the top 10 hold 50%. 41 opened new positions; 56 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 14.76M | 12.10% | $320.8M | added +3.3% | ≤2013 |
| Vanguard Group | 12.12M | 9.94% | $263.5M | added +2.6% | ≤2013 |
| State Street | 6.61M | 5.42% | $143.8M | unchanged | ≤2013 |
| AQR Capital | 6.43M | 5.28% | $139.9M | trimmed -17.5% | 2024 Q4 |
| Two Sigma | 4.59M | 3.77% | $99.9M | added +88.1% | 2021 Q1 |
| First Trust Advisors LP | 4.14M | 3.39% | $89.9M | added +107.6% | 2016 Q4 |
| RA Capital Management, L.p. | 3.90M | 3.20% | $84.8M | opened | 2026 Q1 |
| Erste Asset Management GmbH | 2.97M | 2.44% | $64.5M | added +8.8% | 2018 Q4 |
| Morgan Stanley | 2.60M | 2.13% | $56.5M | added +35.8% | ≤2013 |
| UBS | 2.51M | 2.06% | $54.6M | added +7.9% | ≤2013 |
| Aberdeen Group plc | 2.32M | 1.90% | $50.4M | added +3% | 2023 Q4 |
| Bank OF America CORP /DE/ | 2.15M | 1.76% | $46.7M | added +26.6% | ≤2013 |
| Geode Capital | 1.99M | 1.63% | $43.2M | added +4.4% | ≤2013 |
| Federated Hermes, INC. | 1.79M | 1.47% | $38.8M | added +36% | 2019 Q4 |
| Renaissance Technologies | 1.67M | 1.37% | $36.2M | added +43.6% | 2025 Q2 |
| CPP Investment Board | 1.24M | 1.02% | $27.0M | added +258.3% | 2025 Q2 |
| Millennium Management | 1.22M | 1.00% | $26.6M | added +22.2% | ≤2013 |
| Citigroup INC | 1.15M | 0.94% | $24.9M | unchanged | ≤2013 |
| T. Rowe Price Investment Management, INC. | 1.13M | 0.93% | $24.6M | added +206.4% | 2023 Q3 |
| Goldman Sachs | 1.08M | 0.88% | $23.4M | added +91.4% | ≤2013 |
| Connor, Clark & Lunn Investment Management LTD. | 1.02M | 0.84% | $22.2M | trimmed -5.8% | 2022 Q2 |
| Susquehanna International Group | 897.5k | 0.74% | $19.5M | added +109.9% | ≤2013 |
| Legal & General Group PLC | 866.7k | 0.71% | $18.8M | added +227.7% | 2014 Q3 |
| Voleon Capital Management LP | 800.7k | 0.66% | $17.4M | trimmed -9% | 2025 Q2 |
| Charles Schwab Investment Management | 791.1k | 0.65% | $17.2M | added +3.4% | ≤2013 |
| 683 Capital Management, LLC | 750.0k | 0.61% | $16.3M | trimmed -7.4% | 2023 Q2 |
| Marshall Wace | 725.1k | 0.59% | $15.8M | added +405.3% | 2022 Q4 |
| Northern Trust | 724.3k | 0.59% | $15.7M | trimmed -1.3% | ≤2013 |
| BNP Paribas Financial Markets | 701.6k | 0.57% | $15.3M | trimmed -3.8% | 2014 Q3 |
| BNY Mellon | 687.6k | 0.56% | $14.9M | trimmed -0.5% | ≤2013 |
| Citadel Advisors | 652.2k | 0.54% | $14.2M | added +449.3% | 2014 Q2 |
| Hotchkis & Wiley Capital Management LLC | 560.1k | 0.46% | $12.2M | opened | 2026 Q1 |
| SG Americas Securities, LLC | 559.1k | 0.46% | $12.2M | added +192.1% | 2024 Q1 |
| Principal Financial Group INC | 509.6k | 0.42% | $11.1M | added +2.5% | 2016 Q3 |
| Jump Financial | 507.8k | 0.42% | $11.0M | added +200.7% | 2021 Q4 |
| C WorldWide Group Holding A/S | 490.3k | 0.40% | $10.7M | unchanged | 2016 Q4 |
| D. E. Shaw | 475.0k | 0.39% | $10.3M | trimmed -69.2% | 2019 Q2 |
| Capital Fund Management S.a. | 459.3k | 0.38% | $10.0M | trimmed -5.4% | 2023 Q4 |
| Voloridge Investment Management | 432.5k | 0.35% | $9.4M | trimmed -50.8% | 2021 Q1 |
| Invesco | 410.3k | 0.34% | $8.9M | added +3.3% | 2015 Q1 |
| Balyasny Asset Management | 392.0k | 0.32% | $8.5M | added +327.9% | 2020 Q4 |
| Public Sector Pension Investment Board | 374.9k | 0.31% | $8.1M | added +3.4% | 2025 Q3 |
| Jacobs Levy Equity Management, INC | 372.6k | 0.31% | $8.1M | trimmed -32.7% | 2025 Q2 |
| IEQ Capital, LLC | 370.5k | 0.30% | $8.1M | trimmed -22% | 2025 Q3 |
| Healthcare OF Ontario Pension Plan Trust Fund | 365.3k | 0.30% | $7.9M | trimmed -23.8% | 2025 Q4 |
| Clear Street Group INC. | 361.4k | 0.30% | $7.9M | trimmed -16.5% | 2025 Q4 |
| Dimensional Fund Advisors | 336.7k | 0.28% | $7.3M | trimmed -26.5% | 2018 Q1 |
| Trexquant Investment LP | 323.9k | 0.27% | $7.0M | added +81.6% | 2025 Q1 |
| Walleye Capital LLC | 291.8k | 0.24% | $6.3M | added +1.3% | 2021 Q1 |
| Adar1 Capital Management, LLC | 262.1k | 0.21% | $5.7M | added +807.8% | 2023 Q4 |
Largest 50 of 326 shown; the full ranked, searchable register is at boothcheck.com/holders/SRPT. 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.