Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
535 institutional managers reported holding BMRN for the quarter ended Mar 31, 2026. Together they hold about 93% of shares outstanding; the top 10 hold 51%. 81 opened new positions; 74 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 19.82M | 10.03% | $1.12B | added +3.6% | ≤2013 |
| Vanguard Group | 18.47M | 9.34% | $1.04B | added +1.8% | ≤2013 |
| Dodge & Cox | 14.56M | 7.37% | $822.4M | unchanged | 2019 Q4 |
| PRIMECAP Management | 14.19M | 7.18% | $801.7M | trimmed -2.4% | ≤2013 |
| AQR Capital | 7.68M | 3.88% | $433.6M | added +14.8% | 2018 Q3 |
| State Street | 7.30M | 3.69% | $412.0M | trimmed -3% | ≤2013 |
| Viking Global | 7.06M | 3.57% | $398.9M | added +17% | 2021 Q4 |
| Citadel Advisors | 4.51M | 2.28% | $254.9M | added +230.7% | ≤2013 |
| Geode Capital | 3.82M | 1.93% | $215.7M | added +4% | ≤2013 |
| Dimensional Fund Advisors | 3.80M | 1.92% | $214.8M | added +14.5% | ≤2013 |
| Vestal Point Capital, LP | 3.58M | 1.81% | $201.9M | added +19.2% | 2024 Q1 |
| FMR (Fidelity) | 3.57M | 1.80% | $201.5M | added +94.2% | ≤2013 |
| Capital Research Global Investors | 3.49M | 1.77% | $197.2M | added +37.1% | ≤2013 |
| Millennium Management | 3.01M | 1.52% | $170.0M | trimmed -0.9% | ≤2013 |
| UBS | 2.35M | 1.19% | $132.6M | trimmed -17.6% | ≤2013 |
| Assenagon Asset Management S.a. | 1.92M | 0.97% | $108.5M | added +35.3% | 2021 Q3 |
| First Trust Advisors LP | 1.67M | 0.85% | $94.5M | added +43.3% | ≤2013 |
| Charles Schwab Investment Management | 1.59M | 0.80% | $89.7M | added +11.5% | ≤2013 |
| Northern Trust | 1.59M | 0.80% | $89.6M | added +2.5% | ≤2013 |
| Balyasny Asset Management | 1.36M | 0.69% | $77.0M | opened | 2022 Q1 |
| Morgan Stanley | 1.32M | 0.67% | $74.6M | trimmed -42.9% | ≤2013 |
| Jones Hill Capital LP (focused) | 1.27M | 0.64% | $71.6M | opened | 2026 Q1 |
| DNB Asset Management AS | 1.22M | 0.62% | $69.0M | trimmed -10.2% | 2016 Q1 |
| Point72 | 1.20M | 0.61% | $67.7M | added +173.3% | 2025 Q4 |
| Pictet Asset Management Holding SA | 1.19M | 0.60% | $67.4M | trimmed -7% | ≤2013 |
| Ameriprise Financial INC | 1.17M | 0.59% | $66.3M | trimmed -19.9% | ≤2013 |
| Deep Track Capital, LP | 1.15M | 0.58% | $65.0M | trimmed -50% | 2025 Q3 |
| BNY Mellon | 1.14M | 0.58% | $64.7M | trimmed -6.9% | ≤2013 |
| Renaissance Technologies | 1.02M | 0.52% | $57.9M | trimmed -22.6% | 2021 Q1 |
| BNP Paribas Financial Markets | 1.02M | 0.52% | $57.8M | added +6% | ≤2013 |
| Hudson Bay Capital | 974.8k | 0.49% | $55.1M | added +45.5% | 2015 Q1 |
| Caisse de depot et placement du Quebec | 945.6k | 0.48% | $53.4M | trimmed -9.8% | 2025 Q1 |
| Bank OF America CORP /DE/ | 937.0k | 0.47% | $52.9M | added +8.4% | ≤2013 |
| Franklin Resources | 933.9k | 0.47% | $52.7M | added +882% | ≤2013 |
| River Road Asset Management, LLC | 917.6k | 0.46% | $51.8M | added +1.2% | 2025 Q4 |
| LSV Asset Management | 884.8k | 0.45% | $50.0M | unchanged | 2025 Q2 |
| Janus Henderson | 857.0k | 0.43% | $48.4M | added +210.1% | ≤2013 |
| Deerfield Management Company, L.p. | 851.6k | 0.43% | $48.1M | opened | 2026 Q1 |
| Swedbank Robur | 792.2k | 0.40% | $44.7M | trimmed -0.6% | 2021 Q1 |
| Sofinnova Investments, INC. | 782.0k | 0.40% | $44.2M | added +12.2% | 2025 Q4 |
| Wellington Management | 716.5k | 0.36% | $40.5M | trimmed -8.7% | 2025 Q4 |
| Fort Washington Investment Advisors INC /OH/ | 714.5k | 0.36% | $40.4M | unchanged | 2021 Q3 |
| Loomis Sayles & CO L P | 713.8k | 0.36% | $40.3M | unchanged | 2024 Q2 |
| Nuveen | 705.2k | 0.36% | $39.8M | added +3.8% | 2019 Q2 |
| Qube Research & Technologies LTD | 689.7k | 0.35% | $39.0M | trimmed -52% | 2020 Q2 |
| Edmond DE Rothschild Holding S.a. | 686.0k | 0.35% | $38.7M | added +3.2% | 2021 Q1 |
| Palo Alto Investors LP | 685.2k | 0.35% | $38.7M | trimmed -8.2% | ≤2013 |
| Novo Holdings A/S (focused) | 660.0k | 0.33% | $37.3M | unchanged | 2022 Q2 |
| Soleus Capital Management, L.p. | 650.6k | 0.33% | $36.7M | trimmed -50.7% | 2024 Q4 |
| Thrivent Financial for Lutherans | 627.7k | 0.32% | $35.5M | trimmed -21% | 2024 Q2 |
Largest 50 of 535 shown; the full ranked, searchable register is at boothcheck.com/holders/BMRN. 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.