| 4 | STATE STREET CORP | 9.2M | $480.0M | -3.2% | 5.460% | 0.01% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 7.5M | $393.7M | +1.2% | 4.479% | 0.01% |
| 6 | RENAISSANCE TECHNOLOGIES LLC | 6.5M | $338.5M | +4.9% | 3.851% | 0.47% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 4.5M | $234.7M | +7.1% | 2.669% | 0.01% |
| 8 | DIMENSIONAL FUND ADVISORS LP | 4.2M | $219.8M | -7.2% | 2.500% | 0.04% |
| 9 | Deep Track Capital, LP | 4.0M | $209.6M | +11.4% | 2.384% | 3.05% |
| 10 | AMERICAN CENTURY COMPANIES INC | 4.0M | $207.2M | -34.9% | 2.357% | 0.09% |
| 11 | Holocene Advisors, LP | 4.0M | $207.0M | +70.5% | 2.355% | 0.47% |
| 12 | Commodore Capital LP | 3.0M | $157.2M | -28.6% | 1.788% | 9.36% |
| 13 | WELLINGTON MANAGEMENT GROUP LLP | 2.8M | $147.5M | -5.2% | 1.678% | 0.03% |
| 14 | PRIMECAP MANAGEMENT CO/CA/ | 2.5M | $132.5M | -0.4% | 1.507% | 0.08% |
| 15 | FIRST TRUST ADVISORS LP | 2.4M | $126.8M | -18.4% | 1.443% | 0.07% |
| 16 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 2.3M | $122.3M | +4.4% | 1.392% | 0.02% |
| 17 | Nuveen, LLC | 2.3M | $121.8M | -5.5% | 1.385% | 0.03% |
| 18 | NORGES BANK | 2.2M | $113.0M | — | 1.286% | 0.01% |
| 19 | BVF INC/IL | 2.2M | $112.9M | +7.7% | 1.284% | 2.89% |
| 20 | GOLDMAN SACHS GROUP INC | 2.0M | $106.0M | +7.5% | 1.206% | 0.01% |
| 21 | Bain Capital Life Sciences Investors, LLC | 1.9M | $101.5M | +217.7% | 1.155% | 6.04% |
| 22 | CITADEL ADVISORS LLC | 1.9M | $99.1M | -18.9% | 1.128% | 0.01% |
| 23 | NORTHERN TRUST CORP | 1.8M | $96.0M | +7.9% | 1.092% | 0.01% |
| 24 | MORGAN STANLEY | 1.8M | $91.8M | +0.9% | 1.044% | 0.00% |
| 25 | RTW INVESTMENTS, LP | 1.7M | $87.6M | 0.0% | 0.997% | 0.75% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ALKS — a direct measure of their conviction.
Institutions that fully closed their ALKS position in Q2 2026
| 102.17% |
| 0.80 pp |
| $4.97B |
| +17% |
| Q4 2024 | 337 | +1.8% | 102.97% | 6.02 pp | $4.26B | 3.9% |
| Q3 2024 | 331 | — | 108.99% | — | $4.43B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
85 institutions opened new positions in ALKS during Q2 2026, while 48 fully exited. 278 added to existing positions and 48 trimmed.
ALKS institutional ownership rose by 1.24 percentage points quarter-over-quarter, with a net change of +40 holders.
The top 10 institutions account for 52.0% of all reported 13F value in ALKS, and the top 25 account for 72.5%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Alkermes plc (ALKS) Institutional Ownership