Biogen Inc. · NASDAQ:BIIB
Biogen Inc. shareholders
As of Jun 30, 2026, 1,017 institutions reported holding Biogen Inc., 96.3% of its shares. Largest: Fidelity, Vanguard and BlackRock. New holders, exits, insiders and big stakes, each with its filing.
| Holder | Shares | % of Biogen Inc. | Change | Filed |
|---|---|---|---|---|
| Fidelity | 18.2M | 12.3% | +5.41M | Aug 13, 2026 |
| Vanguard | 17.8M | 12.1% | +219K | Aug 13, 2026 |
| BlackRock | 16M | 10.8% | +11,135 | Aug 7, 2026 |
| Primecap Management Co | 15.2M | 10.3% | +397K | Aug 14, 2026 |
| State Street | 7.34M | 5.0% | +176K | Aug 7, 2026 |
| Geode Capital | 4.45M | 3.0% | +107K | Aug 12, 2026 |
| Wellington | 3.12M | 2.1% | +156K | Aug 14, 2026 |
| Norges Bank | 2.58M | 1.7% | first report | Aug 12, 2026 |
| Morgan Stanley | 2.41M | 1.6% | +240K | Aug 13, 2026 |
| UBS | 2.29M | 1.5% | +384K | Aug 13, 2026 |