Biogen Inc.
BIIBLast close · Oct 16, 2026232.65−2.70 (−1.15%)
Market cap$34.4B
Of the 85 managers this site tracks, 3 held Biogen (BIIB) at the end of Q2 2026, their latest 13Fs. The largest position by value was Samantha McLemore's, $61.3M; Sarah Ketterer's ($60.1M) and Hillman Capital's ($5.2M) follow. No Schedule 13D or 13G is on file for BIIB from the activists and large holders the site follows.
Superinvestors holding BIIB
| Manager | Firm | Quarter | Shares | Value |
|---|---|---|---|---|
| Samantha McLemore | Patient Capital Management, LLC | Q2 2026 | 283,697 | $61.3M |
| Sarah Ketterer | Causeway Capital Management LLC | Q2 2026 | 278,283 | $60.1M |
| Hillman Capital | Hillman Capital Management, Inc. | Q2 2026 | 23,993 | $5.2M |
13D/13G are SEC beneficial-ownership disclosures, triggered only above 5%; a 13F is a quarterly snapshot filed up to 45 days after quarter end. Superinvestor names link to their full portfolios under Investors.