BIIB
Biogen Inc
4 of the 83 super-investors we track hold BIIB, worth a combined $217M per their latest 13F filings. The largest position: Hillman Capital Management at 3.8% of their portfolio. This quarter the cohort logged 0 buys and 1 sell on the name. Conviction score: 27 of 100 (how strongly the cohort backs it) — ranked #452 of 742 stocks.
Why super-investors own BIIB
BIIB is held by 4 super-investors in our cohort, with a combined position value of $217M. The highest-conviction owner is Hillman Capital Management at 3.8% of their portfolio. This quarter the cohort registered 1 trimmed.
AI-synthesized from 13F filings. Not investment advice.
Cohort owners over time
2016Q3 → 2026Q2How many of the cohort members held this stock each quarter.
Owners (4) · click any column to sort
| #↑ | Manager | % Port. | History | Value | Shares |
|---|---|---|---|---|---|
| 1 | Joel Greenblatt | 0.1% | 38q | $90M | 418,356 |
| 2 | Samantha McLemore | 2.0% | 10q | $61M | 283,697 |
| 3 | Sarah Ketterer | 0.7% | 8q | $60M | 278,283 |
| 4 | Hillman Capital Management | 3.8% | 27q | $5M | 23,993 |
Owners of BIIB also hold
Congress is trading BIIB
Congress tracker →- Gilbert Cisnerosbought$1,001 - $15,000 · 2026-06-05
- Maria Elvira Salazarsold$15,001 - $50,000 · 2026-06-02
- Maria Elvira Salazarbought$1,001 - $15,000 · 2026-05-12
- Maria Elvira Salazarbought$1,001 - $15,000 · 2026-05-11
- Maria Elvira Salazarbought$50,001 - $100,000 · 2026-05-11
- Gilbert Cisnerosbought$1,001 - $15,000 · 2026-01-30
STOCK Act periodic transaction reports; amounts are disclosed ranges. Who files late →
Recent activity (1)
| Manager | Move | % Port. | Δ Shares | Value | Filed |
|---|---|---|---|---|---|
| Samantha McLemore | TRIM | 2.0% | -25% | $61M | Aug 13, 2026 |
Long US equity 13F-HR filings only. CUSIP 09062X103. Not investment advice.