Guru Ownership Trend
Guru Analysis for Biogen Inc. (BIIB)
Biogen Inc. (BIIB), a key player in the Healthcare sector, continues to attract institutional attention.
As of Q3 2025, a total of 11 Super Investors (Gurus) hold positions in the company, with a combined stake valued at approximately $1.39 B.
Top institutional holders include Steven Cohen and Cliff Asness.
Institutional sentiment is currently Strongly Bullish. This is evidenced by a $80.03 M net inflow during the quarter.
Recent activity highlights Ray Dalio who opened a new position. Conversely, Jefferies Group reduced exposure by 17.6%.
| Portfolio Manager | % Portfolio | Activity | Shares | Value | Report Date |
|---|---|---|---|---|---|
| 0.91% | Add 1.1% | 3,872,901 | $542.52 M | Q3 2025 | |
| 0.16% | Add 30.7% | 1,783,581 | $248.81 M | Q3 2025 | |
| 0.18% | Reduce -7.7% | 964,406 | $135.09 M | Q3 2025 | |
| 1.05% | Add 15.0% | 567,518 | $79.5 M | Q3 2025 | |
| 0.01% | Reduce -4.1% | 277,285 | $38.84 M | Q3 2025 | |
| 0.16% | Add 65.5% | 270,498 | $37.89 M | Q3 2025 | |
| 0.02% | New Buy | 39,983 | $5.6 M | Q3 2025 | |
| 3.13% | Reduce -8.6% | 38,354 | $5.37 M | Q3 2025 | |
| 0.02% | Reduce -17.6% | 30,600 | $4.29 M | Q3 2025 | |
| 0.20% | Reduce -0.7% | 10,162 | $1.42 M | Q3 2025 | |
| 0.01% | Add 2.7% | 3,119 | $436,910 | Q3 2025 |
| Report Date | Portfolio Manager | Activity | Share Change | % Portfolio Change |
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| Report Date | Portfolio Manager | Activity | Share Change | % Portfolio Change |
|---|
| Report Date | Portfolio Manager | Activity | Share Change | % Portfolio Change |
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| Portfolio Manager | Option Type | % Portfolio | Activity | Shares | Value | Report Date |
|---|
Key Holders
Top 5 by Value
Top 5 by Conviction
Recent Activity Breakdown (Q3 2025)
Guru Consensus (Q3 2025)
FAQs for Biogen Inc. (BIIB)
Major holders include Steven Cohen ($542.52 M), Cliff Asness ($248.81 M), Renaissance Technologies ($135.09 M). According to the latest reported data, 11 tracked investment managers collectively hold approximately 7.86 M shares.
According to the latest 13F reporting period, sentiment appears Bullish (Net Buying). There was a net inflow of $80.03 M, with 6 managers increasing positions and 6 managers reducing holdings.
During the most recent reporting period, 5 managers trimmed their positions, while 1 fully exited BIIB. The total reported sell value was $15.15 M.
Yes, 1 managers opened new positions in BIIB, and 5 increased their existing holdings. The total reported buy value was $95.18 M.