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Biogen
BIIB
BIIB
997 hedge funds and large institutions have $24.6B invested in Biogen in 2025 Q4 according to their latest regulatory filings, with 188 funds opening new positions, 321 increasing their positions, 296 reducing their positions, and 80 closing their positions.
New
Increased
Maintained
Reduced
Closed
167% more funds holding in top 10
Funds holding in top 10: 3 → 8 (+5)
135% more first-time investments, than exits
New positions opened: 188 | Existing positions closed: 80
58% more call options, than puts
Call options by funds: $715M | Put options by funds: $454M
33% more capital invested
Capital invested by funds: $18.5B → $24.6B (+$6.13B)
10% more funds holding
Funds holding: 905 → 997 (+92)
5.71% more ownership
Funds ownership: 89.57% → 95.27% (+5.7%)
8% more repeat investments, than reductions
Existing positions increased: 321 | Existing positions reduced: 296
Holders
997
Holders Change
+92
Holders Change %
+10.17%
% of All Funds
12.13%
Holding in Top 10
8
Holding in Top 10 Change
+5
Holding in Top 10 Change %
+166.67%
% of All Funds
0.1%
New
188
Increased
321
Reduced
296
Closed
80
Calls
$715M
Puts
$454M
Net Calls
+$262M
Net Calls Change
+$4.73M
Top Buyers
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$1.33B |
| 2 |
Boston Partners
Boston,
Massachusetts
|
+$281M |
| 3 |
FAM
Fred Alger Management
New York
|
+$130M |
| 4 |
JP Morgan Chase
New York
|
+$96.2M |
| 5 |
HF
HRT Financial
New York
|
+$62.1M |
Top Sellers
| 1 |
Point72 Asset Management
Stamford,
Connecticut
|
-$173M |
| 2 |
Invesco
Atlanta,
Georgia
|
-$125M |
| 3 |
Wellington Management Group
Boston,
Massachusetts
|
-$114M |
| 4 |
Balyasny Asset Management
Chicago,
Illinois
|
-$102M |
| 5 |
Man Group
London,
United Kingdom
|
-$94.6M |
