Biogen
BIIB
BIIB
993 hedge funds and large institutions have $24.6B invested in Biogen in 2025 Q4 according to their latest regulatory filings, with 186 funds opening new positions, 319 increasing their positions, 296 reducing their positions, and 80 closing their positions.
New
Increased
Maintained
Reduced
Closed
more funds holding in top 10
Funds holding in top 10: →
more first-time investments, than exits
New positions opened: | Existing positions closed:
more call options, than puts
Call options by funds: $ | Put options by funds: $
more capital invested
Capital invested by funds: $ → $
10% more funds holding
Funds holding: 903 → 993 (+90)
5.7% more ownership
Funds ownership: 89.56% → 95.26% (+5.7%)
8% more repeat investments, than reductions
Existing positions increased: 319 | Existing positions reduced: 296
Holders
993
Holding in Top 10
8
Calls
$715M
Puts
$454M
Top Buyers
| 1 | +$1.33B | |
| 2 | +$281M | |
| 3 | +$130M | |
| 4 |
JP Morgan Chase
New York
|
+$96.2M |
| 5 |
HF
HRT Financial
New York
|
+$62.1M |
Top Sellers
| 1 | -$173M | |
| 2 | -$125M | |
| 3 | -$114M | |
| 4 |
Balyasny Asset Management
Chicago,
Illinois
|
-$102M |
| 5 |
Man Group
London,
United Kingdom
|
-$94.6M |