Biogen
BIIB
BIIB
878 hedge funds and large institutions have $18.3B invested in Biogen in 2025 Q3 according to their latest regulatory filings, with 120 funds opening new positions, 311 increasing their positions, 259 reducing their positions, and 75 closing their positions.
New
Increased
Maintained
Reduced
Closed
more call options, than puts
Call options by funds: $ | Put options by funds: $
more first-time investments, than exits
New positions opened: | Existing positions closed:
more repeat investments, than reductions
Existing positions increased: | Existing positions reduced:
more capital invested
Capital invested by funds: $ → $
3% more funds holding
Funds holding: 855 → 878 (+23)
0.82% more ownership
Funds ownership: 88.15% → 88.98% (+0.82%)
40% less funds holding in top 10
Funds holding in top 10: 5 → 3 (-2)
Holders
878
Holding in Top 10
3
Calls
$573M
Puts
$316M
Top Buyers
| 1 | +$169M | |
| 2 | +$101M | |
| 3 | +$78.7M | |
| 4 |
Pictet Asset Management
Carouge,
Switzerland
|
+$75.7M |
| 5 |
Caisse de Depot et Placement du Quebec (CDPQ)
Montreal,
Quebec, Canada
|
+$70M |
Top Sellers
| 1 | -$124M | |
| 2 | -$119M | |
| 3 | -$87.1M | |
| 4 |
Wellington Management Group
Boston,
Massachusetts
|
-$77.3M |
| 5 |
Two Sigma Advisers
New York
|
-$61.9M |
