Biogen
BIIB
BIIB
854 hedge funds and large institutions have $16.2B invested in Biogen in 2025 Q2 according to their latest regulatory filings, with 94 funds opening new positions, 336 increasing their positions, 262 reducing their positions, and 98 closing their positions.
New
Increased
Maintained
Reduced
Closed
more funds holding in top 10
Funds holding in top 10: →
more repeat investments, than reductions
Existing positions increased: | Existing positions reduced:
more call options, than puts
Call options by funds: $ | Put options by funds: $
more ownership
Funds ownership: →
4% less first-time investments, than exits
New positions opened: 94 | Existing positions closed: 98
2% less funds holding
Funds holding: 868 → 854 (-14)
7% less capital invested
Capital invested by funds: $17.4B → $16.2B (-$1.13B)
Holders
854
Holding in Top 10
5
Calls
$381M
Puts
$333M
Top Buyers
| 1 | +$430M | |
| 2 | +$63.9M | |
| 3 | +$51.4M | |
| 4 |
Fidelity Investments
Boston,
Massachusetts
|
+$45.9M |
| 5 |
A
AustralianSuper
Melbourne,
Australia
|
+$42.9M |
Top Sellers
| 1 | -$208M | |
| 2 | -$159M | |
| 3 | -$98M | |
| 4 |
SG Americas Securities
New York
|
-$87.6M |
| 5 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
-$60.7M |
