862 hedge funds and large institutions have $20.1B invested in Biogen in 2024 Q4 according to their latest regulatory filings, with 130 funds opening new positions, 292 increasing their positions, 319 reducing their positions, and 158 closing their positions.

New
Increased
Maintained
Reduced
Closed

more ownership

Funds ownership:

less repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

less funds holding

Funds holding:

less call options, than puts

Call options by funds: $ | Put options by funds: $

18% less first-time investments, than exits

New positions opened: 130 | Existing positions closed: 158

18% less capital invested

Capital invested by funds: $24.5B → $20.1B (-$4.39B)

50% less funds holding in top 10

Funds holding in top 10: 84 (-4)

Holders
862
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
4
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$308M
Puts
$356M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
1
$2.56B
2
$2.45B
3
$2.37B
4
$1.13B
5
$754M
6
$564M
7
$474M
8
$408M
9
$356M
10
$326M
11
$321M
12
$296M
13
$273M
14
$267M
15
$246M
16
$237M
17
$235M
18
$188M
19
$183M
20
$182M
21
$179M
22
$167M
23
$163M
24
$160M
25
$156M