1,004 hedge funds and large institutions have $29.5B invested in Biogen in 2021 Q4 according to their latest regulatory filings, with 144 funds opening new positions, 293 increasing their positions, 393 reducing their positions, and 153 closing their positions.

New
Increased
Maintained
Reduced
Closed

more ownership

Funds ownership:

less first-time investments, than exits

New positions opened: | Existing positions closed:

less funds holding

Funds holding:

less capital invested

Capital invested by funds: $ → $

25% less repeat investments, than reductions

Existing positions increased: 293 | Existing positions reduced: 393

27% less funds holding in top 10

Funds holding in top 10: 1511 (-4)

28% less call options, than puts

Call options by funds: $1.1B | Put options by funds: $1.52B

Holders
1,004
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
11
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.1B
Puts
$1.52B
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
26
$192M
27
$190M
28
$187M
29
$178M
30
$160M
31
$154M
32
$147M
33
$143M
34
$137M
35
$136M
36
$132M
37
$126M
38
$121M
39
$117M
40
$115M
41
$112M
42
$111M
43
$110M
44
$109M
45
$109M
46
$109M
47
$108M
48
$108M
49
$99.1M
50
$98.6M