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
676
$296K
677
$296K
678
$295K
679
$294K
680
$293K
681
$290K
682
$288K
683
$288K
684
$285K
685
$285K
686
$282K
687
$282K
688
$281K
689
$279K
690
$278K
691
$276K
692
$273K
693
$270K
694
$270K
695
$270K
696
$269K
697
$269K
698
$268K
699
$268K
700
$268K