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
551
$587K
552
$587K
553
$585K
554
$584K
555
$579K
556
$576K
557
$575K
558
$571K
559
$566K
560
$560K
561
$559K
562
$558K
563
$546K
564
$545K
565
$545K
566
$542K
567
$536K
568
$535K
569
$527K
570
$524K
571
$522K
572
$521K
573
$516K
574
$516K
575
$515K