1,007 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, 294 increasing their positions, 394 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: 294 | Existing positions reduced: 394

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
1,007
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
$593K
552
$588K
553
$587K
554
$587K
555
$585K
556
$584K
557
$579K
558
$576K
559
$575K
560
$571K
561
$566K
562
$560K
563
$559K
564
$558K
565
$546K
566
$545K
567
$545K
568
$542K
569
$536K
570
$535K
571
$527K
572
$524K
573
$522K
574
$521K
575
$516K