999 hedge funds and large institutions have $33.7B invested in Biogen in 2023 Q4 according to their latest regulatory filings, with 133 funds opening new positions, 287 increasing their positions, 374 reducing their positions, and 81 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more call options, than puts

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

more funds holding

Funds holding:

more ownership

Funds ownership:

5% more capital invested

Capital invested by funds: $32.1B → $33.7B (+$1.55B)

23% less repeat investments, than reductions

Existing positions increased: 287 | Existing positions reduced: 374

27% less funds holding in top 10

Funds holding in top 10: 1511 (-4)

Holders
999
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
$645M
Puts
$499M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
601
$432K
602
$432K
603
$432K
604
$430K
605
$430K
606
$430K
607
$428K
608
$427K
609
$427K
610
$427K
611
$426K
612
$422K
613
$416K
614
$415K
615
$414K
616
$404K
617
$403K
618
$400K
619
$400K
620
$400K
621
$398K
622
$396K
623
$388K
624
$385K
625
$382K