870 hedge funds and large institutions have $20.2B invested in Biogen in 2024 Q4 according to their latest regulatory filings, with 130 funds opening new positions, 298 increasing their positions, 321 reducing their positions, and 158 closing their positions.

New
Increased
Maintained
Reduced
Closed

more ownership

Funds ownership:

less repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

less funds holding

Funds holding:

less call options, than puts

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

18% less first-time investments, than exits

New positions opened: 130 | Existing positions closed: 158

19% less capital invested

Capital invested by funds: $25.1B → $20.2B (-$4.83B)

38% less funds holding in top 10

Funds holding in top 10: 85 (-3)

Holders
870
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
5
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$310M
Puts
$356M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
526
$314K
527
$312K
528
$311K
529
$310K
530
$310K
531
$308K
532
$307K
533
$306K
534
$306K
535
$306K
536
$306K
537
$304K
538
$300K
539
$300K
540
$295K
541
$294K
542
$289K
543
$287K
544
$286K
545
$284K
546
$282K
547
$281K
548
$281K
549
$281K
550
$280K