997 hedge funds and large institutions have $33.5B invested in Biogen in 2023 Q4 according to their latest regulatory filings, with 133 funds opening new positions, 285 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: $32B → $33.5B (+$1.52B)

24% less repeat investments, than reductions

Existing positions increased: 285 | Existing positions reduced: 374

29% less funds holding in top 10

Funds holding in top 10: 1410 (-4)

Holders
997
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
10
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
526
$589K
527
$580K
528
$569K
529
$568K
530
$568K
531
$564K
532
$561K
533
$560K
534
$558K
535
$556K
536
$554K
537
$554K
538
$553K
539
$550K
540
$544K
541
$544K
542
$540K
543
$537K
544
$537K
545
$534K
546
$532K
547
$530K
548
$530K
549
$526K
550
$525K