994 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, 283 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: 283 | Existing positions reduced: 374

29% less funds holding in top 10

Funds holding in top 10: 1410 (-4)

Holders
994
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
$643M
Puts
$499M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
576
$477K
577
$476K
578
$476K
579
$474K
580
$473K
581
$472K
582
$469K
583
$466K
584
$466K
585
$464K
586
$460K
587
$456K
588
$455K
589
$455K
590
$449K
591
$446K
592
$443K
593
$442K
594
$438K
595
$437K
596
$436K
597
$433K
598
$432K
599
$432K
600
$432K