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
451
$489K
452
$485K
453
$481K
454
$479K
455
$468K
456
$466K
457
$463K
458
$460K
459
$460K
460
$460K
461
$459K
462
$456K
463
$450K
464
$448K
465
$443K
466
$442K
467
$438K
468
$431K
469
$430K
470
$427K
471
$425K
472
$422K
473
$422K
474
$420K
475
$419K