863 hedge funds and large institutions have $20.1B invested in Biogen in 2024 Q4 according to their latest regulatory filings, with 129 funds opening new positions, 293 increasing their positions, 320 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: 129 | Existing positions closed: 158

19% less capital invested

Capital invested by funds: $24.9B → $20.1B (-$4.83B)

50% less funds holding in top 10

Funds holding in top 10: 84 (-4)

Holders
863
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
4
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$308M
Puts
$356M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
451
$466K
452
$463K
453
$460K
454
$460K
455
$460K
456
$459K
457
$456K
458
$450K
459
$448K
460
$443K
461
$442K
462
$438K
463
$431K
464
$430K
465
$427K
466
$425K
467
$422K
468
$422K
469
$420K
470
$419K
471
$418K
472
$416K
473
$412K
474
$410K
475
$407K