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
351
$1.12M
352
$1.09M
353
$1.09M
354
$1.08M
355
$1.07M
356
$1.07M
357
$1.07M
358
$1.06M
359
$1.05M
360
$1.05M
361
$1.05M
362
$1.04M
363
$1.03M
364
$1.02M
365
$1.01M
366
$1.01M
367
$990K
368
$979K
369
$965K
370
$964K
371
$961K
372
$944K
373
$926K
374
$924K
375
$902K