865 hedge funds and large institutions have $20.1B invested in Biogen in 2024 Q4 according to their latest regulatory filings, with 130 funds opening new positions, 294 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: 130 | 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
865
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
301
$2.03M
302
$2M
303
$1.96M
304
$1.95M
305
$1.91M
306
$1.88M
307
$1.88M
308
$1.84M
309
$1.77M
310
$1.74M
311
$1.74M
312
$1.73M
313
$1.67M
314
$1.64M
315
$1.64M
316
$1.59M
317
$1.56M
318
$1.55M
319
$1.55M
320
$1.54M
321
$1.53M
322
$1.49M
323
$1.49M
324
$1.49M
325
$1.48M