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
276
$2.49M
277
$2.48M
278
$2.46M
279
$2.42M
280
$2.4M
281
$2.4M
282
$2.38M
283
$2.37M
284
$2.34M
285
$2.33M
286
$2.32M
287
$2.29M
288
$2.28M
289
$2.28M
290
$2.22M
291
$2.22M
292
$2.22M
293
$2.21M
294
$2.16M
295
$2.15M
296
$2.13M
297
$2.12M
298
$2.11M
299
$2.09M
300
$2.04M