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
201
$5.18M
202
$5.17M
203
$5.15M
204
$5.15M
205
$5.13M
206
$5.12M
207
$5.11M
208
$5.1M
209
$5.07M
210
$5M
211
$4.96M
212
$4.85M
213
$4.83M
214
$4.82M
215
$4.74M
216
$4.67M
217
$4.56M
218
$4.56M
219
$4.49M
220
$4.43M
221
$4.38M
222
$4.34M
223
$4.34M
224
$4.32M
225
$4.31M