999 hedge funds and large institutions have $33.7B invested in Biogen in 2023 Q4 according to their latest regulatory filings, with 133 funds opening new positions, 287 increasing their positions, 374 reducing their positions, and 81 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more call options, than puts

Call options by funds: $ | Put options by funds: $

more funds holding

Funds holding:

more ownership

Funds ownership:

5% more capital invested

Capital invested by funds: $32.1B → $33.7B (+$1.55B)

23% less repeat investments, than reductions

Existing positions increased: 287 | Existing positions reduced: 374

27% less funds holding in top 10

Funds holding in top 10: 1511 (-4)

Holders
999
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
11
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$645M
Puts
$499M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
201
$8.04M
202
$8.02M
203
$7.82M
204
$7.74M
205
$7.49M
206
$7.41M
207
$7.28M
208
$7.15M
209
$7.15M
210
$7.09M
211
$7.04M
212
$7M
213
$6.95M
214
$6.76M
215
$6.69M
216
$6.57M
217
$6.5M
218
$6.47M
219
$6.47M
220
$6.47M
221
$6.45M
222
$6.37M
223
$6.31M
224
$6.29M
225
$6.27M