1,004 hedge funds and large institutions have $29.5B invested in Biogen in 2021 Q4 according to their latest regulatory filings, with 144 funds opening new positions, 293 increasing their positions, 393 reducing their positions, and 153 closing their positions.

New
Increased
Maintained
Reduced
Closed

more ownership

Funds ownership:

less first-time investments, than exits

New positions opened: | Existing positions closed:

less funds holding

Funds holding:

less capital invested

Capital invested by funds: $ → $

25% less repeat investments, than reductions

Existing positions increased: 293 | Existing positions reduced: 393

27% less funds holding in top 10

Funds holding in top 10: 1511 (-4)

28% less call options, than puts

Call options by funds: $1.1B | Put options by funds: $1.52B

Holders
1,004
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
$1.1B
Puts
$1.52B
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
226
$7.08M
227
$7.08M
228
$7.04M
229
$7.03M
230
$6.97M
231
$6.9M
232
$6.67M
233
$6.61M
234
$6.61M
235
$6.59M
236
$6.52M
237
$6.49M
238
$6.43M
239
$6.37M
240
$6.3M
241
$6.23M
242
$6.2M
243
$6.13M
244
$6.01M
245
$6M
246
$5.88M
247
$5.88M
248
$5.78M
249
$5.71M
250
$5.71M