1,001 hedge funds and large institutions have $36B invested in Biogen in 2023 Q2 according to their latest regulatory filings, with 97 funds opening new positions, 319 increasing their positions, 360 reducing their positions, and 84 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more capital invested

Capital invested by funds: $ → $

more funds holding

Funds holding:

less ownership

Funds ownership:

7% less call options, than puts

Call options by funds: $555M | Put options by funds: $599M

5% less funds holding in top 10

Funds holding in top 10: 1918 (-1)

11% less repeat investments, than reductions

Existing positions increased: 319 | Existing positions reduced: 360

Holders
1,001
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
18
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$555M
Puts
$599M
Net Calls
Net Calls Change

Top Buyers

1 +$968M
2 +$253M
3 +$174M
4
Alyeska Investment Group
Alyeska Investment Group
Illinois
+$105M
5
JPMorgan Chase & Co
JPMorgan Chase & Co
New York
+$103M

Top Sellers

1 -$639M
2 -$273M
3 -$150M
4
D.E. Shaw & Co
D.E. Shaw & Co
New York
-$139M
5
Millennium Management
Millennium Management
New York
-$134M
Name Holding Trade Value Shares
Change
Change in
Stake
226
$8.38M
227
$8.28M
228
$8.2M
229
$8.12M
230
$8.11M
231
$8.07M
232
$8.07M
233
$7.84M
234
$7.8M
235
$7.77M
236
$7.65M
237
$7.58M
238
$7.52M
239
$7.49M
240
$7.29M
241
$7.22M
242
$7.19M
243
$7.17M
244
$7.15M
245
$7.14M
246
$7.11M
247
$7.07M
248
$7.05M
249
$6.89M
250
$6.85M