1,002 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, 361 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)

12% less repeat investments, than reductions

Existing positions increased: 319 | Existing positions reduced: 361

Holders
1,002
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
JP Morgan Chase
JP Morgan Chase
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
276
$5.13M
277
$5.09M
278
$4.98M
279
$4.91M
280
$4.89M
281
$4.88M
282
$4.8M
283
$4.8M
284
$4.66M
285
$4.63M
286
$4.6M
287
$4.6M
288
$4.44M
289
$4.42M
290
$4.37M
291
$4.32M
292
$4.32M
293
$4.27M
294
$4.25M
295
$4.25M
296
$4.24M
297
$4.21M
298
$4.2M
299
$4.18M
300
$4.14M