1,006 hedge funds and large institutions have $36.1B invested in Biogen in 2023 Q2 according to their latest regulatory filings, with 97 funds opening new positions, 320 increasing their positions, 363 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: 320 | Existing positions reduced: 363

Holders
1,006
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 +$1.01B
2 +$264M
3 +$181M
4
Alyeska Investment Group
Alyeska Investment Group
Illinois
+$109M
5
JP Morgan Chase
JP Morgan Chase
New York
+$108M

Top Sellers

1 -$668M
2 -$286M
3 -$157M
4
D.E. Shaw & Co
D.E. Shaw & Co
New York
-$145M
5
Millennium Management
Millennium Management
New York
-$140M
Name Holding Trade Value Shares
Change
Change in
Stake
326
$3.15M
327
$3.13M
328
$3.13M
329
$3.12M
330
$3.06M
331
$3.05M
332
$3.05M
333
$3.01M
334
$3M
335
$2.93M
336
$2.9M
337
$2.87M
338
$2.85M
339
$2.82M
340
$2.8M
341
$2.79M
342
$2.75M
343
$2.75M
344
$2.7M
345
$2.69M
346
$2.68M
347
$2.59M
348
$2.58M
349
$2.58M
350
$2.54M