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
301
$4.12M
302
$4.01M
303
$3.99M
304
$3.95M
305
$3.9M
306
$3.83M
307
$3.78M
308
$3.72M
309
$3.71M
310
$3.71M
311
$3.66M
312
$3.49M
313
$3.48M
314
$3.47M
315
$3.44M
316
$3.44M
317
$3.39M
318
$3.32M
319
$3.31M
320
$3.28M
321
$3.23M
322
$3.17M
323
$3.16M
324
$3.16M
325
$3.15M