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
426
$1.28M
427
$1.27M
428
$1.27M
429
$1.26M
430
$1.26M
431
$1.25M
432
$1.22M
433
$1.19M
434
$1.19M
435
$1.18M
436
$1.18M
437
$1.17M
438
$1.17M
439
$1.17M
440
$1.15M
441
$1.14M
442
$1.14M
443
$1.14M
444
$1.13M
445
$1.13M
446
$1.11M
447
$1.1M
448
$1.09M
449
$1.09M
450
$1.09M