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
401
$1.53M
402
$1.5M
403
$1.49M
404
$1.48M
405
$1.47M
406
$1.47M
407
$1.47M
408
$1.46M
409
$1.45M
410
$1.44M
411
$1.43M
412
$1.43M
413
$1.41M
414
$1.39M
415
$1.38M
416
$1.38M
417
$1.37M
418
$1.36M
419
$1.35M
420
$1.34M
421
$1.33M
422
$1.33M
423
$1.31M
424
$1.3M
425
$1.3M