1,035 hedge funds and large institutions have $34.9B invested in Biogen in 2021 Q3 according to their latest regulatory filings, with 72 funds opening new positions, 349 increasing their positions, 397 reducing their positions, and 124 closing their positions.

New
Increased
Maintained
Reduced
Closed

less ownership

Funds ownership:

less funds holding

Funds holding:

less repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

less capital invested

Capital invested by funds: $ → $

27% less call options, than puts

Call options by funds: $1.24B | Put options by funds: $1.7B

42% less first-time investments, than exits

New positions opened: 72 | Existing positions closed: 124

44% less funds holding in top 10

Funds holding in top 10: 2715 (-12)

Holders
1,035
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
15
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.24B
Puts
$1.7B
Net Calls
Net Calls Change

Top Buyers

1 +$195M
2 +$118M
3 +$113M
4
JP Morgan Chase
JP Morgan Chase
New York
+$70.9M
5
Amundi
Amundi
France
+$66.6M

Top Sellers

1 -$181M
2 -$117M
3 -$115M
4
Renaissance Technologies
Renaissance Technologies
New York
-$98.6M
5
Northern Trust
Northern Trust
Illinois
-$87.3M
Name Holding Trade Value Shares
Change
Change in
Stake
426
$1.7M
427
$1.7M
428
$1.7M
429
$1.66M
430
$1.66M
431
$1.62M
432
$1.59M
433
$1.58M
434
$1.56M
435
$1.55M
436
$1.54M
437
$1.54M
438
$1.54M
439
$1.53M
440
$1.53M
441
$1.53M
442
$1.5M
443
$1.49M
444
$1.49M
445
$1.48M
446
$1.48M
447
$1.48M
448
$1.44M
449
$1.43M
450
$1.42M