1,037 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, 350 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
1,037
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 +$226M
2 +$136M
3 +$131M
4
JP Morgan Chase
JP Morgan Chase
New York
+$82.1M
5
Amundi
Amundi
France
+$77.1M

Top Sellers

1 -$210M
2 -$135M
3 -$115M
4
Renaissance Technologies
Renaissance Technologies
New York
-$114M
5
Northern Trust
Northern Trust
Illinois
-$101M
Name Holding Trade Value Shares
Change
Change in
Stake
451
$1.43M
452
$1.42M
453
$1.41M
454
$1.38M
455
$1.37M
456
$1.37M
457
$1.36M
458
$1.33M
459
$1.33M
460
$1.32M
461
$1.3M
462
$1.3M
463
$1.29M
464
$1.29M
465
$1.28M
466
$1.28M
467
$1.28M
468
$1.26M
469
$1.24M
470
$1.22M
471
$1.22M
472
$1.21M
473
$1.21M
474
$1.2M
475
$1.2M