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
401
$2.07M
402
$2.06M
403
$2.05M
404
$2.04M
405
$2.02M
406
$1.99M
407
$1.98M
408
$1.98M
409
$1.97M
410
$1.95M
411
$1.94M
412
$1.92M
413
$1.91M
414
$1.9M
415
$1.87M
416
$1.86M
417
$1.84M
418
$1.84M
419
$1.83M
420
$1.79M
421
$1.79M
422
$1.78M
423
$1.75M
424
$1.74M
425
$1.71M