1,059 hedge funds and large institutions have $31.7B invested in Biogen in 2020 Q4 according to their latest regulatory filings, with 170 funds opening new positions, 289 increasing their positions, 431 reducing their positions, and 148 closing their positions.

New
Increased
Maintained
Reduced
Closed

more call options, than puts

Call options by funds: $ | Put options by funds: $

more first-time investments, than exits

New positions opened: | Existing positions closed:

more ownership

Funds ownership:

more funds holding

Funds holding:

15% less capital invested

Capital invested by funds: $37.2B → $31.7B (-$5.44B)

33% less repeat investments, than reductions

Existing positions increased: 289 | Existing positions reduced: 431

61% less funds holding in top 10

Funds holding in top 10: 187 (-11)

Holders
1,059
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
7
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.98B
Puts
$1.64B
Net Calls
Net Calls Change

Top Sellers

1 -$309M
2 -$269M
3 -$201M
4
State Street
State Street
Massachusetts
-$137M
5
Vanguard Group
Vanguard Group
Pennsylvania
-$116M
Name Holding Trade Value Shares
Change
Change in
Stake
401
$2.14M
402
$2.12M
403
$2.09M
404
$2.08M
405
$2.07M
406
$2.07M
407
$2.04M
408
$2.03M
409
$2.03M
410
$2.01M
411
$2.01M
412
$1.99M
413
$1.97M
414
$1.96M
415
$1.94M
416
$1.93M
417
$1.92M
418
$1.9M
419
$1.85M
420
$1.85M
421
$1.84M
422
$1.82M
423
$1.82M
424
$1.81M
425
$1.8M