1,004 hedge funds and large institutions have $29.5B invested in Biogen in 2021 Q4 according to their latest regulatory filings, with 144 funds opening new positions, 293 increasing their positions, 393 reducing their positions, and 153 closing their positions.

New
Increased
Maintained
Reduced
Closed

more ownership

Funds ownership:

less first-time investments, than exits

New positions opened: | Existing positions closed:

less funds holding

Funds holding:

less capital invested

Capital invested by funds: $ → $

25% less repeat investments, than reductions

Existing positions increased: 293 | Existing positions reduced: 393

27% less funds holding in top 10

Funds holding in top 10: 1511 (-4)

28% less call options, than puts

Call options by funds: $1.1B | Put options by funds: $1.52B

Holders
1,004
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
11
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.1B
Puts
$1.52B
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
401
$1.55M
402
$1.55M
403
$1.49M
404
$1.48M
405
$1.47M
406
$1.45M
407
$1.44M
408
$1.44M
409
$1.41M
410
$1.4M
411
$1.39M
412
$1.38M
413
$1.37M
414
$1.34M
415
$1.33M
416
$1.32M
417
$1.31M
418
$1.3M
419
$1.27M
420
$1.27M
421
$1.27M
422
$1.27M
423
$1.27M
424
$1.26M
425
$1.25M