999 hedge funds and large institutions have $33.7B invested in Biogen in 2023 Q4 according to their latest regulatory filings, with 133 funds opening new positions, 287 increasing their positions, 374 reducing their positions, and 81 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more call options, than puts

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

more funds holding

Funds holding:

more ownership

Funds ownership:

5% more capital invested

Capital invested by funds: $32.1B → $33.7B (+$1.55B)

23% less repeat investments, than reductions

Existing positions increased: 287 | Existing positions reduced: 374

27% less funds holding in top 10

Funds holding in top 10: 1511 (-4)

Holders
999
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
$645M
Puts
$499M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
401
$1.31M
402
$1.3M
403
$1.29M
404
$1.29M
405
$1.26M
406
$1.25M
407
$1.19M
408
$1.19M
409
$1.19M
410
$1.18M
411
$1.18M
412
$1.17M
413
$1.17M
414
$1.17M
415
$1.15M
416
$1.15M
417
$1.14M
418
$1.14M
419
$1.14M
420
$1.13M
421
$1.11M
422
$1.07M
423
$1.06M
424
$1.05M
425
$1.04M