994 hedge funds and large institutions have $33.5B invested in Biogen in 2023 Q4 according to their latest regulatory filings, with 133 funds opening new positions, 283 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: $32B → $33.5B (+$1.52B)

24% less repeat investments, than reductions

Existing positions increased: 283 | Existing positions reduced: 374

29% less funds holding in top 10

Funds holding in top 10: 1410 (-4)

Holders
994
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
10
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$643M
Puts
$499M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
401
$1.29M
402
$1.26M
403
$1.25M
404
$1.19M
405
$1.19M
406
$1.19M
407
$1.18M
408
$1.18M
409
$1.17M
410
$1.17M
411
$1.17M
412
$1.15M
413
$1.15M
414
$1.14M
415
$1.14M
416
$1.14M
417
$1.13M
418
$1.11M
419
$1.07M
420
$1.06M
421
$1.05M
422
$1.04M
423
$1.04M
424
$1.04M
425
$1.04M