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
376
$1.46M
377
$1.46M
378
$1.45M
379
$1.44M
380
$1.43M
381
$1.43M
382
$1.42M
383
$1.38M
384
$1.37M
385
$1.37M
386
$1.36M
387
$1.36M
388
$1.36M
389
$1.35M
390
$1.34M
391
$1.34M
392
$1.34M
393
$1.33M
394
$1.33M
395
$1.32M
396
$1.32M
397
$1.31M
398
$1.31M
399
$1.3M
400
$1.29M