1,007 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, 294 increasing their positions, 394 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: 294 | Existing positions reduced: 394

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
1,007
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
376
$1.93M
377
$1.9M
378
$1.89M
379
$1.88M
380
$1.85M
381
$1.82M
382
$1.77M
383
$1.76M
384
$1.75M
385
$1.75M
386
$1.74M
387
$1.74M
388
$1.74M
389
$1.72M
390
$1.72M
391
$1.72M
392
$1.72M
393
$1.69M
394
$1.68M
395
$1.65M
396
$1.65M
397
$1.63M
398
$1.61M
399
$1.6M
400
$1.56M