993 hedge funds and large institutions have $33.5B invested in Biogen in 2023 Q4 according to their latest regulatory filings, with 132 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
993
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
326
$2.29M
327
$2.26M
328
$2.23M
329
$2.2M
330
$2.2M
331
$2.2M
332
$2.12M
333
$2.08M
334
$2.05M
335
$2.04M
336
$2.02M
337
$1.99M
338
$1.99M
339
$1.95M
340
$1.95M
341
$1.95M
342
$1.93M
343
$1.89M
344
$1.86M
345
$1.86M
346
$1.83M
347
$1.82M
348
$1.81M
349
$1.8M
350
$1.77M