863 hedge funds and large institutions have $20.1B invested in Biogen in 2024 Q4 according to their latest regulatory filings, with 129 funds opening new positions, 293 increasing their positions, 320 reducing their positions, and 158 closing their positions.

New
Increased
Maintained
Reduced
Closed

more ownership

Funds ownership:

less repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

less funds holding

Funds holding:

less call options, than puts

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

18% less first-time investments, than exits

New positions opened: 129 | Existing positions closed: 158

19% less capital invested

Capital invested by funds: $24.9B → $20.1B (-$4.83B)

50% less funds holding in top 10

Funds holding in top 10: 84 (-4)

Holders
863
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
4
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$308M
Puts
$356M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
326
$1.41M
327
$1.4M
328
$1.38M
329
$1.37M
330
$1.37M
331
$1.36M
332
$1.34M
333
$1.34M
334
$1.32M
335
$1.32M
336
$1.3M
337
$1.28M
338
$1.28M
339
$1.26M
340
$1.23M
341
$1.23M
342
$1.23M
343
$1.2M
344
$1.19M
345
$1.18M
346
$1.17M
347
$1.16M
348
$1.15M
349
$1.14M
350
$1.12M