1,035 hedge funds and large institutions have $34.9B invested in Biogen in 2021 Q3 according to their latest regulatory filings, with 72 funds opening new positions, 349 increasing their positions, 397 reducing their positions, and 124 closing their positions.

New
Increased
Maintained
Reduced
Closed

less ownership

Funds ownership:

less funds holding

Funds holding:

less repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

less capital invested

Capital invested by funds: $ → $

27% less call options, than puts

Call options by funds: $1.24B | Put options by funds: $1.7B

42% less first-time investments, than exits

New positions opened: 72 | Existing positions closed: 124

44% less funds holding in top 10

Funds holding in top 10: 2715 (-12)

Holders
1,035
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
15
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.24B
Puts
$1.7B
Net Calls
Net Calls Change

Top Buyers

1 +$195M
2 +$118M
3 +$113M
4
JP Morgan Chase
JP Morgan Chase
New York
+$70.9M
5
Amundi
Amundi
France
+$66.6M

Top Sellers

1 -$181M
2 -$117M
3 -$115M
4
Renaissance Technologies
Renaissance Technologies
New York
-$98.6M
5
Northern Trust
Northern Trust
Illinois
-$87.3M
Name Holding Trade Value Shares
Change
Change in
Stake
326
$3.44M
327
$3.4M
328
$3.32M
329
$3.25M
330
$3.25M
331
$3.24M
332
$3.24M
333
$3.23M
334
$3.15M
335
$3.15M
336
$3.15M
337
$3.15M
338
$3.11M
339
$3.08M
340
$3.08M
341
$3.08M
342
$3.08M
343
$3.07M
344
$3.04M
345
$3M
346
$2.99M
347
$2.98M
348
$2.97M
349
$2.96M
350
$2.91M