1,037 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, 350 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
1,037
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 +$226M
2 +$136M
3 +$131M
4
JP Morgan Chase
JP Morgan Chase
New York
+$82.1M
5
Amundi
Amundi
France
+$77.1M

Top Sellers

1 -$210M
2 -$135M
3 -$115M
4
Renaissance Technologies
Renaissance Technologies
New York
-$114M
5
Northern Trust
Northern Trust
Illinois
-$101M
Name Holding Trade Value Shares
Change
Change in
Stake
326
$3.57M
327
$3.57M
328
$3.44M
329
$3.4M
330
$3.32M
331
$3.25M
332
$3.25M
333
$3.24M
334
$3.24M
335
$3.23M
336
$3.15M
337
$3.15M
338
$3.15M
339
$3.15M
340
$3.11M
341
$3.08M
342
$3.08M
343
$3.08M
344
$3.08M
345
$3.07M
346
$3.04M
347
$3M
348
$2.99M
349
$2.98M
350
$2.97M