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
276
$5.5M
277
$5.48M
278
$5.33M
279
$5.29M
280
$5.28M
281
$5.25M
282
$5.19M
283
$5.09M
284
$5M
285
$4.96M
286
$4.95M
287
$4.95M
288
$4.93M
289
$4.91M
290
$4.87M
291
$4.83M
292
$4.81M
293
$4.78M
294
$4.54M
295
$4.53M
296
$4.53M
297
$4.5M
298
$4.43M
299
$4.41M
300
$4.41M