922 hedge funds and large institutions have $58.4B invested in Biogen in 2015 Q3 according to their latest regulatory filings, with 105 funds opening new positions, 406 increasing their positions, 283 reducing their positions, and 150 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
922
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
37
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.22B
Puts
$1.8B
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
26
$496M
27
$491M
28
$455M
29
$415M
30
$411M
31
$387M
32
$382M
33
$374M
34
$351M
35
$331M
36
$330M
37
$318M
38
$287M
39
$286M
40
$278M
41
$263M
42
$260M
43
$234M
44
$224M
45
$209M
46
$209M
47
$209M
48
$204M
49
$197M
50
$193M