972 hedge funds and large institutions have $85.3B invested in Biogen in 2015 Q2 according to their latest regulatory filings, with 100 funds opening new positions, 367 increasing their positions, 347 reducing their positions, and 85 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
972
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
52
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.21B
Puts
$1.72B
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
26
$677M
27
$637M
28
$633M
29
$629M
30
$579M
31
$541M
32
$524M
33
$520M
34
$518M
35
$517M
36
$471M
37
$447M
38
$409M
39
$403M
40
$383M
41
$372M
42
$352M
43
$350M
44
$346M
45
$324M
46
$309M
47
$286M
48
$285M
49
$284M
50
$283M