646 hedge funds and large institutions have $47.5B invested in Biogen in 2013 Q2 according to their latest regulatory filings, with 646 funds opening new positions, increasing their positions, reducing their positions, and closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
646
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
29
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$527M
Puts
$606M
Net Calls
Net Calls Change

Top Buyers

No buyers this quarter

Top Sellers

No sellers this quarter
Name Holding Trade Value Shares
Change
Change in
Stake
51
$133M
52
$133M
53
$128M
54
$127M
55
$127M
56
$125M
57
$124M
58
$120M
59
$120M
60
$111M
61
$106M
62
$106M
63
$100M
64
$97.7M
65
$97.4M
66
$96.5M
67
$94.8M
68
$93.2M
69
$91.8M
70
$90M
71
$89M
72
$86.5M
73
$83.2M
74
$80.2M
75
$79.5M