818 hedge funds and large institutions have $71B invested in Biogen in 2014 Q3 according to their latest regulatory filings, with 91 funds opening new positions, 312 increasing their positions, 278 reducing their positions, and 47 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
818
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
41
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$754M
Puts
$1.23B
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
51
$254M
52
$241M
53
$233M
54
$215M
55
$214M
56
$197M
57
$182M
58
$176M
59
$171M
60
$170M
61
$170M
62
$162M
63
$155M
64
$153M
65
$152M
66
$150M
67
$150M
68
$147M
69
$145M
70
$142M
71
$141M
72
$139M
73
$134M
74
$120M
75
$117M