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
26
$574M
27
$568M
28
$553M
29
$549M
30
$544M
31
$506M
32
$505M
33
$480M
34
$450M
35
$416M
36
$399M
37
$395M
38
$394M
39
$367M
40
$358M
41
$349M
42
$337M
43
$321M
44
$295M
45
$284M
46
$272M
47
$265M
48
$264M
49
$258M
50
$255M