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
1
$8.78B
2
$6.67B
3
$5.41B
4
$4.23B
5
$3.84B
6
$3.23B
7
$2.45B
8
$2B
9
$1.96B
10
$1.95B
11
$1.91B
12
$1.87B
13
$1.33B
14
$1.25B
15
$1.25B
16
$1.06B
17
$967M
18
$901M
19
$899M
20
$896M
21
$870M
22
$865M
23
$778M
24
$740M
25
$735M