922 hedge funds and large institutions have $58.4B invested in Biogen in 2015 Q3 according to their latest regulatory filings, with 105 funds opening new positions, 406 increasing their positions, 283 reducing their positions, and 150 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
922
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
37
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.22B
Puts
$1.8B
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
1
$4.83B
2
$4.62B
3
$3.96B
4
$2.77B
5
$2.5B
6
$1.78B
7
$1.76B
8
$1.65B
9
$1.56B
10
$1.2B
11
$1.19B
12
$1.15B
13
$1.11B
14
$1B
15
$938M
16
$925M
17
$733M
18
$693M
19
$646M
20
$629M
21
$588M
22
$585M
23
$577M
24
$574M
25
$569M