Positron Corporation (POSC)

[dwh]

88,361,559 shares shorted since 4/13/2010.

4/13/2010 --5,076,670
4/14/2010 --6,291,683
4/15/2010 --2,365,453
4/16/2010 --1,869,800
4/19/2010 --3,772,557
4/20/2010 --3,836,016
4/21/2010 -17,356,458
4/22/2010 --6,980,577
4/23/2010 --6,453,818
4/26/2010 --7,593,737
4/27/2010 --5,430,189
4/28/2010 --7,314,415
4/29/2010 --6,443,557
4/30/2010 --4,262,710
5/03/2010 --3,313,919

http://regsho.finra.org/regsho-Index.html

There's probably been some covering - no way to tell how many though.