X0305 5 2011-12-31 0 0 0 0000728331 SUTRON CORP strn 0001320449 Hooper Sidney Calvin 20621 PARKSIDE CIRCLE STERLING VA 20165 0 1 0 0 CFO Sutron Corp Common Stock 2011-11-30 5 S 0 L 100 5.195 D 156338 D Sutron Corp Common Stock 2011-11-30 5 S 0 L 100 5.15 D 156238 D Sutron Corp Common Stock 2011-12-07 5 S 0 L 1 5.4 D 156237 D Sutron Corp Common Stock 2011-12-07 5 S 0 L 206 5.09 D 156031 D Sutron Corp Common Stock 2011-12-13 5 S 0 L 200 5.25 D 155831 D Sutron Corp Common Stock 2011-12-22 5 G 0 L 5000 5.025 D 150831 D Sidney C. Hooper 2012-03-27