X0306 4 2012-05-09 0000728331 SUTRON CORP STRN 0001381864 McQuivey Raul S 22400 DAVIS DRIVE STERLING VA 20164 1 1 1 0 Chairman, President, CEO Sutron Common Stock (Restricted Stock Unit) 2012-05-09 4 A 0 6000 D Sutron Common Stock 6000 116000 D Each restricted stock unit is the economic equivalent of one share of Sutron Corp common stock. Represents the conversion upon vesting of Restricted Stock Units into common stock. On May 9, 2012, the reporting person was granted 6,000 Restricted Stock Units, of which two blocks of Restricted Stock Units representing 1/4 of the original May 9, 2012 grant each are eligible for vesting and conversion on January 1, 2013. The remaining two blocks of Restricted Stock Units representing 1/4 of the original May 9, 2012 grant each are eligible for vesting and conversion on January 1, 2014. Figure represents 110,000 options granted on October 18, 2002 pursuant to the Issuer's 2002 Stock Option Plan and 2002 Stock Option Agreement, and 6,000 Restricted Stock Units granted on May 9, 2012. /s/ Raul S. McQuivey 2014-05-20