X0306 4 2015-07-27 1 0000728331 SUTRON CORP STRN 0001608488 Goold Glen E. 22400 DAVIS DRIVE STERLING VA 20164 0 1 0 0 Chief Financial Officer Non-Qualified Stock Option 4.52 2015-07-27 4 H 0 100000 3.98 D 2025-07-27 Common Stock 100000 0 D Pursuant to the Agreement and Plan of Merger, dated June 21, 2015, by and among Danaher Corporation, Satellite Acquisition Corp., and Sutron Corporation (the "Merger Agreement"), this option was vested in full and cancelled in the merger in exchange for a cash amount equal to the number of shares underlying this option multiplied by the difference between the per share merger consideration of $8.50 and the per share exercise price of this option /s/ Glen Goold 2015-07-28