X0306 4 2013-03-21 0 0000874238 STERLING CONSTRUCTION CO INC STRL 0001500905 MANNING BRIAN R 20810 FERNBUSH LANE HOUSTON TX 77073 0 1 0 0 Exec. VP & CBDO Common Stock 2013-03-21 4 A 0 2166 0 A 231592 D Common Stock 34079 I Held in a trust These shares were awarded to the Reporting Person by the Company as incentive compensation pursuant to the Reporting Person's employment agreement. The shares are subject to restrictions on their sale or other transfer and to forfeiture under certain circumstances. These shares are held in a trust for the Reporting Person's benefit of which he is a co-trustee. Roger M. Barzun, under a Power of Attorney 2013-03-21