X0306 4 2015-01-29 0 0000874238 STERLING CONSTRUCTION CO INC STRL 0001587243 WRIGHT THOMAS R 1800 HUGHES LANDING BLVD. SUITE 250 THE WOODLANDS TX 77380 0 1 0 0 EVP & Chief Financial Officer Common Stock 2015-01-29 4 A 0 16677 0 A 28177 D Common Stock 2015-01-29 4 A 0 29781 0 A 57958 D Restricted Stock Units 2015-01-29 4 A 0 29781 0 A 2017-12-31 2017-12-31 Common Stock 29781 29781 D These shares were awarded to the Reporting Person by the Company as incentive compensation pursuant to the Company's 2014 Incentive Compensation Plan. The shares are subject to restrictions on their sale or other transfer and to forfeiture under certain circumstances. These shares were awarded to the Reporting Person pursuant to the Company's 2015 Long-Term Incentive Program and are subject to restrictions on their sale or other transfer and to forfeiture under certain circumstances. Each restricted stock unit represents the contingent right to receive one share of common stock if or when the restricted stock unit vests. The restricted stock units vest, if at all, on December 31, 2017 to the extent of the achievement by the Company of a financial goal. Units that do not vest are forfeited. These restricted stock units were issued to the Reporting Person pursuant to the Company's 2015 Long-Term Incentive Compensation Program. Roger M. Barzun under a Power of Attorney 2015-02-02