STERLING INFRASTRUCTURE, INC. — Director's Dealing 2012

May 14, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: STERLING CONSTRUCTION CO INC (STRL)
CIK: 0000874238
Period of Report: 2012-05-14

Reporting Person: COLOMBO ANTHONY F (Exec. VP Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-14	Common Stock	M	2800	$1.725	Acquired	65011	Direct
2012-05-14	Common Stock	M	3000	$3.05	Acquired	68011	Direct
2012-05-14	Common Stock	M	3500	$3.10	Acquired	71511	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-14	Employee Stock Option (right to buy) (Common Stock)	$1.725	M	2800	Disposed	2012-07-24	Common Stock (2800)	Direct
2012-05-14	Employee Stock Option (right to buy) (Common Stock)	$3.050	M	3000	Disposed	2013-08-20	Common Stock (3000)	Direct
2012-05-14	Employee Stock Option (right to buy) (Common Stock)	$3.10	M	3500	Disposed	2014-08-12	Common Stock (3500)	Direct

Footnotes

F1: These shares became exercisable in five equal annual installments commencing on the first anniversary of the July 24, 2002 grant date.

F2: These shares became exercisable in five equal annual installments commencing on the first anniversary of the August 20, 2003 grant date.

F3: These shares Became exercisable in five equal annual installments commencing on the first anniversary of the August 12, 2004 grant date.