X0303 4 2010-05-04 0 0000927003 ADVANCED ENERGY INDUSTRIES INC AEIS 0001228895 DOAN TRUNG T 1625 SHARP POINT DRIVE FORT COLLINS CO 80525 1 0 0 0 Common Stock 2010-05-04 4 A 0 6000 0.00 A 36000 D The restricted stock units granted on May 4, 2009 will vest in four equal annual installments beginning on the first anniversary of the grant date. Represents shares of restricted stock units. Mr. Doan has been granted a total of 36,000 RSUs in five grants: (A) 2,000 RSUs granted on May 24, 2006; (B) 16,000 RSUs on May 2, 2007; (C) 6,000 RSUs on May 7, 2008; (D) 6,000 RSUs on May 6, 2009 and (E)6,000 RSUs on May 4, 2010. All RSU grants vest annually in four equal installments beginning one year from grant date. As of this filing, 15,000 RSUs have vested. Thomas O. McGimpsey - Attorney-in-Fact 2010-05-06