X0306 4 2012-05-02 0 0000927003 ADVANCED ENERGY INDUSTRIES INC AEIS 0001202836 BECK RICHARD P 1625 SHARP POINT DRIVE FORT COLLINS CO 80525 1 0 0 0 Common Stock 2012-05-02 4 A 0 8000 0.00 A 41094 D Filing is late due to an administrative oversight by AEIS. The restricted stock units granted on May 2, 2012 will vest 100% at the anniversary of the grant date. Represents shares of restricted stock units. Mr. Beck has been granted a total of 52,000 RSUs in seven grants: (A) 2,000 RSUs granted on May 24, 2006; (B) 16,000 RSUs granted on May 2, 2007; (C) 6,000 RSUs granted on May 7, 2008; (D) 6,000 RSUs granted on May 6, 2009; (E) 6,000 RSUs granted on May 4, 2010. These grants vest annually in four equal installments beginning one year from grant date. (F) 8,000 RSUs granted on May 4, 2011 vested 100% on the first anniversary of the grant date; (F) 8,000 RSUs granted on May 2, 2012 will vest 100% on the first anniversary of the grant date. As of this filing, 39,500 restricted stock units are vested and held as well as 3,008 shares held in street name. Thomas O. McGimpsey - Attorney-in-Fact 2012-12-05