X0303 4 2011-03-28 0 0000927003 ADVANCED ENERGY INDUSTRIES INC AEIS 0001007705 SCHATZ DOUGLAS S P.O. BOX 481 FORT COLLINS CO 80522 1 0 0 0 Common Stock 2011-03-28 4 S 0 200 16.20 D 3908447 I By Trust Common Stock 2011-03-28 4 S 0 710 16.22 D 3907737 I By Trust Common Stock 2011-03-28 4 S 0 700 16.23 D 3907037 I By Trust Common Stock 2011-03-28 4 S 0 3000 16.25 D 3904037 I By Trust Common Stock 2011-03-28 4 S 0 100 16.255 D 3903937 I By Trust Common Stock 2011-03-28 4 S 0 4900 16.26 D 3899037 I By Trust Common Stock 2011-03-28 4 S 0 3800 16.27 D 3895237 I By Trust Common Stock 2011-03-28 4 S 0 300 16.275 D 3894937 I By Trust Common Stock 2011-03-28 4 S 0 1100 16.28 D 3893837 I By Trust Common Stock 2011-03-28 4 S 0 200 16.29 D 3893637 I By Trust Common Stock 2011-03-28 4 S 0 100 16.295 D 3893537 I By Trust Common Stock 2011-03-28 4 S 0 1700 16.30 D 3891837 I By Trust Common Stock 2011-03-28 4 S 0 100 16.305 D 3891737 I By Trust Common Stock 2011-03-28 4 S 0 200 16.31 D 3891537 I By Trust Common Stock 2011-03-28 4 S 0 100 16.3175 D 3891437 I By Trust Common Stock 2011-03-28 4 S 0 198 16.32 D 3891239 I By Trust Common Stock 2011-03-28 4 S 0 100 16.325 D 3891139 I By Trust Common Stock 2011-03-28 4 S 0 100 16.335 D 3891039 I By Trust Common Stock 2011-03-28 4 S 0 600 16.34 D 3890439 I By Trust Douglas S. Schatz and Jill E. Schatz, husband and wife, are co-trustees of the Family Trust and may be deemed to be indirect beneficial owners of the shares of AEIS common stock held directly by the Family Trust. Douglas S. Schatz is a director of AEIS. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 Plan. /s/ Thomas O. McGimpsey (Attorney-in-Fact) 2011-03-29