X0304 4 2012-03-19 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 2012-03-19 4 S 0 400 13.115 D 2998832 I By Trust Common Stock 2012-03-19 4 S 0 1500 13.12 D 2997332 I By Trust Common Stock 2012-03-19 4 S 0 200 13.125 D 2997132 I By Trust Common Stock 2012-03-19 4 S 0 1369 13.13 D 2995763 I By Trust Common Stock 2012-03-19 4 S 0 900 13.135 D 2994863 I By Trust Common Stock 2012-03-19 4 S 0 100 13.1375 D 2994763 I By Trust Common Stock 2012-03-19 4 S 0 3752 13.14 D 2991011 I By Trust Common Stock 2012-03-19 4 S 0 200 13.145 D 2990811 I By Trust Common Stock 2012-03-19 4 S 0 100 13.148 D 2990711 I By Trust Common Stock 2012-03-19 4 S 0 200 13.149 D 2990511 I By Trust Common Stock 2012-03-19 4 S 0 2075 13.15 D 2988436 I By Trust Common Stock 2012-03-19 4 S 0 1505 13.16 D 2986931 I By Trust Common Stock 2012-03-19 4 S 0 100 13.1675 D 2986831 I By Trust Common Stock 2012-03-19 4 S 0 701 13.17 D 2986130 I By Trust Common Stock 2012-03-19 4 S 0 2000 13.18 D 2984130 I By Trust Common Stock 2012-03-19 4 S 0 100 13.185 D 2984030 I By Trust Common Stock 2012-03-19 4 S 0 100 13.1875 D 2983930 I By Trust Common Stock 2012-03-19 4 S 0 1062 13.19 D 2982868 I By Trust Common Stock 2012-03-19 4 S 0 100 13.195 D 2982768 I By Trust Common Stock 2012-03-19 4 S 0 1600 13.20 D 2981168 I By Trust Common Stock 2012-03-19 4 S 0 700 13.22 D 2980468 I By Trust Common Stock 2012-03-19 4 S 0 700 13.23 D 2979768 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) 2012-03-21