X0304 4 2012-03-05 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 2012-03-05 4 S 0 1762 11.44 D 3101473 I By Trust Common Stock 2012-03-05 4 S 0 500 11.46 D 3100973 I By Trust Common Stock 2012-03-05 4 S 0 400 11.505 D 3100573 I By Trust Common Stock 2012-03-05 4 S 0 2600 11.51 D 3097973 I By Trust Common Stock 2012-03-05 4 S 0 1900 11.515 D 3096073 I By Trust Common Stock 2012-03-05 4 S 0 100 11.5175 D 3095973 I By Trust Common Stock 2012-03-05 4 S 0 6000 11.52 D 3089973 I By Trust Common Stock 2012-03-05 4 S 0 200 11.525 D 3089773 I By Trust Common Stock 2012-03-05 4 S 0 500 11.53 D 3089273 I By Trust Common Stock 2012-03-05 4 S 0 2714 11.54 D 3086559 I By Trust Common Stock 2012-03-05 4 S 0 1600 11.55 D 3084959 I By Trust Common Stock 2012-03-05 4 S 0 1800 11.56 D 3083159 I By Trust Common Stock 2012-03-05 4 S 0 1000 11.57 D 3082159 I By Trust Common Stock 2012-03-05 4 S 0 1700 11.59 D 3080459 I By Trust Common Stock 2012-03-05 4 S 0 200 11.615 D 3080259 I By Trust Common Stock 2012-03-05 4 S 0 600 11.62 D 3079659 I By Trust Common Stock 2012-03-05 4 S 0 1338 11.63 D 3078321 I By Trust Common Stock 2012-03-05 4 S 0 2000 11.64 D 3076321 I By Trust Common Stock 2012-03-05 4 S 0 1521 11.65 D 3074800 I By Trust Common Stock 2012-03-05 4 S 0 1893 11.66 D 3072907 I By Trust Common Stock 2012-03-05 4 S 0 500 11.665 D 3072407 I By Trust Common Stock 2012-03-05 4 S 0 1700 11.67 D 3070707 I By Trust Common Stock 2012-03-05 4 S 0 100 11.675 D 3070607 I By Trust Common Stock 2012-03-05 4 S 0 274 11.68 D 3070333 I By Trust Common Stock 2012-03-05 4 S 0 300 11.685 D 3070033 I By Trust Common Stock 2012-03-05 4 S 0 1100 11.69 D 3068933 I By Trust Common Stock 2012-03-05 4 S 0 1100 11.70 D 3067833 I By Trust Common Stock 2012-03-05 4 S 0 600 11.71 D 3067233 I By Trust Common Stock 2012-03-05 4 S 0 1008 11.72 D 3066225 I By Trust Common Stock 2012-03-05 4 S 0 900 11.725 D 3065325 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) 2012-03-06