X0304 4 2012-02-06 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 2012-02-06 4 S 0 700 10.62 D 3278814 I By Trust Common Stock 2012-02-06 4 S 0 1700 10.63 D 3277114 I By Trust Common Stock 2012-02-06 4 S 0 1300 10.64 D 6275814 I By Trust Common Stock 2012-02-06 4 S 0 100 10.65 D 3275714 I By Trust Common Stock 2012-02-06 4 S 0 300 10.655 D 3275414 I By Trust Common Stock 2012-02-06 4 S 0 100 10.657 D 3275314 I By Trust Common Stock 2012-02-06 4 S 0 100 10.6575 D 3275214 I By Trust Common Stock 2012-02-06 4 S 0 2000 10.66 D 3273214 I By Trust Common Stock 2012-02-06 4 S 0 100 10.665 D 3273114 I By Trust Common Stock 2012-02-06 4 S 0 1200 10.675 D 3271914 I By Trust Common Stock 2012-02-06 4 S 0 100 10.6775 D 3271814 I By Trust Common Stock 2012-02-06 4 S 0 3800 10.68 D 3268014 I By Trust Common Stock 2012-02-06 4 S 0 300 10.685 D 3267714 I By Trust Common Stock 2012-02-06 4 S 0 500 10.695 D 3267214 I By Trust Common Stock 2012-02-06 4 S 0 2200 10.70 D 3265014 I By Trust Common Stock 2012-02-06 4 S 0 400 10.705 D 3264614 I By Trust Common Stock 2012-02-06 4 S 0 800 10.71 D 3263814 I By Trust Common Stock 2012-02-06 4 S 0 1400 10.715 D 3262414 I By Trust Common Stock 2012-02-06 4 S 0 3311 10.72 D 3259103 I By Trust Common Stock 2012-02-06 4 S 0 8858 10.73 D 3250245 I By Trust Common Stock 2012-02-06 4 S 0 200 10.735 D 3250045 I By Trust Common Stock 2012-02-06 4 S 0 3900 10.74 D 3246145 I By Trust Common Stock 2012-02-06 4 S 0 1200 10.745 D 3244945 I By Trust Common Stock 2012-02-06 4 S 0 100 10.7475 D 3244845 I By Trust Common Stock 2012-02-06 4 S 0 4035 10.75 D 3240810 I By Trust Common Stock 2012-02-06 4 S 0 200 10.755 D 3240610 I By Trust Common Stock 2012-02-06 4 S 0 300 10.76 D 3240310 I By Trust Common Stock 2012-02-06 4 S 0 100 10.77 D 3240210 I By Trust Common Stock 2012-02-06 4 S 0 800 10.78 D 3239410 I By Trust Common Stock 2012-02-06 4 S 0 1500 10.79 D 3237910 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) 2012-02-07