X0304 4 2012-02-13 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 2012-02-13 4 S 0 900 10.97 D 3203943 I By Trust Common Stock 2012-02-13 4 S 0 4183 10.98 D 3199760 I By Trust Common Stock 2012-02-13 4 S 0 200 10.9825 D 3199560 I By Trust Common Stock 2012-02-13 4 S 0 500 10.985 D 3199060 I By Trust Common Stock 2012-02-13 4 S 0 300 10.9875 D 3198760 I By Trust Common Stock 2012-02-13 4 S 0 5887 10.99 D 3192873 I By Trust Common Stock 2012-02-13 4 S 0 400 10.9925 D 3192473 I By Trust Common Stock 2012-02-13 4 S 0 2222 11.00 D 3190251 I By Trust Common Stock 2012-02-13 4 S 0 300 11.005 D 3189951 I By Trust Common Stock 2012-02-13 4 S 0 400 11.0075 D 3189551 I By Trust Common Stock 2012-02-13 4 S 0 800 11.01 D 3188751 I By Trust Common Stock 2012-02-13 4 S 0 100 11.015 D 3188651 I By Trust Common Stock 2012-02-13 4 S 0 1000 11.02 D 3187651 I By Trust Common Stock 2012-02-13 4 S 0 400 11.03 D 3187251 I By Trust Common Stock 2012-02-13 4 S 0 100 11.035 D 3187151 I By Trust Common Stock 2012-02-13 4 S 0 100 11.0375 D 3187051 I By Trust Common Stock 2012-02-13 4 S 0 600 11.04 D 3186451 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) 2012-02-14