X0303 4 2010-05-17 0 0000927003 ADVANCED ENERGY INDUSTRIES INC AEIS 0001228910 SCHATZ DOUGLAS S & SCHATZ JILL E FAMILY TRUST PO BOX 481 FORT COLLINS CO 80522 0 0 1 0 0001007705 SCHATZ DOUGLAS S P.O. BOX 481 FORT COLLINS CO 80522 1 0 0 0 0001328181 Schatz Jill E P.O. BOX 481 FORT COLLINS CO 80522 0 0 1 0 Common Stock 2010-05-17 4 S 0 200 12.575 D 5360476 D Common Stock 2010-05-17 4 S 0 1300 12.58 D 5359176 D Common Stock 2010-05-17 4 S 0 200 12.585 D 5358976 D Common Stock 2010-05-17 4 S 0 1600 12.59 D 5357376 D Common Stock 2010-05-17 4 S 0 1760 12.60 D 5355616 D Common Stock 2010-05-17 4 S 0 600 12.61 D 5355016 D Common Stock 2010-05-17 4 S 0 1006 12.62 D 5354010 D Common Stock 2010-05-17 4 S 0 600 12.63 D 5353410 D Common Stock 2010-05-17 4 S 0 100 12.635 D 5353310 D Common Stock 2010-05-17 4 S 0 422 12.64 D 5352888 D Common Stock 2010-05-17 4 S 0 100 12.65 D 5352788 D Common Stock 2010-05-17 4 S 0 600 12.66 D 5352188 D Common Stock 2010-05-17 4 S 0 100 12.665 D 5352088 D Common Stock 2010-05-17 4 S 0 200 12.67 D 5351888 D Common Stock 2010-05-17 4 S 0 200 12.68 D 5351688 D Common Stock 2010-05-17 4 S 0 600 12.69 D 5351088 D Common Stock 2010-05-17 4 S 0 66 12.70 D 5351022 D Common Stock 2010-05-17 4 S 0 400 12.76 D 5350622 D Common Stock 2010-05-17 4 S 0 200 12.77 D 5350422 D Common Stock 2010-05-17 4 S 0 100 12.775 D 5350322 D Common Stock 2010-05-17 4 S 0 1500 12.78 D 5348822 D Common Stock 2010-05-17 4 S 0 100 12.785 D 5348722 D Common Stock 2010-05-17 4 S 0 800 12.79 D 5347922 D Common Stock 2010-05-17 4 S 0 100 12.795 D 5347822 D Common Stock 2010-05-17 4 S 0 1300 12.80 D 5346522 D Common Stock 2010-05-17 4 S 0 800 12.81 D 5345722 D Common Stock 2010-05-17 4 S 0 983 12.82 D 5344739 D Common Stock 2010-05-17 4 S 0 600 12.83 D 5344139 D Common Stock 2010-05-17 4 S 0 100 12.835 D 5344039 D Common Stock 2010-05-17 4 S 0 100 12.837 D 5343939 D These shares are owned directly by Douglas S. Schatz & Jill E. Schatz Family Trust, a ten percent owner of the issuer, and indirectly by Douglas S. Schatz and Jill E. Schatz, co-trustees of the trust. Includes 26,350 shares of restricted stock units held directly by Douglas S. Schatz, who is a director of the Issuer. The Sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 Plan. /S/ Thomas O. McGimpsey (Attorney-in-Fact) 2010-05-19