X0303 4 2010-04-26 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 2010-04-26 4 S 0 100 16.205 D 5739576 D Common Stock 2010-04-26 4 S 0 400 16.21 D 5739176 D Common Stock 2010-04-26 4 S 0 500 16.215 D 5738676 D Common Stock 2010-04-26 4 S 0 1200 16.22 D 5737476 D Common Stock 2010-04-26 4 S 0 300 16.225 D 5737176 D Common Stock 2010-04-26 4 S 0 200 16.2275 D 5736976 D Common Stock 2010-04-26 4 S 0 3788 16.23 D 5733188 D Common Stock 2010-04-26 4 S 0 300 16.235 D 5732888 D Common Stock 2010-04-26 4 S 0 1300 16.24 D 5731588 D Common Stock 2010-04-26 4 S 0 200 16.245 D 5731388 D Common Stock 2010-04-26 4 S 0 3632 16.25 D 5727756 D Common Stock 2010-04-26 4 S 0 400 16.2575 D 5727356 D Common Stock 2010-04-26 4 S 0 4986 16.26 D 5722370 D Common Stock 2010-04-26 4 S 0 500 16.265 D 5721870 D Common Stock 2010-04-26 4 S 0 3656 16.27 D 5718214 D Common Stock 2010-04-26 4 S 0 500 16.275 D 5717714 D Common Stock 2010-04-26 4 S 0 4206 16.28 D 5713508 D Common Stock 2010-04-26 4 S 0 600 16.285 D 5712908 D Common Stock 2010-04-26 4 S 0 1010 16.29 D 5711898 D Common Stock 2010-04-26 4 S 0 773 16.30 D 5711125 D Common Stock 2010-04-26 4 S 0 392 16.32 D 5710733 D Common Stock 2010-04-26 4 S 0 100 16.33 D 5710633 D Common Stock 2010-04-26 4 S 0 300 16.34 D 5710333 D Common Stock 2010-04-26 4 S 0 200 16.35 D 5710133 D Common Stock 2010-04-26 4 S 0 100 16.37 D 5710033 D Common Stock 2010-04-26 4 S 0 300 16.41 D 5709733 D Common Stock 2010-04-26 4 S 0 100 16.455 D 5709633 D Common Stock 2010-04-26 4 S 0 100 16.47 D 5709533 D Common Stock 2010-04-26 4 S 0 200 16.48 D 5709333 D Common Stock 2010-04-26 4 S 0 400 16.49 D 5708933 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) 2010-04-27