X0303 4 2010-05-12 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 2010-05-12 4 S 0 200 12.86 D 5441973 D Common Stock 2010-05-12 4 S 0 100 12.87 D 5441873 D Common Stock 2010-05-12 4 S 0 500 12.88 D 5441373 D Common Stock 2010-05-12 4 S 0 500 12.90 D 5440873 D Common Stock 2010-05-12 4 S 0 100 12.96 D 5440773 D Common Stock 2010-05-12 4 S 0 900 12.975 D 5439873 D Common Stock 2010-05-12 4 S 0 1100 12.98 D 5438773 D Common Stock 2010-05-12 4 S 0 100 12.982 D 5438673 D Common Stock 2010-05-12 4 S 0 100 12.9825 D 5438573 D Common Stock 2010-05-12 4 S 0 500 12.985 D 5438073 D Common Stock 2010-05-12 4 S 0 600 12.99 D 5437473 D Common Stock 2010-05-12 4 S 0 2600 13.00 D 5434873 D Common Stock 2010-05-12 4 S 0 1300 13.01 D 5433573 D Common Stock 2010-05-12 4 S 0 100 13.02 D 5433473 D Common Stock 2010-05-12 4 S 0 600 13.03 D 5432873 D Common Stock 2010-05-12 4 S 0 1700 13.035 D 5431173 D Common Stock 2010-05-12 4 S 0 1400 13.04 D 5429773 D Common Stock 2010-05-12 4 S 0 400 13.045 D 5429373 D Common Stock 2010-05-12 4 S 0 1200 13.05 D 5428173 D Common Stock 2010-05-12 4 S 0 1700 13.055 D 5426473 D Common Stock 2010-05-12 4 S 0 100 13.057 D 5426373 D Common Stock 2010-05-12 4 S 0 100 13.0575 D 5426273 D Common Stock 2010-05-12 4 S 0 100 13.059 D 5426173 D Common Stock 2010-05-12 4 S 0 3396 13.06 D 5422777 D Common Stock 2010-05-12 4 S 0 1100 13.065 D 5421677 D Common Stock 2010-05-12 4 S 0 3800 13.07 D 5417877 D Common Stock 2010-05-12 4 S 0 1000 13.075 D 5416877 D Common Stock 2010-05-12 4 S 0 400 13.077 D 5416477 D Common Stock 2010-05-12 4 S 0 200 13.0775 D 5416277 D Common Stock 2010-05-12 4 S 0 2610 13.08 D 5413667 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) 2010-05-13