X0407 4 2023-05-05 0 0000927003 ADVANCED ENERGY INDUSTRIES INC AEIS 0001222896 FOSTER RONALD C 1595 WYNKOOP STREET, SUITE 800 DENVER CO 80202 1 0 0 0 0 Common Stock 12618 D Common Stock 18425 D Common Stock 18425 D Common Stock 0.00 2023-05-05 4 A 0 2257 0.00 A Common Stock 2257 2257 D Represents 2,655 unvested restricted stock units and 9,963 shares of common stock. Shares held by the Ronald C. Foster 2021 Trust, where his spouse serves as trustee and is a beneficiary. Shares held by the Kathryn A. Foster 2020 Spousal Trust, where the reporting person serves as a trustee and is a beneficiary. Represents an annual grant of restricted stock units on May 5, 2023 as the equity portion of non-employee directors' retainer for Board services under the 2023 Omnibus Incentive plan. The units vest on the one-year anniversary of the grant date contingent upon the Director's continued service upon such date. Restricted stock units are not exercisable. Restricted stock units do not have an expiration date. /s/ Elizabeth Vonne - Attorney-in-Fact 2023-05-08