Sec Form 4 Filing - BEARD GRANT H @ ADVANCED ENERGY INDUSTRIES INC - 2025-05-02

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person BEARD GRANT H 2. Issuer Name and Ticker or Trading Symbol ADVANCED ENERGY INDUSTRIES INC [ AEIS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 1595 WYNKOOP STREET, SUITE 800 3. Date of Earliest Transaction (MM/DD/YY) 05/02/2025 (Street) DENVER, CO80202 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 05/03/2025 M 2,616 A 65,766 D Common Stock 05/03/2025 M 157 A 66,120 ( 3 ) D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Units ( 4 ) 05/02/2025 A 3,029 ( 5 ) ( 5 ) Common Stock 3,029 $ 0 3,029 D Restricted Stock Units ( 2 ) 05/02/2025 A 157 ( 5 ) ( 5 ) Common Stock 157 $ 0 157 D Restricted Stock Units ( 6 ) 05/03/2025 M 2,616 ( 5 ) ( 5 ) Common Stock 2,616 $ 0 0 D Restricted Stock Units ( 2 ) 05/03/2025 M 157 ( 5 ) ( 5 ) Common Stock 157 $ 0 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other BEARD GRANT H 1595 WYNKOOP STREET, SUITE 800 DENVER, CO80202 X Signatures /s/ Elizabeth Vonne - Attorney-in-Fact 05/06/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On May 3, 2024, the reporting person was granted 2,616 restricted stock units, which vested on the one-year anniversary of the grant date. Restricted stock units convert into common stock on a one-for-one basis. ( 2 )In April 2024, the compensation committee approved an increase in the annual equity grant of restricted stock units to Mr. Beard for services as chair of the board from $50,000 to $65,000, effective with the May 3, 2024 grant; however, Mr. Beard only received $50,000 of restricted stock units. To true-up his 2024 grant, the compensation committee approved a grant on May 2, 2025, of 157 restricted stock units, which vested one day following the date of grant (the vesting date for the May 2024 awards). Restricted stock units convert to common stock on a one-for-one basis. ( 3 )Amount includes 197 shares acquired through the dividend reinvestment plan since the reporting person's last Form 4. ( 4 )Represents an annual grant of restricted stock units to the reporting person on May 2, 2025 as the equity portion of the non-employee directors' retainer for Board services under the 2023 Amended and Restated Omnibus Incentive Plan. The restricted stock units vest on the one-year anniversary of the grant date contingent upon the reporting person's continued service as director upon such date. ( 5 )Restricted stock units are not exercisable and do not have an expiration date. ( 6 )On May 3, 2024, the reporting person was granted 2,616 restricted stock units, which vested on the one-year anniversary of the grant date. Restricted stock units covert to common stock on a one-for-one basis.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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