Stephen Douglas Kelley - 01 Mar 2026 Form 4 Insider Report for ADVANCED ENERGY INDUSTRIES INC (AEIS)

Role: President and CEO, Director
Signature: /s/ Elizabeth Vonne - Attorney-in-Fact
Issuer symbol: AEIS
Transactions as of: 01 Mar 2026
Net transactions value: -$4,481,537
Form type: 4
Filing time: 03 Mar 2026, 18:47:37 UTC
Previous filing: 20 Feb 2026
Next filing: 12 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Kelley Stephen Douglas	President and CEO, Director	1595 WYNKOOP STREET, SUITE 800, DENVER	/s/ Elizabeth Vonne - Attorney-in-Fact	03 Mar 2026	0001443674

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AEIS	Common Stock	Options Exercise		+10,449	+8.4%		134,601	01 Mar 2026	Direct	F1
transaction	AEIS	Common Stock	Options Exercise		+9,130	+6.8%		143,731	01 Mar 2026	Direct	F2
transaction	AEIS	Common Stock	Tax liability	$4,481,537	-13,355	-9.3%	$335.57	130,376	01 Mar 2026	Direct	F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	AEIS	Restricted Stock Units	Options Exercise	$0	-10,449	-50%	$0.000000	10,449	01 Mar 2026	Common Stock	10,449		Direct	F1
transaction	AEIS	Restricted Stock Units	Options Exercise	$0	-9,130	-33%	$0.000000	18,258	01 Mar 2026	Common Stock	9,130		Direct	F2
transaction	AEIS	Restricted Stock Units	Award	$0	+11,620		$0.000000	11,620	01 Mar 2026	Common Stock	11,620	$0.000000	Direct	F4
transaction	AEIS	Performance Units	Award	$0	+18,260		$0.000000	18,260	01 Mar 2026	Common Stock	18,260	$0.000000	Direct	F5

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	On March 1, 2024, the reporting person was granted 31,348 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the second installment vested on March 1, 2026. RSUs convert into common stock on a one-for-one basis.
F2	On March 1, 2025, the reporting person was granted 27,388 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the first installment vested on March 1, 2026. RSUs convert into common stock on a one-for-one basis.
F3	Represents 10,950 shares of unvested restricted stock units and 119,426 shares of common stock.
F4	These employee RSUs were issued pursuant to the Company's Amended and Restated 2023 Omnibus Incentive Plan ("LTI Plan") and will vest in three equal installments beginning on the first anniversary of the grant date.
F5	These performance share awards were issued pursuant to the LTI Plan at 100% of target, have a three-year performance period, and will vest in all or in part upon achievement of performance metrics. Any awards that have not been vested and released at the end of the three-year performance period will be canceled.