Paul R. Oldham - 01 Mar 2026 Form 4 Insider Report for ADVANCED ENERGY INDUSTRIES INC (AEIS)

Role: EVP, CFO
Signature: /s/ Elizabeth Vonne - Attorney-in-Fact
Issuer symbol: AEIS
Transactions as of: 01 Mar 2026
Net transactions value: -$973,824
Form type: 4
Filing time: 03 Mar 2026, 18:49:44 UTC
Previous filing: 27 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Oldham Paul R	EVP, CFO	1595 WYNKOOP STREET, SUITE 800, DENVER	/s/ Elizabeth Vonne - Attorney-in-Fact	03 Mar 2026	0001421764

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AEIS	Common Stock	Options Exercise		+3,265	+13%		28,057	01 Mar 2026	Direct	F1
transaction	AEIS	Common Stock	Options Exercise		+3,371	+12%		31,428	01 Mar 2026	Direct	F2
transaction	AEIS	Common Stock	Tax liability	$973,824	-2,902	-9.2%	$335.57	28,526	01 Mar 2026	Direct	F3
transaction	AEIS	Common Stock	Disposed to Issuer		-3,153	-11%		25,373	01 Mar 2026	Direct	F4

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	-3,265	-50%	$0.000000	3,265	01 Mar 2026	Common Stock	3,265		Direct	F1
transaction	AEIS	Restricted Stock Units	Options Exercise	$0	-3,371	-33%	$0.000000	6,741	01 Mar 2026	Common Stock	3,371		Direct	F2
transaction	AEIS	Restricted Stock Units	Award	$0	+4,482		$0.000000	4,482	01 Mar 2026	Common Stock	4,482	$0.000000	Direct	F5
transaction	AEIS	Performance Units	Award	$0	+4,481		$0.000000	4,481	01 Mar 2026	Common Stock	4,481	$0.000000	Direct	F6
transaction	AEIS	Phantom Stock	Award	$0	+3,153	+20%	$0.000000	18,626	01 Mar 2026	Common Stock	3,153		Direct	F7

* 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 9,796 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 10,112 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	Payment of tax liability by withholding securities incident to vesting of RSUs.
F4	In connection with the March 1, 2026 vesting of RSUs previously granted on March 1, 2023 and reported in Table 1, the reporting person's receipt of 3,153 shares of common stock was deferred pursuant to the reporting person's election under the Company's deferred compensation plan (the "Plan"), resulting in the reporting person's receipt of 3,153 shares of phantom stock.
F5	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.
F6	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.
F7	Each share of phantom stock represents a right to receive one share of common stock or the cash value thereof. Shares of phantom stock become payable in accordance with the reporting person's distribution elections made pursuant to the Plan or upon the reporting person's termination of service, death, or disability. Subject to certain timing restrictions, the reporting person may transfer some or all of the shares of phantom stock into alternative investments under the terms of the Plan.