Paul R. Oldham - 18 Feb 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: 18 Feb 2026
Net transactions value: +$4,858,180
Form type: 4
Filing time: 20 Feb 2026, 18:09:58 UTC
Previous filing: 21 Nov 2025
Next 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	20 Feb 2026	0001421764

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AEIS	Common Stock	Options Exercise	$4,858,180	+15,466	+62%	$314.12	40,258	18 Feb 2026	Direct	F1
transaction	AEIS	Common Stock	Disposed to Issuer		-15,466	-38%		24,792	18 Feb 2026	Direct	F2, 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	Performance Units	Options Exercise	$0	-9,460	-100%	$0.000000	0	20 Feb 2025	Common Stock	0	$0.000000	Direct	F4
transaction	AEIS	Phantom Stock	Award	$0	+15,466	+245%	$0.000000	21,773	18 Feb 2026	Common Stock	15,466		Direct	F5

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

Explanation of Responses:

Id	Content
F1	Represents the total number of shares vested pursuant to the performance unit award issued under the 2023 Long-Term Incentive Plan (the "2023 LTI Plan") and reported voluntarily on 3/3/2023, based on achievement of performance metrics under the 2023 LTI Plan. The shares were approved for a 2/18/2026 release by the Board of Directors.
F2	In connection with the February 18, 2026 vesting of PSUs previously granted on March 1, 2023, the reporting person's receipt of 15,466 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 15,466 shares of phantom stock.
F3	Represents 3,153 shares of unvested restricted stock units and 21,639 shares of common stock.
F4	These performance unit awards were issued under the 2023 LTI Plan at 100% of target and reported voluntarily on 3/3/2023. Following the end of the three-year performance period, the awards vested based on achievement of performance metrics under the 2023 LTI Plan.
F5	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 timing restrictions, the reporting person may transfer some or all of the shares of phantom stock into alternative investments under the terms on the Plan.