Advanced Energy CFO amends tax share withholding

ADVANCED ENERGY INDUSTRIES INC executive vice president and CFO Paul R. Oldham filed an amended insider report to correct a prior administrative error.

Rhea-AI Filing Summary

ADVANCED ENERGY INDUSTRIES INC executive vice president and CFO Paul R. Oldham filed an amended insider report to correct a prior administrative error. The amendment clarifies that on February 20, 2025, 3,189 shares of common stock were withheld to satisfy tax liabilities upon vesting of performance stock units, at a reference price of $131.54 per share. After this tax-withholding disposition, his directly held common stock position is reported as 34,598 shares. The amendment explains that earlier Form 4 filings had understated his beneficial ownership by 1,158 shares due to the originally misreported tax-withholding amount.

Insider Trade Summary

Exercise Price or Tax Liability: 3,189 shares

Exercise Price or Tax Liability 1 txn

Insider Oldham Paul R

Role EVP, CFO

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	3,189	$131.54	$419K

Holdings After Transaction: Common Stock — 34,598 shares (Direct)

Footnotes (2)

1. F1. Payment of tax liability by withholding securities incident to vesting of performance stock units.
2. F2. Due to an administrative error, the Form 4 filed on February 21, 2025 inadvertently reflected an incorrect amount of shares withheld for the payment of tax liability. As reflected in this amendment, the correct number of shares withheld on February 20, 2025 was 3,189 shares. As a result, the reporting person's beneficial ownership in Table I, Column 5 was underreported by 1,158 shares in the original February 21, 2025 filing and in the subsequent Forms 4 filed on February 28, 2025, March 4, 2025, March 18, 2025, June 24, 2025, November 21, 2025, February 20, 2026, and March 3, 2026.

FAQ

What did AEIS CFO Paul Oldham report in this amended Form 4?

Paul R. Oldham reported an amended insider transaction reflecting corrected tax-withholding shares from vested performance stock units. The filing updates the number of shares withheld for taxes and adjusts his reported beneficial ownership accordingly to show his true post-vesting holdings.

How many AEIS shares were withheld for Paul Oldham’s tax liability?

The amended filing states that 3,189 shares of Advanced Energy Industries common stock were withheld to cover Paul Oldham’s tax liability. This withholding was tied to the vesting of performance stock units and is not an open-market sale or discretionary trading activity.

What is Paul Oldham’s AEIS share ownership after the corrected transaction?

After the corrected tax-withholding disposition, Paul Oldham is reported to directly own 34,598 shares of Advanced Energy Industries common stock. This figure reflects the updated withholding amount and corrects earlier forms that underreported his beneficial ownership stake.

Why was this Form 4/A amendment necessary for AEIS?

The amendment was necessary because a prior Form 4 inadvertently reported an incorrect number of shares withheld for taxes. Correcting this error increased Paul Oldham’s reported beneficial ownership by 1,158 shares, aligning subsequent filings with the accurate ownership information.

Does this AEIS Form 4/A show the CFO buying or selling shares on the market?

No, the Form 4/A does not show market purchases or sales by the CFO. It records shares withheld by the company to satisfy tax obligations related to vesting performance stock units, which is a non-discretionary, compensation-related disposition rather than an open-market trade.

Which dates and prior AEIS filings were affected by the ownership correction?

The footnote explains that the original error occurred in a Form 4 filed on February 21, 2025. That misreported figure then flowed through several subsequent Forms 4 later in 2025 and early 2026, all of which understated Paul Oldham’s beneficial ownership.

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Accepted by SEC EDGAR 03/19/2026 - 04:21 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Oldham Paul R

(Last) (First) (Middle)

1595 WYNKOOP STREET, SUITE 800

(Street)

DENVER COLORADO 80202

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ADVANCED ENERGY INDUSTRIES INC [ AEIS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
02/20/2025

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)
02/21/2025

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	02/20/2025		F		3,189(1)(2)	D	$131.54	34,598(2)	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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. Payment of tax liability by withholding securities incident to vesting of performance stock units.

2. Due to an administrative error, the Form 4 filed on February 21, 2025 inadvertently reflected an incorrect amount of shares withheld for the payment of tax liability. As reflected in this amendment, the correct number of shares withheld on February 20, 2025 was 3,189 shares. As a result, the reporting person's beneficial ownership in Table I, Column 5 was underreported by 1,158 shares in the original February 21, 2025 filing and in the subsequent Forms 4 filed on February 28, 2025, March 4, 2025, March 18, 2025, June 24, 2025, November 21, 2025, February 20, 2026, and March 3, 2026.

	/s/ Elizabeth Vonne - Attorney-in-Fact	03/19/2026
	** Signature of Reporting Person	Date
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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)