AEIS director receives 587 restricted stock units

DelSanto Anne reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

DelSanto Anne reported acquisition or exercise transactions in this Form 4 filing.

ADVANCED ENERGY INDUSTRIES INC director Anne DelSanto received an equity grant in the form of restricted stock units. On May 7, 2026 she was awarded 587 restricted stock units 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 represent the right to receive 587 shares of common stock and are not exercisable and have no expiration date. They vest on the one-year anniversary of the grant date, contingent on her continued service as a director on that date. Following this grant, she holds 587 restricted stock units directly.

Insider Trade Summary

Grant/Award: 587 shares

Grant/Award 1 txn

Insider DelSanto Anne

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	587	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 587 contracts (Direct)

Footnotes (2)

1. F1. Represents an annual grant of restricted stock units to the reporting person on May 7, 2026 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.
2. F2. Restricted stock units are not exercisable and do not have an expiration date.

Key Figures

RSUs granted: 587 restricted stock units Grant price per unit: $0.0000 per unit Underlying shares: 587 shares of common stock +1 more

4 metrics

RSUs granted 587 restricted stock units Annual non-employee director retainer grant on May 7, 2026

Grant price per unit $0.0000 per unit Reported transaction price for RSU award

Underlying shares 587 shares of common stock Shares underlying the restricted stock units

Holdings after grant 587 restricted stock units Total derivative holdings following this transaction

Key Terms

Restricted Stock Units, non-employee directors' retainer, 2023 Amended and Restated Omnibus Incentive Plan, vest

4 terms

Restricted Stock Units financial

"Represents an annual grant of restricted stock units to the reporting person"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

non-employee directors' retainer financial

"as the equity portion of the non-employee directors' retainer for Board services"

2023 Amended and Restated Omnibus Incentive Plan financial

"for Board services under the 2023 Amended and Restated Omnibus Incentive Plan"

vest financial

"The restricted stock units vest on the one-year anniversary of the grant date"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

FAQ

What insider transaction did AEIS director Anne DelSanto report on this Form 4?

Anne DelSanto reported receiving 587 restricted stock units as an equity grant. The award serves as the equity portion of the non-employee directors' annual retainer for Board service under the company’s 2023 Amended and Restated Omnibus Incentive Plan.

How many AEIS restricted stock units were granted to Anne DelSanto?

She was granted 587 restricted stock units tied to Advanced Energy common stock. These units form part of her compensation for serving as a non-employee director and were reported as a grant, not an open-market purchase or sale of existing shares.

When do Anne DelSanto’s AEIS restricted stock units vest?

The 587 restricted stock units vest on the one-year anniversary of the May 7, 2026 grant date. Vesting is contingent on her continued service as a director on that vesting date, aligning the award with ongoing Board responsibilities.

Are the AEIS restricted stock units reported by Anne DelSanto exercisable?

The restricted stock units are not exercisable and do not have an expiration date. Instead, upon vesting they represent the right to receive an equivalent number of Advanced Energy common shares, functioning as deferred share-based compensation for Board service.

How many AEIS restricted stock units does Anne DelSanto hold after this grant?

After this reported transaction, she directly holds 587 restricted stock units. This reflects the full amount of the May 7, 2026 annual director equity grant, with no additional derivative holdings disclosed in this filing’s derivative summary.

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Accepted by SEC EDGAR 05/08/2026 - 12:24 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^*

DelSanto Anne

(Last) (First) (Middle)

1595 WYNKOOP, 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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/07/2026

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)

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

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
Restricted Stock Units	(1)	05/07/2026		A		587		(2)	(2)	Common Stock	587	$0	587	D

Explanation of Responses:

1. Represents an annual grant of restricted stock units to the reporting person on May 7, 2026 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.

2. Restricted stock units are not exercisable and do not have an expiration date.

	/s/ Elizabeth Vonne - Attorney-in-Fact	05/08/2026
	** 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)