AEIS director granted 587 restricted stock units

Donikowski Tina reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Donikowski Tina reported acquisition or exercise transactions in this Form 4 filing.

ADVANCED ENERGY INDUSTRIES INC director Tina Donikowski received an equity award of 587 restricted stock units on May 7, 2026. The grant represents the equity portion of the non-employee directors' annual retainer for Board services under the 2023 Amended and Restated Omnibus Incentive Plan.

The 587 restricted stock units, which correspond to an equal number of shares of common stock, will vest on the one-year anniversary of the grant date, contingent on her continued service as a director. These restricted stock units are not exercisable and do not have an expiration date.

Insider Trade Summary

Grant/Award: 587 shares

Grant/Award 1 txn

Insider Donikowski Tina

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

RSU grant size: 587 restricted stock units Underlying common shares: 587 shares Post-transaction RSU holdings: 587 restricted stock units +2 more

5 metrics

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

Underlying common shares 587 shares Common stock underlying the restricted stock units

Post-transaction RSU holdings 587 restricted stock units Total derivative securities beneficially owned after grant

Transaction date May 7, 2026 Grant date for annual RSU award

Exercise price $0.00 per unit Compensation grant, not exercisable like options

Key Terms

Restricted Stock Units, non-employee directors' retainer, 2023 Amended and Restated Omnibus Incentive Plan, vest, +1 more

5 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.

expiration date financial

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

The expiration date is the deadline after which a financial contract, such as an option or a futures agreement, is no longer valid or can be exercised. It matters to investors because it determines the timeframe during which they can take action or benefit from the contract, similar to how a coupon or a food item has a limited period of usefulness. Once the expiration date passes, the contract loses its value or ability to be used.

FAQ

What insider transaction did AEIS director Tina Donikowski report on this Form 4?

Tina Donikowski reported receiving 587 restricted stock units as compensation for Board service. The award was granted on May 7, 2026 under Advanced Energy Industries’ 2023 Amended and Restated Omnibus Incentive Plan as the equity portion of the non-employee directors’ annual retainer.

Is the AEIS Form 4 transaction a market purchase or sale of shares?

The Form 4 shows a compensation grant, not a market trade. Donikowski received 587 restricted stock units at no cash cost as part of her non-employee director retainer, rather than buying or selling common stock in the open market.

When do Tina Donikowski’s 587 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 Donikowski’s continued service as a director through that date, aligning her equity compensation with ongoing Board duties.

What plan governs the restricted stock unit grant reported for AEIS?

The grant is made under Advanced Energy Industries’ 2023 Amended and Restated Omnibus Incentive Plan. This plan provides the framework for equity-based awards, including the 587 restricted stock units granted as the equity portion of non-employee directors’ annual retainers.

How many AEIS restricted stock units does Tina Donikowski hold after this grant?

Following this transaction, Donikowski holds 587 restricted stock units. This reflects the full amount of the May 7, 2026 annual director grant, as shown by the total derivative securities beneficially owned after the reported award on the Form 4.

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Accepted by SEC EDGAR 05/08/2026 - 12:26 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^*

Donikowski Tina

(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)

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)