AEIS director gains 2,313 shares via RSU vesting

ADVANCED ENERGY INDUSTRIES INC director Tina Donikowski acquired 2,313 shares of Common Stock through the vesting of restricted stock units.

Rhea-AI Filing Summary

ADVANCED ENERGY INDUSTRIES INC director Tina Donikowski acquired 2,313 shares of Common Stock through the vesting of restricted stock units. On May 2, 2026, 2,313 previously granted restricted stock units converted into common stock on a one-for-one basis at no cash exercise price. Following this conversion, she holds 10,561 shares of Common Stock directly. The footnotes explain that the restricted stock units were granted on May 2, 2025, vested one year later, and that such units are not exercisable and have no expiration date.

Insider Trade Summary

2,313 shares exercised/converted

Exercise 2 txns

Insider Donikowski Tina

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	2,313	$0.00	$0.00
Exercise	Common Stock	2,313	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 0 contracts (Direct); Common Stock — 10,561 shares (Direct)

Footnotes (2)

1. F1. On May 2, 2025, the reporting person was granted 2,313 restricted stock units, which vested on the one-year anniversary of the grant date. Restricted stock units convert into common stock on a one-for-one basis.
2. F2. Restricted stock units are not exercisable and do not have an expiration date.

Key Figures

RSUs converted: 2,313 units Shares acquired: 2,313 shares Post-transaction holdings: 10,561 shares +1 more

4 metrics

RSUs converted 2,313 units Restricted stock units converting into Common Stock on May 2, 2026

Shares acquired 2,313 shares Common Stock received from RSU conversion

Post-transaction holdings 10,561 shares Common Stock held directly after the transaction

Exercise price $0.00 per unit Stated price per restricted stock unit converted

Key Terms

restricted stock units, derivative security, Common Stock

3 terms

restricted stock units financial

"the reporting person was granted 2,313 restricted stock units, which vested"

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.

derivative security financial

"transaction_code_description": "Exercise or conversion of derivative security""

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

Common Stock financial

"Restricted stock units convert into common stock on a one-for-one basis"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

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

Tina Donikowski reported the acquisition of 2,313 shares of ADVANCED ENERGY INDUSTRIES INC Common Stock. These shares came from the vesting and conversion of previously granted restricted stock units, not from an open-market purchase, and increased her directly held position.

How many AEIS shares does Tina Donikowski hold after the reported Form 4 transaction?

After the reported transaction, Tina Donikowski holds 10,561 shares of ADVANCED ENERGY INDUSTRIES INC Common Stock directly. This total reflects the addition of 2,313 shares that converted from restricted stock units upon vesting on May 2, 2026.

Were the 2,313 AEIS shares on this Form 4 bought on the open market?

No, the 2,313 shares were not bought on the open market. They resulted from the exercise/conversion of restricted stock units into Common Stock on a one-for-one basis, at a stated price of $0.00 per unit, as part of an equity award.

What do the restricted stock unit footnotes for AEIS explain in this Form 4?

The footnotes explain that on May 2, 2025, 2,313 restricted stock units were granted and vested on the one-year anniversary. They also clarify that restricted stock units convert into common stock one-for-one and are not exercisable securities and do not have an expiration date.

Does this AEIS Form 4 show any sale or disposal of shares by Tina Donikowski?

The Form 4 does not show any sale or disposal of shares. It reports an acquisition via derivative exercise/conversion, where restricted stock units converted into 2,313 shares of Common Stock, increasing her direct ownership to 10,561 shares after the transaction.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/05/2026 - 08:39 PM EDT 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)
05/02/2026

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
Common Stock	05/02/2026		M		2,313	A	(1)	10,561	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
Restricted Stock Units	(1)	05/02/2026		M			2,313	(2)	(2)	Common Stock	2,313	$0	0	D

Explanation of Responses:

1. On May 2, 2025, the reporting person was granted 2,313 restricted stock units, which vested on the one-year anniversary of the grant date. Restricted stock units convert into common stock on a one-for-one basis.

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

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