Advanced Energy officer plans $263K stock sale

ADVANCED ENERGY INDUSTRIES INC (AEIS) reported that officer Elizabeth K. Vonne filed a Rule 144 notice for a proposed sale of 907 shares of common stock through Morgan Stanley Smith Barney LLC.

Rhea-AI Filing Summary

ADVANCED ENERGY INDUSTRIES INC (AEIS) reported that officer Elizabeth K. Vonne filed a Rule 144 notice for a proposed sale of 907 shares of common stock through Morgan Stanley Smith Barney LLC. The shares were originally acquired as Performance Shares from the issuer on February 20, 2025.

Over the previous three months, Elizabeth K. Vonne sold 908 shares of AEIS common stock, with reported aggregate proceeds of $302,073.44. The planned 907-share sale is listed with an aggregate market value of $263,075.35, and the securities are traded on NASDAQ.

Key Figures

Shares to be sold under Rule 144: 907 shares Aggregate market value of shares to be sold: $263,075.35 Shares sold in past 3 months: 908 shares +2 more

5 metrics

Shares to be sold under Rule 144 907 shares Proposed sale of AEIS common stock for the account of Elizabeth K. Vonne

Aggregate market value of shares to be sold $263,075.35 Market value associated with the 907 AEIS shares covered by the Rule 144 notice

Shares sold in past 3 months 908 shares AEIS common stock sold on August 18, 2026 for the account of Elizabeth K. Vonne

Aggregate proceeds from past 3 months sales $302,073.44 Value of 908 AEIS shares sold on August 18, 2026

Acquisition date of performance shares February 20, 2025 Date the 907 AEIS shares to be sold were acquired as Performance Shares from issuer

Key Terms

Rule 144, Performance Shares, Executive Financial Services

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Performance Shares financial

"Common | 02/20/2025 | Performance Shares | ISSUER"

Performance shares are a type of company stock given to executives or employees that only become theirs if the company meets specific goals, like hitting certain profits or growth targets. They motivate leaders to work toward the company’s success, because their additional shares depend on achieving these results.

Executive Financial Services financial

"Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza"

FAQ

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

What does the Form 144 filing report for ADVANCED ENERGY INDUSTRIES INC (AEIS)?

The filing reports that officer Elizabeth K. Vonne has notified of a proposed sale under Rule 144 of 907 shares of AEIS common stock through Morgan Stanley Smith Barney LLC, with an indicated aggregate market value of $263,075.35.

How many AEIS shares is Elizabeth K. Vonne proposing to sell under this Form 144?

Elizabeth K. Vonne is proposing to sell 907 shares of ADVANCED ENERGY INDUSTRIES INC common stock under this Rule 144 notice, with the shares to be sold through Morgan Stanley Smith Barney LLC Executive Financial Services.

What is the aggregate market value of the AEIS shares to be sold under this Form 144?

The proposed sale covers 907 shares of AEIS common stock with a reported aggregate market value of $263,075.35. This figure reflects the market value associated with the securities listed in the Rule 144 notice.

How many AEIS shares did Elizabeth K. Vonne sell in the past 3 months?

Over the past three months, 908 shares of ADVANCED ENERGY INDUSTRIES INC common stock were sold for the account of Elizabeth K. Vonne, with reported aggregate proceeds of $302,073.44 on a transaction dated August 18, 2026.

How and when were the AEIS shares to be sold under Form 144 originally acquired?

The 907 shares of AEIS common stock covered by the notice were acquired as Performance Shares from the issuer on February 20, 2025, as indicated in the securities acquisition details section of the filing.

On which market are the AEIS shares in this Form 144 traded?

The common stock of ADVANCED ENERGY INDUSTRIES INC referenced in this Form 144 is listed as traded on NASDAQ, as specified in the securities information section of the notice.

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

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Available on EDGAR 08/27/2026 - 04:31 PM EDT Accepted by SEC EDGAR 08/27/2026 - 04:30 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001923149
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	ADVANCED ENERGY INDUSTRIES, INC.
SEC File Number	000-26966
Address of Issuer	1595 WYNKOOP STREET, SUITE 800 DENVER COLORADO 80202
Phone	(970) 407-6626
Name of Person for Whose Account the Securities are To Be Sold	ELIZABETH K VONNE
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	907	263075.35	40050442	08/27/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	02/20/2025	Performance Shares	ISSUER			907	02/20/2025	Not Applicable

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
ELIZABETH K VONNE 1595 WYNKOOP STREET, SUITE 800 DENVER CO 80202	Common	08/18/2026	908	302073.44

144: Remarks and Signature

Remarks
Date of Notice	08/27/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/19/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Elizabeth Karpinski Vonne
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)