Advanced Energy officer plans $182K stock sale

An officer of Advanced Energy Industries has filed a Rule 144 notice covering 632 shares of common stock, following prior sales in August 2026.

Rhea-AI Filing Summary

ADVANCED ENERGY INDUSTRIES INC (AEIS) has an officer, Elizabeth K. Vonne, filing a notice under Rule 144 to sell common stock. The notice lists 632 shares of common stock held in an account at Morgan Stanley Smith Barney LLC, with an aggregate market value of $182,104.48 as of September 8, 2026.

The filing also reports that Elizabeth K. Vonne previously sold 907 shares for $263,075.35 on August 27, 2026 and 908 shares for $302,073.44 on August 18, 2026. The securities to be sold are described as restricted stock originally acquired from the issuer.

Key Figures

Shares to be sold under Rule 144: 632 shares Market value of shares to be sold: $182,104.48 Shares sold on August 27, 2026: 907 shares +3 more

6 metrics

Shares to be sold under Rule 144 632 shares Common stock listed in the new notice with Morgan Stanley Smith Barney LLC

Market value of shares to be sold $182,104.48 Aggregate market value of 632 shares as of September 8, 2026

Shares sold on August 27, 2026 907 shares Common stock sold previously during the past three months

Proceeds on August 27, 2026 sale $263,075.35 Aggregate amount received for 907 shares sold on August 27, 2026

Shares sold on August 18, 2026 908 shares Common stock sold previously during the past three months

Proceeds on August 18, 2026 sale $302,073.44 Aggregate amount received for 908 shares sold on August 18, 2026

Key Terms

Rule 144, Restricted Stock, Securities To Be Sold, Securities Sold During The Past 3 Months

4 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.

Restricted Stock financial

"Common | 04/15/2025 | Restricted Stock | ISSUER"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Securities To Be Sold financial

"144: Securities To Be Sold"

Securities Sold During The Past 3 Months financial

"144: Securities Sold During The Past 3 Months"

FAQ

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

The filing states that an officer, Elizabeth K. Vonne, has given notice under Rule 144 to sell 632 shares of common stock, with an aggregate market value of $182,104.48 as of September 8, 2026, from an account at Morgan Stanley Smith Barney LLC.

How many AEIS shares are covered by the new Rule 144 notice?

The notice covers 632 shares of Advanced Energy Industries common stock. The filing lists these shares with an aggregate market value of $182,104.48 as of September 8, 2026.

What prior AEIS stock sales by Elizabeth K. Vonne are reported in this Form 144?

The filing reports two prior sales: 907 shares of common stock sold for $263,075.35 on August 27, 2026, and 908 shares sold for $302,073.44 on August 18, 2026.

What type of AEIS securities are planned to be sold under this Form 144?

The securities are described as restricted stock of Advanced Energy Industries common stock, originally acquired from the issuer. The notice covers 632 shares of this restricted stock.

On which market is the AEIS stock in this Form 144 listed?

The Form 144 identifies the common stock to be sold as listed on the NASDAQ market. The notice relates to 632 shares with an aggregate market value of $182,104.48 as of September 8, 2026.

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Available on EDGAR 09/08/2026 - 04:14 PM Accepted by SEC EDGAR 09/08/2026 - 04:13 PM 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	632	182104.48	40050442	09/08/2026	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	04/15/2025	Restricted Stock	ISSUER			632	04/15/2025	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	08/27/2026	907	263075.35
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	09/08/2026
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)