AEIS CEO sells 50,000 shares under 10b5-1 plan

Advanced Energy Industries President and CEO Stephen Douglas Kelley sold 50,000 shares of common stock in open-market transactions.

Rhea-AI Filing Summary

Advanced Energy Industries President and CEO Stephen Douglas Kelley sold 50,000 shares of common stock in open-market transactions. The sales occurred on March 10, 2026 under a Rule 10b5-1 trading plan adopted on December 5, 2025, at prices ranging from $306.79 to $321.35 per share. Following these transactions, he directly owns 80,376 shares.

Insider Trade Summary 10b5-1

Net Seller: 50,000 shares

Net Sell 13 txns

Insider Kelley Stephen Douglas

Role President and CEO

Sold 50,000 shs ($15.83M)

Type	Security	Shares	Price	Value
Sale	Common Stock	543	$305.48	$166K
Sale	Common Stock	876	$306.87	$269K
Sale	Common Stock	1,112	$306.96	$341K
Sale	Common Stock	1,224	$309.77	$379K
Sale	Common Stock	3,330	$311.88	$1.04M
Sale	Common Stock	3,718	$313.80	$1.17M
Sale	Common Stock	5,678	$314.82	$1.79M
Sale	Common Stock	2,312	$315.88	$730K
Sale	Common Stock	2,309	$317.21	$732K
Sale	Common Stock	7,229	$317.94	$2.30M
Sale	Common Stock	13,278	$319.05	$4.24M
Sale	Common Stock	7,535	$319.90	$2.41M
Sale	Common Stock	856	$321.13	$275K

Holdings After Transaction: Common Stock — 80,376 shares (Direct)

Footnotes (13)

1. F1. The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.
2. F2. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $306.79 to $307.21, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.
3. F3. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $307.89 to $308.00, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.
4. F4. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $309.68 to $310.02, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.
5. F5. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $311.81 to $312.19, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.
6. F6. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $313.15 to $314.09, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.
7. F7. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $314.28 to $315.05, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.
8. F8. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $315.36 to $315.91, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.
9. F9. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $316.56 to $317.50, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.
10. F10. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $317.67 to $318.64, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.
11. F11. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $318.69 to $319.62, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.
12. F12. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $319.74 to $320.41, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.
13. F13. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $320.81 to $321.35, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

FAQ

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

What insider transaction did AEIS CEO Stephen Douglas Kelley report?

Stephen Douglas Kelley reported selling 50,000 AEIS common shares. The President and CEO of Advanced Energy Industries completed multiple open-market sales of common stock on March 10, 2026, as disclosed in a Form 4 insider trading report.

How many AEIS shares does the CEO hold after the reported Form 4 sales?

After the transactions, the CEO holds 80,376 AEIS shares. The final line of the Form 4 non-derivative table shows total shares following the last sale of common stock as 80,376, all reported as directly owned.

At what prices were the 50,000 AEIS shares sold by the CEO?

The AEIS shares were sold at prices between $306.79 and $321.35. Footnotes describe weighted-average sale prices across multiple trades, with transaction price ranges running from $306.79 on the low end to $321.35 on the high end.

Was the AEIS CEO’s 50,000-share sale made under a Rule 10b5-1 plan?

Yes. The CEO’s reported sale was made under a Rule 10b5-1 plan. A footnote states the transactions were executed pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

How many individual sale transactions did the AEIS CEO report on this Form 4?

The Form 4 reports 13 separate sale transactions. The transaction summary shows a sellCount of 13 non-derivative sales, all involving common stock and categorized as open-market or private sale transactions.

Did the AEIS Form 4 include any option exercises or derivative transactions?

No derivative exercises were reported in this Form 4. The derivativeSummary is empty and the transactionSummary lists zero exerciseCount and derivativeTransactionCount, indicating only non-derivative common stock sales were reported.

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

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 03/12/2026 - 06:54 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).

X

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^*

Kelley Stephen Douglas

(Last) (First) (Middle)

1595 WYNKOOP STREET, SUITE 800

(Street)

DENVER CO 80202

(City) (State) (Zip)

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
X	Officer (give title below)		Other (specify below)
	President and CEO

3. Date of Earliest Transaction (Month/Day/Year)
03/10/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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	03/10/2026		S(1)		543	D	$305.48	129,833	D
Common Stock	03/10/2026		S(1)		876	D	$306.87(2)	128,957	D
Common Stock	03/10/2026		S(1)		1,112	D	$306.96(3)	127,845	D
Common Stock	03/10/2026		S(1)		1,224	D	$309.77(4)	126,621	D
Common Stock	03/10/2026		S(1)		3,330	D	$311.88(5)	123,291	D
Common Stock	03/10/2026		S(1)		3,718	D	$313.8(6)	119,573	D
Common Stock	03/10/2026		S(1)		5,678	D	$314.82(7)	113,895	D
Common Stock	03/10/2026		S(1)		2,312	D	$315.88(8)	111,583	D
Common Stock	03/10/2026		S(1)		2,309	D	$317.21(9)	109,274	D
Common Stock	03/10/2026		S(1)		7,229	D	$317.94(10)	102,045	D
Common Stock	03/10/2026		S(1)		13,278	D	$319.05(11)	88,767	D
Common Stock	03/10/2026		S(1)		7,535	D	$319.9(12)	81,232	D
Common Stock	03/10/2026		S(1)		856	D	$321.13(13)	80,376	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

Explanation of Responses:

1. The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

2. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $306.79 to $307.21, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

3. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $307.89 to $308.00, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

4. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $309.68 to $310.02, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

5. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $311.81 to $312.19, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

6. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $313.15 to $314.09, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

7. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $314.28 to $315.05, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

8. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $315.36 to $315.91, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

9. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $316.56 to $317.50, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

10. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $317.67 to $318.64, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

11. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $318.69 to $319.62, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

12. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $319.74 to $320.41, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

13. Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $320.81 to $321.35, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

	/s/ Elizabeth Vonne - Attorney-in-Fact	03/12/2026
	** 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.
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