Aehr Test Systems CTO acquires 1,064 shares

AEHR’s CTO activity includes an employee-plan purchase and shares withheld for restricted-stock-unit tax obligations.

Rhea-AI Filing Summary

AEHR TEST SYSTEMS CTO Donald P. Richmond II reported acquiring 1,064 common shares on October 1, 2026, through the company's Amended and Restated 2006 Employee Stock Purchase Plan at $6.6725 per share. On the same date, 76 shares were withheld to satisfy tax-withholding obligations upon vesting of restricted stock units, at a reported $101.6000 per share; the footnote says this does not represent a sale by the reporting person.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider RICHMOND DONALD P. II

Role CTO

Type	Security	Shares	Price	Value
Other	Common Stock F1	1,064	$6.6725	$7K
Tax Withholding	Common Stock F2, F3	76	$101.60	$8K

Holdings After Transaction: Common Stock — 187,555 shares (Direct)

Footnotes (3)

1. F1. These shares have been purchased through the company's Amended and Restated 2006 Employee Stock Purchase Plan, a "tax-conditioned plan" Per Internal Revenue Code Section 423. This purchase is exempt from Section 16 of the Securities Exchange Act of 1934 regarding liabilities arising from six-month short-swing transactions in the Company's securities.
2. F2. Represents shares that were withheld to satisfy tax withholding obligations upon vesting of restricted stock units. This does not represent a sale by the Reporting Person.
3. F3. The amount reported includes shares subject to unvested restricted stock units.

Key Figures

Common shares acquired: 1,064 shares Acquisition price: $6.6725 per share Shares withheld for tax withholding: 76 shares +1 more

4 metrics

Common shares acquired 1,064 shares October 1, 2026, under the Amended and Restated 2006 Employee Stock Purchase Plan

Acquisition price $6.6725 per share Common shares acquired October 1, 2026

Shares withheld for tax withholding 76 shares Upon vesting of restricted stock units on October 1, 2026

Reported per-share price for shares withheld $101.6000 per share Tax-withholding transaction on October 1, 2026

Key Terms

Employee Stock Purchase Plan, tax-conditioned plan, restricted stock units

3 terms

Employee Stock Purchase Plan financial

"purchased through the company's Amended and Restated 2006 Employee Stock Purchase Plan"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

tax-conditioned plan financial

"a "tax-conditioned plan" Per Internal Revenue Code Section 423"

restricted stock units financial

"withheld to satisfy tax withholding obligations upon vesting of restricted stock units"

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.

FAQ

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

How many AEHR shares did Donald P. Richmond II acquire, and at what price?

Donald P. Richmond II, AEHR TEST SYSTEMS' CTO, acquired 1,064 common shares on October 1, 2026, through the company's Amended and Restated 2006 Employee Stock Purchase Plan at $6.6725 per share.

Why were 76 AEHR shares withheld from Donald P. Richmond II?

76 common shares were withheld to satisfy tax-withholding obligations upon vesting of restricted stock units. The footnote says this does not represent a sale by the reporting person; the reported per-share price was $101.6000.

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

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Available on EDGAR 10/02/2026 - 05:52 PM Accepted by SEC EDGAR 10/02/2026 - 05:51 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^*

RICHMOND DONALD P. II

(Last) (First) (Middle)

C/O AEHR TEST SYSTEMS

400 KATO TERRACE

(Street)

FREMONT CALIFORNIA 94539

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
AEHR TEST SYSTEMS [ AEHR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CTO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/01/2026

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	10/01/2026		J		1,064(1)	A	$6.6725	187,631	D
Common Stock	10/01/2026		F		76(2)	D	$101.6	187,555(3)	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. These shares have been purchased through the company's Amended and Restated 2006 Employee Stock Purchase Plan, a "tax-conditioned plan" Per Internal Revenue Code Section 423. This purchase is exempt from Section 16 of the Securities Exchange Act of 1934 regarding liabilities arising from six-month short-swing transactions in the Company's securities.

2. Represents shares that were withheld to satisfy tax withholding obligations upon vesting of restricted stock units. This does not represent a sale by the Reporting Person.

3. The amount reported includes shares subject to unvested restricted stock units.

Remarks:

	/s/Chris Siu, Attorney-in-Fact	10/02/2026
	** 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)