AEHR exec has 317 shares withheld for taxes

Executive VP of R&D Didier Wimmers had shares withheld for taxes on RSU vesting, with holdings now reported at 12,379 AEHR shares.

Accepted by SEC EDGAR 09/03/2026 - 09:17 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

AEHR TEST SYSTEMS (AEHR) reported that Executive VP of R&D Didier Wimmers had 317 shares of common stock withheld on September 3, 2026 to satisfy tax withholding obligations upon vesting of restricted stock units, which the company notes does not represent a market sale. Following this tax-withholding disposition, Wimmers holds 12,379 shares directly, including shares underlying unvested restricted stock units, and no Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Tax Withholding: 317 shares

Tax Withholding 1 txn

Insider WIMMERS DIDIER

Role Executive VP of R&D

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1, F2	317	$76.27	$24K

Holdings After Transaction: Common Stock — 12,379 shares (Direct)

Holdings Before and After: Common Stock, 12,696 to 12,379 shares (Direct)

Footnotes (2)

1. F1. 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.
2. F2. The amount reported includes shares subject to unvested restricted stock units.

Key Figures

Shares withheld for taxes: 317 shares Reported price per share: $76.27 per share Shares held after transaction: 12,379 shares +1 more

4 metrics

Shares withheld for taxes 317 shares Withheld on September 3, 2026 to satisfy tax withholding obligations on RSU vesting

Reported price per share $76.27 per share Value assigned to AEHR shares withheld for tax obligations on September 3, 2026

Shares held after transaction 12,379 shares Direct AEHR common stock holdings of Didier Wimmers following the September 3, 2026 transaction, including unvested RSUs

Tax-withholding transactions 1 transaction, 317 shares Exercise-price-or-tax-liability transactions summarized in the filing’s transaction summary

Key Terms

restricted stock units, tax withholding obligations, beneficial ownership

3 terms

restricted stock units financial

"upon vesting of restricted stock units. This does not represent"

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.

tax withholding obligations financial

"shares that were withheld to satisfy tax withholding obligations"

beneficial ownership financial

"The amount reported includes shares subject to unvested restricted"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

FAQ

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

What insider transaction did AEHR executive Didier Wimmers report on this Form 4 for AEHR?

Wimmers reported that 317 AEHR shares were withheld on September 3, 2026 to satisfy tax withholding obligations upon vesting of restricted stock units. The disclosure states this does not represent a sale by the reporting person.

How many AEHR shares does Didier Wimmers hold after this reported transaction?

After the reported tax-withholding disposition, Didier Wimmers holds 12,379 AEHR common shares directly. The filing states that this amount includes shares subject to unvested restricted stock units.

Was the AEHR Form 4 transaction by Didier Wimmers part of a Rule 10b5-1 trading plan?

No. The document-level Rule 10b5-1 checkbox is not affirmed, and there is no footnote indicating that the September 3, 2026 transaction was executed under a Rule 10b5-1 or other pre-arranged trading plan.

What price per share is reported for the AEHR shares withheld for taxes on Wimmers’ Form 4?

The Form 4 reports a price of $76.27 per share for the 317 AEHR shares withheld to satisfy tax withholding obligations associated with the vesting of restricted stock units on September 3, 2026.

Does Didier Wimmers’ AEHR Form 4 indicate a market sale of shares?

No. A footnote clarifies that the 317 shares were withheld to satisfy tax withholding obligations upon RSU vesting and that this does not represent a sale by the reporting person into the market.

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

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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^*

WIMMERS DIDIER

(Last) (First) (Middle)

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)
	Executive VP of R&D

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/03/2026

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	09/03/2026		F		317(1)	D	$76.27	12,379(2)	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. 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.

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

Remarks:

	/s/Chris Siu, Attorney-in-Fact	09/03/2026
	** 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)