AEHR Test Systems (AEHR) exec withholds 364 shares for taxes

Rhea-AI Filing Summary

AEHR Test Systems Executive VP of R&D Didier Wimmers reported a tax-related share withholding tied to restricted stock units. On March 3, 2026, 364 shares of common stock were withheld at $41.64 per share to cover tax obligations, not as an open-market sale. Following this, he held 14,186 shares, which the disclosure notes includes unvested restricted stock units.

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

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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 CA 94539

(City) (State) (Zip)

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

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

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	03/03/2026		F		364(1)	D	$41.64	14,186(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	03/04/2026
	** 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).
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FAQ

What did AEHR executive Didier Wimmers report in this Form 4 filing for AEHR?

Didier Wimmers, Executive VP of R&D at AEHR Test Systems, reported a tax-withholding disposition of common stock. 364 shares were withheld to satisfy tax obligations from vesting restricted stock units, rather than sold in the open market.

How many AEHR shares were withheld for taxes in Didier Wimmers’ transaction?

The filing shows that 364 shares of AEHR common stock were withheld. These shares covered tax withholding obligations triggered when Wimmers’ restricted stock units vested, and the footnote clarifies this was not a discretionary sale by the executive.

At what price were AEHR shares valued for the tax-withholding disposition?

The withheld AEHR shares were valued at $41.64 per share. This price is used to calculate the value of the 364 shares applied toward satisfying Didier Wimmers’ tax obligations upon vesting of his restricted stock units.

How many AEHR shares does Didier Wimmers hold after this Form 4 transaction?

After the tax-withholding disposition, Didier Wimmers is reported to hold 14,186 shares of AEHR common stock. A footnote explains that this reported amount includes shares subject to unvested restricted stock units, not just fully vested shares.

Was the AEHR insider transaction by Didier Wimmers an open-market sale of shares?

No, the transaction was not an open-market sale. The filing specifies that the 364 shares were withheld solely to satisfy tax withholding obligations upon restricted stock units vesting, and explicitly states this does not represent a sale by the reporting person.

What does transaction code F mean in the AEHR Form 4 for Didier Wimmers?

Transaction code F represents a payment of tax liability by delivering securities. In this AEHR Form 4, it reflects that shares were withheld from Didier Wimmers’ vested restricted stock units to cover taxes, rather than sold for investment or trading purposes.