What role does Didier Wimmers hold at AEHR related to this stock grant?

Didier Wimmers serves as Executive Vice President of Research and Development at AEHR TEST SYSTEMS. The reported 2,369-share restricted stock unit grant is a compensation-related equity award tied to his executive role with the company.

AEHR (AEHR) Executive VP of R&D granted 2,369 restricted stock units

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

WIMMERS DIDIER reported acquisition or exercise transactions in this Form 4 filing.

AEHR TEST SYSTEMS Executive VP of R&D Didier Wimmers received an equity award of 2,369 shares of common stock in the form of restricted stock units at no cash cost. Following this grant, he directly holds 12,696 shares, including unvested restricted stock units. One-sixteenth of the total restricted stock units will vest at the end of each three full calendar months after the grant date, as long as he remains employed by the company on those dates.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider WIMMERS DIDIER

Role Executive VP of R&D

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	2,369	$0.00	--

Holdings After Transaction: Common Stock — 12,696 shares (Direct, null)

Footnotes (1)

One-sixteenth (1/16) of the total number of shares subject to the restricted stock unit awards shall vest at the end of each three full calendar months following the date of this action, provided that such recipient is still employed by the corporation on such dates. The amount reported includes shares subject to unvested restricted stock units.

Key Figures

Restricted stock unit grant: 2,369 shares Price per share for grant: $0.00 per share Holdings after transaction: 12,696 shares +1 more

4 metrics

Restricted stock unit grant 2,369 shares Awarded on 2026-07-01 as common stock RSUs

Price per share for grant $0.00 per share Compensation-related equity award, no cash paid

Holdings after transaction 12,696 shares Direct ownership following the RSU grant

Vesting schedule 1/16 every three months Quarterly vesting contingent on continued employment

Key Terms

restricted stock unit, vest, unvested restricted stock units, Executive VP of R&D

4 terms

restricted stock unit financial

"shares subject to the restricted stock unit awards shall vest at the end of each three full calendar months"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

vest financial

"shall vest at the end of each three full calendar months following the date of this action"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

unvested restricted stock units financial

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

Executive VP of R&D financial

"Executive VP of R&D"

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/02/2026 - 07:50 PM Accepted by SEC EDGAR 07/02/2026 - 07:49 PM

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)
07/01/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	07/01/2026		A		2,369⁽¹⁾	A	$0	12,696⁽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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. One-sixteenth (1/16) of the total number of shares subject to the restricted stock unit awards shall vest at the end of each three full calendar months following the date of this action, provided that such recipient is still employed by the corporation on such dates.

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

Remarks:

	/s/Chris Siu, Attorney-in-Fact	07/02/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did AEHR Executive VP of R&D Didier Wimmers report?

Didier Wimmers reported receiving an award of 2,369 shares of AEHR common stock as restricted stock units. This was a compensation-related grant at no cash cost, increasing his direct holdings to 12,696 shares following the transaction.

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

After the reported grant, Didier Wimmers directly holds 12,696 shares of AEHR common stock. This total includes shares subject to unvested restricted stock units, reflecting both already vested shares and restricted stock units that will vest over time.

What is the vesting schedule for Didier Wimmers’ AEHR restricted stock units?

The restricted stock units vest in 16 equal installments. One-sixteenth of the total shares vests at the end of each three full calendar months after the grant date, provided Wimmers remains employed by AEHR TEST SYSTEMS on each applicable vesting date.

Did Didier Wimmers buy or sell AEHR shares in this Form 4 filing?

The filing shows an acquisition through a grant, not a market trade. Wimmers received 2,369 restricted stock units at a stated price of $0.00 per share as part of compensation, so there was no open-market buying or selling activity disclosed.

Are all of Didier Wimmers’ AEHR shares from this grant immediately vested?

No, the award includes unvested restricted stock units. One-sixteenth of the total shares vests every three full calendar months after the grant date, and vesting requires that Wimmers remain employed by AEHR TEST SYSTEMS on each vesting date.