AEHR executive sells 5,400 shares in open market

AEHR Test Systems executive Didier Wimmers reported open-market sales of 5,400 shares of common stock.

Rhea-AI Filing Summary

AEHR Test Systems executive Didier Wimmers reported open-market sales of 5,400 shares of common stock. He sold 3,500 shares on April 13, 2026 at an average price of $71.1102 per share and 1,900 shares on April 15, 2026 at an average price of $72.0239.

After these transactions, Wimmers directly holds 10,659 shares of AEHR common stock, and this amount includes shares subject to unvested restricted stock units. All reported transactions were classified as open-market sales.

Insider Trade Summary

Net Seller: 5,400 shares

Net Sell 2 txns

Insider WIMMERS DIDIER

Role Executive VP of R&D

Sold 5,400 shs ($386K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,900	$72.0239	$137K
Sale	Common Stock	3,500	$71.1102	$249K

Holdings After Transaction: Common Stock — 10,659 shares (Direct)

Footnotes (1)

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

Key Figures

Shares sold on April 13, 2026: 3,500 shares Sale price on April 13, 2026: $71.1102 per share Shares sold on April 15, 2026: 1,900 shares +3 more

6 metrics

Shares sold on April 13, 2026 3,500 shares Open-market sale of common stock at $71.1102 per share

Sale price on April 13, 2026 $71.1102 per share Average price for 3,500 AEHR common shares sold

Shares sold on April 15, 2026 1,900 shares Open-market sale of common stock at $72.0239 per share

Sale price on April 15, 2026 $72.0239 per share Average price for 1,900 AEHR common shares sold

Total shares sold 5,400 shares Combined open-market sales on April 13 and April 15, 2026

Shares held after transactions 10,659 shares Direct AEHR common stock holdings after sales, including unvested RSUs

Key Terms

open-market sale, restricted stock units, non-derivative

3 terms

open-market sale financial

"classified as open-market sales of non-derivative common shares"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

restricted stock units financial

"includes shares subject to unvested 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.

non-derivative financial

"open-market sales of non-derivative common stock by executive"

FAQ

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

What insider transactions did AEHR EVP of R&D Didier Wimmers report?

Didier Wimmers reported selling a total of 5,400 AEHR common shares in open-market transactions. He sold 3,500 shares on April 13, 2026 and 1,900 shares on April 15, 2026, with all trades classified as non-derivative sales of common stock.

On what dates did AEHR’s EVP of R&D sell company stock?

Didier Wimmers sold AEHR common stock on April 13, 2026 and April 15, 2026. Both transactions were reported as open-market sales of non-derivative common shares and are detailed in the Form 4 insider filing for AEHR Test Systems.

How many AEHR shares did Didier Wimmers sell and at what prices?

Wimmers sold 3,500 AEHR shares at an average price of $71.1102 on April 13, 2026 and 1,900 shares at an average price of $72.0239 on April 15, 2026, for a combined total of 5,400 common shares sold in the open market.

How many AEHR shares does Didier Wimmers hold after these sales?

After the reported transactions, Wimmers directly holds 10,659 AEHR common shares. The filing notes that this figure includes shares subject to unvested restricted stock units, meaning part of his reported holdings are tied to equity awards that have not yet fully vested.

What type of insider transaction is reported in the AEHR Form 4?

The AEHR Form 4 reports open-market sales of non-derivative common stock by executive Didier Wimmers. Both transactions use code “S,” indicating sales in the open market or private transactions, rather than option exercises, tax withholding, gifts, or derivative-related activity.

Does the AEHR Form 4 mention restricted stock units for Didier Wimmers?

Yes. A footnote explains that the amount of AEHR shares reported as held by Wimmers includes shares subject to unvested restricted stock units. This means his disclosed ownership combines already vested common shares with equity awards that are still in the vesting period.

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

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Accepted by SEC EDGAR 04/15/2026 - 05:05 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).

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)
04/13/2026

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	04/13/2026		S		3,500	D	$71.1102	12,559	D
Common Stock	04/15/2026		S		1,900	D	$72.0239	10,659(1)	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 amount reported includes shares subject to unvested restricted stock units.

Remarks:

	/s/Chris Siu, Attorney-in-Fact	04/15/2026
	** 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)