Aehr (AEHR) CFO Chris Siu sells 2,070 shares, retains over 75,000

Rhea-AI Filing Summary

Aehr Test Systems CFO Chris Siu reported open-market sales of company common stock. He sold 1,600 shares at an average price of $106.78 per share through an indirect holding by a trust, and 470 shares at $108.00 per share from his direct holdings.

After these transactions, Siu holds 5,706 shares indirectly through a trust and 70,270 shares directly. A footnote states that the reported amounts include shares subject to unvested restricted stock units, meaning some of the remaining position is tied to equity awards that have not yet fully vested.

Insider Trade Summary

Net Seller: 2,070 shares ($221,608)

Net Sell 2 txns

Insider Siu Chris

Role CFO

Sold 2,070 shs ($222K)

Type	Security	Shares	Price	Value
Sale	Common Stock	470	$108.00	$51K
Sale	Common Stock	1,600	$106.78	$171K

Holdings After Transaction: Common Stock — 70,270 shares (Direct, null); Common Stock — 5,706 shares (Indirect, By Trust)

Footnotes (1)

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Key Figures

Indirect shares sold: 1,600 shares Direct shares sold: 470 shares Total shares sold: 2,070 shares +2 more

5 metrics

Indirect shares sold 1,600 shares Open-market sale via trust at $106.78 per share

Direct shares sold 470 shares Open-market sale at $108.00 per share

Total shares sold 2,070 shares Net insider selling across two transactions

Indirect holdings after sale 5,706 shares Shares held via trust following transactions

Direct holdings after sale 70,270 shares Directly held Aehr shares following transactions

Key Terms

open-market sale, indirect ownership, restricted stock units, Common Stock

4 terms

open-market sale financial

"reported open-market sales of company common stock"

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.

indirect ownership financial

"sold 1,600 shares at an average price ... through an indirect holding by a trust"

restricted stock units financial

"reported amounts include 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.

Common Stock financial

"reported open-market sales of company common stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 Insider Transactions: What Each Field Means →

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^*

Siu Chris

(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)
	CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/14/2026

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	05/14/2026		S		470	D	$108	70,270(1)	D
Common Stock	05/14/2026		S		1,600	D	$106.78	5,706	I	By Trust

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.

	/s/ Chris Siu	05/15/2026
	** 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)

FAQ

What insider transaction did Aehr (AEHR) CFO Chris Siu report?

CFO Chris Siu reported selling a total of 2,070 shares of Aehr common stock in open-market transactions. The sales were split between 1,600 indirectly held shares via a trust and 470 directly held shares, at prices around $106.78 and $108.00 per share.

How many Aehr (AEHR) shares did Chris Siu sell indirectly and at what price?

Chris Siu sold 1,600 Aehr shares held indirectly through a trust at an average price of $106.78 per share. These shares are reported as indirectly owned, reflecting trust ownership rather than direct personal registration in his own name.

How many Aehr (AEHR) shares did Chris Siu sell from his direct holdings?

From his direct holdings, Chris Siu sold 470 Aehr common shares at $108.00 per share. These were reported as open-market sales and are separate from the larger indirect sale executed through a trust entity associated with him.

What are Chris Siu’s Aehr (AEHR) holdings after the reported sales?

After the sales, Chris Siu holds 70,270 Aehr shares directly and 5,706 shares indirectly via a trust. A filing footnote notes that these amounts include shares subject to unvested restricted stock units, which are equity awards that have not fully vested.

Do Chris Siu’s reported Aehr (AEHR) holdings include unvested restricted stock units?

Yes. A footnote states the reported share amounts include shares subject to unvested restricted stock units. This means part of Chris Siu’s disclosed holdings represents equity awards that are still vesting rather than fully unrestricted, freely tradable common shares.