CFO Chris Siu of AEHR TEST SYSTEMS (AEHR) logs 988-share tax withholding

Rhea-AI Filing Summary

AEHR TEST SYSTEMS reports that CFO Chris Siu had 988 shares of common stock withheld at $72.60 per share to satisfy tax withholding obligations upon vesting of restricted stock units, which the company states is not a sale. After this, he holds 77,824 shares directly, including shares subject to unvested restricted stock units, and 5,706 shares indirectly through a trust.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Siu Chris

Role CFO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	988	$72.60	$72K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 77,824 shares (Direct); Common Stock — 5,706 shares (Indirect, By Trust)

Footnotes (1)

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

Key Figures

Shares withheld for taxes: 988 shares Withholding price per share: $72.60 per share Direct shares after transaction: 77,824 shares +3 more

6 metrics

Shares withheld for taxes 988 shares Shares withheld to satisfy tax withholding obligations upon vesting of restricted stock units

Withholding price per share $72.60 per share Price used for the F-code tax-withholding disposition

Direct shares after transaction 77,824 shares Direct common stock holdings of CFO Chris Siu following the tax withholding

Indirect shares held by trust 5,706 shares Common stock held indirectly with nature of ownership reported as By Trust

Tax withholding transactions 1 transaction Number of F-code tax-withholding dispositions reported in the summary

Net buy/sell shares 0 shares Net buy/sell shares across reported transactions in the transaction summary

Key Terms

restricted stock units, tax withholding obligations, unvested restricted stock units, indirect

4 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 upon vesting"

unvested restricted stock units financial

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

indirect financial

"total_shares_following_transaction 5706.0000, direct_or_indirect I"

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/13/2026 - 05:51 PM Accepted by SEC EDGAR 07/13/2026 - 05:51 PM Learn about SEC filing dates

FAQ

What insider activity did AEHR (AEHR) CFO Chris Siu report?

CFO Chris Siu reported that 988 AEHR common shares were withheld at $72.60 per share to cover tax withholding obligations on vested restricted stock units. The disclosure states this withholding does not represent a sale by the reporting person.

How many AEHR (AEHR) shares does CFO Chris Siu hold after the reported transaction?

Following the tax withholding, CFO Chris Siu directly holds 77,824 AEHR common shares. The reported amount includes shares subject to unvested restricted stock units, and an additional 5,706 shares are held indirectly through a trust.

Was the AEHR (AEHR) CFO’s 988-share Form 4 entry an open-market sale?

No. The filing explains that 988 shares were withheld to satisfy tax withholding obligations upon vesting of restricted stock units. It explicitly states this does not represent a sale by the reporting person.

What does the indirect AEHR (AEHR) holding by trust represent for the CFO?

The filing lists 5,706 AEHR common shares as held indirectly, with ownership described as “By Trust.” This indicates those shares are reported as indirectly owned through a trust associated with CFO Chris Siu.

How many tax-withholding transactions did AEHR (AEHR) report for the CFO?

The summary shows one tax-withholding transaction involving 988 shares of AEHR common stock. This transaction is coded “F,” described as payment of tax liability by delivering securities, and is not treated as an open-market sale.

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)
07/13/2026

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	07/13/2026		F		988(1)	D	$72.6	77,824(2)	D
Common Stock								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. 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/SIU CHRIS	07/13/2026
	** 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)