AEHR Test Systems (AEHR) CFO reports RSU tax withholding

Rhea-AI Filing Summary

AEHR Test Systems CFO Chris Siu reported a routine tax-related share withholding tied to equity compensation. On the RSU vesting date, 697 shares of common stock were withheld at an implied price of $70.43 per share to satisfy tax withholding obligations, and this was not an open-market sale. Following the withholding, Siu directly owns 70,740 common shares. He also has 7,306 shares held indirectly through a trust, and this amount includes shares subject to unvested restricted stock units.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Siu Chris

Role CFO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	697	$70.43	$49K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 70,740 shares (Direct); Common Stock — 7,306 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

Tax-withheld shares: 697 shares Withholding price: $70.43 per share Direct holdings after transaction: 70,740 shares +2 more

5 metrics

Tax-withheld shares 697 shares Shares withheld to satisfy RSU tax obligations

Withholding price $70.43 per share Implied price for RSU tax withholding

Direct holdings after transaction 70,740 shares CFO direct AEHR common stock ownership after withholding

Indirect holdings by trust 7,306 shares Trust holdings including unvested RSUs

Tax-withholding transactions 1 event, 697 shares Summary tax-withholding count and shares

Key Terms

restricted stock units, tax withholding obligations, unvested restricted stock units, By Trust, +1 more

5 terms

restricted stock units financial

"Represents shares that were withheld to satisfy tax withholding obligations upon vesting of 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.

tax withholding obligations financial

"Represents shares that were withheld to satisfy tax withholding obligations upon vesting of restricted stock units."

unvested restricted stock units financial

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

By Trust financial

"nature_of_ownership": "By Trust""

tax-withholding disposition financial

"transaction_action": "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

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)
04/11/2026

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	04/11/2026		F		697(1)	D	$70.43	70,740(2)	D
Common Stock								7,306	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	04/14/2026
	** 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 CFO Chris Siu report on this Form 4 for AEHR?

Chris Siu reported a tax-withholding disposition related to restricted stock units. The company withheld 697 AEHR shares to cover tax obligations when RSUs vested, rather than Siu selling shares in the open market.

Did the AEHR CFO sell AEHR shares in the open market in this filing?

No, the filing states the 697 AEHR shares were withheld to satisfy tax withholding obligations upon RSU vesting. A footnote clarifies this withholding does not represent a sale by CFO Chris Siu in the market.

How many AEHR shares does CFO Chris Siu own directly after this Form 4 transaction?

After the tax-withholding event, CFO Chris Siu directly owns 70,740 shares of AEHR common stock. This direct ownership figure reflects his position following the 697 shares withheld to cover RSU-related tax obligations.

What indirect AEHR holdings by trust are reported for the CFO in this Form 4?

The Form 4 reports 7,306 AEHR shares held indirectly by a trust associated with CFO Chris Siu. A footnote explains this amount includes shares subject to unvested restricted stock units, so not all of these shares are fully vested yet.

How many AEHR shares were withheld for tax obligations on the CFO’s restricted stock units?

The filing shows 697 AEHR shares were withheld to satisfy tax withholding obligations when restricted stock units vested. The withholding price used was $70.43 per share, and this transaction is coded as a tax-withholding disposition.