Data I/O CFO has 10,345 shares withheld for tax

DATA I/O’s CFO used 10,345 shares from RSU vesting to cover taxes, leaving 89,655 shares held directly.

Rhea-AI Filing Summary

DATA I/O CORP (DAIO) reported that Vice President & CFO Charles Joseph DiBona had 10,345 shares of common stock withheld on September 1, 2026 to pay tax liability arising from RSU vesting. The tax-withholding transaction used a fair market value of $2.885 per share and left him holding 89,655 shares directly. No Rule 10b5-1 trading plan is reported, and the disposition reflects tax settlement rather than an open-market sale.

Insider Trade Summary

Tax Withholding: 10,345 shares

Tax Withholding 1 txn

Insider DiBona Charles Joseph

Role Vice President & CFO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1, F2	10,345	$2.885	$30K

Holdings After Transaction: Common Stock — 89,655 shares (Direct)

Footnotes (2)

1. F1. Shares withheld to cover taxes on vesting issuance.
2. F2. FMV price is the average of high low for the day.

Key Figures

Shares withheld for taxes: 10,345 shares Fair market value price: $2.885 per share Shares held after transaction: 89,655 shares +1 more

4 metrics

Shares withheld for taxes 10,345 shares Shares of DATA I/O CORP common stock withheld on September 1, 2026 to cover RSU-related tax liability

Fair market value price $2.885 per share FMV used to value the 10,345 shares withheld for taxes on September 1, 2026

Shares held after transaction 89,655 shares Direct holdings of DATA I/O CORP common stock by the CFO following the tax-withholding transaction

Code F shares for tax liability 10,345 shares Reported under transaction code F as payment of tax liability by delivering or withholding securities

Key Terms

RSU Vesting, FMV price, tax liability

3 terms

RSU Vesting financial

"Remarks note "RSU Vesting with shares withheld to cover taxes""

RSU vesting is the process by which restricted stock units — a promise by a company to give shares to an employee — become actual, owned shares over time or when certain goals are met. Investors care because vested shares can dilute existing ownership when issued, and the timing of vesting affects when employees can sell shares, which can influence share supply, insider selling patterns, and company incentives.

FMV price financial

"Footnote states "FMV price is the average of high low for the day""

tax liability financial

"Transaction described as payment of tax liability by delivering or withholding securities"

FAQ

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

What insider transaction did DAIO report for its CFO on September 1, 2026?

DATA I/O CORP reported that its CFO, Charles Joseph DiBona, had 10,345 shares of common stock withheld on September 1, 2026 to pay tax liability from RSU vesting, rather than through an open-market sale.

How many DAIO shares were involved in the CFO’s tax-withholding transaction and at what price?

The transaction involved 10,345 shares of DATA I/O CORP common stock, valued at a fair market value of $2.885 per share, with the price described as the average of the high and low trading prices for the day.

How many DAIO shares does the CFO hold after this Form 4 transaction?

After the September 1, 2026 tax-withholding disposition, CFO Charles Joseph DiBona holds 89,655 shares of DATA I/O CORP common stock directly, as reported in the Form 4 filing.

Was the DAIO CFO’s September 1, 2026 Form 4 transaction under a Rule 10b5-1 plan?

No. The filing indicates that the Rule 10b5-1 checkbox is not marked, so no Rule 10b5-1 trading plan is reported for the CFO’s September 1, 2026 tax-withholding transaction.

What is the nature of the DAIO CFO’s Form 4 code F transaction?

The Form 4 describes a code F transaction in which 10,345 shares were withheld to pay tax liability related to RSU vesting, using a fair market value price based on the average of the day’s high and low prices.

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

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Available on EDGAR 09/03/2026 - 03:06 PM EDT Accepted by SEC EDGAR 09/03/2026 - 03:05 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^*

DiBona Charles Joseph

(Last) (First) (Middle)

6645 185TH AVE NE, #100

(Street)

REDMOND WASHINGTON 98052

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
DATA I/O CORP [ DAIO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Vice President & CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/01/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/01/2026		F		10,345(1)	D	$2.885(2)	89,655	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. Shares withheld to cover taxes on vesting issuance.

2. FMV price is the average of high low for the day.

Remarks:

RSU Vesting with shares withheld to cover taxes

	/s/ Charles Joesph DiBona	09/03/2026
	** 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)