Results of Operations · Reg FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION   FORM 8-K   CURRENT REPORT   Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934   Date of Report (Date of earliest event reported) : May 14, 2026   Data I/O Corporation (Exact name of registrant as specified in its charter)   Washington   0-10394   91-0864123 (State or other jurisdiction  of incorporation)   (Commission File Number)   (IRS Employer  Identification No.)   6645 185th Ave. N.E. , Suite 100 , Redmond , WA 98052 (Address of principal executive offices, including zip code)    ( 425 ) 881-6444 (Registrant’s telephone number, including area code)    Not Applicable (Former name or former address, if changed since last report)   Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:   ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)     ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)     ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))     ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))   Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).   Emerging growth company   ☐   If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act   ☐         Items reported in this filing: Item 2.02 Results of Operation and Financial Condition. Item 7.01 Regulation FD Disclosure. Item 9.01 Financial Statements and Exhibits.     Item 2.02 Results in Operation and Financial Condition.   On May 14, 2026, Data I/O Corporation (the “Company”) issued a press release announcing First Quarter 2026 results and a copy of the release is being furnished as Exhibit 99.0 in this Current Report on Form 8-K.   The information contained in this Item 2.02 and Exhibit 99.0 attached hereto is being furnished and shall not be deemed filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.   Item 7.01 Regulation FD Disclosure.   On May 14, 2026, the Company issued a press release titled “Data I/O Announces Transformational Acquisition.” A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.   On May 14, 2026, the Company issued a press release titled “Data I/O Announces Significant Direct Investment to Support The NEW Data I/O.” A copy of the press release is attached as Exhibit 99.2 to this Current Report on Form 8-K and is incorporated herein by reference.   The information contained in this Item 7.01 and Exhibit 99.1 and 99.2 attached hereto is being furnished and shall not be deemed filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.   Item 9.01 Financial Statements and Exhibits.   (d) Exhibits   Exhibit No.   Description 99.0   Press Release: Data I/O Reports First Quarter 2026 Results 99.1   Press Release: Data I/O Announces Transformational Acquisition 99.2   Press Release: Data I/O Announces Significant Direct Investment to Support The NEW Data I/O     2     SIGNATURE   Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.     Data I/O Corporation           May 15, 2026 By: /s/ Charles DiBona       Charles DiBona       Chief Financial Officer       3