FORM 10-K (Mark One)☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025or ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from __________ to __________ Commission file number:0-21121 TRANSACT TECHNOLOGIES INC(Exact name of registrant as specified in its charter) 06-1456680 06518(Zip Code) Name of each exchange on which registered NASDAQ Global Market Securities registered pursuant to Section 12(g) of the Act: None Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes☐No☒ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes☐No☒ Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or forsuch shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12months (or for such shorter period that the registrant was required to submit such files). Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company.See thedefinitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. Accelerated filer☐Smaller reporting company☒Emerging growth company☐ Large accelerated filer☐Non-accelerated filer☒ 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 accountingstandards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.☐ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error topreviously issued financial statements.☐ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executiveofficers during the relevant recovery period pursuant to §240.10D-1(b).☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes☐No☒ The aggregate market value of the voting and non-voting common equity held by non-affiliates of the registrant was approximately $32,000,000 based on the last sale price on June 30, 2025. As of February 28, 2026, the number of shares outstanding of the registrant’s common stock, par value $0.01 per share, was 10,239,045. DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant’s Definitive Proxy Statement related to its 2026 Annual Meeting of Stockholders (the “Proxy Statement”) to be filed with the Securities and Exchange Commissionwithin 120 days after the Registrant’s fiscal year end of December 31, 2025 are incorporated by reference into Part III of this Annual Report on Form 10-K. Smaller Reporting Company—Scaled Disclosure Pursuant to Item 10(f) of Regulation S-K promulgated under the Securities Act of 1933, as amended (the “Securities Act”), as indicated herein, we haveelected to comply with certain scaled disclosure requirements applicable to “smaller reporting companies” in this Annual Report on Form 10-K for the yearended December 31, 2025 (this “Form 10-K”). PART I Forward-Looking StatementsCertain statements included in this Form 10-K are forward-looking statements within the meaning of the U.S. federal securities laws, including the Private Securities Litigation Reform Act of 1995. Forward-looking statements are any statements other than statements of historical fact. Forward-lookingstatements represent current views about possible future events and are often identified by the use of forward-looking terminology, such as “may,” “will,”“could,” “expect,” “intend,” “estimate,” “anticipate,” “believe,” “project,” “plan,” “predict,” “design” or “continue” or the negative thereof or othersimilar words.Forward-looking statements are subject to certain risks, uncertainties and assumptions.In the