Results of Operations · Reg FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ​ 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) April 30, 2026 ​ NAPCO SECURITY TECHNOLOGIES, INC. (Exact name of registrant as specified in charter) ​ Delaware   ​ ​ ​ 0-10004   ​ ​ ​ 11-2277818 (State or other jurisdiction of   (Commission File Number)   (IRS Employer Identification No.) incorporation) ​ ​ ​ ​ ​ 333 Bayview Avenue , Amityville , New York 11701 (Address of principal executive offices) ​ Registrant’s telephone number, including area code  ( 631 ) 842-9400 ​ (Former name and former address if changed from 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 (see General Instruction A.2 below): ​ ☐ 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)) ​ Securities registered pursuant to Section 12(b) of the Act: ​ Title of each class   ​ ​ ​ Trading Symbol(s)   ​ ​ ​ Name of each exchange on which registered Common Stock, par value $0.01 per share NSSC Nasdaq Stock Market ​ Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (section 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (section 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 ☐ ​ ​ ​ ​ Item 2.02.    RESULTS OF OPERATIONS AND FINANCIAL CONDITION On May 4, 2026, the registrant issued a press release to report results for the three and nine months ended March 31, 2026. This press release is furnished as Exhibit 99.1. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is furnished pursuant to Item 2.02, and shall not be deemed to be "filed" for the purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liabilities of that section. Item 7.01.    REGULATION FD DISCLOSURE On April 30, 2026, the Company’s Board of Directors declared a cash dividend of $.15 per share payable on July 3, 2026, to stockholders of record on June 12, 2026. Information regarding this declaration is included in the press release furnished as Exhibit 99.1. Item 9.01.    FINANCIAL STATEMENTS AND EXHIBITS (d) Exhibits: ​ ​ ​ ​ 99.1   ​ ​ Press Release issued by Napco Security Technologies, Inc. dated May 4, 2026. 10 4 ​ Cover Page Interactive Data File (formatted as Inline XBRL). ​ ​ 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 thereunder duly authorized. ​   NAPCO SECURITY TECHNOLOGIES, INC.   (Registrant)         Date: May 4, 2026 By: /s/ Kevin S. Buchel     Kevin S. Buchel     President & Chief Operating Officer ​ ​