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: March 3, 2026 (Date of earliest event reported)   The Eastern Company (Exact name of Registrant as specified in its charter)   Connecticut   001-35383   06-0330020 (State or other jurisdiction   (Commission   (IRS Employer of incorporation)    File Number)   identification No.)   3 Enterprise Drive , Suite 408 , Shelton , Connecticut   06484 (Address of principal executive offices)   (Zip Code)   ( 203 ) 729-2255  (Registrant’s telephone number, including area code)   ________________________________________________ (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 (see General Instruction A.2)   ☐ 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, No Par Value EML NASDAQ Global Market   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. ☐         ITEM 2.02 – Results of Operations and Financial Condition   Press Release dated March 3, 2026 announcing the fourth quarter and full year earnings for 2025 is attached hereto.   ITEM 7.01 – Regulation FD Disclosure   On March 3, 2026, The Eastern Company released the fourth quarter and full year earnings of 2025. A copy of the Press Release dated March 3, 2026, announcing the fourth quarter and full year earnings for 2025 is attached hereto.   ITEM 9.01 – Financial Statements and Exhibits   (d) Exhibits   Exhibit No.    Title       99.1   Press Release dated March 3, 2026 announcing the fourth quarter and full year earnings for 2025.       104   Cover Page Interactive Data File (cover page XBRL tags are embedded within the Inline XBRL document)           2     SIGNATURES   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.           The Eastern Company           Date:  March 3, 2026                                        By: /s/Nicholas Vlahos       Nicholas Vlahos Chief Financial Officer       3