Executive Change

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: December 17, 2025 (Date of earliest event reported)     GENCOR INDUSTRIES, INC. (Exact name of registrant as specified in its charter)     5201 North Orange Blossom Trail , Orlando , Florida 32810 (Address of principal executive offices) (Zip Code) (407) 290-6000 (Registrant’s telephone number, including area code)   Delaware   001-11703   59-0933147 (State or other jurisdiction of incorporated or organization)   Commission File Number   (I.R.S. Employer Identification No.)     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 or to be registered pursuant to Section 12(b) of the Act   Title of Each Class   Trading Symbol(s)   Name of Exchange on which registered Common Stock ($.10 Par Value)   GENC   NYSE American LLC 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 5.02(b). Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On December 17, 2025, EJ Elliott who serves as the Executive Chairman of the Company, informed the Board of Directors of Gencor Industries, Inc. (“Gencor” or the “Company”) that he will retire as Gencor’s Executive Chairman, effective December 31, 2025. EJ Elliott founded the Company in 1968 and has been Chairman of the Board since 1968. He served as the Chief Executive Officer of the Company from 1968 to 2016. In connection with EJ Elliott’s retirement, the Board of Directors has appointed Marc Elliott to serve as Gencor’s Chairman effective January 1, 2026. Marc Elliott has served on Gencor’s Board of Directors since 2007 and currently serves as Gencor’s President. A copy of the press release is furnished as Exhibit 99.1 hereto.   Item 9.01 Financial Statements and Exhibits. (d) Exhibits   Exhibit    Description 99.1    Press release issued by Gencor Industries, Inc. on December 23, 2025 104    Cover Page Interactive Data File (embedded within the Inline XBRL document). 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.       GENCOR INDUSTRIES, INC. December 23, 2025     By:   /s/ Eric E. Mellen       Eric E. Mellen       Chief Financial Officer and Treasurer