Company Update

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): July 28, 2025 ​ ARGAN, INC. (Exact Name of Registrant as Specified in its Charter)   ​ ​ ​ ​ ​ Delaware   001-31756   13-1947195 (State or Other Jurisdiction of Incorporation)   (Commission File Number)   (IRS Employer Identification No.)   ​ ​ ​ 4075 Wilson Boulevard , Suite 440 , Arlington , Virginia   22203 (Address of Principal Executive Offices)   (Zip Code)   Registrant’s telephone number, including area code: ( 301 ) 315-0027 ​ 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. ☐ ​ ​ ​ ​ ​ ​ Title of Each Class: ​ Trading Symbol(s): ​ Name of Each Exchange on Which Registered: Common Stock, $0.15 Par Value ​ AGX ​ New York Stock Exchange ​ ​ ​ Item 8.01. Other Events. Today, Argan, Inc. (“Argan” or the “Company”) issued a press release announcing that its wholly owned subsidiary, Atlantic Projects Company (“APC”), entered into an engineering, procurement and construction services contract for the Platin Power Station with SSE Thermal, part of the integrated energy group SSE plc. The project, located in County Meath, Ireland, will consist of three Siemens Energy SGT-800 turbines operating in open cycle mode with supporting balance of plant equipment. The project will provide approximately 170 MW of generation capacity to the grid during periods of high demand and supply shortfalls from renewable sources. Planned completion is expected in 2028. The full amount of the contract value will be included in Argan’s consolidated project backlog for the period ending July 31, 2025. A copy of Argan’s press release is attached to this report as Exhibit 99.1 and is incorporated herein by reference. Item 9.01. Financial Statements and Exhibits. (d) Exhibits Exhibit No.    Description 99.1    Press Release issued by Argan on July 28, 2025 104 ​ Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101) ​ 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.       ARGAN, INC. ​ ​ ​ ​ Date: July 28, 2025     By:   /s/ Joshua S. Baugher       Joshua S. Baugher       Senior Vice President, Chief Financial Officer and Treasurer ​ ​