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): July 31, 2025     AMERICAN VANGUARD CORPORATION (Exact name of registrant as specified in its charter)       Delaware   001-13795   95-2588080 (State or other jurisdiction of incorporation)   Commission File Number   (I.R.S. Employer Identification No.) 4695 MacArthur Court Newport Beach , California 92660 (Address of principal executive offices) Registrant’s telephone number: (949) 260-1200     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)) Securities registered pursuant to Section 12(b) of the Act:   Title of each class   Trading Symbol   Exchanges on which registered Common Stock, $.10 par value   AVD   New York Stock Exchange 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 12b02 of the Securities Exchange Act of 1934 (§240.12b02 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 July 31, 2025, American Vanguard Corporation (“Registrant” or the “Company”) issued a press release announcing its unaudited financial results for the three-month period ended June 30, 2025. The full text of the press release is linked hereto as Exhibit 99.1 and is incorporated herein by reference.   Item 7.01 Regulation FD Disclosure. On July 31, 2025, the Company held its previously announced earnings call regarding its unaudited financial results for the three- and six-month periods ended June 30, 2025. A transcript of the earnings call is attached hereto as Exhibit 99.2 and is incorporated herein by reference. The information furnished under Items 2.02, 7.01 and 9.01 of this Current Report on Form 8-K, including Exhibits 99.1 and 99.2 to this Current Report on Form 8-K, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liabilities under that Section, nor shall it be deemed incorporated by reference in any registration statement or other filings of the Company under the Securities Act of 1933, as amended, or into another filing under the Exchange Act, except as shall be set forth by specific reference in such filing.   Item 9.01 Financial Statements and Exhibits. (d) Exhibits   Exhibit 99.1    Press release dated July 31, 2025, of Registrant regarding financial results for the three month period ended June 30, 2025. Exhibit 99.2    Transcript of earnings call held July 31, 2025. 04    Cover Page Interactive Data File (embedded within the Inline XBRL document). SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, American Vanguard Corporation has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.       AMERICAN VANGUARD CORPORATION Date: August 1, 2025           By:   /s/ Timothy J. Donnelly       Timothy J. Donnelly       Chief Information Officer, General       Counsel & Secretary