Company: AVD
Filing Date: 2025-05-12
Form Type: NT 10-Q
Source: 0001193125-25-117790
Chunk: 0

Company: AMERICAN VANGUARD CORP
Filing Date: 2025-05-12
Form: NT 10-Q
Chunk 0
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 Report on Form 10-K for the                                              
 fiscal year ended December 31, 2024                                                                                                                                                                                |     |            |     |                   |
| (3) |     | Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or 
 portion thereof? ☐ Yes ☒ No                                                                                                                                                                                        |     |            |     |                   |
|     |     | If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.                       |     |            |     |                   |

Forward-Looking Statements The Company’s statements included in this Form 12b-25 includeforward-looking statements as defined in the Private Securities Litigation Reform Act of 1995, and actual events may differ materially from those contemplated by these forward-looking statements. These forward-looking statements are subject to certain risks and uncertainties, including the inability of the Company to complete the work necessary in order to file the 2024 Form 10-K inthe time frame that is anticipated. The Company undertakes no obligation to revise or update any forward-looking statements to reflect actual events or circumstances after the date hereof. American Vanguard Corporation has caused this notification to be signed on its behalf by the undersigned hereunto duly authorized.

| May 12, 2025 |     | By |     | /s/ Timothy J. Donnelly          |
|:-------------|:----|:---|:----|:---------------------------------|
|              |     |    |     | Timothy J. Donnelly              |
|              |     |    |     | CIO, General Counsel & Secretary |

INSTRUCTION: The form may be signed by an executive officer of the registrant or by any other duly authorized representative. The name and title of the person signing the form shall be typed or printed beneath the signature. If the statement is signed on behalf of the registrant by an authorized representative (other than an executive officer), evidence of the representative’s authority to sign on behalf of the registrant shall be filed with the form.

| ATTENTION                                                                                                   
 Intentional misstatements or omissions of fact constitute Federal Criminal Violations (See 18 U.S.C. 1001). |