X0206 3 2023-03-01 0 0000005981 AMERICAN VANGUARD CORP AVD 0001967727 Naughton Andrew B 4695 MACARTHUR COURT, SUITE 1200 NEWPORT BEACH CA 92660 0 1 0 0 V.P., Director of Technology Common Stock 0 D The reporting person has executed a Power of Attorney dated January 18, 2023 permitting execution of Forms 3, 4 and 5 by two attorneys-in-fact; a copy of that Power of Attorney is filed herewith. /s/ Andrew B. Naughton 2023-03-01