144 0001291981 XXXXXXXX LIVE 0000355948 RICHARDSON ELECTRONICS, LTD. 000-12906 40W267 KESLINGER RD PO BOX 393 LAFOX IL 60147 630 208-2200 Diddell Wendy Officer Common Fidelity Brokerage Services LLC

245 Summer Street Boston MA 02110

38993 811834.00 12520251 08/08/2026 NASDAQ Common 07/22/2020 Stock Award ISSUER N 3991 07/22/2020 Compensation Common 07/19/2022 Stock Award ISSUER N 3602 07/19/2022 Compensation Common 07/22/2019 Stock Option Exercise issuer N 4000 07/22/2019 Compensation Common 07/19/2022 Stock Option Exercise issuer N 16000 07/19/2022 Compensation Common 07/19/2023 Stock Option Exercise issuer N 12000 07/19/2023 Compensation N WENDY S. DIDDELL

40W267 KESLINGER ROAD LAFOX IL 60147

RICHARDSON ELECTRONICS LTD 08/04/2026 23901 477975.88 08/07/2026 /s/ Cristina Garcia, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for De Diddell Wendy