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

17492 233518.00 12085774 08/04/2023 NASDAQ Common 10/09/2018 Stock Option Exercise Issuer N 6666 10/09/2018 cash/check Common 10/09/2019 Stock Option Exercise Issuer N 3334 10/09/2018 Cash/Check Common 08/20/2021 Stock Option Exercise Issuer N 3602 08/20/2021 Cash/Check Common 07/19/2022 Stock Option Exercise Issuer N 3890 07/19/2022 Cash/Check Y 08/04/2023 /s/ Christian Nasser as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Wendy Diddell