144 0001690429 XXXXXXXX LIVE 0000355948 RICHARDSON ELECTRONICS, LTD. 000-12906 40W267 Keslinger Road P.O. Box 393 LaFox IL 60147-0393 (630)-208-2200 Ruppert Jens F Officer Common Muriel SIebert & Co., LLC.

18045 Oak Street Omaha NE 68130

38166 648822 12600000 07/28/2026 NASDAQ Common 10/09/2017 Sale of Restricted Stock Award Issuer N 7500 10/09/2017 Equity Award Common 07/22/2019 Sale of Restricted Stock Award Issuer N 10000 07/22/2019 Equity Award Common 07/21/2020 Sale of Restricted Stock Award Issuer N 10000 07/21/2020 Equity Award Common 07/19/2021 Sale of Restricted Stock Award Issuer N 10000 07/19/2021 Equity Award Common 07/21/2025 Sale of Restricted Stock Award Issuer N 666 07/21/2025 Equity Award Y 07/23/2026 Jens F Ruppert