RICHARDSON ELECTRONICS, LTD. - Director's Dealing 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: RICHARDSON ELECTRONICS LTD/DE (RELL)
CIK: 0000355948
Period of Report: 2010-02-02

Reporting Person: Diddell Wendy (EVP Corporate Development)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-12-02	Common Stock	M	6803	$8.35	Acquired	6803	Direct
2010-12-02	Common Stock	S	6803	$10.96	Disposed	0	Direct
2010-12-02	Common Stock	M	8000	$8.58	Acquired	8000	Direct
2010-12-02	Common Stock	S	8000	$10.96	Disposed	0	Direct
2010-12-02	Common Stock	M	597	$7.24	Acquired	597	Direct
2010-02-02	Common Stock	S	597	$10.96	Disposed	0	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-12-02	Employee Stock Option (Right to Buy)	$8.35	M	6803	Disposed	2015-10-19	Common Stock (6803)	Direct
2010-12-02	Employee Stock Option (Right to Buy)	$8.58	M	8000	Disposed	2016-10-17	Common Stock (8000)	Direct
2010-12-02	Employee Stock Option (Right to Buy)	$7.24	M	597	Disposed	2017-10-09	Common Stock (597)	Direct

F1: The exercise and sale reported in the Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F2: Exercise of employee stock option of which 2,000 shares each vested on October 17, 2007, 2008, 2009, 2010.

F3: Partial exercise of of an employee stock option of which 2,500 shares each vested on October 9, 2008, 2009, 2010.