Results of Operations · Reg FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ________________________   FORM 8-K ________________________   CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 7, 2021     RICHARDSON ELECTRONICS, LTD. (Exact name of registrant as specified in charter) _________________________     Delaware (State or other jurisdiction of incorporation) 0-12906 (Commission File Number) 36-2096643 (IRS Employer Identification No.)    40W267 Keslinger Road , P.O. Box 393 , LaFox , Illinois (Address of principal executive offices) 60147-0393 (Zip Code)   Registrant’s telephone number, including area code: ( 630 ) 208-2200 (Former name or former address, if changed since last report.) _________________________ Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))   Securities registered pursuant to Section 12(b) of the Act: Title of Each Class Trading Symbol Name of Each Exchange on Which Registered Common stock, $0.05 Par Value per share RELL NASDAQ Global Select Market   Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐  If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐             Item 2.02.   Results of Operation and Financial Condition. On December 7, 2021, Richardson Electronics, Ltd. (the “Company”) issued a press release announcing preliminary results for its second quarter ended November 27, 2021, in advance of the Company’s previously announced participation at the Sidoti & Company Winter Virtual Micro Cap Investor Conference on December 8 and December 9, 2021.  A copy of the press release is attached hereto as Exhibit 99.1 and incorporated by reference herein.     Item 7.01.   Regulation FD Disclosure . The information set forth in Item 2.02 of this Current Report on Form 8-K (this “Report”) is incorporated into this Item 7.01 by reference. The information contained in Items 2.02 and 7.01 of this Report and Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.   Item 9.01   Financial Statements and Exhibits. (d)   Exhibits   99.1 Press release issued December 7, 2021, furnished herewith     104 Cover Page Interactive Data File (embedded with Inline XBRL document)               SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.       Richardson Electronics, Ltd.       Date: December 7, 2021 By: /s/ Robert J. Ben   Name: Robert J. Ben   Title: Chief Financial Officer and Chief Accounting Officer