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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. ☐

(State or other jurisdiction of incorporation)

Written communications pursuant to Rule425 under the Securities Act (17 CFR 230.425)

Check the appropriate box below if the Form8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Pre-commencement communications pursuant to Rule14d-2(b)under the Exchange Act (17 CFR 240.14d-2(b))

Pre-commencement communications pursuant to Rule13e-4(c)under the Exchange Act (17 CFR 240.13e-4(c))

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 thereunto duly authorized.

(Former name or former address if changed since last report)

As previously disclosed in a Current Report on Form 8-K filed with the Securities and Exchange Commission on September 4, 2020, SemiLEDS Corporation (the Company) received a notification letter from The Nasdaq Stock Market LLC (Nasdaq) notifying the Company that the Company had not held an annual meeting of stockholders within twelve months of the end of the Companys fiscal year ended August 31, 2019, as required by Nasdaq Listing Rules 5620(a) and 5810(c)(2)(G) (the Listing Rules).

Date of Report (date of earliest event reported): September 30, 2020

Pursuant to Section13 or 15(d) of the Securities Exchange Act of 1934Soliciting material pursuant to Rule14a-12under the Exchange Act (17 CFR 240.14a-12)(Exact name of registrant as specified in its charter)Registrants telephone number,2020,including area code: +886-37-586788Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (240.12b-2 of this chapter).On September 30,2020,2020 acknowledging that the Company had held an annual meeting of stockholders on September 25,Nasdaq has determined that the Company complies with the Listing Rules.Securitiesregistered pursuant to Section12(b)of the Act:the Company received a notice from Nasdaq dated September 29,and accordingly,