Page 1

Table of Contents ☐ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 20 - F REGISTRATION STATEMENT PURSUANT TO SECTION 12 ( b ) OR ( g ) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 ☐ * OR SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of event requiring this shell company report : N / A For the transition period from to Commission file number : 000-51380 Silicon Motion Technology Corporation ( Exact name of Registrant as specified in its charter ) Cayman Islands ( Jurisdiction of incorporation or organization ) Unit B , 16 / F , Centre 600 , 82 King Lam St , Cheung Sha Wan , Kowloon , Hong Kong Tel : +852 2307 4768 ( Address of principal executive offices ) Riyadh Lai , Chief Financial Officer Tel : +1 408 519 7200 / Fax : +1 408 519 7101 690 N. McCarthy Blvd. Suite 200 , Milpitas , CA 95035 , USA ( Name , Telephone , E - mail and / or Facsimile number and Address of Company Contact Person ) Securities registered or to be registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) Title of each class Ordinary shares , par value US $ 0.01 per share * American Depositary Shares , each representing four ordinary shares SIMO Name of each exchange on which registered Nasdaq Global Select Market Not for trading , but only in connection with the listing on the Nasdaq Global Select Market of American Depositary Shares , or ADSs , each representing four ordinary shares . Securities registered or to be registered pursuant to Section 12 ( g ) of the Act : None Securities registered or to be registered pursuant to Section 15 ( d ) of the Act : None Indicate the number of outstanding shares of each of the issuer's classes of capital or common stock as of the close of the period covered by the annual report : 138,167,852 ordinary shares as of December 31 , 2020 , US $ 0.01 par value per share . Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes ☑ No □ If this report is an annual or transition report , indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Securities Exchange Act of 1934. Yes □ No × Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Sections 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes ☑ No □ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( $ 232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes > No □ Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , or an emerging growth company . See the definitions of “ large accelerated filer , " " accelerated filer , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer Non - accelerated filer ☑ Accelerated filer ☐ Emerging growth company ☐ ☐ If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP , 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 . Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . † The term " new or revised financial accounting standard " refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5 , 2012 . Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing : U.S. GAAP International Financial Reporting Standards as issued by the International Accounting Standards Board If " Other " has been checked in response to the previous question , indicate by check mark which financial statement item the registrant has elected to follow . If this is an annual report , indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) : Yes □ No Other Item 17 □ Item 18