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Table of Contents ( Mark One ) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Delaware ( State or other jurisdiction of incorporation or organization ) For the fiscal year ended January 2 , 2021 Title of each class Common Stock , $ 0.0001 par value 400 West Cesar Chavez , Austin , Texas ( Address of principal executive offices ) or For the transition period from SILICON LABORATORIES INC . ( Exact name of registrant as specified in its charter ) to Commission file number : 000-29823 ( 512 ) 416-8500 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) 74-2793174 ( I.R.S. Employer Identification No. ) Accelerated filer 78701 ( Zip Code ) SLAB Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . þ Yes No Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . □ Yes þ 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 . þ Yes No Name of each exchange on which registered The NASDAQ Stock Market LLC 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 ) . þ Yes No Non - accelerated filer Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See the definitions of " large accelerated filer , ” “ accelerated filer , ” “ smaller reporting company ” and “ emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer þ Smaller reporting company 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 . 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 . Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . □ Yes No The aggregate market value of the voting and non - voting common equity held by non - affiliates computed by reference to the price at which the common equity was last sold as of the last business day of the registrant's most recently completed second fiscal quarter ( July 2 , 2020 ) was approximately $ 4.2 billion ( assuming , for this purpose , that only directors and officers are deemed affiliates ) . There were 43,925,156 shares of the registrant's common stock issued and outstanding as of January 25 , 2021 . DOCUMENTS INCORPORATED BY REFERENCE Portions of the Proxy Statement for the registrant's 2021 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10 - K .