8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OFTHE SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): April 22, 2021

SILICON LABORATORIES INC.

(Exact Name of Registrant as Specified in Charter)

Registrant’s telephone number, including area code:

(512) 416-8500

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:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934.

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 Securities Exchange Act of 1934. ¨

Item 5.07 Submission of Matters to a Vote of Security Holders.

On April 22, 2021, Silicon Laboratories held its Annual Meeting of Stockholders. The matters voted upon at the meeting and the results of those votes were as follows:

Proposal 1 – Election of Class II Directors

Proposal 2 – Ratification of the appointment of Ernst &Young LLP as independent registered public accounting firm for the fiscal year ending January 1, 2022

Proposal 3 – Approval, by non-binding vote, of the compensationof the Company’s Named Executive Officers as disclosed in the Company’s Proxy Statement

Proposal 4 – Approvalof the amendments to the 2009 Stock Incentive Plan as disclosed in the Company’s Proxy Statement

Proposal 5 – Approvalof the amendments to the 2009 Employee Stock Purchase Plan as disclosed in the Company’s Proxy Statement

SIGNATURE

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.