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UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K/A

Amendment No. 1

For the fiscal year ended September 27, 2019

OR

For the transition period from to

Commission file number 001-05560

Skyworks Solutions, Inc.

(Exact name of registrant as specified in its charter)

Securities registered pursuant to Section 12(b) of the Act:

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 o No

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. o Yes þ No

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 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 o 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). þ Yes o No

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.

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. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). ☐ Yes þ No

The aggregate market value of the registrant’s common stock held by non-affiliates of the registrant (based on the closing price of the registrant’s common stock as reported on the Nasdaq Global Select Market on the last business day of the registrant’s most recently completed second fiscal quarter March 29, 2019) was approximately $14.2 billion. The number of outstanding shares of the registrant’s common stock, par value $0.25 per share, as of January 20, 2020, was 170,155,181.

EXPLANATORY NOTE

This Amendment No. 1 amends Skyworks Solutions, Inc.’s (“Skyworks” or the “Company”) Annual Report on Form 10-K for the year ended September 27, 2019, which was filed with the Securities and Exchange Commission (“SEC”) on November 14, 2019 (the “Original Filing”). The Company is filing this Amendment No. 1 for the sole purpose of providing the information required in Part III of Form 10-K, as the Company’s 2020 Annual Meeting of Stockholders is scheduled for May 6, 2020, and, accordingly, the Company’s Proxy Statement relating to such Annual Meeting will be filed after the date hereof. Except as described above, this Amendment No. 1 does not amend any other information set forth in the Original Filing, and the Company has not updated disclosures included therein to reflect any subsequent events.

PART III