ON: Financial results

Item 2.02. Results of Operation and Financial Condition. On November 2, 2026, ON Semiconductor Corporation announced in a news release its financial performance for the third quarter ended October 2, 2026 and other related material information (the “ Earnings Release ”). A copy of the Earnings Release is attached hereto as Exhibit 99.1 and incorporated herein by reference. The information in Item 2.02 of this Current Report on Form 8-K, including Exhibit 99.1, is being furnished under Item 2.02 and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “ Exchange Act ”), or otherwise subject to liability under that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing, except as shall be expressly set forth by specific reference in such filing. Item 9.01. Financial Statements and Exhibits. (d) Exhibits The below exhibit is furnished as part of this Current Report on Form 8-K. Exhibit No. Description 99.1 News release for ON Semiconductor Corporation, dated November 2, 2026, announcing financial performance for the third quarter ended October 2, 2026 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) SIGNATURES 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. ON SEMICONDUCTOR CORPORATION (Registrant) Date: November 2 , 2026 By: /s/ Thad Trent Thad Trent Executive Vice President and Chief Financial Officer