X0306 4 2019-05-02 0 0001097864 ON SEMICONDUCTOR CORP ON 0001184583 CAVE GEORGE H C O ON SEMICONDUCTOR ATTN M ROGERS 5005 E MCDOWELL RD MDA700 PHOENIX AZ 85008 0 1 0 0 EVP, Gen Cnsl, CC&EO, & Sec Common 2019-05-02 4 S 0 15000 22.8446 D 258214 D This disposition transaction was executed in multiple trades at prices ranging from $22.84 to $22.85. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. Includes an aggregate of 379 shares acquired by the Reporting Person under the Issuer's Employee Stock Purchase Plan for the fiscal quarter ended March 29, 2019. Mark N. Rogers, Attorney-in-Fact 2019-05-06