X0306 4 2020-03-02 0001097864 ON SEMICONDUCTOR CORP ON 0001228890 JACKSON KEITH D 5005 EAST MCDOWELL ROAD PHOENIX AZ 85008 1 1 CEO & Pres. Common 2020-03-02 4 A 0 133123.0000 0.0000 A 3199951.0000 D Common 350000.0000 I By Jackson 5, LP Restricted stock units approved on February 13, 2020 under the Issuer's Amended and Restated Stock Incentive Plan with a grant date of March 2, 2020 and with equal pro rata vesting over a 3-year period beginning on the first anniversary of the grant date. The award may only be settled in shares of the Issuer's common stock upon vesting and was for no consideration other than service as an executive officer of the Issuer. The limited liability company in which the reporting person and his spouse are the sole members serves as the sole general partner of Jackson 5, LP. The reporting person disclaims beneficial ownership of the shares of ON Semiconductor common stock held by Jackson 5, LP, except to the extent of his pecuniary interest therein. /s/ George H. Cave, Attorney-in-Fact 2020-03-04