X0306 4 2020-12-07 0001097864 ON SEMICONDUCTOR CORP ON 0001558882 El-Khoury Hassane 5005 EAST MCDOWELL ROAD PHOENIX AZ 85008 1 1 CEO & President Common 2020-12-07 4 A 0 98120.0000 0.0000 A 98120.0000 D Restricted stock units approved under the Issuer's Amended and Restated Stock Incentive Plan with a grant date of December 7, 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. /s/ Lauren C. Bellerjeau, Attorney-in-Fact 2020-12-09