X0306 4 2020-03-06 0001097864 ON SEMICONDUCTOR CORP ON 0001558921 GUTMANN BERNARD 5005 EAST MCDOWELL ROAD PHOENIX AZ 85008 1 Exec VP & CFO Common 2020-03-06 4 F 0 8562.0000 17.2800 D 680071.0000 D Common 2020-03-06 4 F 0 25685.0000 17.2800 D 654386.0000 D This disposition transaction represents shares withheld by the Issuer in connection with the vesting on March 6, 2020 of a portion of the Reporting Person's 2017 Restricted Stock Units award granted pursuant to the Issuer's Amended and Restated Stock Incentive Plan and related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person. This disposition transaction represents shares withheld by the Issuer in connection with the vesting on March 6, 2020 of the Reporting Person's 2017 Performance Based Restricted Stock Units award granted pursuant to the Issuer's Amended and Restated Stock Incentive Plan and related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person. /s/ George H. Cave, Attorney-in-Fact 2020-03-10