X0306 4 2022-02-15 0001097864 ON SEMICONDUCTOR CORP ON 0001763605 KEETON SIMON 5005 EAST MCDOWELL ROAD PHOENIX AZ 85008 1 EVP & GM, PSG Common 2022-02-15 4 A 0 95088.0000 0.0000 A 206953.0000 D Common 2022-02-15 4 A 0 23176.0000 0.0000 A 230129.0000 D Common 2022-02-15 4 A 0 1190.0000 0.0000 A 231319.0000 D Common 2022-02-15 4 F 0 531.0000 62.2400 D 230788.0000 D Common 2022-02-15 4 F 0 10303.0000 62.2400 D 220485.0000 D Common 2022-02-15 4 F 0 42269.0000 62.2400 D 178216.0000 D Represents performance-based restricted stock units, granted under the Issuer's Amended and Restated Stock Incentive Plan on March 2, 2020, for which the Reporting Person has satisfied the applicable performance conditions. The award was for no consideration other than service as an officer of the Issuer. Represents performance-based restricted stock units, granted under the Issuer's Amended and Restated Stock Incentive Plan on February 12, 2021, for which the Reporting Person has satisfied the applicable performance conditions. The award was for no consideration other than service as an officer of the Issuer. Represents performance-based restricted stock units, granted under the Issuer's Amended and Restated Stock Incentive Plan on July 1, 2021, for which the Reporting Person has satisfied the applicable performance conditions. The award was for no consideration other than service as an officer of the Issuer. This transaction represents shares withheld by the Issuer in connection with the vesting of certain performance-based restricted stock units granted to the Reporting Person on July 1, 2021 pursuant to the Issuer's Amended and Restated Stock Incentive Plan and the 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 transaction represents shares withheld by the Issuer in connection with the vesting of certain performance-based restricted stock units granted to the Reporting Person on February 12, 2021 pursuant to the Issuer's Amended and Restated Stock Incentive Plan and the 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 transaction represents shares withheld by the Issuer in connection with the vesting of certain performance-based restricted stock units granted to the Reporting Person on March 2, 2020 pursuant to the Issuer's Amended and Restated Stock Incentive Plan and the 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/ Lauren C. Bellerjeau, Attorney-in-Fact 2022-02-17