X0508 4 2025-05-15 0001097864 ON SEMICONDUCTOR CORP ON 0001201627 KIDDOO BRUCE E 5701 NORTH PIMA ROAD SCOTTSDALE AZ 85250 1 0 Common 2025-05-15 4 A 0 5054.0000 0.0000 A 20800.0000 D Represents restricted stock granted under the Issuer's Amended and Restated Stock Incentive Plan on May 15, 2025. The stock will vest on the day prior to the Issuer's next Annual Meeting of Stockholders. /s/ Hope M. Spencer, Attorney-in-Fact 2025-05-16