144 0001763605 XXXXXXXX LIVE 0001097864 ON SEMICONDUCTOR CORP 001-39317 5701 NORTH PIMA ROAD SCOTTSDALE AZ 85250 6022446600 KEETON SIMON Officer Common Rockefeller Capital Managment

1850 Mt. Diablo Blvd, Suite 300 Walnut Creek CA 94596

19902 2626960.50 391903191 06/03/2026 NASDAQ Common 02/07/2025 Stock Award Issuer N 7373 02/07/2025 Compensation Common 02/11/2025 Stock Award Issuer N 2074 02/11/2025 Compensation Common 02/12/2024 Stock Award Issuer N 1491 02/12/2024 Compensation Common 02/15/2024 Stock Award Issuer N 4525 02/15/2024 Compensation Common 02/20/2024 Stock Award Issuer N 4439 02/20/2024 Compensation N Simon Keeton

5701 N. Pima Road Scottsdale AZ 85250

On Semiconductor Corporation 05/11/2026 31463 3313172.19 Shares sold for the following trust account(s): THE KEETON FAMILY TRUST 06/03/2026 /s/ Heather Virgoe as a duly authorized representative of National Financial Services LLC, as attorney-in-fact for KEETON SIMON