144 0002005007 XXXXXXXX LIVE 0000051143 International Business Machines Corp 001-02360 One New Orchard Road Armonk NY 10504 9144991900 Robert Thomas Officer Common UBS Financial Services Inc

1000 Harbor Blvd 3rd Floor Weehawken NJ 07086

25000 5758088.48 942134390 08/26/2026 NYSE Common 06/08/2025 restricted stock vesting Issuer N 54 06/08/2025 n/a Common 06/08/2025 restricted stock vesting Issuer N 1650 06/08/2025 n/a Common 02/01/2026 restricted stock vesting Issuer N 21368 02/01/2026 n/a Common 02/18/2026 restricted stock vesting Issuer N 1259 02/18/2026 n/a Common 02/21/2026 restricted stock vesting Issuer N 669 02/21/2026 n/a Y Robert Thomas is CCO at IBM, Robert D Thomas Revocable Trust dtd 2/4/14 is the seller. 08/26/2026 /s/JOSEPH CASSIDY, for UBS Financial Services Inc, as attorney-in-fact for Robert Thomas