X0508 4 2026-02-26 false 0000051143 INTERNATIONAL BUSINESS MACHINES CORP IBM 0001433640 KAVANAUGH JAMES J IBM CORPORATION ONE NEW ORCHARD ROAD ARMONK NY 10504 false true false false Sr. VP and CFO false Rst. Stock Unit 0.00 2026-02-26 4 A false 10364.00 0.00 A Common Stock 10364.00 10364.00 D Emp. Stock Option (right to buy) 243.22 2026-02-26 4 A false 41455.00 0.00 A 2027-02-26 2036-02-25 Common Stock 41455.00 41455.00 D Upon lapse of the restrictions, these units are payable in cash or the company's common stock. The restrictions lapse for 2,591 of these units on February 26, 2027, 2,591 of these units on February 26, 2028, 2,591 of these units on February 26, 2029, and 2,591 of these units on February 26, 2030. These derivative securities vest in four equal annual installments, the first vesting being on the date exercisable shown. All expire on the expiration date shown above. L. Mallardi on behalf of J. J. Kavanaugh 2026-02-27