X0508 4/A 2025-03-31 2025-04-01 false 0000051143 INTERNATIONAL BUSINESS MACHINES CORP IBM 0001183474 FARR DAVID N C/O SECRETARY'S OFFICE, IBM CORPORATION ONE NEW ORCHARD ROAD ARMONK NY 10504 true false false false false Promised Fee Share 0.00 2025-03-31 4 A false 237.077 248.66 A Common Stock 237.077 21600.077 D Promised Fee Shares under the IBM Board of Directors Deferred Compensation and Equity Award Plan are paid out after retirement in the company's common stock or cash. Deferral of fees into Promised Fee Shares under the terms of the IBM Board of Directors Deferred Compensation and Equity Award Plan. On April 1, 2025, the reporting person filed a Form 4 which, due to administrative error, inadvertently omitted 5.077 Promised Fee Shares from the number of securities acquired on March 31, 2025. The number of Promised Fee Shares acquired and total holdings as of March 31, 2025 have been updated to reflect these Promised Fee Shares. Distribution of Promised Fee Shares under the IBM Board of Directors Deferred Compensation and Equity Award Plan is deferred until retirement. L. Mallardi on behalf of D. N. Farr 2025-12-29