X0306 4 2016-02-17 false 0000051143 INTERNATIONAL BUSINESS MACHINES CORP IBM 0001433640 KAVANAUGH JAMES J IBM CORPORATION ONE NEW ORCHARD ROAD ARMONK NY 10504 false true false false Senior Vice President Common Stock 2016-02-17 4 M false 1352.00 82.76 A 27709.8121 D Common Stock 2016-02-17 4 S false 552.00 125.68 D 27157.8121 D Common Stock 2016-02-17 4 S false 800.00 125.69 D 26357.8121 D Emp. Stock Option (right to buy) 82.76 2016-02-17 4 M false 1352.00 0.00 D 2009-05-08 2016-05-07 Common Stock 1352.00 0.00 D This grant vested in one installment on the date shown above. M. Clemens on behalf of J. J. Kavanaugh 2016-02-18