X0306 4 2015-11-19 false 0000051143 INTERNATIONAL BUSINESS MACHINES CORP IBM 0001502812 Clementi Erich IBM CORPORATION 294 ROUTE 100 SOMERS NY 10589 false true false false Senior Vice President Common Stock 2015-11-19 4 S false 100.00 137.24 D 36498.00 D Common Stock 2015-11-19 4 S false 608.00 137.25 D 35890.00 D Common Stock 2015-11-19 4 S false 1400.00 137.26 D 34490.00 D Common Stock 2015-11-19 4 S false 514.00 137.27 D 33976.00 D Common Stock 2015-11-19 4 S false 9518.00 137.28 D 24458.00 D Common Stock 2015-11-19 4 S false 538.00 137.29 D 23920.00 D Common Stock 2015-11-19 4 S false 305.00 137.30 D 23615.00 D Common Stock 2015-11-19 4 S false 200.00 137.31 D 23415.00 D Common Stock 2015-11-19 4 S false 961.00 137.32 D 22454.00 D Common Stock 2015-11-19 4 S false 1300.00 137.33 D 21154.00 D Common Stock 2015-11-19 4 S false 100.00 137.34 D 21054.00 D Common Stock 2015-11-19 4 S false 200.00 137.35 D 20854.00 D Common Stock 2015-11-19 4 S false 656.00 137.37 D 20198.00 D Phantom Stock Unit 0.00 2015-11-19 4 I false 16848.00 136.74 A Common Stock 16848.00 16848.00 D Phantom stock units ("units") convert to the cash value of the company's common stock on a one-for-one basis. Intra-plan transfer under the IBM Excess 401(k) Plus Plan. Distribution of phantom stock units under the IBM Excess 401(k) Plus Plan is deferred until separation from the company. The reporting person may transfer these phantom stock units into an alternative investment account under such plan. The transactions reported above consist of a disposition of 16,400 shares of Common Stock and an intra-plan transfer under the IBM Excess 401(k) Plus Plan of 16,848 units into the IBM Stock Fund. This results in substantially the same IBM ownership interest as the officer had prior to these transactions. M. Clemens on behalf of E. Clementi 2015-11-20