X0306 4 2016-02-05 false 0000051143 INTERNATIONAL BUSINESS MACHINES CORP IBM 0001333712 Rometty Virginia M IBM CORPORATION ONE NEW ORCHARD ROAD ARMONK NY 10504 true true false false Chairman, Pres. and CEO Common Stock 2016-02-05 4 M false 21456.00 91.04 A 31814.1413 D Common Stock 2016-02-05 4 S false 100.00 125.85 D 31714.1413 D Common Stock 2016-02-05 4 S false 200.00 125.88 D 31514.1413 D Common Stock 2016-02-05 4 S false 300.00 125.885 D 31214.1413 D Common Stock 2016-02-05 4 S false 300.00 125.90 D 30914.1413 D Common Stock 2016-02-05 4 S false 400.00 125.91 D 30514.1413 D Common Stock 2016-02-05 4 S false 900.00 125.92 D 29614.1413 D Common Stock 2016-02-05 4 S false 150.00 125.93 D 29464.1413 D Common Stock 2016-02-05 4 S false 400.00 125.94 D 29064.1413 D Common Stock 2016-02-05 4 S false 300.00 125.95 D 28764.1413 D Common Stock 2016-02-05 4 S false 300.00 125.98 D 28464.1413 D Common Stock 2016-02-05 4 S false 100.00 125.99 D 28364.1413 D Common Stock 2016-02-05 4 S false 2625.00 126.00 D 25739.1413 D Common Stock 2016-02-05 4 S false 800.00 126.01 D 24939.1413 D Common Stock 2016-02-05 4 S false 400.00 126.03 D 24539.1413 D Common Stock 2016-02-05 4 S false 800.00 126.04 D 23739.1413 D Common Stock 2016-02-05 4 S false 300.00 126.045 D 23439.1413 D Common Stock 2016-02-05 4 S false 600.00 126.05 D 22839.1413 D Common Stock 2016-02-05 4 S false 100.00 126.07 D 22739.1413 D Common Stock 2016-02-05 4 S false 800.00 126.08 D 21939.1413 D Common Stock 2016-02-05 5 G false E 3254.00 0.00 D 176264.6661 I trust Emp. Stock Option (right to buy) 91.04 2016-02-05 4 M false 21456.00 0.00 D 2010-05-08 2016-05-07 Common Stock 21456.00 0.00 D Phantom Stock Unit 0.00 2016-02-08 4 A false 162.00 0.00 A Common Stock 162.00 15958.00 D The reporting person disclaims beneficial ownership of the securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. This grant vested in four equal annual installments; the last installment vested on the date shown above. Phantom stock units convert to the cash value of the company's common stock on a one-for-one basis. Acquisition of phantom stock units 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 account under such plan. Additional transactions will be shown on a subsequent Form 4. M. Clemens on behalf of V. M. Rometty 2016-02-09