| 2012-02-14 | Sale | International Business Machines Corporation IBM | Chairman of the Board | 250,000 0.0215% | $191.67 | $47.92M | +2.89% | |
| 2011-08-01 | Sale | International Business Machines Corporation IBM | Chairman of the Board | 300,000 0.0253% | $181.00 | $54.3M | +6.64% | |
| 2010-11-01 | Sale | International Business Machines Corporation IBM | Chairman of the Board | 89,045 0.0071% | $142.43 | $12.68M | +16.22% | |
| 2010-05-28 | Sale | International Business Machines Corporation IBM | Chairman of the Board | 97,750 0.0077% | $125.53 | $12.27M | +16.66% | |
| 2009-11-05 | Sale | International Business Machines Corporation IBM | Chairman of the Board | 79,032 0.0059% | $122.23 | $9.66M | +5.54% | |
| 2008-08-28 | Sale | International Business Machines Corporation IBM | Chairman of the Board | 250,000 0.0185% | $124.79 | $31.2M | -19.06% | |
| 2008-08-21 | Sale | International Business Machines Corporation IBM | Chairman of the Board | 98,876 0.0073% | $122.08 | $12.07M | -18.01% | |
| 2007-11-19 | Sale | International Business Machines Corporation IBM | Chairman of the Board | 85,000 0.0061% | $104.56 | $8.89M | +14.02% | |
| 2007-01-31 | Sale | International Business Machines Corporation IBM | Chairman of the Board | 64,000 0.0022% | $51.86 | $3.32M | +7.77% | |
| 2006-11-01 | Sale | International Business Machines Corporation IBM | Chairman of the Board | 93,228 0.0024% | $36.06 | $3.36M | +12.69% |