| 2003-12-01 | Sale | Geron Corporation GERN | director | 20,625 0.0613% | $12.42 | $256,163 | -37.64% | |
| 2003-09-23 | Sale | Geron Corporation GERN | director | 15,050 0.0383% | $12.50 | $188,125 | -38.42% | |
| 2003-09-10 | Sale | Geron Corporation GERN | director | 3,400 0.0107% | $8.78 | $29,852 | +9.46% |