| 2009-05-29 | Sale | Geron Corporation GERN | VP, CSO Telomerase Tech | 4,554 0.005% | $6.35 | $28,918 | -6.06% | |
| 2009-05-26 | Sale | Geron Corporation GERN | VP, CSO Telomerase Tech | 20,002 0.0227% | $6.75 | $135,014 | -8.35% | |
| 2009-01-29 | Sale | Geron Corporation GERN | VP and CSO | 60,978 0.065% | $7.09 | $432,383 | -19.18% | |
| 2009-01-05 | Sale | Geron Corporation GERN | VP and CSO | 17,722 0.0206% | $4.90 | $86,838 | +27.8% | |
| 2008-01-04 | Sale | Geron Corporation GERN | VP and CSO | 17,822 0.0237% | $5.34 | $95,169 | -17.52% | |
| 2007-05-18 | Sale | Geron Corporation GERN | VP and CSO | 60,000 0.081% | $9.19 | $551,220 | -29.16% | |
| 2006-01-09 | Sale | Geron Corporation GERN | Chief Scientific Officer | 9,183 0.0141% | $8.56 | $78,606 | -12.02% | |
| 2005-07-20 | Sale | Geron Corporation GERN | Chief Scientific Officer | 25,000 0.0437% | $10.46 | $261,410 | -17.73% | |
| 2005-01-13 | Sale | Geron Corporation GERN | Chief Scientific Officer | 9,929 0.0187% | $8.57 | $85,092 | +2.38% | |
| 2004-04-01 | Sale | Geron Corporation GERN | Chief Scientific Officer | 6,321 0.014% | $9.23 | $58,343 | -22.43% |