| 2011-06-14 | Sale | Geron Corporation GERN | President, Interim CEO, CFO | 68,010 0.0577% | $4.28 | $291,083 | -50.86% | |
| 2011-05-24 | Sale | Geron Corporation GERN | President, Interim CEO, CFO | 8,924 0.0073% | $4.47 | $39,890 | -53.51% | |
| 2010-06-02 | Sale | Geron Corporation GERN | EVP and CFO | 29,492 0.0293% | $5.43 | $160,142 | -10.35% | |
| 2010-05-24 | Sale | Geron Corporation GERN | EVP and CFO | 7,006 0.0074% | $5.11 | $35,801 | +1.4% | |
| 2009-05-29 | Sale | Geron Corporation GERN | EVP and CFO | 6,832 0.0075% | $6.35 | $43,383 | -6.06% | |
| 2009-05-26 | Sale | Geron Corporation GERN | EVP and CFO | 38,640 0.0439% | $6.75 | $260,820 | -8.35% | |
| 2009-01-05 | Sale | Geron Corporation GERN | EVP and CFO | 21,464 0.025% | $4.90 | $105,174 | +27.8% | |
| 2008-01-04 | Sale | Geron Corporation GERN | EVP and CFO | 22,078 0.0293% | $5.34 | $117,897 | -17.52% | |
| 2007-11-12 | Sale | Geron Corporation GERN | EVP and CFO | 8,000 0.0109% | $7.20 | $57,600 | -35.62% | |
| 2006-01-09 | Sale | Geron Corporation GERN | Executive VP and CFO | 12,183 0.0187% | $8.56 | $104,286 | -12.02% | |
| 2005-07-20 | Sale | Geron Corporation GERN | Executive VP and CFO | 30,000 0.0524% | $10.45 | $313,500 | -17.73% | |
| 2005-01-13 | Sale | Geron Corporation GERN | Executive VP, CFO | 13,804 0.0259% | $8.57 | $118,300 | +2.38% | |
| 2004-04-06 | Sale | Geron Corporation GERN | Sr. VP, Corp Dev and CFO | 6,000 0.0136% | $9.51 | $57,050 | -23.35% | |
| 2003-07-31 | Sale | Geron Corporation GERN | Sr. VP, Corp Dev and CFO | 8,011 0.0241% | $8.20 | $65,690 | +18.94% | |
| 2003-07-30 | Sale | Geron Corporation GERN | Sr. VP, Corp Dev and CFO | 8,000 0.0243% | $8.29 | $66,320 | +18.49% |