| 2012-06-15 | Sale | Costco Wholesale Corporation COST | director | 7,621 0.0017% | $90.71 | $691,293 | +16.08% | |
| 2006-09-13 | Costco Wholesale Corporation COST | director | 2,000 0.0004% | $49.55 | $99,100 | +11.75% | ||
| 2005-03-03 | Costco Wholesale Corporation COST | director | 1,000 0.0002% | $45.12 | $45,120 | +2.51% | ||
| 2003-08-13 | Costco Wholesale Corporation COST | director | 1,000 0.0002% | $30.30 | $30,300 | +22.34% |