| 2021-01-08 | Sale | Costco Wholesale Corporation COST | Executive VP | 9,015 0.002% | $366.50 | $3.3M | +10.99% | |
| 2019-11-08 | Sale | Costco Wholesale Corporation COST | Executive VP | 3,978 0.0009% | $303.05 | $1.21M | +2.3% | |
| 2019-10-11 | Sale | Costco Wholesale Corporation COST | Executive VP | 5,976 0.0014% | $298.06 | $1.78M | +3.13% | |
| 2019-03-12 | Sale | Costco Wholesale Corporation COST | Executive VP | 16,378 0.0037% | $232.74 | $3.81M | +24.35% | |
| 2018-06-18 | Sale | Costco Wholesale Corporation COST | Executive VP | 11,170 0.0026% | $206.83 | $2.31M | +11.08% | |
| 2018-03-12 | Sale | Costco Wholesale Corporation COST | Executive VP | 23,348 0.0053% | $188.98 | $4.41M | +13.79% | |
| 2018-01-18 | Sale | Costco Wholesale Corporation COST | Executive VP | 13,970 0.0031% | $187.92 | $2.63M | +9.93% | |
| 2017-11-09 | Sale | Costco Wholesale Corporation COST | Executive VP | 8,762 0.002% | $168.16 | $1.47M | +17.49% | |
| 2017-10-20 | Sale | Costco Wholesale Corporation COST | Executive VP | 17,392 0.004% | $160.56 | $2.79M | +22.1% | |
| 2017-01-06 | Sale | Costco Wholesale Corporation COST | Executive VP | 28,378 0.0064% | $161.98 | $4.6M | +4.64% | |
| 2016-12-09 | Sale | Costco Wholesale Corporation COST | Executive VP | 23,430 0.0053% | $158.93 | $3.72M | +5.31% | |
| 2015-12-10 | Sale | Costco Wholesale Corporation COST | Executive VP | 38,190 0.0087% | $162.64 | $6.21M | -5.28% | |
| 2011-12-22 | Sale | Costco Wholesale Corporation COST | Executive VP | 10,000 0.0023% | $83.95 | $839,500 | +10.04% | |
| 2010-04-20 | Sale | Costco Wholesale Corporation COST | Executive VP | 15,000 0.0025% | $43.79 | $656,850 | +8.48% | |
| 2010-01-19 | Sale | Costco Wholesale Corporation COST | Executive VP | 5,174 – | $0 | $0 | +2.32% | |
| 2008-04-22 | Sale | Costco Wholesale Corporation COST | Executive VP | 15,000 0.0017% | $33.75 | $506,250 | -16% | |
| 2006-10-17 | Sale | Costco Wholesale Corporation COST | Executive VP | 75,000 0.0163% | $52.34 | $3.93M | +7.07% | |
| 2006-04-18 | Sale | Costco Wholesale Corporation COST | Executive VP | 60,000 0.0127% | $55.10 | $3.31M | -2.53% | |
| 2005-10-25 | Sale | Costco Wholesale Corporation COST | Executive VP | 40,000 0.0074% | $41.95 | $1.68M | +8.72% | |
| 2004-10-28 | Sale | Costco Wholesale Corporation COST | Executive VP | 12,000 0.0026% | $48.20 | $578,400 | -4.57% |