| 2018-10-25 | Sale | Costco Wholesale Corporation COST | Executive VP | 46,000 0.0105% | $226.76 | $10.43M | +8.5% | |
| 2016-03-18 | Sale | Costco Wholesale Corporation COST | Executive VP | 40,000 0.0091% | $153.44 | $6.14M | +2.17% | |
| 2015-01-29 | Sale | Costco Wholesale Corporation COST | Executive VP | 20,000 0.0045% | $139.83 | $2.8M | +8.48% | |
| 2014-10-01 | Sale | Costco Wholesale Corporation COST | Executive VP | 1,200 0.0003% | $125.25 | $150,300 | +18.48% | |
| 2014-09-02 | Sale | Costco Wholesale Corporation COST | Executive VP | 1,200 0.0003% | $121.00 | $145,200 | +19.61% | |
| 2014-08-01 | Sale | Costco Wholesale Corporation COST | Executive VP | 1,200 0.0003% | $117.80 | $141,360 | +21.9% | |
| 2014-07-01 | Sale | Costco Wholesale Corporation COST | Executive VP | 1,200 0.0003% | $115.29 | $138,348 | +23.48% | |
| 2014-06-06 | Sale | Costco Wholesale Corporation COST | Executive VP | 20,000 0.0045% | $117.69 | $2.35M | +18.76% | |
| 2014-06-02 | Sale | Costco Wholesale Corporation COST | Executive VP | 1,200 0.0003% | $115.84 | $139,008 | +21.11% | |
| 2014-05-01 | Sale | Costco Wholesale Corporation COST | Executive VP | 1,200 0.0003% | $115.69 | $138,828 | +15.33% | |
| 2014-04-01 | Sale | Costco Wholesale Corporation COST | Executive VP | 1,200 0.0003% | $112.16 | $134,592 | +13.5% | |
| 2014-03-03 | Sale | Costco Wholesale Corporation COST | Executive VP | 1,200 0.0003% | $116.12 | $139,344 | +5.59% | |
| 2014-02-03 | Sale | Costco Wholesale Corporation COST | Executive VP | 1,200 0.0003% | $112.96 | $135,552 | +8.19% | |
| 2014-01-02 | Sale | Costco Wholesale Corporation COST | Executive VP | 1,200 0.0003% | $118.71 | $142,452 | +0.28% | |
| 2013-12-02 | Sale | Costco Wholesale Corporation COST | Executive VP | 1,200 0.0003% | $124.19 | $149,028 | -4.7% | |
| 2013-11-15 | Sale | Costco Wholesale Corporation COST | Executive VP | 1,200 0.0003% | $123.66 | $148,393 | -5.18% | |
| 2013-03-27 | Sale | Costco Wholesale Corporation COST | Executive VP | 4,000 0.0009% | $106.05 | $424,200 | +8.46% | |
| 2003-05-12 | Sale | Costco Wholesale Corporation COST | Executive VP | 20,000 0.0042% | $36.10 | $722,000 | +0.14% |