| 2016-12-28 | Sale | Costco Wholesale Corporation COST | 1,400 0.0003% | $161.13 | $225,587 | +5.47% | ||
| 2016-12-09 | Sale | Costco Wholesale Corporation COST | 8,000 0.0018% | $158.55 | $1.27M | +5.31% | ||
| 2016-10-26 | Sale | Costco Wholesale Corporation COST | 6,000 0.0014% | $151.10 | $906,590 | +10.74% | ||
| 2015-10-30 | Sale | Costco Wholesale Corporation COST | 7,600 0.0017% | $158.62 | $1.21M | -2.2% | ||
| 2015-10-27 | Sale | Costco Wholesale Corporation COST | 7,476 0.0017% | $157.50 | $1.18M | -1.95% | ||
| 2014-10-23 | Sale | Costco Wholesale Corporation COST | 30,800 0.007% | $131.14 | $4.04M | +14.68% | ||
| 2013-10-25 | Sale | Costco Wholesale Corporation COST | 7,810 0.0018% | $115.95 | $905,570 | +1.4% | ||
| 2013-10-24 | Sale | Costco Wholesale Corporation COST | 5,000 0.0011% | $116.14 | $580,700 | +1.55% | ||
| 2013-10-22 | Sale | Costco Wholesale Corporation COST | 5,000 0.0011% | $117.09 | $585,450 | <0.01% | ||
| 2012-12-26 | Sale | Costco Wholesale Corporation COST | other | 1,615 – | $0 | $0 | +14.17% | |
| 2012-10-26 | Sale | Costco Wholesale Corporation COST | Former Principal Acct Officer | 3,676 0.0008% | $96.72 | $355,528 | +20.72% | |
| 2012-10-24 | Sale | Costco Wholesale Corporation COST | Former Principal Acct Officer | 1,838 0.0004% | $95.80 | $176,073 | +22.21% | |
| 2012-10-17 | Sale | Costco Wholesale Corporation COST | Former Principal Acct Officer | 1,835 0.0004% | $96.48 | $177,040 | +19.56% | |
| 2011-10-17 | Sale | Costco Wholesale Corporation COST | Former Principal Acct Officer | 1,845 0.0004% | $82.35 | $151,936 | +6.63% | |
| 2010-11-08 | Sale | Costco Wholesale Corporation COST | Former Principal Acct Officer | 9,338 0.0016% | $47.92 | $447,495 | +19.46% | |
| 2010-10-28 | Sale | Costco Wholesale Corporation COST | other | 1,838 – | $0 | $0 | +22.07% | |
| 2010-10-21 | Sale | Costco Wholesale Corporation COST | other | 1,815 – | $0 | $0 | +20.53% | |
| 2010-10-20 | Sale | Costco Wholesale Corporation COST | Former Principal Acct Officer | 1,875 0.0004% | $62.77 | $117,698 | +22.2% | |
| 2010-10-15 | Sale | Costco Wholesale Corporation COST | Former Principal Acct Officer | 7,500 0.0012% | $43.79 | $328,425 | +18.57% | |
| 2010-04-23 | Sale | Costco Wholesale Corporation COST | Former Principal Acct Officer | 932 0.0002% | $60.24 | $56,146 | +7.58% |