Claudine Adamo, Executive Vice President at Costco Wholesale ($COST), sold about $4.1 million in company shares across three open market transactions over the past year. Her most recent sale occurred on March 9, 2026. These sales rank her 2,219th among 11,678 insiders by total value sold, below the average of $8.6 million per seller and 6.4 transactions. She made no open market purchases in this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 9, 2026 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | S | Common Stock | 730 | $1003.02 | 6,121.1950 | 444,515,000 | 10.66% | 0.00% |
| Oct. 24, 2025 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | S | Common Stock | 2700 | $935.68 | 6,851.1970 | 444,803,000 | 28.27% | 0.00% |
| Oct. 22, 2025 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | F | Common Stock | 122 | $944.68 | 10,134.0570 | 444,803,000 | 1.19% | 0.00% |
| Oct. 22, 2025 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | F | Common Stock | 177 | $944.68 | 9,661.7670 | 444,803,000 | 1.80% | 0.00% |
| Oct. 22, 2025 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | F | Common Stock | 199 | $944.68 | 9,838.4270 | 444,803,000 | 1.98% | 0.00% |
| Oct. 22, 2025 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | F | Common Stock | 97 | $944.68 | 10,037.1170 | 444,803,000 | 0.96% | 0.00% |
| Oct. 22, 2025 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | F | Common Stock | 111 | $944.68 | 9,551.1970 | 444,803,000 | 1.14% | 0.00% |
| Sept. 10, 2025 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | F | Common Stock | 950 | $956.29 | 10,255.8370 | 444,803,000 | 8.47% | 0.00% |
| Sept. 10, 2025 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | A | Common Stock | 4219 | $0.00 | 11,205.5030 | 444,803,000 | 60.39% | 0.00% |
| March 24, 2025 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | S | Common Stock | 900 | $922.56 | 6,986.5030 | 444,891,000 | 11.41% | 0.00% |
| Oct. 22, 2024 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | F | Common Stock | 122 | $893.49 | 8,358.7920 | 444,759,000 | 1.44% | 0.00% |
| Oct. 22, 2024 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | F | Common Stock | 198 | $893.49 | 8,063.1610 | 444,759,000 | 2.40% | 0.00% |
| Oct. 22, 2024 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | F | Common Stock | 97 | $893.49 | 8,261.4500 | 444,759,000 | 1.16% | 0.00% |
| Oct. 22, 2024 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | F | Common Stock | 149 | $893.49 | 8,480.9700 | 444,759,000 | 1.72% | 0.00% |
| Oct. 22, 2024 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | F | Common Stock | 177 | $893.49 | 7,886.5030 | 444,759,000 | 2.19% | 0.00% |
| Sept. 30, 2024 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | S | Common Stock | 3200 | $888.99 | 8,629.5870 | 444,759,000 | 27.05% | 0.00% |
| Sept. 16, 2024 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | F | Common Stock | 1602 | $907.87 | 11,829.5870 | 444,759,000 | 11.93% | 0.00% |
| Sept. 16, 2024 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | A | Common Stock | 6737 | $0.00 | 13,431.7380 | 444,759,000 | 100.64% | 0.00% |
| March 11, 2024 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | S | Common Stock | 1500 | $714.83 | 6,694.6140 | 444,452,000 | 18.30% | 0.00% |
| Jan. 12, 2024 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | A | Common Stock | 66 | $0.00 | 8,194.6140 | 444,452,000 | 0.82% | 0.00% |
| Jan. 12, 2024 | COSTCO WHOLESALE CORP /NEW | $COST | Adamo Claudine | Executive Vice President | A | Common Stock | 31 | $0.00 | 8,158.9740 | 444,452,000 | 0.38% | 0.00% |