Costco Wholesale Corporation
COSTLast close · Oct 16, 2026989.11+11.10 (+1.13%)
Market cap$438.3B
Between Oct 22, 2025 and Oct 13, 2026, Costco (COST) insiders filed 40 Form 4 transactions: 13 sales worth $14.6M in total and no open-market purchase. The largest seller was Wilcox William Richard, $2.2M. 27 other filings were grants, exercises or gifts, which say nothing about buying or selling.
40
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13
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Form 4 transactions
| Date | Insider | Title | Code | Plan | Shares | Price | Value |
|---|---|---|---|---|---|---|---|
| 2026-10-13 | Wilcox William Richard | Executive Vice President | S | 1,100 | 958.21 | $1.1M | |
| 2026-09-29 | Frates Caton | Sr. Executive Vice President | S | 801 | 915.93 | $733,328.4 | |
| 2026-09-29 | Adamo Claudine | Executive Vice President | S | 2,200 | 915.93 | $2.0M | |
| 2026-09-10 | Wilcox William Richard | Executive Vice President | A | 4,129 | 0.00 | $0 | |
| 2026-09-10 | Wilcox William Richard | Executive Vice President | F | 1,935 | 902.38 | $1.7M | |
| 2026-09-10 | Rubanenko Yoram | Executive Vice President | A | 4,129 | 0.00 | $0 | |
| 2026-09-10 | Rubanenko Yoram | Executive Vice President | F | 1,696 | 902.38 | $1.5M | |
| 2026-09-10 | Riel Pierre | Executive Vice President | A | 4,552 | 0.00 | $0 | |
| 2026-09-10 | Riel Pierre | Executive Vice President | F | 1,562 | 902.38 | $1.4M | |
| 2026-09-10 | Klauer James C | Executive Vice President | A | 4,129 | 0.00 | $0 | |
| 2026-09-10 | Klauer James C | Executive Vice President | F | 936 | 902.38 | $844,731.5 | |
| 2026-09-10 | Jones Teresa A. | Executive Vice President | A | 4,129 | 0.00 | $0 | |
| 2026-09-10 | Jones Teresa A. | Executive Vice President | F | 1,459 | 902.38 | $1.3M | |
| 2026-09-10 | Frates Caton | Executive Vice President | A | 4,552 | 0.00 | $0 | |
| 2026-09-10 | Frates Caton | Executive Vice President | F | 1,654 | 902.38 | $1.5M | |
| 2026-09-10 | Adamo Claudine | Executive Vice President | F | 917 | 902.38 | $827,198.2 | |
| 2026-09-10 | Adamo Claudine | Executive Vice President | A | 4,129 | 0.00 | $0 | |
| 2026-07-10 | RAIKES JEFFREY S | Director | G | 5,249 | 0.00 | $0 | |
| 2026-06-23 | DENMAN KENNETH D | Director | S | 885 | 957.45 | $847,345.5 | |
| 2026-04-01 | Frates Caton | Executive Vice President | S | 700 | 993.00 | $695,100 | |
| 2026-03-12 | George Sarah Catherine | Executive Vice President | I | 642 | 991.21 | $636,482.8 | |
| 2026-03-11 | MILLERCHIP GARY | Executive Vice President | F | 1,154 | 992.23 | $1.1M | |
| 2026-03-09 | Adamo Claudine | Executive Vice President | S | 730 | 1,003.02 | $732,205.3 | |
| 2026-01-27 | RAIKES JEFFREY S | Director | G | 5,115 | 0.00 | $0 | |
| 2026-01-27 | Jones Teresa A. | Executive Vice President | G | 300 | 0.00 | $0 | |
| 2026-01-21 | Jones Teresa A. | Executive Vice President | S | 850 | 986.26 | $838,318.2 | |
| 2026-01-16 | DECKER SUSAN L | Director | S | 458 | 955.00 | $437,390 | |
| 2026-01-16 | Raimondo Gina Marie | Director | A | 215 | 0.00 | $0 | |
| 2026-01-14 | Klauer James C | Executive Vice President | S | 1,500 | 939.00 | $1.4M | |
| 2026-01-09 | Miller Russell D | Sr. Executive Vice President | S | 1,500 | 916.32 | $1.4M | |
| 2025-12-29 | POLIT JAVIER | Executive Vice President | S | 2,049 | 867.21 | $1.8M | |
| 2025-12-30 | POLIT JAVIER | Executive Vice President | S | 558 | 862.90 | $481,758.6 | |
| 2025-12-19 | DENMAN KENNETH D | Director | G | 325 | 0.00 | $0 | |
| 2025-12-15 | DECKER SUSAN L | Director | G | 2,827 | 0.00 | $0 | |
| 2025-11-10 | RAIKES JEFFREY S | Director | G | 4,120 | 0.00 | $0 | |
| 2025-11-07 | Wilcox William Richard | Executive Vice President | S | 2,400 | 930.13 | $2.2M | |
| 2025-10-22 | Barbre Tiffany Marie | Other | F | 114 | 944.68 | $107,249.5 | |
| 2025-10-22 | Barbre Tiffany Marie | Other | F | 90 | 944.68 | $85,238.5 | |
| 2025-10-22 | Barbre Tiffany Marie | Other | F | 119 | 944.68 | $112,001.3 | |
| 2025-10-22 | Barbre Tiffany Marie | Other | A | 2,118 | 0.00 | $0 |
Codes are the SEC's: P open-market purchase, S open-market sale; M exercise, F tax withholding, A grant and G gift are routine. A 10b5-1 flag means the trade ran under a plan adopted in advance. Method notes in where the numbers come from.