Costco Wholesale Corp
COST- Exchange
- Nasdaq
- Industry
- Retail-Variety Stores
- SEC CIK
- 0000909832
No open-market purchases or sales by Costco Wholesale Corp insiders were filed in the last 90 days; 4,260 institutions reported holding it in 13F filings for Q2 2026, worth $309.6B in total; 4 superinvestors hold it, including Markel Group and Gardner Russo & Quinn.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Costco Wholesale Corp insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 0 filings
- Open-market sells
- 0 filings
- Insiders trading
- 0
- Net value
- $0
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Costco Wholesale Corp, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Wilcox William Richard | Executive Vice President | 4,194 | Sep 14, 2026 | 2 |
| Rubananko Yoram | Executive Vice President | 10,680 | Sep 14, 2026 | 1 |
| Riel Pierre | Executive Vice President | 14,246 | Sep 14, 2026 | 1 |
| Klauer James C | Executive Vice President | 48,030 | Sep 14, 2026 | 3 |
| Jones Teresa A. | Executive Vice President | 6,598 | Sep 14, 2026 | 3 |
| Frates Caton | Executive Vice President | 8,713 | Sep 14, 2026 | 4 |
| Adamo Claudine | Executive Vice President | 9,334 | Sep 14, 2026 | 3 |
| Raikes Jeffrey S | Director | 6,044 | Jul 14, 2026 | 4 |
| Denman Kenneth D | Director | 4,779 | Jun 25, 2026 | 3 |
| Millerchip Gary | Executive Vice President | 15,465 | Mar 13, 2026 | 2 |
| George Sarah Catherine | Executive Vice President | 0Indirect | Mar 13, 2026 | 1 |
| Decker Susan L | Director | 8,532 | Jan 20, 2026 | 3 |
| Raimondo Gina Marie | Director | 215 | Jan 20, 2026 | 1 |
| Miller Russell D | Sr. Executive Vice President | 8,240Indirect | Jan 12, 2026 | 2 |
| Polit Javier | Executive Vice President | 10,190 | Dec 31, 2025 | 2 |
| Stanton John W | Director | 24,090 | Oct 24, 2025 | 1 |
| Jewell Sarah Mr Sally | Director | 3,613 | Oct 24, 2025 | 1 |
| Wilderotter Mary Agnes | Director | 3,205 | Oct 24, 2025 | 1 |
| James Hamilton E | Director | 55,538 | Oct 24, 2025 | 1 |
| Foulkes Helena | Director | 1,087 | Oct 24, 2025 | 1 |
| Vachris Roland Michael | President and CEO | 52,258 | Oct 24, 2025 | 1 |
| Callans Patrick J | Executive Vice President | 60,895 | Oct 24, 2025 | 1 |
| Sullivan John Christopher | Executive VP | 47,671 | Oct 24, 2025 | 1 |
| Barbre Tiffany Marie | Other: Principal Accounting Officer | 5,155 | Oct 24, 2025 | 1 |
| Jelinek W Craig | Director | 204,365 | Dec 23, 2024 | 0 |
| Galanti Richard A | Executive Vice President | 27,400 | Oct 24, 2024 | 0 |
| Hines Daniel M. | Other: Principal Acctg Officer | 12,186 | Oct 24, 2024 | 0 |
| Munger Charles T | Director | 168,104 | Oct 24, 2023 | 0 |
| Murphy James P. | Executive VP | 38,084 | Oct 25, 2022 | 0 |
| Rose Timothy L. | Executive VP | 33,025 | Sep 14, 2022 | 0 |
| Libenson Richard M | Director, Other: Director Emeritus | 3,561 | Oct 26, 2021 | 0 |
| Portera Joseph P | Executive VP | 11,987 | Sep 16, 2021 | 0 |
| Moulton Paul G | Executive VP | 28,833 | Sep 16, 2021 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Jun 25, 2026 (view filing) | Jun 23 | 2 days | Denman Kenneth DDirector | SSale | −885 | $957.45 | −$847.3K | −15.6%4.78K after | |
| Apr 1, 2026 (view filing) | Apr 1 | Same day | Frates CatonExecutive Vice President | SSale | −700 | $993.00 | −$695.1K | −10.7%5.82K after | |
| Mar 11, 2026 (view filing) | Mar 9 | 2 days | Adamo ClaudineExecutive Vice President | SSale | −730 | $1,003.02 | −$732.2K | −10.7%6.12K after | |
| Jan 23, 2026 (view filing) | Jan 21 | 2 days | Jones Teresa A.Executive Vice President | SSale | −850 | $986.26 | −$838.3K | −16.7%4.23K after | |
| Jan 20, 2026 (view filing) | Jan 16 | 4 days | Decker Susan LDirector | SSale | −458 | $955.00 | −$437.4K | −5.1%8.53K after | |
| Jan 15, 2026 (view filing) | Jan 14 | 1 day | Klauer James CExecutive Vice President | SSale | −1.50K | $939.00 | −$1.41M | −3.2%44.8K after | |
| Jan 12, 2026 (view filing) | Jan 9 | 3 days | Miller Russell DSr. Executive Vice President | SSale | −1.50K | $916.32 | −$1.37M | −15.4%8.24K after | |
| Dec 31, 2025 (view filing) | Dec 29-30 | 2 days | Polit JavierExecutive Vice President | SSale | −2.61K | $866.29 | −$2.26M | −20.4%10.2K after | 2 lots |
| Nov 12, 2025 (view filing) | Nov 7 | 5 days | Wilcox William RichardExecutive Vice President | SSale | −2.40K | $930.13 | −$2.23M | −54.5%2.00K after | |
| Oct 24, 2025 (view filing) | Oct 24 | Same day | Barbre Tiffany MarieOther: Principal Accounting Officer | SSale | −1.24K | $934.62 | −$1.16M | −19.4%5.16K after | |
| Oct 24, 2025 (view filing) | Oct 24 | Same day | Adamo ClaudineExecutive Vice President | SSale | −2.70K | $935.68 | −$2.53M | −28.3%6.85K after | |
| Oct 1, 2025 (view filing) | Sep 29 | 2 days | Miller Russell DSr. Executive Vice President | SSale | −3.38K | $915.00 | −$3.09M | −25.8%9.74K after | |
| Sep 30, 2025 (view filing) | Sep 29 | 1 day | Frates CatonExecutive Vice President | SSale | −1.54K | $910.02 | −$1.40M | −14.2%9.28K after | |
| Aug 22, 2025 (view filing) | Aug 20 | 2 days | Jones Teresa A.Executive Vice President | SSale | −600 | $992.05 | −$595.2K | −20.3%2.36K after | |
| Jul 15, 2025 (view filing) | Jul 14 | 1 day | Rubananko YoramExecutive Vice President | SSale | −4.00K | $974.96 | −$3.90M | −40.9%5.77K after | |
| Jun 20, 2025 (view filing) | Jun 18 | 2 days | Decker Susan LDirector | SSale | −547 | $980.00 | −$536.1K | −4.5%11.5K after | 2 lots |
| Jun 10, 2025 (view filing) | Jun 9 | 1 day | Callans Patrick JExecutive Vice President | SSale | −3.00K | $1,002.77 | −$3.01M | −4.9%58.5K after | |
| Jun 9, 2025 (view filing) | Jun 6 | 3 days | Riel PierreExecutive Vice President | SSale | −2.00K | $1,014.15 | −$2.03M | −19.6%8.21K after | |
| Apr 21, 2025 (view filing) | Apr 17 | 4 days | Klauer James CExecutive Vice President | SSale | −4.00K | $981.07 | −$3.92M | −8.3%44.0K after | |
| Mar 27, 2025 (view filing) | Mar 27 | Same day | Millerchip GaryExecutive Vice President | SSale | −1.10K | $940.01 | −$1.03M | −9.0%11.2K after | |
| Mar 25, 2025 (view filing) | Mar 24 | 1 day | Adamo ClaudineExecutive Vice President | SSale | −900 | $922.56 | −$830.3K | −11.4%6.99K after | |
| Mar 20, 2025 (view filing) | Mar 18 | 2 days | Frates CatonExecutive Vice President | SSale | −850 | $900.25 | −$765.2K | −9.7%7.88K after | |
| Mar 13, 2025 (view filing) | Mar 11 | 2 days | Vachris Roland MichaelPresident and CEO | SSale | −3.60K | $931.00 | −$3.35M | −8.1%41.1K after | |
| Oct 24, 2024 (view filing) | Oct 24 | Same day | Galanti Richard AExecutive Vice President | SSale | −1.42K | $894.68 | −$1.27M | −4.9%27.4K after | |
| Oct 24, 2024 (view filing) | Oct 23 | 1 day | Jones Teresa A.Executive Vice President | SSale | −800 | $896.55 | −$717.2K | −21.3%2.96K after | |
| Oct 15, 2024 (view filing) | Oct 15 | Same day | Riel PierreExecutive Vice President | SSale | −2.00K | $896.71 | −$1.79M | −16.4%10.2K after | |
| Oct 15, 2024 (view filing) | Oct 11 | 4 days | Miller Russell DSr. Executive Vice President | SSale | −4.40K | $891.15 | −$3.92M | −30.1%10.2K after | |
| Oct 2, 2024 (view filing) | Sep 30 | 2 days | Adamo ClaudineExecutive Vice President | SSale | −3.20K | $888.99 | −$2.84M | −27.1%8.63K after | |
| Oct 2, 2024 (view filing) | Sep 30 | 2 days | Callans Patrick JExecutive Vice President | SSale | −2.50K | $893.94 | −$2.23M | −3.6%66.4K after | |
| Oct 2, 2024 (view filing) | Sep 30 | 2 days | Frates CatonExecutive Vice President | SSale | −1.70K | $883.35 | −$1.50M | −14.9%9.68K after | |
| Aug 29, 2024 (view filing) | Jul 25 | 35 daysLate | Jones Teresa A.Executive Vice President | SSale | −4 | $832.55 | −$3.33K | −0.1%4.94K after | |
| Aug 15, 2024 (view filing) | Aug 13-15 | 2 days | Galanti Richard AExecutive Vice President | SSale | −1.00K | $868.97 | −$869.0K | −4.2%22.9K after | 2 lots |
| Aug 15, 2024 (view filing) | Aug 15 | Same day | Decker Susan LDirector | SSale | −620 | $876.50 | −$543.4K | −5.0%11.8K after | |
| Jul 15, 2024 (view filing) | Jul 15 | Same day | Denman Kenneth DDirector | SSale | −350 | $851.53 | −$298.0K | −5.6%5.92K after | |
| Jul 15, 2024 (view filing) | Jul 12-15 | 3 days | Hines Daniel M.Other: Principal Acctg Officer | SSale | −3.00K | $846.37 | −$2.54M | −21.4%11.0K after | 2 lots |
| Apr 18, 2024 (view filing) | Apr 17 | 1 day | Miller Russell DSenior EVP | SSale | −785 | $722.86 | −$567.4K | −7.3%10.0K after | |
| Mar 13, 2024 (view filing) | Mar 11 | 2 days | Adamo ClaudineExecutive Vice President | SSale | −1.50K | $714.83 | −$1.07M | −18.3%6.69K after | |
| Mar 13, 2024 (view filing) | Mar 11 | 2 days | Callans Patrick JExecutive VP | SSale | −2.50K | $714.86 | −$1.79M | −3.8%62.9K after | |
| Feb 12, 2024 (view filing) | Feb 9 | 3 days | Decker Susan LDirector | SSale | −1.44K | $723.48 | −$1.04M | −10.4%12.4K after | |
| Jan 23, 2024 (view filing) | Jan 23 | Same day | Jelinek W CraigDirector | SSale | −8.00K | $685.93 | −$5.49M | −3.6%216.2K after | |
| Jan 18, 2024 (view filing) | Jan 18 | Same day | Rubananko YoramExecutive VP | SSale | −2.50K | $680.33 | −$1.70M | −29.7%5.91K after | |
| Jan 16, 2024 (view filing) | Jan 16 | Same day | Frates CatonExecutive Vice President | SSale | −740 | $683.50 | −$505.8K | −9.9%6.72K after | |
| Jan 10, 2024 (view filing) | Jan 9 | 1 day | Hines Daniel M.Other: Principal Acctg Officer | SSale | −1.40K | $662.30 | −$927.2K | −9.1%13.9K after | |
| Jan 2, 2024 (view filing) | Dec 28, 2023 | 5 days | Hines Daniel M.Other: Principal Acctg Officer | SSale | −1.40K | $662.81 | −$927.9K | −8.4%15.3K after | |
| Dec 20, 2023 (view filing) | Dec 19 | 1 day | Galanti Richard AExecutive VP and CFO | SSale | −1.11K | $680.21 | −$756.2K | −4.4%24.3K after | |
| Nov 13, 2023 (view filing) | Nov 8 | 5 days | Galanti Richard AExecutive VP and CFO | SSale | −2.00K | $566.09 | −$1.13M | −7.3%25.4K after | 2 lots |
| Nov 8, 2023 (view filing) | Nov 7 | 1 day | Riel PierreEVP | SSale | −3.00K | $571.12 | −$1.71M | −28.8%7.42K after | |
| Nov 6, 2023 (view filing) | Nov 3 | 3 days | Miller Russell DSenior EVP | SSale | −4.50K | $557.75 | −$2.51M | −29.4%10.8K after | |
| Oct 24, 2023 (view filing) | Oct 23 | 1 day | Adamo ClaudineExecutive Vice President | SSale | −2.56K | $548.92 | −$1.41M | −24.0%8.13K after | |
| Oct 12, 2023 (view filing) | Oct 11 | 1 day | Klauer James CExecutive Vice President | SSale | −1.50K | $562.01 | −$843.0K | −3.2%45.1K after |