COST
Costco Wholesale Corp
1,012.30$
+1.6%
vs. previous close
Closing price · As of: Oct 30, 2026
Ownership
Ownership Structure
Who owns Costco Wholesale Corp (COST)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.8% of the shares are freely tradable; institutional investors hold 73.8%.
Institutional ownership
?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
73.8%
Insiders
?Share of the stock held by the executives, founders and major shareholders of the company itself.
0.2%
Float
?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
99.8%
Short % of float
?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
1.7%
Shares Outstanding
?Total number of shares issued. Price times share count gives market cap.
443Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 7.72 | 34,202,834 | -2.1 | 06/30/2026 |
| Vanguard Capital Management, LLC | 6.54 | 28,976,605 | +0.4 | 06/30/2026 |
| State Street Corp | 4.15 | 18,384,951 | +1.3 | 06/30/2026 |
| Amvescap Plc. | 3.16 | 13,989,137 | +2.6 | 06/30/2026 |
| Geode Capital Management, LLC | 2.40 | 10,627,472 | -0.3 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 2.35 | 10,402,555 | -2.8 | 06/30/2026 |
| Morgan Stanley - Brokerage Accounts | 2.31 | 10,220,437 | +3.3 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 3.18 | 14,074,997 | -0.2 | 09/30/2026 |
| Vanguard 500 Index Investor | 2.63 | 11,647,313 | -1.2 | 09/30/2026 |
| Invesco QQQ Trust | 2.09 | 9,263,258 | -0.2 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Vachris Roland Michael | President and CEO | 62,575 | 63,345,122 $ | Oct 22, 2026 | direct |
| James Hamilton E | Director | 55,804 | 56,490,324 $ | Oct 22, 2026 | direct |
| Sullivan John Christopher | Executive VP | 48,460 | 49,055,952 $ | Oct 22, 2026 | direct |
| Klauer James C | Executive Vice President | 45,929 | 46,493,435 $ | Oct 22, 2026 | direct |
| Stanton John W | Director | 24,356 | 24,655,514 $ | Oct 22, 2026 | direct |
| Millerchip Gary | Executive Vice President | 19,975 | 20,220,246 $ | Oct 22, 2026 | direct |
| Riel Pierre | Executive Vice President | 14,246 | 14,421,454 $ | Sep 10, 2026 | direct |
| Polit Javier | Executive Vice President | 12,747 | 12,903,764 $ | Oct 22, 2026 | direct |
| Rubanenko Yoram | Executive Vice President | 10,680 | 10,811,533 $ | Sep 10, 2026 | direct |
| Decker Susan L | Director | 8,798 | 8,906,151 $ | Oct 22, 2026 | direct |
| Wilderotter Mary Agnes | Director | 8,527 | 8,631,817 $ | Oct 22, 2026 | direct |
| Frates Caton | Sr. Executive Vice President | 7,912 | 8,009,318 $ | Sep 29, 2026 | direct |
| Jones Teresa A. | Executive Vice President | 6,598 | 6,679,428 $ | Sep 10, 2026 | direct |
| Barbre Tiffany Marie | Principal Accounting Officer | 6,584 | 6,664,659 $ | Oct 22, 2026 | direct |
| Adamo Claudine | Executive Vice President | 6,442 | 6,520,879 $ | Oct 22, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 22, 2026 | Sullivan John Christopher | Executive VP | Other | 836 | 1,018.21 | 851,224 |
| Oct 22, 2026 | Sullivan John Christopher | Executive VP | Other | 732 | 1,018.21 | 745,330 |
| Oct 22, 2026 | Sullivan John Christopher | Executive VP | Other | 975 | 1,018.21 | 992,755 |
| Oct 22, 2026 | Sullivan John Christopher | Executive VP | Other | 647 | 1,018.21 | 658,782 |
| Oct 22, 2026 | Sullivan John Christopher | Executive VP | Other | 573 | 1,018.21 | 583,434 |
| Oct 22, 2026 | Sullivan John Christopher | Executive VP | Other | 4,552 | 0.00 | – |
| Oct 22, 2026 | Self Adam Webb | Executive Vice President | Other | 41 | 1,018.21 | 41,747 |
| Oct 22, 2026 | Self Adam Webb | Executive Vice President | Other | 36 | 1,018.21 | 36,656 |
| Oct 22, 2026 | Self Adam Webb | Executive Vice President | Other | 57 | 1,018.21 | 58,038 |
| Oct 22, 2026 | Self Adam Webb | Executive Vice President | Other | 64 | 1,018.21 | 65,165 |
| Oct 22, 2026 | Self Adam Webb | Executive Vice President | Other | 62 | 1,018.21 | 63,129 |
| Oct 22, 2026 | Polit Javier | Executive Vice President | Other | 549 | 1,018.21 | 558,997 |
| Oct 22, 2026 | Polit Javier | Executive Vice President | Other | 337 | 1,018.21 | 343,137 |
| Oct 22, 2026 | Polit Javier | Executive Vice President | Other | 294 | 1,018.21 | 299,354 |
| Oct 22, 2026 | Polit Javier | Executive Vice President | Other | 391 | 1,018.21 | 398,120 |
| Oct 22, 2026 | Polit Javier | Executive Vice President | Other | 4,129 | 0.00 | – |
| Oct 22, 2026 | Millerchip Gary | Executive Vice President | Other | 817 | 1,018.21 | 831,878 |
| Oct 22, 2026 | Millerchip Gary | Executive Vice President | Other | 500 | 1,018.21 | 509,105 |
| Oct 22, 2026 | Millerchip Gary | Executive Vice President | Other | 313 | 1,018.21 | 318,700 |
| Oct 22, 2026 | Millerchip Gary | Executive Vice President | Other | 6,140 | 0.00 | – |
| Oct 22, 2026 | Vachris Roland Michael | President and CEO | Other | 1,131 | 1,018.21 | 1,151,596 |
| Oct 22, 2026 | Vachris Roland Michael | President and CEO | Other | 1,121 | 1,018.21 | 1,141,413 |
| Oct 22, 2026 | Vachris Roland Michael | President and CEO | Other | 1,404 | 1,018.21 | 1,429,567 |
| Oct 22, 2026 | Vachris Roland Michael | President and CEO | Other | 13,973 | 0.00 | – |
| Oct 22, 2026 | Wilderotter Mary Agnes | Director | Other | 266 | 0.00 | – |
| Oct 22, 2026 | Stanton John W | Director | Other | 266 | 0.00 | – |
| Oct 22, 2026 | Raimondo Gina Marie | Director | Other | 266 | 0.00 | – |
| Oct 22, 2026 | Raikes Jeffrey S | Director | Other | 266 | 0.00 | – |
| Oct 22, 2026 | Klauer James C | Executive Vice President | Other | 542 | 1,018.21 | 551,870 |
| Oct 22, 2026 | Klauer James C | Executive Vice President | Other | 443 | 1,018.21 | 451,067 |
| Oct 22, 2026 | Klauer James C | Executive Vice President | Other | 530 | 1,018.21 | 539,651 |
| Oct 22, 2026 | Klauer James C | Executive Vice President | Other | 396 | 1,018.21 | 403,211 |
| Oct 22, 2026 | Klauer James C | Executive Vice President | Other | 191 | 1,018.21 | 194,478 |
| Oct 22, 2026 | Jewell Sarah Mr Sally | Director | Other | 266 | 0.00 | – |
| Oct 22, 2026 | James Hamilton E | Director | Other | 266 | 0.00 | – |
| Oct 22, 2026 | George Sarah Catherine | Executive Vice President | Other | 47 | 1,018.21 | 47,856 |
| Oct 22, 2026 | George Sarah Catherine | Executive Vice President | Other | 35 | 1,018.21 | 35,637 |
| Oct 22, 2026 | George Sarah Catherine | Executive Vice President | Other | 56 | 1,018.21 | 57,020 |
| Oct 22, 2026 | George Sarah Catherine | Executive Vice President | Other | 62 | 1,018.21 | 63,129 |
| Oct 22, 2026 | George Sarah Catherine | Executive Vice President | Other | 60 | 1,018.21 | 61,093 |
| Oct 22, 2026 | Foulkes Helena | Director | Other | 266 | 0.00 | – |
| Oct 22, 2026 | Denman Kenneth D | Director | Other | 266 | 0.00 | – |
| Oct 22, 2026 | Decker Susan L | Director | Other | 266 | 0.00 | – |
| Oct 22, 2026 | Barbre Tiffany Marie | Principal Accounting Officer | Other | 166 | 1,018.21 | 169,023 |
| Oct 22, 2026 | Barbre Tiffany Marie | Principal Accounting Officer | Other | 85 | 1,018.21 | 86,548 |
| Oct 22, 2026 | Barbre Tiffany Marie | Principal Accounting Officer | Other | 102 | 1,018.21 | 103,857 |
| Oct 22, 2026 | Barbre Tiffany Marie | Principal Accounting Officer | Other | 94 | 1,018.21 | 95,712 |
| Oct 22, 2026 | Barbre Tiffany Marie | Principal Accounting Officer | Other | 90 | 1,018.21 | 91,639 |
| Oct 22, 2026 | Barbre Tiffany Marie | Principal Accounting Officer | Other | 1,965 | 0.00 | – |
| Oct 22, 2026 | Adamo Claudine | Executive Vice President | Other | 109 | 1,018.21 | 110,985 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.