If you have ever wondered who owns Costco, the answer is simpler than the rumors suggest. Costco is not owned by Walmart, China, the Walton family, or a single billionaire. Costco Wholesale Corporation is a publicly traded company, and its shares are held by investors through the public stock market.
That distinction matters. A Costco membership gives you access to its warehouses, while owning Costco stock gives you an ownership interest in the corporation.
As of August 20, 2026, Costco trades on Nasdaq under COST, with shareholders, a board of directors, and executive management playing different roles.
This article separates confirmed corporate facts from dated shareholder estimates so you can see who owns Costco, who its largest institutional holders are, who controls the company, and how Costco grew from the Price Club and Costco businesses into today’s corporation.
AI Overview: Who Owns Costco?
Costco Wholesale Corporation is a publicly traded company owned collectively by its shareholders. It is not a subsidiary of Walmart or another major retailer, and Costco’s latest proxy does not identify a single controlling shareholder. Major investment firms such as Vanguard, BlackRock, and State Street have historically appeared among its largest institutional holders, although their exact positions change over time.
Key Takeaways
- Costco is a public company, traded on Nasdaq under the ticker COST.
- Costco is owned collectively by its shareholders rather than one private owner.
- Costco’s latest proxy does not identify a majority shareholder or controlling parent company.
- Vanguard, BlackRock, and State Street have been among the major institutional holders reported for Costco.
- Costco had 443,957,682 common shares outstanding as of November 7, 2025, with one vote attached to each common share.
- Costco’s history includes Price Club, founded by Sol Price in 1976, and Costco, founded by James Sinegal and Jeffrey Brotman in 1983.
- A Costco membership does not make you a shareholder. Stock ownership and membership are two different things.
Featured Snippet: Who Owns Costco?
Costco Wholesale Corporation is owned by its public shareholders because it is a publicly traded company. No single person or family is identified as Costco’s controlling owner in its latest proxy statement. Major institutional investors, including Vanguard, BlackRock, and State Street, have held significant Costco positions, but those holdings do not make them Costco’s parent company.
Who Owns Costco Today?
The most accurate answer is that Costco is owned by its shareholders.
Costco Wholesale Corporation is a publicly traded Washington corporation. Its common stock trades on Nasdaq under the ticker COST, allowing investors to buy and sell ownership interests through the public market.
Costco’s December 2025 proxy reported 443,957,682 common shares outstanding as of November 7, 2025. Each common share carried one vote.
That structure is important because it means there is no separate founder-controlled class of Costco shares disclosed in the proxy that gives one individual special voting control.
In other words, you should not think of Costco as a privately held family business. It is a shareholder-owned public corporation.
Who Are Costco’s Largest Shareholders?
This is where the answer becomes more complicated.
Large investment managers have historically held substantial Costco positions. However, their holdings can change, and different financial websites may report different percentages because they use different reporting dates and methodologies.
The safest approach is therefore to distinguish confirmed ownership disclosures from third-party estimates.
| Institutional holder | What can responsibly be said |
|---|---|
| Vanguard | One of the major institutional holders reported for Costco |
| BlackRock | One of the major institutional holders reported for Costco |
| State Street | Another major institutional holder reported for Costco |
| Other institutions and individual investors | Hold the remaining publicly traded shares |
The key point is that a large institutional position is not the same as owning Costco outright. Investment managers can hold shares through funds and managed accounts on behalf of investors and clients.
Because ownership changes over time, a percentage from an older filing should never be presented as today’s exact figure without checking the relevant SEC filing.
Why Costco Shareholder Percentages Change
You may see different numbers for Costco institutional ownership on different websites.
That does not automatically mean one source is lying. Ownership data can have different reporting dates, and institutional investors regularly adjust their holdings.
For that reason, the SEC filings behind the ownership disclosure are more useful than treating a third-party ownership percentage as a permanent number.
Does Vanguard Own Costco?
Vanguard is widely reported as one of Costco’s largest institutional shareholders.
However, saying “Vanguard owns Costco” without qualification can give readers the wrong impression.
Vanguard is an investment management organization. A large position in Costco stock can represent shares associated with investment funds and accounts rather than a conventional parent-company relationship.
Most importantly, Costco’s proxy does not identify Vanguard as a majority owner or parent company.
So the accurate wording is: Vanguard has been a major institutional holder of Costco stock, but Vanguard does not own Costco as a wholly owned business.
Does BlackRock Own Costco?
BlackRock is also among the major institutional investors commonly associated with Costco stock.
Again, however, an institutional shareholder is not the same thing as a corporate parent.
BlackRock-related funds and accounts can hold Costco shares as investments. The size of such a position can change as portfolios are rebalanced and new filings are submitted.
Therefore, the useful distinction is simple: BlackRock can be a significant Costco shareholder without owning or operating Costco.
Does State Street Own Costco?
State Street is another major institutional investor associated with Costco.
Its relationship with Costco should be understood in the same way as other large investment managers. Holding Costco shares creates an investment and voting interest, but it does not turn State Street into Costco’s parent company.
For current percentages, always check the latest applicable SEC ownership disclosure rather than relying on an old ownership table.
How Does Costco Ownership Work?
The easiest way to understand Costco ownership is to separate three different groups: shareholders, the board, and management.
Shareholders own shares. Those shares represent economic and voting interests in the corporation.
The board provides oversight. Shareholders vote on directors and certain other corporate matters.
Management runs the business. Executives handle the company’s day-to-day operations under the board’s oversight. Costco’s December 2025 proxy identifies Ron M. Vachris as President and CEO and Hamilton E. James as non-executive Chairman.
That means the person running Costco is not automatically the person who owns Costco.
Costco Shareholder vs. Costco Member
This is one of the easiest points to misunderstand.
When you pay for a Costco membership, you receive the right to shop under Costco’s membership program. That does not make you a shareholder.
A Costco shareholder, by contrast, owns Costco common stock and receives the voting and economic rights associated with those shares.
So you can be:
- a Costco member without owning Costco stock;
- a Costco shareholder without being a Costco member; or
- both at the same time.
The two relationships are completely different.
Who Controls Costco?
Ownership and control are related, but they are not identical.
Costco’s common stock has one vote per share, according to its latest proxy. Shareholders use those votes for matters such as electing directors.
The board then provides corporate oversight and works with senior management.
As of the company’s December 2025 proxy, Ron M. Vachris serves as President and Chief Executive Officer and a director, while Hamilton E. James serves as non-executive Chairman of the Board.
That structure is why it would be misleading to say that Vanguard, BlackRock, the CEO, or Costco’s founders individually “run” Costco simply because they have an ownership or leadership connection.
Who Is Costco’s CEO?
Ron M. Vachris is Costco’s President and Chief Executive Officer, according to the company’s latest proxy statement. He also serves as a director.
His position means he leads the company’s executive operations. It does not mean he personally owns Costco.
Who Is Costco’s Chairman?
Hamilton E. James is identified as Costco’s non-executive Chairman of the Board in the December 2025 proxy.
The distinction between chairman and CEO matters because they are separate roles within Costco’s governance structure.
Who Founded Costco?
Costco’s history does not begin with today’s public shareholders.
The business traces its warehouse-club roots to Price Club, which Sol Price founded in San Diego in 1976.
Costco itself opened its first warehouse in Seattle in 1983, founded by James Sinegal and Jeffrey Brotman.
The two histories eventually came together.
What Was the Price Club Connection?
In 1993, Price Company and Costco merged to form Price/Costco.
Contemporary reporting from UPI stated that Price shareholders received 48% of the combined company while Costco shareholders received 52%.
That merger is one of the most important events for understanding why Costco’s corporate history includes both Price Club and Costco.
Britannica also records the development from Price Club and Costco into the modern Costco Wholesale Corporation.
Costco Ownership: Then vs. Now
| Period | Ownership story |
|---|---|
| 1976 | Sol Price founded Price Club |
| 1983 | James Sinegal and Jeffrey Brotman opened Costco |
| 1993 | Price Company and Costco merged |
| Today | Costco is a publicly traded corporation owned by shareholders |
The important takeaway is that the founders’ historical role is different from today’s ownership structure.
Is Costco Owned by Walmart?
No.
Costco and Walmart are separate companies.
Walmart operates Sam’s Club, another major membership warehouse business, but that does not make Walmart the owner of Costco.
Costco’s own SEC filings identify Costco Wholesale Corporation as the company operating its membership warehouses and e-commerce sites.
So if you see a claim that Walmart bought Costco, the appropriate response is to look for an official announcement and SEC filing rather than relying on a social-media post or rumor.
Is Costco Owned by China?
No evidence in Costco’s latest proxy identifies China, the Chinese government, or a Chinese company as Costco’s controlling owner.
Costco is a publicly traded U.S. corporation whose shares are held by public-market investors.
Costco’s own filings also show that the company operates internationally, including warehouses in China. International operations, however, are not the same thing as Chinese ownership.
Who Owns Costco’s Kirkland Signature Brand?
Kirkland Signature is Costco’s private-label brand.
It is part of Costco’s merchandise business rather than a separate publicly traded company that owns Costco.
The distinction matters because a brand can belong to a corporation without being a separate owner of that corporation.
So the ownership chain does not run from Kirkland Signature to Costco. It runs the other way: Kirkland Signature is a Costco private-label brand.
How Big Is Costco Today?
Ownership becomes easier to understand when you see the scale of the company being owned.
At August 31, 2025, Costco operated 914 membership warehouses worldwide, according to its FY2025 Form 10-K.
The same filing reported 81.0 million paid members at the end of fiscal 2025.
Costco also reported $269.9 billion in fiscal 2025 net sales, compared with $249.6 billion in fiscal 2024.
Those figures describe the size of the business rather than who owns its shares, but they help explain why Costco appears so frequently in institutional investment portfolios.
Costco’s 2026 Results
Costco continued reporting strong operating results during fiscal 2026.
For the third quarter ended May 10, 2026, Costco reported $69.15 billion in net sales, an increase of 11.6% from the same quarter a year earlier.
The company also reported $203.37 billion in net sales for the first 36 weeks of fiscal 2026, up 9.6% year over year.
These numbers do not change the answer to “who owns Costco?” They simply show that the publicly owned company remains a very large operating business.
Why Costco Ownership Numbers Can Be Confusing
If you search for Costco institutional ownership, you may encounter different percentages.
That is normal enough to require caution.
One website might calculate institutional ownership using one collection of filings, while another may use a different date or methodology. A Form 13F is also not a live ownership dashboard; it reports holdings for a particular period.
That means a figure such as “70% institutional ownership” should not automatically be treated as a permanent fact.
The Better Way to Check Costco Ownership
If you want the most defensible answer, follow these steps:
- Start with Costco’s latest proxy statement.
- Check the date attached to every ownership figure.
- Review relevant SEC Schedule 13G or 13D filings for major holders.
- Use third-party ownership trackers only as supplementary information.
- Do not combine percentages from different reporting periods.
- Separate ownership from management and corporate control.
This method prevents one of the most common mistakes in articles about public-company ownership: presenting several historical numbers as though they describe the same moment.
Common Mistakes When Researching Who Owns Costco
The first mistake is confusing a large shareholder with a parent company.
Vanguard, BlackRock, or another investment manager can hold a substantial number of Costco shares without owning Costco as a subsidiary.
The second mistake is confusing Costco membership with stock ownership.
Your membership lets you shop at Costco. It does not give you shareholder voting rights.
Another mistake is treating the founder as the current owner.
James Sinegal and Jeffrey Brotman played central roles in Costco’s founding, but Costco is now a public corporation with shares held by public investors.
Finally, avoid quoting an ownership percentage without its date. Institutional holdings change, and an old number can quickly become misleading.
How to Verify Who Owns Costco
You do not need to rely on rumors to answer the question.
Start with Costco’s investor-relations materials and SEC filings. Costco maintains a public SEC filing archive through its investor-relations website.
Next, look at the company’s proxy statement for disclosed principal shareholders and governance information.
Then check the relevant SEC ownership filings for institutional investors. This is especially useful when you need a specific shareholder’s latest reported position.
Most importantly, record the reporting date beside the percentage. That small detail makes ownership research much more reliable.
Costco vs. Sam’s Club vs. BJ’s: Ownership Structure
| Company | Ownership model | Parent relationship |
|---|---|---|
| Costco | Publicly traded | No controlling parent identified in Costco’s latest proxy |
| Sam’s Club | Business operated by Walmart | Walmart |
| BJ’s Wholesale Club | Publicly traded | Separate public company |
This comparison is useful because shoppers often group the three businesses together.
However, similar business models do not mean identical ownership structures. Costco is a separately traded public corporation, while Sam’s Club operates within Walmart.
Who Should Use This Ownership Information?
This information is useful if you are:
- researching Costco’s corporate structure;
- checking whether Costco is privately or publicly owned;
- researching Costco stock;
- studying major institutional shareholders;
- verifying Costco’s founders and history;
- writing about Costco’s ownership for business or educational purposes.
Who Should Avoid Using Old Ownership Figures?
Anyone making a current claim about Costco ownership should avoid relying on undated or old shareholder tables.
If the percentage matters, use a dated filing.
That is especially important for institutional investors because their positions can change after portfolio adjustments, and different filings cover different periods.
Practical Application: How to Check Costco Ownership Yourself
Suppose you find a website claiming that a particular company owns 10% of Costco.
Do not stop at the headline.
First, identify the date attached to the claim. Then find the underlying SEC filing and check whether the reported shares represent beneficial ownership, voting power, investment power, or another disclosed relationship.
After that, compare the filing date with Costco’s latest proxy.
Finally, phrase your conclusion precisely. Instead of saying, “Company X owns Costco,” say, “Company X was reported as holding X% of Costco’s shares as of [date],” when that is what the filing actually establishes.
That small difference protects the reader from a very common misunderstanding.
Conclusion: So, Who Owns Costco?
The next time you hear that a billionaire, retailer, foreign government, or family owns Costco, the simplest answer is to check the company’s filings.
Who owns Costco? Its public shareholders do. Costco Wholesale Corporation is a publicly traded company, and its latest proxy does not identify a single controlling shareholder or parent company.
The company’s history is more personal: Sol Price built Price Club, while James Sinegal and Jeffrey Brotman founded Costco, and the two businesses eventually merged in 1993. Today’s Costco, however, has a very different ownership structure from those early years.
The most useful lesson is that ownership, management, and membership are three different things. Once you separate those ideas, Costco’s corporate structure becomes much easier to understand.
And perhaps that is the simplest answer of all: Costco may feel like a familiar place where millions of people shop, but legally, it belongs to the shareholders who own its stock.
Frequently Asked Questions
Who owns Costco right now?
Costco is owned by its public shareholders. It is traded on Nasdaq under the ticker COST, and no single person or family controls the company.
Is Costco owned by Walmart?
No. Costco is a separate public company, while Walmart owns and operates Sam’s Club.
Who are the largest shareholders of Costco?
Major institutional investors include Vanguard, BlackRock, and State Street. Their exact ownership percentages can change over time.
Is Costco privately owned?
No. Costco is a publicly traded company, so its shares are owned by public investors.
Who founded Costco?
James Sinegal and Jeffrey Brotman opened the first Costco warehouse in Seattle in 1983. Costco’s history is also connected to Price Club, founded by Sol Price in 1976.
Does Vanguard own Costco?
Vanguard is one of Costco’s major institutional shareholders. However, it does not own Costco as a parent company.
Does BlackRock own Costco?
BlackRock-related funds are major Costco shareholders. However, BlackRock does not own Costco outright.
Can a Costco member vote on company decisions?
Not just because they have a membership. Voting rights come from owning Costco shares, not from being a Costco member.
Who is Costco’s CEO?
Ron M. Vachris is Costco’s President and CEO. Hamilton E. James is the company’s non-executive Chairman of the Board.
