Who Owns Costco

Costco is a publicly traded company with no single controlling owner, with ownership spread across large institutional investors like Vanguard, BlackRock, and State Street.

Costco is the third largest retailer in the world by revenue, operating a membership based warehouse club model that has built a loyal, longstanding customer base across the United States and internationally over many decades.

Costco was founded in 1983 by James Sinegal and Jeffrey Brotman, though neither founder holds a significant ownership stake today since decades of stock trading has diluted their original shares.

So if the founders no longer control it, who actually has the biggest say in how Costco is run?

This guide covers Costco’s ownership structure, its founding history, current leadership, and whether a Costco membership is genuinely worth the cost in 2026.

So lets get started.

Costco Ownership Structure Today

Costco’s SEC filings confirm the company has no controlling shareholder, with institutional investors owning the large majority of outstanding shares.

Vanguard Group holds approximately 9 percent of Costco shares, making it the largest single institutional shareholder, followed by BlackRock at around 6 percent and State Street at around 3 percent.

Costco Founders James Sinegal And Jeffrey Brotman

James Sinegal and Jeffrey Brotman opened the first Costco warehouse in Seattle in 1983, building on Sinegal’s earlier retail experience working for discount retail pioneer Sol Price.

Brotman passed away in 2017, and while his heirs still hold some Costco shares, the family’s combined stake represents a small fraction of the company’s total outstanding shares.

Sinegal served as Costco CEO until his retirement in 2012 and has also sold down much of his personal stake over the years since stepping back from daily operations.

Costco Leadership Today

Ron Vachris became Costco CEO in January 2024, succeeding longtime CEO Craig Jelinek, who had led the company since 2012 and helped oversee significant international expansion.

Vachris has continued Costco’s traditional approach of prioritizing low prices and employee wages over short term profit maximization, a strategy widely credited with the company’s customer loyalty.

How Costco Makes Money

Costco generates a significant portion of its profit from membership fees rather than markup on merchandise, which allows it to keep product prices unusually low compared to typical retailers.

This membership fee model is a key reason Costco can operate on thinner retail margins than competitors while still generating strong profits for shareholders.

Costco Versus Walmart And Sam’s Club

Unlike Walmart, which remains heavily influenced by the Walton family through concentrated voting shares, Costco has no comparable founding family control today.

Sam’s Club, Walmart’s warehouse division, competes directly with Costco but has generally trailed in membership growth and customer satisfaction surveys over the past decade.

Costco Kirkland Signature Private Label

Kirkland Signature, Costco’s private label brand, generates billions of dollars in annual sales and is manufactured by a range of third party suppliers rather than by Costco itself.

Many Kirkland Signature products are made by well known name brand manufacturers under private label agreements, though Costco generally does not publicly disclose which specific suppliers make each item.

Is A Costco Membership Worth It

Costco consistently ranks among the highest rated retailers for customer satisfaction, with members frequently citing bulk savings, product quality, and a generous return policy as key reasons for loyalty.

Common criticisms include the upfront membership fee and the need to buy items in bulk, which does not suit every household or shopping style. Better Business Bureau records for Costco show a generally strong accreditation rating, with most complaints related to individual store experiences rather than the company as a whole.

Consumer Reports surveys have repeatedly ranked Costco near the top among general retailers for overall customer satisfaction, citing strong value and product quality.

For households that shop regularly and can use bulk quantities, a Costco membership typically pays for itself within the first few visits through gas and grocery savings alone.

Frequently Asked Questions About Who Owns Costco

Who owns Costco in 2026?

Costco is a publicly traded company with no controlling owner, with Vanguard, BlackRock, and State Street as its largest institutional shareholders.

Do the founders still own Costco?

No, founders James Sinegal and Jeffrey Brotman no longer hold significant ownership stakes, since decades of stock trading and estate planning diluted their original shares.

Who is Costco’s CEO now?

Ron Vachris has served as Costco CEO since January 2024, succeeding longtime CEO Craig Jelinek.

Is Costco owned by Walmart?

No, Costco and Walmart are separate, independently owned public companies, though both operate competing warehouse club formats through Sam’s Club and Costco.

For a look at how Costco’s biggest retail rival is owned, see who owns Walmart.