Costco Wholesale (NASDAQ: COST) recorded $286.3 billion in trailing twelve-month revenue as of February 2026, an 8.4% year-over-year increase. The company’s market cap sits near $477 billion, making it the second-largest retailer by valuation behind Walmart. With 921 warehouse locations worldwide and a membership renewal rate of 89.7%, Costco remains the dominant force in the warehouse club segment.
This post breaks down Costco’s top 15 publicly traded competitors, competitive positioning, future market share outlook, and whether COST stock makes sense as a long-term hold in 2026.
Costco Competitors 2026 – TLDR;
Costco holds roughly 62% of the U.S. warehouse club market, with Walmart’s Sam’s Club at about 31% and BJ’s Wholesale at 7%.
Walmart (WMT) is Costco’s biggest publicly traded competitor by market cap at over $1 trillion, more than double Costco’s valuation.
Among Costco’s direct competitors, Sam’s Club and BJ’s Wholesale are the only other membership-based warehouse clubs operating at scale in the U.S.
Costco competitors in 2026 span warehouse clubs, grocery chains, discount retailers, and e-commerce platforms including Amazon, Target, and Kroger.
Costco’s Kirkland Signature private label and a 89.7% renewal rate are what sets Costco apart from its competitors in a market where switching costs are nearly zero.
Costco Competitors
The list below ranks the top 15 publicly traded Costco competitors by market capitalization as of May 2026. These companies compete with Costco across warehouse retail, grocery, discount stores, and e-commerce. Aldi, the fast-growing German discounter with nearly 2,800 U.S. stores, is excluded because it is privately held. Who are the competitors of Costco? Here is the full Costco competitors list:
| Ticker | Company Name | Market Cap | Subsector | Key Product Line Areas |
|---|---|---|---|---|
| WMT | Walmart Inc. | $1.05T | Discount / Warehouse | Grocery, general merchandise, Sam’s Club warehouse |
| AMZN | Amazon.com Inc. | $2.85T | E-commerce / Grocery | Online retail, Whole Foods, Prime membership, grocery delivery |
| TGT | Target Corporation | $55B | General Merchandise | Apparel, home goods, grocery, electronics |
| KR | Kroger Co. | $41.6B | Grocery | Supermarkets, pharmacies, fuel centers, private label |
| DG | Dollar General Corp. | $25.5B | Discount Retail | Consumables, household essentials, small-format stores |
| DLTR | Dollar Tree Inc. | $23B | Discount Retail | Value merchandise, consumables, Family Dollar stores |
| BJ | BJ’s Wholesale Club | $12.2B | Warehouse Club | Bulk groceries, general merchandise, gas stations |
| ACI | Albertsons Companies | $9.7B | Grocery | Supermarkets, pharmacies, Safeway, Vons, Jewel-Osco |
| SFM | Sprouts Farmers Market | $7.3B | Specialty Grocery | Natural and organic foods, vitamins, supplements |
| PSMT | PriceSmart Inc. | $4.8B | Warehouse Club | Membership warehouses in Latin America and Caribbean |
| GO | Grocery Outlet Holding | $2.5B | Discount Grocery | Opportunistic buying, deep discount groceries |
| NGVC | Natural Grocers | $1.3B | Specialty Grocery | Organic produce, vitamins, supplements, body care |
| WMK | Weis Markets | $1.8B | Regional Grocery | Supermarkets, pharmacy, fuel, mid-Atlantic region |
| VLGEA | Village Super Market | $0.4B | Regional Grocery | ShopRite supermarkets, New Jersey and Pennsylvania |
| OLLI | Ollie’s Bargain Outlet | $5.5B | Closeout Retail | Brand-name closeout merchandise, housewares, food |
The market cap gap between Costco and its two direct warehouse club competitors is enormous. BJ’s Wholesale, Costco’s nearest same-format rival, is roughly 39 times smaller by valuation. PriceSmart, which runs a similar model in Central and South America, is nearly 100 times smaller. Among Costco’s indirect competitors, only Walmart and Amazon exceed Costco in market capitalization.
Is Costco a Long-Term Buy?
Costco stock trades at a trailing P/E of roughly 56, well above Walmart at around 38 and far ahead of Kroger near 15. That premium reflects the company’s consistent execution: 8-9% annual revenue growth, rising membership income, and a 90% renewal rate that gives revenue high visibility.
The risks are straightforward. A P/E above 55 leaves little margin for error. Any slowdown in same-store sales or membership growth could trigger a sharp repricing. Competition from Sam’s Club is intensifying, and Amazon’s expanded grocery delivery adds pressure on digital.
For investors comfortable paying a premium for a proven retail operator with durable recurring revenue, Costco remains a strong long-term candidate. Those looking for value entry points may want to wait for a broader market pullback. This is not investment advice.
Costco Competitive Advantage
How does Costco differentiate itself from competitors? It starts with the membership model. The $65 Gold Star and $130 Executive tiers generated over $5 billion in fee income in the most recent fiscal year. Membership fees alone cover the majority of Costco’s operating profit, allowing the company to sell merchandise at near-cost pricing. That math is hard for traditional grocers and discounters to replicate.
Costco’s limited SKU strategy is the second structural edge. Each warehouse stocks roughly 3,800 items versus 30,000 or more at a typical supermarket. Fewer SKUs mean higher volume per item, which gives Costco far more leverage in supplier negotiations. Kirkland Signature, the company’s private label, generates an estimated $75 billion in annual sales and competes directly with name brands on quality.
Sales per square foot tell the story in concrete terms. Costco runs at approximately $1,700 to $1,800 per square foot across its average 147,000-square-foot warehouse. Sam’s Club operates near $1,100 per square foot. A typical Walmart Supercenter generates $430 to $650 per square foot. That productivity gap is a direct result of high member traffic, lean operations, and curated inventory.
Employee retention adds another layer. Costco’s average U.S. hourly wage now exceeds $31, and the company offers benefits that most competitors in the discount retail sector do not match. Lower turnover reduces hiring and training costs and keeps the in-store experience consistent.
Costco Future Market Share
Costco held approximately 62% of the U.S. warehouse club market in 2025, according to CFRA Research estimates. Sam’s Club accounted for roughly 31%, and BJ’s Wholesale held about 7%. That breakdown has stayed relatively stable for several years, and a Costco competitors analysis 2026 shows no major shift underway.
Costco plans to open 30 or more new warehouses per year going forward. About half of those openings will be outside the U.S., targeting growth in Asia, Europe, and Oceania. New warehouses opened in fiscal 2025 generated $192 million in annualized first-year sales, up from $150 million two years earlier. That means a brand-new Costco now matches the average existing Sam’s Club in revenue within its first twelve months.
Sam’s Club is not standing still. Walmart raised Sam’s Club membership fees in May 2026 for the first time since 2022 and has been investing in digital tools like Scan-and-Go. About 50% of new Costco sign-ups in fiscal 2025 and 2026 have come from people under 40, which suggests younger grocery shoppers are increasingly drawn to the warehouse model.
The biggest wildcard for Costco’s market share is e-commerce. Digital sales grew 20.5% year-over-year in the most recent quarter, and app traffic jumped 48%. But Amazon is expanding same-day grocery delivery aggressively, and Walmart already fulfills a third of online orders from stores in under three hours. How quickly Costco can scale its online fulfillment without eroding the in-store experience will shape the Costco vs competitors dynamic over the next several years.
FAQs
How many competitors does Costco have?
Costco has two direct warehouse club competitors in the U.S. (Sam’s Club and BJ’s Wholesale) and dozens of indirect competitors across grocery, discount retail, and e-commerce, including Walmart, Amazon, Target, and Kroger.
Who are the top 3 competitors of Costco?
Walmart (via Sam’s Club), Amazon, and BJ’s Wholesale Club. Walmart is the largest by market cap at over $1 trillion, Amazon competes on grocery delivery and Prime membership, and BJ’s is the third U.S. warehouse club.
What makes Costco different from its competitors?
Costco’s membership fee income covers most operating profit, allowing near-cost merchandise pricing. Its limited 3,800-SKU model drives higher sales per square foot than any major retail competitor.
What is Costco’s market share in the warehouse club segment?
Costco holds roughly 62% of U.S. warehouse club sales. Sam’s Club has about 31%, and BJ’s Wholesale accounts for roughly 7%, according to CFRA Research estimates.
Is Costco stock overvalued compared to competitors in 2026?
Costco trades at a trailing P/E near 56, compared to Walmart at 38 and Kroger at 15. The premium reflects consistent growth and high membership renewal, but it leaves less room for error than cheaper retail peers.
