Walmart (NYSE:WMT | WMT Price Prediction) and Costco (NASDAQ:COST) both posted fresh quarters reinforcing their status as safe havens, but the underlying businesses are pulling in different directions. Walmart leaned on automation, advertising, and marketplace scale. Costco leaned on membership renewals and Kirkland. With consumers guarded on discretionary goods, the comparison feels sharper than usual.
Automation Lifts Walmart. Memberships Steady Costco.
Walmart’s Q1 FY27 revenue reached $175.68 billion, up 6.1% year over year, with global eCommerce climbing 26% and advertising revenue up 37%. CEO John Furner framed it plainly: “Our teams are adopting innovative technologies, driving productivity through automation, and growing higher-margin commerce solutions.” Marketplace sales jumped nearly 50%, the best in 10 quarters, and general merchandise share gains were the strongest in five years, notably among upper-income households.
Costco’s Q3 FY26 revenue hit $70.53 billion, up 11.58% year over year, with comparable sales of +9.8% and digitally-enabled comps +21.5%. Membership fees rose 10.7%, and worldwide renewals held at 89.7%. The digital story centers on personalized carousels and mobile ordering, staying short of enterprise AI.
| Business Driver | Walmart | Costco |
| Main Growth Engine | eCommerce, ads, marketplace | Membership fees, Kirkland |
| Automation Depth | ~50% eComm FC volume automated | Push notifications, Pre-Scan rollout |
| Comp Momentum | +4.1% U.S. ex-fuel | +6.6% adj |
One Retailer Is Rebuilding Its Cost Base. The Other Is Optimizing.
Walmart is spending hard to convert scale into structural margin. Roughly 60% of stores now receive automated freight, and the VIZIO acquisition is turning connected TV into an advertising platform. Capex ran $6.68 billion in Q1, up 34% YoY, which pushed free cash flow negative. The AI-fueled ad and marketplace flywheel is a genuine margin lever.
Costco’s model is more surgical. Plans call for ~12 new warehouses and 940 total by year-end FY26, with Kirkland price cuts on select items. The tech playbook feels narrower.
The Next Test Is Whether AI Actually Widens Margins
I want to see Walmart Connect keep compounding and marketplace mix keep lifting general merchandise gross rate. On Costco, I am watching whether renewal rates stay near 90% now that pricing has crept higher. Valuation matters: WMT trades at 37x forward earnings versus Costco at 41x. Neither is cheap.
Why I Lean Toward Walmart for This Cycle
On the current setup, Walmart looks like the more compelling story. The Gemini partnership and algorithmic fulfillment cost frameworks give it a credible path to expanding 4.18% operating margins on a $713 billion revenue base. Costco remains a fortress with renewal-driven predictability that appeals to defensive-minded readers. The AI-powered advertising and automation flywheel at Walmart is the more interesting margin story into 2027, especially with 37 buy ratings versus 1 sell backing the thesis. I would reconsider if tariff refunds slip or inventory keeps building.
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