

Walmart vs Costco
Global retail leader with grocery and online sales vs Warehouse club with steady membership revenue. Which is the better buy for your portfolio in September 2026? Plain-English answer below.
Walmart runs the world's largest retail operation with $600-billion-plus in annual revenue, a booming advertising business, and a healthcare push, while Costco operates a membership warehouse model that generates remarkable loyalty and consistent traffic growth on dramatically lower margins. Both retailers have consistently taken market share from weaker competitors and built supply chains that give them structural cost advantages. Walmart vs Costco makes readers decide whether Walmart's scale and omni-channel ambitions or Costco's treasure-hunt membership model is the better long-term compounder.
Walmart runs the world's largest retail operation with $600-billion-plus in annual revenue, a booming advertising business, and a healthcare push, while Costco operates a membership warehouse model th...
Why It’s Moving

Walmart gets a tariff boost, but beef scrutiny and margin questions are keeping the stock under pressure.
- A $2.9 billion tariff refund gave Walmart a fresh cash boost, but the benefit is expected to land in third-quarter results rather than immediately lifting day-to-day profits.
- The Justice Department widened its beef-price probe to include Walmart, putting a new spotlight on grocery affordability and possible margin pressure in a politically sensitive category.
- Investor attention is also turning to a packed September conference schedule, where management comments on advertising, marketplace growth, and consumer demand could shape expectations after a mixed stretch for the stock.

Costco’s latest sales update is keeping analyst sentiment constructive, even as valuation remains a sticking point
- Analysts turned more positive after Costco’s latest sales update, suggesting the company is still converting membership loyalty and traffic into steady top-line growth despite a premium valuation.
- A fresh upgrade from Freedom Broker and a reiterated Buy from BTIG kept sentiment constructive, reinforcing the view that Costco’s defensive model and consistent execution remain a draw for investors.
- Some firms stayed cautious, pointing to valuation concerns and mixed read-throughs from August sales, which is tempering enthusiasm even as the broader analyst consensus stays upbeat.

Walmart gets a tariff boost, but beef scrutiny and margin questions are keeping the stock under pressure.
- A $2.9 billion tariff refund gave Walmart a fresh cash boost, but the benefit is expected to land in third-quarter results rather than immediately lifting day-to-day profits.
- The Justice Department widened its beef-price probe to include Walmart, putting a new spotlight on grocery affordability and possible margin pressure in a politically sensitive category.
- Investor attention is also turning to a packed September conference schedule, where management comments on advertising, marketplace growth, and consumer demand could shape expectations after a mixed stretch for the stock.

Costco’s latest sales update is keeping analyst sentiment constructive, even as valuation remains a sticking point
- Analysts turned more positive after Costco’s latest sales update, suggesting the company is still converting membership loyalty and traffic into steady top-line growth despite a premium valuation.
- A fresh upgrade from Freedom Broker and a reiterated Buy from BTIG kept sentiment constructive, reinforcing the view that Costco’s defensive model and consistent execution remain a draw for investors.
- Some firms stayed cautious, pointing to valuation concerns and mixed read-throughs from August sales, which is tempering enthusiasm even as the broader analyst consensus stays upbeat.
Investment Analysis

Walmart
WMT
Pros
- Walmart forecasts 3.75-4.75% sales growth and EPS of $2.52-$2.62 for fiscal 2026.
- E-commerce sales surged 27% with 33% net income growth, bolstering omnichannel transformation.
- Past-year stock return reached 25%, outpacing Costco amid diversified revenue streams.
Considerations
- Forward P/E ratio of 36.02 exceeds its median of 35.58, indicating elevated valuation.
- Volatility measures 4.60%, higher than Costco's 3.10%, signalling greater price fluctuations.
- Three-year stock return forecast projects only 4.2%, trailing Costco's 15.5% outlook.

Costco
COST
Pros
- Return on invested capital at 33.7% nearly doubles Walmart's 17.1%, reflecting superior efficiency.
- Membership fees rose 14% in Q4, underpinning predictable recurring revenue growth.
- Consensus EPS estimate rose to $19.97, implying 11% year-over-year increase for current fiscal year.
Considerations
- Forward P/E ratio of 45.01 remains elevated despite being below one-year median of 50.39.
- Past-year stock performance increased only 4.4%, lagging Walmart's stronger momentum.
- E-commerce growth of 13.6% trails Walmart's 27%, constraining digital scalability.
Walmart (WMT) Next Earnings Date
Walmart’s next earnings date is expected to be November 19, 2026. The upcoming report will cover the third quarter of fiscal 2027. That timing matches the company’s established mid-November reporting pattern.
Costco (COST) Next Earnings Date
The next Costco earnings report is expected on September 24, 2026. It will cover Q4 fiscal 2026, based on Costco’s usual reporting cadence and the company’s scheduled Q4 earnings call. This timing is consistent with Costco’s historical late-September release pattern.
Walmart (WMT) Next Earnings Date
Walmart’s next earnings date is expected to be November 19, 2026. The upcoming report will cover the third quarter of fiscal 2027. That timing matches the company’s established mid-November reporting pattern.
Costco (COST) Next Earnings Date
The next Costco earnings report is expected on September 24, 2026. It will cover Q4 fiscal 2026, based on Costco’s usual reporting cadence and the company’s scheduled Q4 earnings call. This timing is consistent with Costco’s historical late-September release pattern.
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