

Amazon vs Costco
Global online retailer with major cloud and advertising business vs Warehouse club with steady membership revenue. Which is the better buy for your portfolio in September 2026? Plain-English answer below.
Amazon runs one of the world's most complex logistics and cloud computing empires, compounding free cash flow at a scale that few companies in history have matched, while Costco has mastered the art of retail simplicity by charging membership fees and running a warehouse model that keeps margins razor-thin and customer loyalty fanatical. Both companies have earned cult-like status among long-term investors who prize consistency and competitive moats above short-term earnings beats. The Amazon vs Costco comparison forces a choice between two defining business models of modern commerce and weighs which stock offers the better setup today.
Amazon runs one of the world's most complex logistics and cloud computing empires, compounding free cash flow at a scale that few companies in history have matched, while Costco has mastered the art o...
Why It’s Moving

Amazon is drawing attention as investors focus on AI, board changes, and cloud expansion.
- Amazon added cybersecurity veteran Kevin Mandia to its board, reinforcing a security-focused push as the company expands across cloud, consumer, and satellite businesses.
- The company also continued hiring and operational reshaping in multiple areas, including reported job cuts in Washington state, which signals a mix of cost discipline and heavier investment in AI and automation.
- Fresh Amazon Leo and AWS-related updates, including new launch commitments and customer wins, helped keep attention on long-duration growth drivers tied to cloud infrastructure and connectivity.

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.

Amazon is drawing attention as investors focus on AI, board changes, and cloud expansion.
- Amazon added cybersecurity veteran Kevin Mandia to its board, reinforcing a security-focused push as the company expands across cloud, consumer, and satellite businesses.
- The company also continued hiring and operational reshaping in multiple areas, including reported job cuts in Washington state, which signals a mix of cost discipline and heavier investment in AI and automation.
- Fresh Amazon Leo and AWS-related updates, including new launch commitments and customer wins, helped keep attention on long-duration growth drivers tied to cloud infrastructure and connectivity.

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

Amazon
AMZN
Pros
- Amazon's e-commerce platform is supported by a highly efficient logistics network, enabling consistently low prices and strong customer retention.
- Amazon Web Services remains a dominant cloud provider, generating substantial and growing operating income for the company.
- Amazon's stock is currently trading below its estimated intrinsic value according to discounted cash flow models, suggesting potential upside.
Considerations
- Amazon faces intense competition in both e-commerce and cloud services, which could pressure margins and growth rates.
- The company's profitability is sensitive to macroeconomic conditions and consumer spending trends, making it somewhat cyclical.
- Amazon's valuation, while below intrinsic value, is still elevated compared to some peers, increasing downside risk if growth slows.

Costco
COST
Pros
- Costco's membership model delivers high customer retention and recurring revenue, contributing to stable earnings growth.
- Recent membership fee increases are expected to boost earnings, with most of the benefit materialising in 2025 and 2026.
- Costco maintains a strong balance sheet and consistent cash flow, supporting its ability to invest and return capital to shareholders.
Considerations
- Costco's stock is trading at a premium forward price-to-earnings ratio, indicating it may be overvalued relative to fundamentals.
- The company's growth is largely dependent on physical store expansion, which can be capital-intensive and slower than digital models.
- Costco's business is exposed to inflation and supply chain disruptions, which could affect margins and operational efficiency.
Amazon (AMZN) Next Earnings Date
The next AMZN earnings date is expected to be October 29, 2026. It will cover Q3 2026 results. Amazon has not yet formally confirmed the date, but this timing matches its typical late-October 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.
Amazon (AMZN) Next Earnings Date
The next AMZN earnings date is expected to be October 29, 2026. It will cover Q3 2026 results. Amazon has not yet formally confirmed the date, but this timing matches its typical late-October 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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