Amazon said on 29 October that AWS segment sales rose 39% to $46.0 billion in the third quarter, from $33.0 billion a year earlier. Its release calls it the fastest growth in nearly five years.
In the same quarter, Amazon’s cash flow statement shows $77.3 billion of purchases of property and equipment, against $42.4 billion of operating cash flow. By our arithmetic, that is about 1.8 times.
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The key insight: By our arithmetic, Amazon’s $77.3 billion of third-quarter purchases of property and equipment were about 1.8 times the $42.4 billion of operating cash flow it generated in the same quarter, while AWS sales rose 39% to $46.0 billion.
The release says “AWS net sales increased 39.3%” to “a $184 billion annualized revenue run rate”. The segment table gives AWS sales of $45,984 million against $33,006 million a year earlier.
AWS segment operating income was $17,773 million, up from $11,434 million. By our arithmetic, that is an operating margin of about 38.7%, against about 34.6% a year earlier.
Consolidated net sales rose 12% to $201.9 billion, and operating income rose to $28.1 billion from $17.4 billion. The release calls the 13.9% operating margin “Amazonโs highest operating margin ever”.
Quarterly cloud revenue for the September 2026 quarter: AWS $46.0 billion (+39%), Azure $33.2 billion (+48%) and Google Cloud $30.7 billion (+103%). Ratios are our arithmetic. Sources: Amazon 8-K; Microsoft 10-Q and release; Alphabet Q3 release.
Key Updates: ๐น Anthropic: $9.5B pre-tax gain in Q3โ25 included in non-operating income ๐น AWS: $184B annualized revenue run rate; over 39% YoY growth ๐น AgentCore: Tens of thousands of customers; 2x more agents deployed in Q3 ๐น Alexa for Shopping: 400M+ customers; interactions up 570% YoY
Comments: ๐ธ โOur AWS investment in functionality and infrastructure is working, with over 39% year-over-year revenuegrowth in Q3 ($184 billion revenue run rate) and projected revenuegrowth rates of over 40% both in 2027 and in 2028โ
Wall St Engine on X, 29 Oct, comparing Amazon’s Q3 with estimates: revenue $201.9B (est. $202.3B); EPS $1.89 (est. $1.96), with the Anthropic gain; operating income $28.1B (est. $26.2B); AWS sales $46.0B (est. $45.4B); capex $77.3B (est. $57.47B); Q4 operating-income guide $28.5B-$33.5B (est. $33.1B).
What Jassy Said
CEO Andy Jassy said in the release: “Our AWS investment in functionality and infrastructure is working, with over 39% year-over-year revenuegrowth in Q3 ($184 billion revenue run rate) and projected revenuegrowth rates of over 40% both in 2027 and in 2028”.
He added: “There has never been a trillion dollar revenuebusiness, and we may have two of them in the next 5-10 years”.
AWS Against Azure and Google Cloud
Microsoft reported $33.2 billion of Azure revenue, up 48%, and Alphabet reported $30.7 billion of Google Cloud revenue, up 103%, for the same months. By our arithmetic, AWS was about 1.4 times Azure and 1.5 times Google Cloud, while growing more slowly than both. Our preview set out the markers: AWS’s 39.3% is above its 36.8% pace of the prior quarter and below Azure’s 48%.
Capex, Cash and Guidance
Purchases of property and equipment were $77,259 million in the quarter, against $35,095 million a year earlier and $54,208 million in the second quarter. By our arithmetic, that is about 2.2 times the year-ago figure.
For the trailing twelve months, the release says free cash flow was an outflow of $42.4 billion, “driven primarily by a year-over-year increase of $94.8 billion in purchases of property and equipment, net of proceeds from sales and incentives”. It adds: “This increase primarily reflects investments in artificial intelligence”.
Amazon guided fourth-quarter net sales of $240.0 billion to $247.0 billion and operating income of $28.5 billion to $33.5 billion, and said it continues to expect 2026 cash capital expenditures of “approximately $220 billion”. Our earlier piece compared Alphabet’s and Microsoft’s capex with their operating cash; our capstone set the two side by side.
The Structural Read
By our arithmetic, AWS added about $13.0 billion of quarterly sales in a year, from $33.0 billion to $46.0 billion.
As we read the release, Amazon ties the free cash flow outflow to purchases of property and equipment and says the increase primarily reflects investments in artificial intelligence.
As we read the three releases side by side, AWS remains the largest of the three clouds by quarterly revenue while Azure and Google Cloud grew faster in percentage terms.
Andy Jassy, Amazon release, 29 October 2026
“There has never been a trillion dollar revenuebusiness, and we may have two of them in the next 5-10 years”
Three Implications
FOR AWS CUSTOMERS Jassy said in the release that Amazon projects AWS revenuegrowth rates of over 40% in both 2027 and 2028.
FOR INVESTORS The release says trailing twelve-month free cash flow was an outflow of $42.4 billion, against an inflow of $14.8 billion a year earlier.
FOR RIVALS By our arithmetic, AWS was about 1.4 times Azure and 1.5 times Google Cloud by quarterly revenue.
The Business Engineer Lens
This story maps onto the Business Engineer framework The AI Capex Map.
The framework sets out to map the financing of AI: “How the money flows, where it cracks, what it buys, who can absorb it, and what happens when revenue can’t catch up.”
As we read it, Amazon’s quarter is a “how the money flows” data point: capex running ahead of operating cash flow at Amazon, whose cloud is still the largest. The framework was published in May 2026 and does not discuss this quarter.
Update (29 Oct, call): Jassy said on the earnings call that the AWS backlog is $578 billion, growing triple digits year over year, according to a FirstSquawk newswire headline. By our arithmetic, that is about $17 billion, or 3%, more than the $561 billion Google Cloud backlog Alphabet’s CFO gave on 28 October (our piece). He also said Amazon intends to make Trainium available outside of AWS late in 2027, according to a second FirstSquawk headline and an X post quoting the call (our piece on it).
What Is Not Established
The release gives no AWS backlog or remaining performance obligations, and its fourth-quarter guidance section has no AWS line; Jassy’s 2027 and 2028 growth projection is the only AWS forecast in it. Comments on capex and AI on the call came after this piece was written. The multiples, margins and comparisons are our arithmetic from the figures above.
This Week In The AI Supercycle
Execution Fault Lines, Concentrated Demand, and Geopolitical Firewalls
This week’s issue: the AI build is not short of demand for its parts. It is short of cheap money, and its end revenue rests on a narrow base of large, often venture-funded buyers.
Amazon reported AWS sales of $46.0 billion, up 39%, and $77.3 billion of quarterly purchases of property and equipment, which by our arithmetic is about 1.8 times the quarter’s operating cash flow.
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A note on sourcing. All Amazon figures and quotations come from Amazon’s Q3 2026 earnings release (8-K Exhibit 99.1, filed 29 October 2026), read on 29 October 2026. Azure and Google Cloud figures come from Microsoft’s and Alphabet’s own Q3 filings and releases, as reported in our earlier pieces. Margins, multiples and comparisons are our arithmetic.
Gennaro Cuofano is a CRO and tech executive who has worked in AI since late 2015, starting with bringing NLP, natural-language generation, voice and chatbot products to the marketing industry. His background is in law and finance: he holds a Master's degree in Law and an International MBA with an emphasis on corporate finance (LUISS Business School and the University of San Diego, 2012), and worked as a financial analyst at a real-estate investment firm in San Diego and as an assistant controller. His work focuses on business model strategy, business engineering and, more broadly, structural analysis: how companies make money, read from their own filings. He created FourWeekMBA and leads research there and at The Business Engineer, his newsletter on AI and business strategy, with over 95,000 subscribers and more than 1,000 published analyses. His writing has also appeared on Entrepreneur (for example, How to Digitize a Family Business in Europe) and HackerNoon. Find him on LinkedIn and Substack. See how we source.
