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AWS Cloud FranchiseWide moat
Amazon (AMZN) — moat facet
AWS invented the cloud, earned 63% of Amazon's operating profit in the September quarter on 23% of its revenue, and is growing at its fastest pace in nearly five years.
Amazon Web Services is the quiet giant of the company — the profit engine humming beneath the retail operation that most customers never see and never think about. Having essentially invented the modern cloud-computing business, Amazon enjoyed a head start measured not in months but in years, and it used that head start to build a lead in scale, in the breadth of its services, and in the trust of the enterprises that came to run their businesses on top of it. It is the best business the company owns, and it is not particularly close.
The scale is now enormous and still accelerating. In the third quarter of 2026 AWS grew 39% to a $184 billion annual run rate, its fastest growth in nearly five years1, and the token volume running through its Bedrock model platform grew nearly seventeenfold in a year2. It earned 57% of Amazon's operating profit in 2025 on 18% of its revenue, and 63% on 23% in the third quarter of 20263, which is why the health of AWS matters more to the whole enterprise than any other single number.
The deepest part of the moat is the switching cost. Once a company has built its software to run on AWS — using its particular services, its data stores, its security model, its way of doing things — migrating elsewhere becomes a costly, risky, and disruptive project that few enterprises undertake without a compelling reason. The customer's own engineers become fluent in AWS; the applications become entangled with it; and the data, accumulating into the petabytes, grows expensive and slow to move. The result is revenue that is sticky in the extreme.
Reinforcing the lock-in is the sheer breadth of the service catalog. AWS offers such an enormous and ever-growing range of computing tools — databases, analytics, machine learning, storage, and hundreds of others — that a customer can build almost anything without ever leaving the platform. Increasingly that breadth extends down into the silicon itself: Amazon's own Trainium chips, which it says offer materially better price-performance than the standard alternatives, give AWS a lever on the cost of AI that rivals renting someone else's chips do not have.
Underlying it all is the economics, which are the reason AWS matters so much to the whole enterprise. The cloud business earns fat margins where the retail business earns thin ones, and those profits fund the reinvestment, the experiments, and the price wars that power everything else Amazon does. AWS is not merely a good business bolted onto a retailer; it is the financial engine that makes the retailer's relentless, margin-crushing reinvestment possible in the first place — which is the surest sign of how central it truly is.
Widening. AWS is the profit engine that funds all of Amazon, and it accelerated for a sixth straight quarter to 39% growth in September on a $184 billion run rate, with $496 billion of contracted future business at its last disclosure, much of it from two AI laboratories. Management has guided growth above 40% for both 2027 and 2028. High switching costs, the broadest set of services and scale economics keep enterprise customers spending more, and Amazon's own Trainium chips cut the cost of serving them. The one to watch is that Azure and Google Cloud both grew faster again, but AWS's franchise is still clearly widening.
AWS earned $17.8B of the quarter's $28.1B of operating income, and 58.5% of the trailing twelve months'. The share is what makes the whole company's profit a cloud story; a share falling because retail margins rose would be healthy, one falling because AWS margins fell would not.
- ReportedIn the third quarter of 2026 AWS grew 39% to a $184 billion annual run rate, its fastest growth in nearly five years, and the token volume running through its Bedrock model platform grew nearly seventeenfold in a year.Amazon.com, third-quarter 2026 results release (Form 8-K, Exhibit 99.1) — net sales $201,944M (+12%, +13% excluding a $0.9B unfavorable foreign-exchange impact), operating income $28,076M (+61%) at a 13.9% operating margin, described in the release's own headline as Amazon's highest operating margin ever; net income $20,685M and diluted EPS $1.89, both lower than the $21,187M and $1.95 of third quarter 2025, which the release attributes primarily to $9.5B of pre-tax gains on the investments in Anthropic recorded in that earlier quarter; total non-operating expense of $1,207M in the quarter (interest income $1,187M, interest expense $1,691M against $538M, other expense $703M) against non-operating income of $10,748M a year earlier; segment results North America net sales $112,852M (+6%) and operating income $8,723M (7.7% margin against 4.5%), International $43,108M (+5%, +8% excluding currency) and $1,580M (3.7% against 2.9%, +42% excluding currency), AWS $45,984M (+39%, its fastest growth in nearly five years, a $184 billion annualised revenue run rate) and $17,773M (38.7% margin against 34.6%); net sales mix North America 56%, International 21%, AWS 23%; the Prime Day timing shift, with the event in the second quarter this year for most large countries and entirely in the third quarter in 2025, without which third-quarter growth would have been approximately 400 basis points higher; net sales by product line online stores $68,470M (+2%), third-party seller services $46,492M (+9%, +10% excluding currency), advertising services $19,637M (+11%, +12% excluding currency, after 22% excluding currency in each of Q2 2025, Q3 2025, Q4 2025 and Q1 2026 and 26% in Q2 2026), subscription services $14,006M (+11%), physical stores $5,710M, other $1,645M; worldwide shipping costs $28,295M (+11%) against worldwide paid unit growth of 12% and a seller unit mix of 61%; employees 1,638,000 (+4%); trailing-twelve-month net sales $797,455M, operating income $104,366M at a 13.1% margin, net income $134,779M and diluted EPS $12.37, operating cash flow $168,300M (+29%), purchases of property and equipment net of proceeds $210,657M (+82%) and free cash flow of minus $42,357M against plus $14,788M a year earlier, with the supplemental table's trailing free-cash-flow series $18,184M, $14,788M, $11,194M, $1,232M, minus $7,604M and minus $42,357M for Q2 2025 to Q3 2026 and North America's trailing operating margin at 8.2%; purchases of property and equipment of $77,259M in the quarter and $175,670M in nine months; nine-month other income of $68,359M and a $78,788M pre-tax change in net unrealized gains on available-for-sale debt securities recorded in other comprehensive income; proceeds from long-term debt of $48,102M in the quarter and $115,100M in nine months, taking long-term debt from $65,648M at December 31, 2025 to $173,125M, total assets from $818,042M to $1,243,390M and other assets from $122,607M to $358,775M; Andy Jassy's statement of projected AWS revenue growth rates “of over 40% both in 2027 and in 2028”; and fourth-quarter 2026 guidance of $240.0-247.0B of net sales (+12% to +16%) and $28.5-33.5B of operating income against $25.0B, with 2026 cash capital expenditures still expected to be approximately $220 billion and fourth-quarter advertising revenue expected to grow in the high teens — Q3 2026 — quarter ended September 30, 2026 · publ. October 29, 2026 · source ↗
- ReportedIn the third quarter of 2026 AWS grew 39% to a $184 billion annual run rate, its fastest growth in nearly five years, and the token volume running through its Bedrock model platform grew nearly seventeenfold in a year.Amazon.com, third-quarter 2026 results release (Form 8-K, Exhibit 99.1) - Highlights: AWS “Drove continued rapid growth for Amazon Bedrock, AWS's inference service, with Fortune 500 companies spending nearly 7x more year-over-year and total Bedrock token volume growing nearly 17x year-over-year”, and expanded Bedrock's model selection with OpenAI's GPT-6 family, Anthropic's Claude Fable 5.1, Opus 5.5, Sonnet 5.5 and Haiku 5.5, Moonshot AI's Kimi K3, SpaceXAI's Grok 4.7 and Z.ai's GLM 5.3 — Q3 2026 - quarter ended September 30, 2026 · publ. October 29, 2026 · source ↗
- Moat Explorer calcIt earned 57% of Amazon's operating profit in 2025 on 18% of its revenue, and 63% on 23% in the third quarter of 2026, which is why the health of AWS matters more to the whole enterprise than any other single number.Moat Explorer calculation from Amazon's third-quarter 2026 results release and Form 10-K segment tables: AWS share of consolidated operating income = $45,606M / $79,975M = 57.0% for 2025, $17,773M / $28,076M = 63.3% in Q3 2026 and $61,020M / $104,366M = 58.5% over the twelve months to September 2026; AWS share of net sales = $128,725M / $716,924M = 18.0% for 2025, $45,984M / $201,944M = 22.8% in Q3 2026 and $161,382M / $797,455M = 20.2% trailing; North America segment operating margin = minus $2,847M / $315,880M = minus 0.9% in 2022 against the 8.2% trailing margin the Q3 2026 supplemental table reports; the increase in other assets = $358,775M less $122,607M = $236,168M; AWS revenue per quarter rising 17%, 20%, 24%, 28%, 37% and 39% excluding currency across Q2 2025 to Q3 2026; and shipping-cost growth of 11% against paid-unit growth of 12% in Q3 2026, one point of volume growth above cost — FY2022 — Q3 2026 · publ. 2026 · source ↗
- Amazon Form 10-K filings — Business & Risk Factors (SEC EDGAR)
- Amazon investor relations — quarterly results & filings