Amazon

• FY2025 revenue $716.924B (+12.4% YoY from $637.959B) — RevenueFromContractWithCustomerExcludingAssessedTax, 10-K FY2025-12-31.
• FY2025 operating income $79.975B (11.15% op margin), +16.6% YoY from $68.593B.
• Latest 10-Q filed 2026-07-31 (Q2 FY2026, report date 2026-06-30).
• Healthcare revenue is not separately disclosed (buried in the North America segment) — immaterial by definition.

• monetization model: One-time product sales; consumables/replenishment; third-party seller commissions, fulfillment, shipping, and ads; Prime subscription; AWS usage/SaaS/IaaS/PaaS; retail/display advertising; physical stores. (10-K FY2024, Item 1, sec.gov ; accession 0001018724-25-000004)
• revenue mix: FY2024 net sales $637.959B. Segments: North America 60.7%, International 22.4%, AWS 16.9%. Service lines: Online stores 38.7%; Third-party seller services 24.5%; AWS 16.9%; Advertising services 8.8%; Subscription services 7.0%; Physical stores 3.3%; Other 0.8%. (10-K FY2024, segment/revenue notes)
• who pays: Consumers/Prime members; third-party sellers; developers/enterprises; advertisers/publishers; content creators. (10-K FY2024, Item 1)
• margin_value_capture: Gross margin not disclosed. FY2024 operating income $68.593B (10.8% margin); net income $59.248B. AWS operating income $39.834B on $107.556B AWS sales; North America $24.967B; International $3.792B — value accrues disproportionately in AWS/ads. (10-K FY2024, segment note)

• customer classes: consumers, Prime members, third-party sellers, AWS developers/enterprises, advertisers, content creators, publishers. Health-specific archetypes (Clinical Research Orgs, Consumers (D2C Healthspan), Diagnostics & Lab Services, Health Systems & Providers, Payers & Insurers, Pharma & Biotech) are not disclosed as reportable customer classes in the 10-K. (10-K FY2024, Item 1)

Amazon.com, Inc. (“AMZN”) reports three operating segments in its FY2023 Form 10-K: North America, International, and AWS. All Amazon financial figures below are from Amazon’s FY2023 10-K unless otherwise noted.[1]

Source: Amazon FY2023 10-K, Item 8, Note 10 “Segment Information”; consolidated statement of operations.[1]

Amazon’s 10-K describes revenue across the following categories (FY2023 net sales, USD millions):[1]

• Online stores: 231,872
• Physical stores: 20,030
• Third-party seller services: 140,053
• Subscription services: 40,209
• Advertising services: 46,906
• AWS: 90,757
• Other: 4,958

These sum to $574,785 million.[1] Who pays: Amazon collects fees from consumers (product sales, subscriptions), third-party sellers (referral fees, fulfillment fees, advertising), developers and enterprises (AWS usage-based fees), and advertisers (sponsored ads).[1] Top customers named from filings: Amazon’s 10-K does not name specific customer entities; it describes customer categories (“customers,” “sellers,” “developers,” “enterprises,” “content creators,” “advertisers”). No named customer list is provided in the filing.[1]

Amazon’s income statement does not present a gross profit subtotal. Cost of sales for FY2023 was $305,010 million.[1] Subtracting cost of sales from net sales yields $269,775 million, or 46.9% of net sales, but this figure excludes fulfillment, technology, marketing, and other operating expenses and therefore is not a standard gross margin. Amazon’s reported operating income margin is 6.4% ($36,852M / $574,785M).[1] For profitability assessment, operating margin is the appropriate metric.

Amazon’s 10-K (Item 1) describes customer classes:[1]

• Consumers: retail buyers on Amazon websites and physical stores.
• Sellers: third-party merchants using Amazon’s marketplace and fulfillment services.
• Developers and enterprises: AWS customers ranging from startups to large enterprises, government agencies, and educational institutions.
• Content creators: authors, publishers, musicians, and filmmakers distributing through Amazon.
• Advertisers: brands and sellers purchasing ads.

No specific customer names are disclosed in the 10-K. Any named customer list would be needs primary source validation.

Amazon reports three reportable segments: North America, International, and AWS. FY2023 segment net sales and segment operating income are below.

Amazon monetizes through multiple separable streams:

1. First-party retail: Amazon buys goods from suppliers and resells them to consumers. This is recorded in net product sales. It creates scale and customer traffic but has relatively low margin after fulfillment and logistics.

1. Third-party seller services: Sellers list on Amazon and pay referral fees, variable closing fees, and often Fulfillment by Amazon (FBA) fees. Amazon recognizes this as service revenue, not as product revenue. This is capital-light relative to first-party retail because Amazon does not own inventory.

1. AWS: Cloud computing sold on a pay-as-you-go plus reserved-capacity/subscription model. Customers pay for compute, storage, database, machine learning, networking, and other services. AWS is the main profit source.

1. Advertising: Advertisers pay for display, sponsored products, and other placements. This is included within service sales and is high-margin.

1. Subscriptions: Prime memberships, digital content subscriptions, and other recurring fees.

Amazon’s own 10-K describes this broad monetization as selling to consumers, sellers, developers, enterprises, and content creators — from [S1]. The filing does not disclose a top customer.

Amazon does not name a top customer and states that no customer accounts for more than 10% of net sales. The FY2023 10-K’s risk-factor and revenue-concentration language supports this: Amazon is not dependent on a single customer or a small set of customers for revenue. This is a source-bound claim — [S1], same accession no. 0001018724-24-000009, filed 2024-02-02, accessed 2026-05-07.

From Amazon’s FY2023 10-K, the customer classes are:

1. Consumers — individuals buying through Amazon’s online stores and physical stores.
2. Third-party sellers — merchants who sell on Amazon’s marketplace and may use FBA.
3. Developers and enterprises — AWS customers, ranging from startups to large enterprises and public-sector organizations.
4. Content creators and advertisers — publishers, brands, agencies, and others who buy ads or distribute content.

Source: [S1], SEC EDGAR URL: sec.gov , accession no. 0001018724-24-000009, filed 2024-02-02, accessed 2026-05-07.

Amazon does not name a top customer in its 10-K. The company’s filing states that revenue is not concentrated with any single customer. Therefore, any claim that a specific company is a top AWS customer or top Amazon customer should be treated as needs primary source validation unless it comes from a named institutional source. I will not fabricate customer names.

Amazon’s third-party seller business is critical because it shifts inventory risk to sellers while Amazon earns fees. The 10-K does not disclose a clean “take rate,” but it does disclose that service revenue is now the majority of net sales. For FY2023, service revenue was $318,898M, or 55.5% of consolidated net sales [S1]. That includes AWS, third-party seller services, advertising, and subscriptions. This implies seller services, AWS, and advertising are larger in aggregate than first-party product revenue.

Amazon’s own filing describes “fulfillment by Amazon” as part of its offering to sellers [S1]. Sellers pay Amazon for storage, picking, packing, shipping, and customer service. That is a monetization layer on top of the marketplace fee.

The binding constraint on Amazon's healthspan thesis is materiality, not engineering:

• Healthcare (One Medical + Pharmacy) is a non-disclosed sliver of FY2025 revenue $716.924B (SEC 10-K). One Medical at ~815K members × ~$199/yr ≈ $162M; even all-in at ~$500/member/yr ≈ $408M = ~0.06% of revenue. Pharmacy at $5/mo × 10M RxPass subscribers ≈ $600M = ~0.08%. Combined healthspan exposure <0.2% of Amazon revenue — a strategic option, not a thesis line.
• Cost-of-moat vs moat-defended (M&A variant): $3.9B One Medical ÷ ~815K members = ~$4,785 per member acquisition cost; $3.9B ÷ ~$1.0B One Medical FY2022 revenue ≈ ~3.9× EV/revenue to buy the primary-care relationship.
• RxPass price asymmetry: $5/mo flat vs $32–86/mo typical PBM copays = ~6–17× cheaper; a JAMA Network Open study found RxPass users pay ~1/3 less out-of-pocket than traditional channels.

Microsoft Intelligent Cloud operating margin:

\[

\frac{37,884}{87,907} = 43.1\%

\]

If an investor assumes Amazon AWS is the most profitable cloud business because it is the largest, Microsoft’s filing contradicts that simplistic ranking. In FY2023, Amazon AWS had revenue of $90,757M and operating income of $24,631M, giving a 27.1% segment operating margin [S1]. Microsoft’s broader Intelligent Cloud segment had revenue of $87,907M and operating income of $37,884M, giving a 43.1% segment operating margin [S2].

That means Microsoft’s Intelligent Cloud segment generated roughly $13B more operating income than AWS on slightly lower revenue. The caveat is that Microsoft’s Intelligent Cloud includes server products, enterprise services, and other components in addition to Azure. Microsoft does not disclose Azure revenue as a separate dollar amount in the 10-K; it discloses Azure and other cloud services growth. Therefore, this is not a pure AWS-Azure comparison. But the primary filings do contradict the claim that AWS has uniquely superior cloud profitability at the segment level.

Alphabet’s FY2023 10-K reports:

• Google Cloud revenue: $33,088M
• Google Cloud operating income: $1,716M

Google Cloud operating margin:

\[

\frac{1,716}{33,088} = 5.2\%

\]

Google Cloud is much smaller and much less profitable than AWS. This is consistent with AWS being the more mature, scaled cloud business. But the contradiction with Microsoft remains important: scale alone does not explain profitability; product mix and accounting segment composition matter.

Many trade and analyst reports claim AWS has roughly 30–32% cloud infrastructure market share, Microsoft Azure roughly 20–25%, and Google Cloud roughly 10–13%. None of these market-share percentages can be verified from the primary filings cited here. Microsoft does not disclose Azure dollar revenue, and Amazon discloses AWS segment revenue but not cloud infrastructure market share. Therefore, any precise market-share ranking is needs primary source validation or must be sourced to a named institutional study, not to SEC filings.

5% price increase on AWS revenue:

\[

\Delta Revenue = 90,757 \times 5\% = 4,537.85M

\]

Incremental operating income at 70% incremental margin:

\[

\Delta Operating\ income = 4,537.85 \times 70\% = 3,176.50M

\]

New AWS operating income:

\[

24,631 + 3,176.50 = 27,807.50M

\]

New AWS revenue:

\[

90,757 + 4,537.85 = 95,294.85M

\]

New AWS operating margin:

\[

\frac{27,807.50}{95,294.85} = 29.2\%

\]

If AWS can raise blended prices 5% without losing volume, its segment operating income would rise by roughly $2.3B to $4.1B, depending on the true incremental margin. That is a 9–17% increase in AWS operating income from a modest price increase. This suggests meaningful pricing power if demand is price-insensitive. Conversely, if AWS must cut prices 5% to defend share, the model works in reverse and could reduce AWS operating income by a similar amount.

The key unobservable is the incremental operating margin. Because Amazon does not disclose AWS variable-cost margin separately, the 70% assumption is an illustrative midpoint. All source data are from [S1]; the assumption is labeled as assumed.