AONQueued from the May 25, 2026 S&P 500 market-cap snapshot ranks 151-175; market data reviewed against late-May 2026 public market sources.

Aon

Aon provides commercial risk, reinsurance, health, wealth, and retirement advisory services to clients worldwide.

CompaniesMarketCap Product analyses

Metadata

Where this company sits

Ticker: AON
Rank snapshot: ≈ 163
Sector: Financials
Industry: Insurance Brokers
Region: United States
Index: S&P 500 · Top 175 by market cap

Metrics

Scoring view

Every metric is paired with a short rationale. The numbers are deliberate, not divine.

Moat

78.0/10

Aon has a strong relationship, data, market-access, and regulated-advisory moat in commercial insurance and reinsurance brokerage, but some analytics and placement workflows can be pressured by open models and transparent data standards.

Decentralizability

42.0/10

Risk analytics, exposure data, parametric triggers, and smaller mutual pools are decentralizable, while enterprise insurance procurement, licensed advice, carrier solvency, and claims handling remain institution-heavy.

Profitability

82.0/10

Aon reported strong 2025 profitability, including about $17.2 billion of revenue, about $3.7 billion of net income, 32.4% adjusted operating margin, and about $3.2 billion of free cash flow.

Price / Earnings

17.8x

StockAnalysis reported Aon's trailing P/E ratio at 17.83 for the May 22, 2026 market close.

Market cap

$67.0B

Macrotrends reported Aon's market capitalization at about $66.97 billion as of May 21, 2026; other late-May 2026 sources clustered around roughly $69 billion.

Freed-up capital potential

$0.0

Derived from market cap, moat resistance, decentralizability, and profitability. It is a directional estimate of value capture that could come under pressure if open alternatives compound.

Narrative

Why the company matters

A short editorial overview plus the current thesis on moat strength and decentralization pressure.

Risk and human capital advisor

Aon is a global professional services firm built around risk capital and human capital advice. Its largest revenue pools are commercial risk brokerage and consulting, reinsurance brokerage, health benefits, wealth, retirement, and related data and analytics services.

The business monetizes expert advice, insurer and reinsurer market access, client relationships, proprietary data, and placement workflows rather than underwriting risk directly.

Brokerage scale

Aon's 2025 reporting shows Commercial Risk Solutions revenue of about $8.5 billion and Reinsurance Solutions revenue of about $2.8 billion, making risk placement and reinsurance advice the core competitive surfaces for decentralization analysis.

The company also reports strong cash generation and adjusted operating margins, indicating a durable intermediary model with meaningful pricing power and operating leverage.

Moat reading

Aon's moat comes from global client relationships, insurer and reinsurer distribution access, regulated placement expertise, claims and risk advisory capabilities, proprietary data, and the trust required for high-stakes corporate insurance decisions.

Its position is not a simple software monopoly: large enterprise clients still need human judgment, market negotiation, compliance support, and balance-sheet access from carriers. That makes the moat resilient, though not immune to open risk models, transparent data standards, and more direct capital-market risk transfer.

Decentralization reading

Insurance brokerage is only partly decentralizable. Risk modeling, exposure data normalization, parametric triggers, and some marketplace coordination can move toward open standards and shared infrastructure, but licensed advice, claims disputes, carrier solvency, and complex enterprise procurement remain difficult to replace with purely peer-to-peer systems.

The most plausible decentralization pressure is not a full Aon replacement. It is margin compression in standardized risk analytics and reinsurance placement where open catastrophe models, transparent exposure data, mutual pools, and automated parametric settlement make parts of the broker workflow less proprietary.

Products

Where the moat actually touches users

These pages zoom into the products and services that matter most to each company, the alternatives already nibbling at them, and 3 structured disruption concepts across the current product set.

3 disruption concepts tracked0 documented exceptions

Commercial Risk Solutions

Commercial insurance brokerage and risk advisory

1 concept

Aon's Commercial Risk Solutions segment helps organizations identify, model, place, and manage commercial insurance and enterprise risk.

Open analysis

Reinsurance Solutions

Reinsurance brokerage and capital advisory

2 concepts

Aon's Reinsurance Solutions business advises insurers, reinsurers, and capital providers on risk transfer, catastrophe exposure, reinsurance placement, and insurance-linked securities.

Open analysis

Technology waves

Strategic lenses

These are the repo's explicit bias terms: the technologies expected to keep making incumbents less inevitable over time.

Bitcoin and Lightning as coordination rails

Proof-of-work economics, programmable payment flows, and anti-spam pricing make more digital systems capable of rewarding signal while resisting abuse.

• Platforms that monetize gatekeeping could face pressure from protocol-native payment and reputation layers.
• Micropayments can replace some ad-funded or subscription-heavy distribution models.
• Open systems with credible anti-spam economics deserve a higher decentralizability score than legacy software assumptions suggest.

Paper trail