Aon plc (AON) Stock

Understand Aon plc: how it makes money

Aon is a global risk, health, and wealth advisor that earns brokerage and advisory fees from corporations, institutions, and individuals buying insurance and benefits. Revenue is dominated by Risk Capital at 83% of the total, while Health and Wealth form a smaller, steadier second leg.

Aon earns a percentage fee on the insurance premiums and benefits spend flowing through its books, so top-line growth tracks the size of its clients' risk and health budgets more than the fee rate itself.

Business quality (Solid): Solid fee-based franchise with a 21.5% operating margin and 35% ROE, though the 22.3x P/E sits 70% above the 13x insurance-sector average.

Valuation: At 22× earnings, AON trades 70% above the Insurance average (13×).

Bull case

• Nine Quarters of New-Business Momentum: Management reports new business has contributed 9-11 points of organic growth for nine consecutive quarters, a streak that signals the fee engine is consistently picking up weight across Commercial Risk and Reinsurance.
• Structural Cost Savings Compound: ABS restructuring savings are tracking toward $100 million in 2026 and $450 million by 2027, which would lift the 21.5% operating margin if revenue growth even modestly outpaces the run-off of legacy obligations.

Bear case

• Reinsurance Pricing Turns Against Aon: Treaty reinsurance rates were 15%-20% lower in the quarter, and management acknowledged volume growth could not fully offset the rate compression, putting pressure on the segment that feeds the Risk Capital revenue base.
• Rate Sensitivity Hits Fiduciary Income: Fiduciary investment income fell 12% as lower rates outweighed higher average balances, a headwind that will persist until long-term yields firm meaningfully and is not addressed by the cost-reduction program.
• Valuation Leaves Little Cushion: At a 22.3x P/E versus a 13x insurance-industry average, Aon trades 70% above peers, meaning the market already embeds the margin-expansion and data-center-growth narrative and leaves little room for execution missteps.

Aon plc earnings call transcripts

• AON Q2 FY26 earnings call transcript (reported 2026-07-29) · analysis
• AON Q4 FY25 earnings call transcript (reported 2026-01-30) · analysis
• AON Q3 FY25 earnings call transcript (reported 2025-10-31) · analysis
• AON Q2 FY25 earnings call transcript (reported 2025-07-25) · analysis

All AON earnings calls

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