Aon’s recurring, capital-light franchise is temporarily discounted by USI leverage, creating substantial long-term upside if integration, deleveraging, and synergy capture meet plan.
Overview
Aon is a global professional-services intermediary operating across Risk Capital and Human Capital in more than 120 countries. Its capital-light model earns recurring commissions, retainers, and advisory fees from commercial brokerage, reinsurance, benefits, pension, and investment consulting, with customer retention above 95%. Scale, carrier access, embedded analytics, and the ABS platform create a durable competitive position alongside Marsh McLennan. Q2 2026 showed resilient execution: revenue was $4.25 billion, organic growth was 5%, adjusted operating margin expanded 70 basis points to 28.9%, adjusted EPS was $3.81, and free cash flow was $483 million. Management reaffirmed mid-single-digit or greater organic growth and 70–80 basis points of 2026 margin expansion. **The central near-term issue is leverage from the $17.0 billion USI acquisition**, which drove the stock to $307.77 and suspended buybacks while debt is repaid. **The valuation opportunity rests on a roughly 18.0x trailing P/E and successful synergy-led deleveraging.** Key catalysts are USI closing, $395 million of annual synergies, progress toward 2.8x–3.0x leverage, and stable commercial P&C pricing.