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AON · Financial Services · Insurance - Brokers · Market cap $66.98B

4 funds in our archive have pitched Aon — most recently Diamond Hill Select Fund in March 2026.

Company profile

Aon plc is a global professional services firm that delivers expert advice and innovative solutions across the key areas of risk, retirement, and health. Its comprehensive commercial risk offerings include retail brokerage, cybersecurity consulting, global risk management strategies, and the administration of captive insurance programs. For health-related needs, Aon provides brokerage services for benefits and operates health care exchanges. The company is also active in the capital markets, specializing in treaty and facultative reinsurance, insurance-linked securities, and corporate finance advisory services such as capital raising, strategic guidance, restructuring, and mergers and acquisitions support. Additionally, Aon consults on the design and management of retirement programs, furnishes actuarial services, and advises on investment strategies for a wide array of plan types, including defined benefit and defined contribution plans, endowments, and foundations, for both public and private sector clients. The firm further extends its services through specific brands like CoverWallet, Affinity, Aon Inpoint, and ReView. Established in 1919, Aon plc's corporate headquarters are located in Dublin, Ireland.

Fund coverage · 4 theses

  • Diamond Hill Select Fund
    March 2026

    Aon is a leading insurance broker with high barriers to entry, switching costs, and an attractive growth profile.

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  • Ironvine Capital Partners
    December 2025

    Aon is a capital-light, market-leading insurance broker with recurring fees, structural tailwinds, and rising free cash flow supported by restructuring and buybacks.

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  • Polen Focus Growth
    March 2025

    Aon is a leading global insurance brokerage house with strong competitive advantages, stable revenue streams from non-discretionary business insurance, and expected mid-to-high single-digit revenue growth.

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  • Diamond Hill Large Cap Concentrated Fund
    December 2024

    Aon is a leading global insurance broker with steady growth

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