Dublin, Ireland-based Aon plc (AON) is a multinational professional services firm that serves as a premier provider of risk management, insurance and reinsurance brokerage, and human resources consulting. Valued at a market cap of $67.4 billion, the company delivers data-driven solutions to corporate, institutional, and commercial clients to reduce operational volatility and optimize workforce performance.
Companies valued at $10 billion or more are typically classified as “large-cap stocks,” and AON fits the label perfectly, with its market cap exceeding this threshold, underscoring its size, influence, and dominance within the insurance brokers industry. The company's primary competitive strength lies in its massive, highly integrated global distribution network and its "Aon United" operating model, which allows it to seamlessly deliver cross-functional risk and human capital solutions across global regions without internal operational friction.