Aon: CEO History

Aon plc (NYSE: AON) is a premier global professional services and risk advisory institution, advising corporate and institutional clients in over 120 countries across commercial insurance broking, reinsurance intermediation, workforce health, and retirement solutions. Legally incorporated in Dublin, Ireland, with principal operational headquarters in London and Chicago, Aon employs over 60,000 colleagues worldwide. Aon operates an asset-light, fiduciary advisory business model: rather than bearing balance-sheet risk by underwriting insurance policies and paying out catastrophe losses, Aon acts as the vital strategic intermediary between corporate insurance buyers, primary insurers, and global reinsurance syndicates. Under the 20-year leadership of Chief Executive Officer Greg Case, Aon has unified its global operations under 'Aon United' and the Aon Business Services technology platform. In FY2024, following its landmark $13.0 billion acquisition of middle-market broker NFP, Aon generated $13.40 billion in consolidated revenue, operating margins exceeding 30%, and produced over $3.2 billion in free cash flow.

Aon operates a highly profitable, cash-generative professional advisory business model organized into two strategic capital categories: (1) Risk Capital (~60% of revenue), encompassing Commercial Risk Solutions (retail commercial insurance broking, cyber risk, trade credit, and captive management) and Reinsurance Solutions (treaty and facultative reinsurance broking and catastrophe bond structuring); and (2) Human Capital (~40% of revenue), encompassing Health Solutions (corporate employee health and benefits brokerage) and Wealth Solutions (pension actuarial consulting, investment advisory, and delegated OCIO asset management). Aon earns recurring commissions on commercial insurance premiums, transactional brokerage fees on reinsurance placements, and hourly retainer or basis-point advisory fees on health and pension assets. Supported by Aon Business Services (a centralized global technology and operational infrastructure), Aon operates with software-like adjusted operating margins exceeding 30% and incurs zero underwriting balance-sheet risk.