Aon plc is the second largest insurance broker worldwide, providing risk management, insurance brokerage, reinsurance brokerage, and human capital consulting services to corporations, governments, and individuals across over 120 countries. The company operates through two main segments: Risk Capital (commercial insurance and reinsurance solutions) and Human Capital (health benefits, retirement plans, and talent advisory services). Aon is ranked 300th on the Fortune 500 and serves as a leading professional services firm with approximately 50,000 employees.