Aon
Aon is a global professional services firm that specializes in risk, reinsurance, retirement, and health solutions. Founded in 1982 through the merger of Ryan Insurance Group and Combined International Corporation, Aon has grown to employ over 66,000 people across 120 countries. The company's name, derived from a Gaelic word meaning "one," reflects its unified approach to client service. Aon offers a wide range of services, including commercial risk solutions that help businesses manage risk exposure, reinsurance solutions for insurers and reinsurers, retirement consulting to optimize outcomes in volatile markets, and health solutions aimed at improving employee wellbeing. The firm serves a diverse clientele, including businesses, insurers, and fiduciaries, utilizing proprietary data and analytics to enhance performance and manage uncertainty. Aon's growth strategy has involved numerous acquisitions, positioning it as a leading insurance brokerage and consulting company worldwide.
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Headcount trend
Aon went from 29,460 employees in Jul 2023 to 32,334 in Jun 2025. Last 6 months: 1,845 people joined, 863 left.
Org structure
Headcount by department
Executive compensation
Salaries at Aon
All salaries95 salary profiles in the US
Most reported roles
H-1B sponsorship
The department split adds up all the years listed above. FY2026 alone: 32 filings.
Peer reviews
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Aon FAQ
How many employees does Aon have?
Aon has about 32,334 employees, up 0.9% over the last 3 months (as of Jun 2025).
Does Aon sponsor H1B visas?
Yes. Aon filed 32 H1B (LCA) applications in FY2026, according to the latest U.S. Department of Labor disclosures. Most of them were for Engineering roles.
What is Aon's revenue per employee?
Aon makes about $506K in revenue per employee, based on $16.36B annual revenue and 32,334 employees.
How much does Aon pay?
6figr has 3,778 salary profiles for Aon in India and 95 in the US, with pay broken down by role, level and gender on the Aon salaries page. See Aon salaries in India
Is Aon a public company?
Yes. Aon is publicly traded under the ticker AON on NASDAQ.
Data from Company Prospectus, DOL LCA disclosures, WARN notices and 6figr salary profiles. Updated 11 Oct 2026.