Aon plc (NYSE: AON) is a leading global professional services firm providing a broad range of risk, retirement, and health solutions. Successor to the combined strengths of Aon and Hewitt Associates (Aon Hewitt), the company leverages proprietary data and analytics to deliver insights that reduce volatility and improve performance for clients. Aon empowers organizations and individuals to secure a better future through innovative and effective solutions in areas such as commercial risk, reinsurance, human capital, health and benefits, and wealth management.
Serves as the registered global headquarters, overseeing legal and corporate governance for the multinational firm. Operational leadership and strategy are largely driven from London and other key global hubs.
While the Dublin office is the registered HQ, Aon's London office in The Leadenhall Building (often called 'The Cheesegrater') is a more visually prominent and operationally central executive hub.
Aon promotes a client-centric, collaborative, and inclusive work culture. There's a strong emphasis on expertise, data-driven decision-making, and delivering impactful solutions for clients worldwide.
The Dublin headquarters signifies Aon's status as a global corporation with a strategic European base. The London executive offices place it at the heart of a major global financial and insurance market.
Aon operates in over 120 countries and sovereignties worldwide, supporting clients with a broad spectrum of functions. These include global risk management and insurance brokerage, reinsurance solutions, human capital consulting (including talent, rewards, and performance), health and benefits consulting and administration, retirement and investment consulting, and data & analytics services. This extensive network enables Aon to deliver localized expertise with a global perspective.
Metropolitan Building, James Joyce Street (Registered Office)
Dublin
D01 K0Y8
Ireland
Address: The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, UK
Serves as the command center for many global operations, client strategy, and innovation, particularly within the EMEA region and globally for certain solution lines.
Address: 200 E Randolph St, Chicago, IL 60601, USA (Aon Center)
Key center for serving North American clients, driving innovation, and housing significant talent in data analytics and consulting services.
Address: 2 Shenton Way, #25-01 SGX Centre 1, Singapore 068804
Drives growth and client service delivery across Asia Pacific, tailoring global solutions to local market needs and regulations, and tapping into regional talent.
Address: 1 Overlook Point, Lincolnshire, IL 60069, USA
Serves as a key hub for North American operations, client support, and technology development for health and retirement solutions.
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As of April 2025, Aon' leadership includes:
Aon has been backed by several prominent investors over the years, including:
Aon has seen strategic appointments to bolster its operational and solution line leadership, alongside planned transitions reflecting long-term succession planning. Key focus areas include enhancing digital capabilities and strengthening regional leadership.
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Aon commonly uses the 'first.last@aon.com' email format for its employees globally. While minor variations or legacy formats (e.g., from acquired companies like Hewitt) might exist in specific cases, this is the standard structure for professional communication.
first.last@aon.com
Format
john.smith@aon.com
Example
90%
Success rate
Aon Newsroom • May 10, 2024
Aon plc announced that Edmund Reese will join the firm as Chief Financial Officer, effective July 1, 2024, succeeding Christa Davies, who will certify second quarter 2024 results and then transition to a role as a senior advisor to the CEO....more
Aon Newsroom • April 26, 2024
Aon plc reported its financial results for the first quarter of 2024, highlighting 5% organic revenue growth and continued progress on its Aon United strategy....more
Aon Newsroom • December 20, 2023
Aon announced it has signed a definitive agreement to acquire NFP, a leading middle-market property and casualty broker, benefits consultant, wealth manager, and retirement plan advisor. The acquisition is aimed at expanding Aon's presence in the large and fast-growing middle-market segment....more
Aon Newsroom • May 22, 2023
Aon plc announced that Mindy Simon has been named the firm's new chief operating officer. In this role, Simon is responsible for leading Aon Business Services, the firm's global operations platform....more
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