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Aon's Overview

Total employees50000
HeadquartersDublin
Founded1982

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.

Where is Aon's Headquarters?

HQ Function

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.

Notable Features:

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.

Work Culture:

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.

HQ Significance:

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.

Values Reflected in HQ: Global integration, strategic positioning within key markets, and commitment to long-term growth and client service are reflected in its headquarters choices.

Location:

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.

Street Address:

Metropolitan Building, James Joyce Street (Registered Office)

City:

Dublin

State/Province:

D01 K0Y8

Country:

Ireland

Aon's Global Presence

London, United Kingdom

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.

Chicago, Illinois, USA

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.

Singapore, Singapore

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.

Lincolnshire, Illinois, USA

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.

Buying Intent Signals for Aon

Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.

Notable news
Hiring actively
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
*Example signal, not calculated in real time

Executive Team of Aon

As of April 2025, Aon' leadership includes:

Gregory C. Case - Chief Executive Officer
Christa Davies - Chief Financial Officer
Eric Andersen - President
Mindy Simon - Chief Operating Officer
Lisa Stevens - Chief People Officer and Head of Global Human Capital Solutions
Andy Marcell - CEO, Risk Capital and CEO, Reinsurance Solutions

Investors of Aon

Aon has been backed by several prominent investors over the years, including:

The Vanguard Group, Inc.
BlackRock, Inc.
Capital World Investors
State Street Corporation
FMR LLC (Fidelity)
WCM Investment Management, LLC

Executive New Hires/Exits in the Last 12 Months

Hire2
Exits1

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.

Departures

Christa Davies, Christa Davies to transition from CFO to Senior Advisor role post Q2 2024 financial certification.

New Appointments:

Mindy Simon, Mindy Simon appointed as Aon's new Chief Operating Officer to drive operational excellence.
Edmund Reese, Edmund Reese named as the successor to Christa Davies as Chief Financial Officer, effective upon her transition.

Technology (Tech Stack) used by Aon

Discover the tools Aon uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.

Aon Email Formats and Examples

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

News and media

Aon NewsroomMay 10, 2024

Aon Names Edmund Reese Chief Financial Officer

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 NewsroomApril 26, 2024

Aon Reports First Quarter 2024 Results

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 NewsroomDecember 20, 2023

Aon to Acquire NFP, a Leading Middle Market Property and Casualty Broker, Benefits Consultant, Wealth Manager and Retirement Plan Advisor

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 NewsroomMay 22, 2023

Aon Names Mindy Simon Chief Operating Officer

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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