Our History

W. Clement Stone founds an insurance enterprise that would become Combined Insurance Company of America, directly selling supplemental life, accident and health insurance policies to individuals.

Ted Hewitt founds Edwin Shields Hewitt & Associates, a brokerage house focusing on insurance and financial services – they sign Parker Pen as their first client a year later.

Edwin Shields Hewitt & Associates officially becomes Hewitt Associates.

Hewitt introduces "Total Compensation Measurement", the gold standard for comparisons of overall compensation for individuals in different organisations.

Combined International Corporation, the result of a 1982 merger with Ryan Insurance Group, changes its name to Aon Corporation.

Hewitt publishes "Fundamentals of Flexible Compensation" - the go-to book for the industry

Aon is added to Standard & Poor’s 500 index.

Hewitt becomes a publicly traded company.

Hewitt merges with Exult to form the industry leader in HR Business Process Outsourcing.

Aon Re Global and Benfield Group Ltd come together to form Aon Benfield, the largest reinsurance firm in the world.

Aon Centre for Innovation and Analytics (ACIA) is established in Dublin. As the owner of Aon’s Global Risk Insights Platform (GRIP), one of the world’s largest repositories of risk and insurance placement information, the team analyses Aon’s global premium flow. This helps us to identify innovative new products and provide impactful, fact-based market insights on the markets and carriers that provide the best value for our clients.

A merger affecting the entire human capital consulting industry. At the same time the group's global Investment Practice is significantly strengthened with the acquisition of EnnisKnupp. As a combined entity, Aon Hewitt becomes one of the largest providers of investment consulting services in the world.
Aon becomes official sponsor of Manchester United Football Club, the number one sports brand in the world's number one sport.

The Singapore Analytics Centre launches, joining ACIA Dublin colleagues in creating new and compelling analytical-based, actionable solutions that help empower our colleagues, clients and insurers.

Aon Ireland announces partnership with the Irish Women’s Rugby team. The official sponsorship is the first of its kind for the Ireland Women's squad.

Aon relocates its headquarters from Chicago to an iconic building, commonly known as "The Cheesegrater" at the epicentre of London’s insurance world. The strategic shift also moves Aon closer to the Lloyd’s of London insurance market while boosting London’s status as a global financial centre. The 190,000-square-foot vertical campus unites its more than 2,000 employees and reinforces the global connectivity of the firm. Spread across 11 floors, the design supports agile working, collaboration and connectivity to give employees the choice of where and how they work.

Aon completes its acquisition of Stroz Friedberg, nc., a leading global risk management firm based in New York City, with offices across the U.S. and in London, Zurich, Dubai and Hong Kong. The acquisition expands Aon’s world-class cyber risk management and response solutions.

Aon expands its role in Women’s rugby, becoming official sponsor of the Women’s Rugby World Cup 2017, hosted in Ireland.
Aon also announces cut-e and Finaccord acquisitions. As a global leader in online talent assessments, acquiring cut-e enables Aon to expand assessment and selection capabilities into even more situations and geographies, providing even stronger insights and driving improved business performance and reduced volatility for our clients. The combination of Aon Inpoint's global scale in data and analytics with Finaccord's innovative international market research and reports will create opportunities to grow our offering to clients and to continue to develop high-value strategic products.