Where is Aon headquartered?
In Chicago, United States (Aon Center).
Aon plc is a global professional services firm headquartered in Chicago, United States. Established over 100 years ago, Aon operates through a wide network of subsidiaries, with a total of 1,509 entities worldwide. This ownership information comes from CompanyData.com’s verified corporate hierarchy database, which covers more than 380 million companies globally.
Aon has 1,509 subsidiaries across 69 countries, with 775 in the United States (51.3%), 92 in Canada (6.1%), and 158 in the United Kingdom (10.5%). Together, these three countries account for nearly 68% of Aon’s worldwide subsidiaries, supporting its services across risk management, insurance brokerage, and consulting industries.
List of Aon subsidiaries
Company Hierarchy
| Company | Location | Founded | Employees | Revenue (USD) | Legal Type | CEO | Website | Category Code | Category Description | # in Group | Local HQ Name | Local HQ City | Local HQ Country | National HQ Name | National HQ City | Global HQ Name | Global HQ City | Global HQ Country | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Aon Public LIMITED CompanyAon Public LIMITED CompanyGlobal Headquarter | Dublin, Ireland | 2017 | 57,924 | $15.7B | Corporation | Richard Carlier Notebaert | aon.com/ireland | 6411 | Insurance Agents, Brokers, and Service | 1568 | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | AON PUBLIC LIMITED COMPANY | DUBLIN | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||
Dlh Associated LLCDlh Associated LLCNational HQ | Onancock, USA | 2015 | 3 | $278K | Corporation | Brian C Purcell | associatedinsurance.net | 6411 | Insurance Agents, Brokers, and Service | 1740 | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | DLH ASSOCIATED LLC | ONANCOCK | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||
Aon Risk Services Ecuador S.A. Agencia Asesora Productora De SegurosAon Risk Services Ecuador S.A. Agencia Asesora Productora De SegurosNational HQ | Quito, Ecuador | 2004 | 18 | $4.0M | Corporation | Paz Y Miño Rodriguez Byron Javier | 6411 | Insurance Agents, Brokers, and Service | 1568 | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | Aon Risk Services Ecuador S.A. Agencia Asesora Productora de Seguros | Quito | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | |||
Self Funding INCSelf Funding INCNational HQ | Buffalo, USA | 1996 | 4 | $288K | Corporation | Mike Kerwin | selffundinginc.com | 6411 | Insurance Agents, Brokers, and Service | 1740 | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | SELF FUNDING INC | BUFFALO | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||
Aon Bolivia Corredores De SeguroAon Bolivia Corredores De SeguroNational HQ | La Paz, Bolivia | 8 | $273K | Jose Luis Contreras | 7389 | Business Services, Not Elsewhere Classified | 1568 | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | Aon Bolivia Corredores de Seguro | La Paz | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | |||||
Randolph Finance Unlimited CompanyRandolph Finance Unlimited CompanyLocal HQ | Dublin, Ireland | 2014 | 20 | $2.7B | Corporation | Robert Lee | 6159 | Miscellaneous business Credit Institutions | 1568 | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | AON PUBLIC LIMITED COMPANY | DUBLIN | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | |||
Driftbrook Unlimited CompanyDriftbrook Unlimited CompanyLocal HQ | Dublin, Ireland | 2020 | 4 | $712K | Corporation | Robert E. Lee | 6719 | Offices of Holding Companies, Not Elsewhere Classified | 1568 | RANDOLPH FINANCE UNLIMITED COMPANY | DUBLIN | Ireland | AON PUBLIC LIMITED COMPANY | DUBLIN | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | |||
Aon Global Operations Holdings S.A R.L.Aon Global Operations Holdings S.A R.L.National HQ | Luxembourg, Luxemburg | 2023 | 4 | $712K | Corporation | Sophie Vandeven | 6719 | Offices of Holding Companies, Not Elsewhere Classified | 1568 | DRIFTBROOK UNLIMITED COMPANY | DUBLIN | Ireland | Aon Global Operations Holdings S.a r.l. | LUXEMBOURG | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | |||
Aon Global Operations Luxembourg S.A R.L.Aon Global Operations Luxembourg S.A R.L.Local HQ | Luxembourg, Luxemburg | 2019 | 4 | $712K | Corporation | Sophie Vandeven | 6719 | Offices of Holding Companies, Not Elsewhere Classified | 1568 | Aon Global Operations Holdings S.a r.l. | LUXEMBOURG | Luxemburg | Aon Global Operations Holdings S.a r.l. | LUXEMBOURG | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | |||
Aon Global Operations PLCAon Global Operations PLCNational HQ | City of London, Unitedkingdom | 2012 | 30 | $5.6M | Corporation | Dominic Patrice Nicolas Mignon | aon.com/unitedkingdom | 6712 | Offices of Bank Holding Companies | 1568 | Aon Global Operations Luxembourg S.a r.l. | LUXEMBOURG | Luxemburg | AON GLOBAL OPERATIONS PLC | LONDON | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||
Aon Singapore Center For Innovation Strategy And ManagementAon Singapore Center For Innovation Strategy And ManagementNational HQ | Singapore, Singapore | 2012 | 11 | $172.1M | Corporation | Camerieri Christopher | aon.com/singapore | 8742 | Management Consulting Services | 1568 | AON GLOBAL OPERATIONS PLC | LONDON | England | AON SINGAPORE CENTER FOR INNOVATION STRATEGY AND MANAGEMENT | SINGAPORE | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||
Aon Global Operations SE Singapore BranchAon Global Operations SE Singapore BranchNational HQ | Singapore, Singapore | 2012 | $993.5M | Alistair Patrick Boyd | aon.com/singapore | 8741 | Management Services | 1568 | AON GLOBAL OPERATIONS PLC | LONDON | England | AON GLOBAL OPERATIONS SE SINGAPORE BRANCH | SINGAPORE | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||||
Aon Global LIMITEDAon Global LIMITEDNational HQ | City of London, Unitedkingdom | 2011 | 218 | $131.8M | Corporation | Alistair Patrick Boyd | fmglobal.com | 6719 | Offices of Holding Companies, Not Elsewhere Classified | 1568 | RANDOLPH FINANCE UNLIMITED COMPANY | DUBLIN | Ireland | AON GLOBAL LIMITED | LONDON | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||
Aon Consulting, INC.Aon Consulting, INC.National HQ | Wayne, USA | 2012 | 210 | $10.0M | Corporation | Patrick G Ryan | aon.com | 6411 | Insurance Agents, Brokers, and Service | 1740 | AON GLOBAL LIMITED | LONDON | England | Aon Consulting, Inc. | Wayne | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||
Inpoint, INC.Inpoint, INC.National HQ | Chicago, USA | 2012 | 20 | $1.3M | Corporation | Steven Kauderer | cyber.aon.com/contact-us | 8742 | Management Consulting Services | 1740 | AON GLOBAL LIMITED | LONDON | England | InPoint, Inc. | Chicago | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||
Futurity Group, INC.Futurity Group, INC. | Henderson, USA | 2010 | 12 | $354K | Corporation | Judy Merane | 8742 | Management Consulting Services | 1740 | Inpoint, Inc. | Chicago | United States of America | InPoint, Inc. | Chicago | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | |||
Aon Advisors INCAon Advisors INCNational HQ | Chicago, USA | 2012 | 3 | $512K | Corporation | Michael Conway | aon.com/about-aon/contact-us.jsp | 6282 | Investment Advice | 1740 | AON GLOBAL LIMITED | LONDON | England | AON Advisors Inc | Chicago | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||
Aon Risk Services Companies, INC.Aon Risk Services Companies, INC.National HQ | Libertyville, USA | 1988 | 6,000 | $190.0M | Corporation | Gregory C Case | 6411 | Insurance Agents, Brokers, and Service | 1740 | AON GLOBAL LIMITED | LONDON | England | AON Risk Services Companies, Inc. | LIBERTYVILLE | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | |||
Aon Risk Services Companies, INC.Aon Risk Services Companies, INC. | Alpharetta, USA | 4 | Gary Huntley | 6411 | Insurance Agents, Brokers, and Service | 1740 | AON Risk Services Companies, Inc. | LIBERTYVILLE | United States of America | AON Risk Services Companies, Inc. | LIBERTYVILLE | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||||||
Aon Risk Services Companies, INC.Aon Risk Services Companies, INC. | Rolling Meadows, USA | 20 | Cynthia L Lamantia | 6411 | Insurance Agents, Brokers, and Service | 1740 | AON Risk Services Companies, Inc. | LIBERTYVILLE | United States of America | AON Risk Services Companies, Inc. | LIBERTYVILLE | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||||||
Aon Risk Services Companies, INC.Aon Risk Services Companies, INC. | Buffalo Grove, USA | 5 | N A | 9999 | Nonclassifiable Establishments | 1740 | AON Risk Services Companies, Inc. | LIBERTYVILLE | United States of America | AON Risk Services Companies, Inc. | LIBERTYVILLE | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||||||
Aon Risk Services Companies, INC.Aon Risk Services Companies, INC. | Casper, USA | 2 | Dan Kelly | 6411 | Insurance Agents, Brokers, and Service | 1740 | AON Risk Services Companies, Inc. | LIBERTYVILLE | United States of America | AON Risk Services Companies, Inc. | LIBERTYVILLE | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||||||
Aon Risk Services Companies, INC.Aon Risk Services Companies, INC. | Berwyn, USA | 5 | Susan Hunsberger | 6411 | Insurance Agents, Brokers, and Service | 1740 | AON Risk Services Companies, Inc. | LIBERTYVILLE | United States of America | AON Risk Services Companies, Inc. | LIBERTYVILLE | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||||||
Aon Risk Services Companies, INC.Aon Risk Services Companies, INC. | Glastonbury, USA | 10 | Rebecca Schafer Bruce | 6411 | Insurance Agents, Brokers, and Service | 1740 | AON Risk Services Companies, Inc. | LIBERTYVILLE | United States of America | AON Risk Services Companies, Inc. | LIBERTYVILLE | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | ||||||
Aon Risk Services Companies, INC.Aon Risk Services Companies, INC. | Lincolnshire, USA | 21 | Ram Padmanabhan | aon.com | 6411 | Insurance Agents, Brokers, and Service | 1740 | AON Risk Services Companies, Inc. | LIBERTYVILLE | United States of America | AON Risk Services Companies, Inc. | LIBERTYVILLE | AON PUBLIC LIMITED COMPANY | DUBLIN | Ireland | |||||
Get 1,000 subsidiaries free
Aon’s ownership network is part of over 41 million corporate hierarchies in our company ownership database. It shows how Aon is organized worldwide, listing parent companies and subsidiaries with verified data from groups active in 150 countries and jurisdictions. Discover how our data works — and request a sample tailored to your needs.
In Chicago, United States (Aon Center).
About 1,509 worldwide across 71 countries.
Aon plc is publicly listed; no single majority shareholder.
Yes. Aon plc is incorporated in the USA.
Aon employs over 50,000 people globally.
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Knowing who owns and controls a company helps you understand how it functions and connects globally. Our corporate hierarchy data allows you to trace relationships between parent companies, subsidiaries, and shareholders, showing control, structure, and risks within any global group. This insight is vital when looking at Aon or other multinational corporations for compliance purposes, market analysis, and better data management. With verified ownership records of over 380 million companies worldwide, CompanyData.com delivers clear data on corporate ownership across industries and countries.
At CompanyData.com, each company profile including Aon is organized using a three-level model: Global, National, and Local headquarters. This structure shows how every entity fits within the larger corporate family.
Each entity receives a unique identifier to link subsidiaries with parent firms, trace ownership paths, and enable easy integration with your internal systems.
Control is defined based on ownership shares. When a company owns over fifty percent of another, it is viewed as a controlled subsidiary. Our focus on majority-controlled subsidiaries provides a clear picture of ownership and corporate hierarchy, capturing the full global scale of groups like Aon.
This methodology highlights who ultimately makes decisions within the Aon Group, streamlines compliance checks, aids in merger and acquisition analysis, and supports risk management. By mapping each company with verified ownership data, CompanyData.com gives you confidence to explore Aon’s corporate structure fully. With over 1,500 entities linked across more than 85 countries, our platform creates transparency for complex international corporate families.

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Aon plc is a leading global professional services firm providing a broad range of risk, retirement, and health solutions. Founded over a century ago, its headquarters are located in London, United Kingdom. Aon operates across multiple countries worldwide, managing risk and helping businesses optimize performance through data and analytics.
Aon’s operations are divided into major segments that support its global presence:
Aon reported revenue of approximately $12.19 billion, reflecting its strength in global markets and diversified service offerings. Its financial performance continues to be driven by growth in advisory services and solutions across risk, health, and retirement sectors.
With over 1,500 subsidiaries operating internationally, Aon has a strong presence in 94 countries. Key country markets include the USA (775 subsidiaries), UK (158 subsidiaries), Canada (92 subsidiaries), Germany (42 subsidiaries), Spain (56 subsidiaries), and Italy (83 subsidiaries). This extensive network supports local and multinational clients effectively.
Aon emphasizes responsible business practices including environmental sustainability and social initiatives. The company invests in programs promoting diversity, equity, and inclusion, as well as community engagement globally.
Aon faces challenges like regulatory changes and market volatility but continues to see opportunities through technology innovation and expanded advisory services, especially in emerging markets.
As a global leader in risk and human capital solutions, Aon’s broad portfolio and international reach position it well for future growth. For up-to-date details, review Aon’s official reports and verified data from sources like CompanyData.com.
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The price of our Aon company data depends on your details and delivery method. Whether you need a list of subsidiaries or the full dataset via API or bulk files, we offer flexible pricing to suit your needs. Request a free quote and record count within 24 hours — our team provides transparent pricing and a free sample of 10 company contacts. At CompanyData.com, you only pay for the verified global data you need.
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At CompanyData.com, you can access detailed, verified data on Aon plc and all its subsidiaries, updated daily. This includes company names, registration details, locations, industry classifications, financial indicators, and key contacts. You can download the data via the Bold Platform, API, or bulk file delivery. Our database offers 100% worldwide company coverage, ensuring complete and accurate insights.
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