Where is Aon headquartered?
In Chicago, United States (Aon Center).
List of Aon subsidiaries
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.
| Company Name | Country | City | Address 1 | State/Province | Postal Code | Website | Founding Year | Yearly Revenue in U.S. Dollars | Employees Total | Business Legal Type - Description | Number of Companies in Group | Company Registration Number | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Aon Holdings Corretores De Seguros | Brazil | Belo Horizonte | Rua Sergipe 1492 | Minas Gerais | 30130-174 | convista.***** | 2001 | 0 | 46 | 1707 | 48102552000641 | |
| 2 | Aon Holdings Corretores De Seguros | Brazil | Campinas | Rua Odila Maia Rocha Brito 527 | São Paulo | 13092-110 | N/A | 1987 | 0 | 23 | 1707 | 48102552000307 | |
| 3 | Aon Holdings Corretores De Seguros | Brazil | Recife | Rua Padre Carapuceiro 706 | Pernambuco | 51020-280 | N/A | N/A | 0 | 0 | 1707 | 48102552002423 | |
| 4 | Aon Risk Services Southwest, INC. | USA | Houston | 5555 San Felipe St Ste 1500 | Harris | 77056 | aon.***** | 1970 | $16,025,331 | 450 | Corporation | 1707 | N/A |
| 5 | Aon Consulting, INC. | USA | Chicago | 180 N Stetson Ave Ste 2800 | Cook | 60601 | N/A | N/A | 0 | 300 | 1707 | N/A | |
| 6 | Aon Financial Services Group, INC. | USA | Chicago | 123 N Wacker Dr Ste 2500 | Cook | 60606 | aon.***** | 1988 | $2,304,733 | 105 | Corporation | 1707 | N/A |
| 7 | Alexander Aluminum Products, INC. | USA | Louisville | 220 W Main St Ste 1800 | Jefferson | 40202 | N/A | 2012 | $1,649,981 | 54 | Corporation | 1707 | N/A |
| 8 | Affinity Insurance Services, INC. | USA | Boston | 1 Federal St Fl 20 | Suffolk | 02110 | aon.***** | N/A | 0 | 53 | 1707 | N/A | |
| 9 | Lenox Advisors, INC. | USA | New York City | 90 Park Ave Fl 18 | New York | 10016 | lenoxadvisors.***** | 2001 | $10,020,647 | 30 | Corporation | 1707 | 2713548 |
| 10 | Pension Solutions, INC. | USA | Cleveland | 28601 Chagrin Blvd Ste 550 | Cuyahoga | 44122 | nfp.***** | 2005 | $3,442,397 | 19 | Corporation | 1707 | N/A |
| 11 | Aon Risk Insurance Services West, INC. | USA | Portland | 851 Sw 6th Ave Ste 550 | Multnomah | 97204 | aon.***** | N/A | 0 | 19 | 1707 | N/A | |
| 12 | Aon Consulting, INC. | USA | Washington | 2001 K St Nw Ste 625n | District of Columbia | 20006 | aon.***** | N/A | 0 | 17 | 1707 | N/A | |
| 13 | Aon Risk Consultants, INC. | USA | Philadelphia | 1 Liberty Pl Ste 1000 | Philadelphia | 19103 | aon.***** | N/A | 0 | 16 | 1707 | N/A | |
| 14 | Aon Risk Services Companies, INC. | USA | Milwaukee | 10700 W Research Dr Ste 450 | Milwaukee | 53226 | aon.***** | N/A | 0 | 16 | 1707 | N/A | |
| 15 | Aon Consulting, INC. | USA | San Francisco | 851 van Ness Ave | San Francisco | 94109 | N/A | N/A | 0 | 12 | 1707 | N/A | |
| 16 | Insgroup Services CO | USA | Greenwood Village | 5350 S Roslyn St Ste 306 | Arapahoe | 80111 | N/A | 1996 | $424,866 | 12 | Corporation | 1707 | 19871568464 |
| 17 | Aon Consulting, INC. | USA | Chicago | 230 W Monroe St Ste 1000 | Cook | 60606 | N/A | N/A | 0 | 11 | 1707 | N/A | |
| 18 | Aon Consulting, INC. | USA | Minneapolis | 8300 Norman Center Dr Ste 1000 | Hennepin | 55437 | aon.***** | N/A | 0 | 11 | 1707 | N/A | |
| 19 | Custom Benefit Programs, INC. | USA | Foothill Ranch | 27042 Towne Centre Dr Ste 265 | Orange | 92610 | N/A | N/A | 0 | 11 | 1707 | N/A | |
| 20 | Aon Consulting, INC. | USA | Bellevue | 2600 116th Ave Ne Ste 200 | King | 98004 | N/A | N/A | 0 | 10 | 1707 | N/A | |
| 21 | Aon Risk Services Companies, INC. | USA | Shawnee Mission | 4500 College Blvd Ste 310 | Johnson | 66211 | N/A | N/A | 0 | 10 | 1707 | N/A | |
| 22 | Aon Consulting, INC. | USA | Buffalo | 205 Park Club Ln | Erie | 14221 | N/A | N/A | 0 | 10 | 1707 | N/A | |
| 23 | Muirfield Underwriters LTD | USA | Phoenix | 11811 N Tatum Blvd Ste 3057 | Maricopa | 85028 | N/A | 1997 | $102,632 | 9 | Corporation | 1707 | 2325940 |
| 24 | Forester Benefits Management LLC | USA | Knoxville | 1909 Pinnacle Pointe Way | Knox | 37922 | foresterbenefits.***** | 2019 | $622,350 | 8 | Corporation | 1707 | 000536476 |
| 25 | Aon Consulting, INC. | USA | Woodland Hills | 21900 Burbank Blvd Ste 101 | Los Angeles | 91367 | N/A | N/A | 0 | 8 | 1707 | N/A | |
| 26 | Aon Consulting, INC. | USA | Escondido | 1815 S Centre City Pkwy | San Diego | 92025 | aisinsurance.***** | N/A | 0 | 8 | 1707 | N/A |
Showing 26 of 1,706 companies
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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.
Global data. Local insights.
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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.
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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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