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.
Global ownership data
Download subsidiary lists
Structured hierarchies
Contact and email data
| Company Name | Country | City | Address 1 | Address 2 | 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 | Phone Number | UniqueID | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |
Baloo
|
France
|
Marseille
|
118 Rue Roger Mathurin
|
N/A
|
Bouches-du-rhône
|
13010
|
baloo-gestion.*****
|
2013
|
$18,478,858
|
194
|
Corporation
|
1734
|
79756683300019
|
******@***.***
|
+3*****61
|
0376573884
|
| 2 |
Charon Planning Health & Welfare, LLC
|
USA
|
Warrington
|
2600 Kelly Rd
|
N/A
|
Bucks
|
18976
|
charonplanning.*****
|
2007
|
$915,782
|
53
|
Corporation
|
1734
|
0000567889
|
***********@***.***
|
0912902335
|
|
| 3 |
Nfp Property & Casualty Services, INC.
|
USA
|
Flagstaff
|
214 E Birch Ave
|
N/A
|
Coconino
|
86001
|
nfp.*****
|
N/A
|
$0
|
20
|
1734
|
N/A
|
***********@********.***
|
+1*****50
|
0191873969
|
|
| 4 |
Aon Consulting, INC.
|
USA
|
Salinas
|
307 Main St Ste 340
|
N/A
|
Monterey
|
93901
|
aon.*****
|
N/A
|
$0
|
18
|
1734
|
N/A
|
******@*******.***
|
+1*****31
|
0232633964
|
|
| 5 |
Rose & Kiernan, INC.
|
USA
|
Watertown
|
1116 Arsenal St Ste 100
|
N/A
|
Jefferson
|
13601
|
rkinsurance.*****
|
N/A
|
$0
|
11
|
1734
|
N/A
|
********@*******.***
|
+1*****00
|
0905411487
|
|
| 6 |
Baker Capital Advisers
|
USA
|
Winston-salem
|
121 Reynolda Vlg Ste A
|
N/A
|
Forsyth
|
27106
|
bakercapital.*****
|
2005
|
$247,208
|
2
|
1734
|
N/A
|
******@********.***
|
+1*****10
|
0290667940
|
|
| 7 |
Nfp CORP.
|
USA
|
Santa Ana
|
1851 E 1st St Ste 1650
|
N/A
|
Orange
|
92705
|
N/A
|
N/A
|
$0
|
1
|
1734
|
N/A
|
************@********.***
|
+1*****45
|
0191115768
|
|
| 8 |
Nfp Intermediate Holdings B CORP.
|
USA
|
Littleton
|
532 Union St
|
N/A
|
Grafton
|
03561
|
nfp.*****
|
N/A
|
$0
|
0
|
1734
|
N/A
|
************@********.***
|
+1*****00
|
0204677363
|
|
| 9 |
Aon Holdings France SNC
|
France
|
Colombes
|
420 Rue Estienne D Orves
|
N/A
|
Hauts-de-seine
|
92700
|
aon.*****
|
2008
|
$0
|
0
|
1734
|
50121141100027
|
*****@***.***
|
+3*****11
|
0374505086
|
|
| 10 |
Delta Assurances
|
France
|
Paris
|
31 Rue de la Federation
|
N/A
|
Paris
|
75015
|
aonassurances.*****
|
2025
|
$0
|
0
|
1734
|
05780817200084
|
******@*******.***
|
+3*****10
|
0395609876
|
|
| 11 |
Delta Assurances
|
France
|
Marseille
|
Parc Des Fonderies
|
38 Avenue Benjamin Delessert
|
Bouches-du-rhône
|
13010
|
delta-assurances.*****
|
1957
|
$21,024,518
|
118
|
Corporation
|
1734
|
05780817200043
|
************@***.***
|
+3*****63
|
0371310538
|
| 12 |
Aon France
|
France
|
Toulouse
|
25 All Jean Jaures
|
N/A
|
Haute-garonne
|
31000
|
aon.*****
|
2014
|
$0
|
6
|
1734
|
41457224800287
|
*****@*****.***
|
+3*****28
|
0377097338
|
|
| 13 |
Aon Holdings Corretores De Seguros
|
Brazil
|
Campinas
|
Rua Odila Maia Rocha Brito 527
|
Conj 102
|
São Paulo
|
13092-110
|
N/A
|
1987
|
$0
|
23
|
1734
|
48102552000307
|
*********@*******.***
|
+5*****52
|
01017828995
|
|
| 14 |
Aon Holdings Corretores De Seguros
|
Brazil
|
Sao Paulo
|
Rua Dr Rubens Gomes Bueno 691
|
Andar 16 Ao18
|
São Paulo
|
04730-903
|
N/A
|
1976
|
$172,178,264
|
1405
|
Partnership of unknown type
|
1734
|
48102552000137
|
*****@********.***
|
+5*****00
|
01011102735
|
| 15 |
Aon France
|
France
|
Angoulême
|
All de Bellevue
|
N/A
|
Charente
|
16000
|
aon.*****
|
2003
|
$0
|
100
|
1734
|
41457224800162
|
*****@*******.***
|
+3*****53
|
0382953188
|
|
| 16 |
Aon France
|
France
|
Marseille
|
3 Rue Gaston Castel
|
Bp 108
|
Bouches-du-rhône
|
13016
|
aon.*****
|
2002
|
$0
|
100
|
1734
|
41457224800121
|
********@****.***
|
+3*****00
|
0373986083
|
|
| 17 |
Rydy Jth 2, LLC
|
USA
|
Hollywood
|
4000 Hollywood Blvd Ste 500
|
N/A
|
Broward
|
33021
|
N/A
|
2020
|
$626,253
|
2
|
Corporation
|
1734
|
L20000366226
|
********@******.***
|
0197806279
|
|
| 18 |
Aon CORPORATION
|
USA
|
Chicago
|
200 E Randolph St
|
N/A
|
Cook
|
60601
|
aon.*****
|
1979
|
$1,813,659,058
|
65000
|
Corporation
|
1734
|
0883674
|
********@****.***
|
+1*****00
|
0149614657
|
| 19 |
Aon Consulting Worldwide, INC.
|
USA
|
Franklin
|
720 Cool Springs Blvd Ste 680
|
N/A
|
Williamson
|
37067
|
aon.*****
|
N/A
|
$0
|
1511
|
1734
|
N/A
|
*******@****.***
|
+1*****57
|
0280206246
|
|
| 20 |
Aon Consulting Worldwide, INC.
|
USA
|
Pasadena
|
N/A
|
N/A
|
Los Angeles
|
91189
|
N/A
|
N/A
|
$0
|
1163
|
1734
|
N/A
|
******@*****.***
|
0282356938
|
||
| 21 |
Aon Re, INC.
|
USA
|
Minneapolis
|
5600 W 83rd St Ste 1100
|
N/A
|
Hennepin
|
55437
|
aon.*****
|
2012
|
$72,690,216
|
710
|
Corporation
|
1734
|
55203385
|
*****@********.***
|
+1*****00
|
0182904768
|
| 22 |
Aon Re Worldwide, INC.
|
USA
|
Chicago
|
200 E Randolph St Fl 15
|
N/A
|
Cook
|
60601
|
aon.*****
|
1994
|
$7,174,367
|
500
|
Proprietorship
|
1734
|
N/A
|
********@****.***
|
+1*****65
|
01059294039
|
| 23 |
Aon Fac, INC.
|
USA
|
Chicago
|
200 E Randolph St Fl 15
|
N/A
|
Cook
|
60601
|
aon.*****
|
1988
|
$32,989,932
|
400
|
Corporation
|
1734
|
363599313
|
*******@****.***
|
+1*****65
|
0154463479
|
| 24 |
Martin Boyer Company, INC.
|
USA
|
Chicago
|
175 W Jackson Blvd Fl 10
|
N/A
|
Cook
|
60604
|
N/A
|
1990
|
$1,792,027
|
160
|
Corporation
|
1734
|
55801657
|
************@********.***
|
+1*****56
|
0179586528
|
| 25 |
Aon Risk Services INC Of Washington D C
|
USA
|
Washington
|
2001 K St Nw Ste 625n
|
N/A
|
District of Columbia
|
20006
|
aon.*****
|
2012
|
$9,566,072
|
150
|
Corporation
|
1734
|
N/A
|
*********@***.***
|
+1*****73
|
0667728698
|
| 26 |
Nfp Corporate Services (ny), LLC
|
USA
|
New York City
|
200 Park Ave Rm 3202
|
N/A
|
New York
|
10166
|
grahampartners.*****
|
2004
|
$6,152,064
|
100
|
Corporation
|
1734
|
3132353
|
************@******.***
|
+1*****30
|
0117568126
|
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.
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.
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.
CompanyData.com supports global organizations that need verified insights into corporate ownership structures, from CRM enrichment and compliance workflows to market intelligence and analytics. We provide free evaluation samples; larger data samples (for example, up to 1,000 companies) are available to qualified corporate buyers with a defined use case and an active company website. If your primary need is contact or lead lists, please visit our Company Data Platform instead.
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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.
You can access Aon company data through API, bulk files, or the Bold Platform. We create custom datasets based on your target countries, industries, and company profiles. After you share your criteria, our experts prepare a tailored dataset and send a free quote with record counts and sample data within 24 hours. Once approved, we deliver your data quickly in your preferred format — via Excel, API, bulk file, or directly in the Bold Platform.
If you need company data from any organization or industry, CompanyData.com provides complete global coverage. You’ll get accurate, verified business information across every country and sector. Simply tell us what you’re looking for, and our experts will prepare a custom dataset that fits your goals. Within 24 hours, you’ll receive a free quote, record count, and sample data. Once approved, we deliver your data fast — via Excel, API, bulk file, or directly in the Bold Platform.
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.
At CompanyData.com, we offer secure and flexible payment options for purchasing company data, including credit cards, bank transfer, and PayPal. All payments are processed safely, and invoices are provided. For larger or ongoing access, we also support subscription billing and custom invoicing. Need a special arrangement? Contact our sales team — we’re happy to help.
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.
At CompanyData.com, our data comes from verified global business sources to ensure accuracy and full coverage. We combine official registers, financial filings, LEI records, trusted partners, and verified company websites. All data is cross-checked and validated by our experts, ensuring it’s accurate, up-to-date, and GDPR-compliant.
Tell us your target group, and we’ll send you a free quote and a tailored company ownership dataset — sample included. Call +31 20 705 236 or email sales@companydata.com. Ready to order? Simply reply to the quote, and CompanyData.com delivers your dataset in CSV or Excel within 24 hours.