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List of Aon subsidiaries

Verified insights into Aon’s global corporate structure and 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.

Geographic spread of Aon’s subsidiaries

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

Top Subsidiaries and Companies Owned by Aon

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 Email 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

Companies by Employee Size

  • 0 or Unknown 325
  • 1-4 421
  • 5-9 284
  • 10-19 253
  • 20-49 195
  • 50-99 126
  • 100-199 57
  • 200-499 41
  • 500-999 8
  • 1.000-4.999 20
  • 10.000+ 2

Companies by Revenue Size (in USD)

  • 0 or Unknown 916
  • 1 to 100.000 30
  • 100.001 to 499.999 205
  • 500.000 to 999.999 130
  • 1.000.000 to 4.999.999 243
  • 5.000.000 to 9.999.999 68
  • 10.000.000 to 49.999.999 75
  • 50.000.000 to 99.999.999 23
  • 100.000.000 to 499.999.999 27
  • 500.000.000 to 999.999.999 6
  • 1.000.000.000 or more 9

Get 1,000 subsidiaries free

Explore Aon's Global Corporate Structure

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.

Aon Company Facts

Where is Aon headquartered?

In Chicago, United States (Aon Center).

How many subsidiaries does Aon have?

About 1,509 worldwide across 71 countries.

Who owns Aon?

Aon plc is publicly listed; no single majority shareholder.

Is Aon a US company?

Yes. Aon plc is incorporated in the USA.

How many people work for Aon?

Aon employs over 50,000 people globally.

Corporate family tree

Why Understanding Aon's Ownership Structure is Important

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.

How We Structure Global, National, and Local Headquarters for Aon

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.

Levels of corporate hierarchy explained

  • Global HeadquarterAon plc is the global headquarter for the Aon Group and serves as the top-level parent company, based in London, United Kingdom. It holds overall control over the entire group.
  • National Headquarters — These are country-specific entities within the group, coordinating local operations and reporting back to the global parent. Some examples include Aon USA Inc., Aon Canada Ltd., and Aon Netherlands B.V.
  • Local Headquarters — These manage specific branches, offices, or regional operations to ensure local compliance and market presence within their territories.

Each entity receives a unique identifier to link subsidiaries with parent firms, trace ownership paths, and enable easy integration with your internal systems.

How we identify control

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.

Why this matters for your business

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.

 

Aon

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85 reviews

Aon ownership & subsidiary data – FAQs

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.

Key Business Areas of Aon:

Aon’s operations are divided into major segments that support its global presence:

  1. Risk Solutions: This segment offers risk management, insurance brokerage, and consulting services. Aon advises businesses on how to reduce risks and protect assets through tailored insurance and risk transfer strategies.
  2. Retirement Solutions: Aon provides retirement planning, consulting, and administration services helping organizations manage employee benefit programs and pension plans effectively.
  3. Health Solutions: This area focuses on health benefit consulting and solutions that help businesses manage employee health costs and promote wellbeing.
  4. Data & Analytics: Aon leverages advanced data capabilities to support decision making and provide insights on risk and human capital.

Aon’s Financial Overview:

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.

Global Footprint and Subsidiaries:

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.

Sustainability and Corporate Responsibility:

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.

Challenges and Opportunities:

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.

Conclusion:

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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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.

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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.

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.

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