Where is Marsh McLennan headquartered?
In New York, United States (company ID 0152675489).
List of Marsh McLennan subsidiaries
Marsh McLennan is a global professional services firm headquartered in New York, United States. Founded in 1905, Marsh McLennan operates through a broad corporate structure with 1,587 subsidiaries worldwide. This ownership data is part of CompanyData.com’s verified corporate hierarchy database, covering over 380 million companies worldwide.
Marsh McLennan has 1,587 subsidiaries spread across 68 countries. The largest numbers are in the United States with 642 entities (40%), followed by the United Kingdom with 250 subsidiaries (15.7%), and Australia with 67 subsidiaries (4.2%). These markets represent the main hubs of Marsh McLennan’s global operations across consulting, insurance, risk management, and other professional services.
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 |
Marsh USA LLC
|
USA
|
Norwalk
|
601 Merritt 7
|
N/A
|
Fairfield
|
06851
|
marsh.com
|
N/A
|
$0
|
19
|
1591
|
N/A
|
************@********.***
|
20*****00
|
0894858123
|
|
| 2 |
Marsh USA INC.
|
USA
|
Charlotte
|
100 N Tryon St Ste 3600
|
N/A
|
Mecklenburg
|
28202
|
marsh.com
|
N/A
|
$0
|
15
|
1591
|
N/A
|
********@*******.***
|
70*****00
|
0202369297
|
|
| 3 |
Marsh & Mclennan Agency LLC
|
USA
|
Walnut Creek
|
1255 Treat Blvd Ste 950
|
N/A
|
Contra Costa
|
94597
|
marshmma.com
|
N/A
|
$0
|
12
|
1591
|
N/A
|
********@******.***
|
92*****00
|
0190784450
|
|
| 4 |
Lavaretus Underwriting AB
|
Sweden
|
Stockholm
|
Jakobsbergsgatan 7, 4 Tr
|
N/A
|
Stockholms Län
|
11144
|
N/A
|
2009
|
$140,197
|
11
|
Corporation
|
1591
|
5567952212
|
**********@****.***
|
07*****35
|
0461146794
|
| 5 |
M&M Vehicle, L.P.
|
USA
|
New York City
|
1166 Avenue of the Americas
|
N/A
|
New York
|
10036
|
N/A
|
2019
|
$766,476
|
5
|
1591
|
N/A
|
*******@*****.***
|
0228424327
|
||
| 6 |
Marsh EOOD
|
Bulgaria
|
Sofia
|
90 Tsarigradsko Shose Blvd.
|
Capital Fort, Building A, Fl. 11
|
Sofia-grad
|
1784
|
N/A
|
2022
|
$245,601
|
3
|
Corporation
|
1591
|
130404971
|
************@****.***
|
08*****53
|
0784585453
|
| 7 |
Marsh SPA
|
Italy
|
Bergamo
|
Via Stezzano 87
|
N/A
|
Bergamo
|
24126
|
marsh.com/it
|
N/A
|
$0
|
0
|
1591
|
IT01699520159
|
******@***.***
|
34*****80
|
0550138358
|
|
| 8 |
Mmc International Holdings LLC
|
USA
|
New York City
|
1166 Avenue of the Americas
|
N/A
|
New York
|
10036
|
marshmclennan.com
|
2013
|
$13,170,645
|
658
|
Corporation
|
1591
|
5402067
|
******@*******.***
|
21*****00
|
0228410147
|
| 9 |
John L. Wortham & Son, LIMITED Partnership
|
USA
|
Houston
|
2727 Allen Pkwy Ste 2400
|
N/A
|
Harris
|
77019
|
fconline.foundationcenter.org
|
2018
|
$13,868,643
|
469
|
Partnership of unknown type
|
1591
|
0800273814
|
*******@********.***
|
71*****49
|
0188528644
|
| 10 |
National Economic Research Associates, INC.
|
USA
|
New York City
|
1166 Avenue of the Americas 29f
|
N/A
|
New York
|
10036
|
nera.com
|
1991
|
$14,310,081
|
411
|
Corporation
|
1591
|
0711550
|
*****@****.***
|
21*****00
|
0183912909
|
| 11 |
Marsh USA INC.
|
USA
|
Boston
|
99 High St Ste 1300
|
N/A
|
Suffolk
|
02110
|
marsh.com
|
N/A
|
$0
|
183
|
1591
|
N/A
|
*********@******.***
|
61*****00
|
0891980941
|
|
| 12 |
Marsh International Holdings, INC.
|
USA
|
New York City
|
1166 Avenue of the Americas
|
N/A
|
New York
|
10036
|
marshmclennan.com
|
1999
|
$2,296,148
|
172
|
Corporation
|
1591
|
N/A
|
*********@******.***
|
21*****00
|
0920250248
|
| 13 |
Mercer Health & Benefits LLC
|
USA
|
Tulsa
|
401 S Boston Ave Ste 800
|
N/A
|
Tulsa
|
74103
|
marsh.com
|
N/A
|
$0
|
172
|
1591
|
N/A
|
******@***.***
|
91*****90
|
0987706603
|
|
| 14 |
Mercer (us) INC.
|
USA
|
Houston
|
10900 Corporate Centre Dr Ste 200
|
N/A
|
Harris
|
77041
|
mercer.com
|
N/A
|
$0
|
150
|
1591
|
N/A
|
*****@********.***
|
0264336965
|
||
| 15 |
Marsh & Mclennan Agency LLC
|
USA
|
Fort Lauderdale
|
1000 Corporate Dr Ste 400
|
N/A
|
Broward
|
33334
|
seitlin.com
|
N/A
|
$0
|
148
|
1591
|
N/A
|
*****@****.***
|
30*****90
|
0154466413
|
|
| 16 |
Mercer Health & Benefits LLC
|
USA
|
Memphis
|
1000 Ridgeway Loop Rd 4th Fl
|
N/A
|
Shelby
|
38120
|
mercer.com
|
N/A
|
$0
|
142
|
1591
|
N/A
|
********@*******.***
|
90*****00
|
0256771428
|
|
| 17 |
Alliant Services Houston, INC.
|
USA
|
Latham
|
13 Cornell Rd
|
N/A
|
Albany
|
12110
|
jlt.com
|
1987
|
$818,621
|
130
|
Corporation
|
1591
|
271066
|
*********@******.***
|
51*****00
|
0729188568
|
| 18 |
Guy Carpenter & Company, LLC
|
USA
|
Philadelphia
|
30 S 17th St Fl 17
|
N/A
|
Philadelphia
|
19103
|
guycarp.com
|
N/A
|
$0
|
100
|
1591
|
N/A
|
*****@***.***
|
21*****00
|
0906650023
|
|
| 19 |
The Carpenter Management CORP
|
USA
|
New York City
|
1166 Avenue of the Americas
|
N/A
|
New York
|
10036
|
guycarp.com
|
1961
|
$3,378,035
|
99
|
Corporation
|
1591
|
0561629
|
*********@******.***
|
91*****00
|
0894784969
|
| 20 |
Dovetail Insurance CORP.
|
USA
|
Lincoln
|
8100 S 13th St
|
N/A
|
Lancaster
|
68512
|
dovetailinsurance.com
|
2015
|
$2,216,312
|
70
|
Corporation
|
1591
|
4226664
|
*****@****.***
|
80*****91
|
0126615399
|
| 21 |
Marsh USA INC.
|
USA
|
Columbus
|
325 John H Mcconnell Blvd Ste 350
|
N/A
|
Franklin
|
43215
|
marsh.com
|
N/A
|
$0
|
64
|
1591
|
N/A
|
*******@*******.***
|
61*****00
|
0717384112
|
|
| 22 |
Marsh USA LLC
|
USA
|
Urbandale
|
12421 Meredith Dr
|
N/A
|
Polk
|
50398
|
marsh.com
|
N/A
|
$0
|
61
|
1591
|
N/A
|
************@********.***
|
51*****00
|
0941700783
|
|
| 23 |
Torrent Technologies, INC.
|
USA
|
Kalispell
|
1935 3rd Ave E Ste 100
|
N/A
|
Flathead
|
59901
|
torrentcorp.com
|
2014
|
$4,615,748
|
60
|
Corporation
|
1591
|
3931304
|
********@******.***
|
40*****58
|
0900744632
|
| 24 |
Marsh USA LLC
|
USA
|
Morristown
|
445 South St Ste 210
|
N/A
|
Morris
|
07960
|
marsh.com
|
N/A
|
$0
|
44
|
1591
|
N/A
|
********@*****.***
|
97*****00
|
0209471849
|
|
| 25 |
Guy Carpenter & Company, LLC
|
USA
|
New York City
|
1166 Avenue of the Americas
|
N/A
|
New York
|
10036
|
guycarp.com
|
N/A
|
$0
|
39
|
1591
|
N/A
|
************@*******.***
|
20*****00
|
0260217493
|
|
| 26 |
Paynewest Insurance, INC.
|
USA
|
Beaverton
|
14900 Sw Barrows Rd
|
N/A
|
Washington
|
97007
|
paynewest.com
|
N/A
|
$0
|
37
|
1591
|
N/A
|
*****@***.***
|
97*****50
|
0127829531
|
Access 1,000 subsidiaries free
Marsh McLennan’s corporate network is part of over 41 million corporate hierarchies available in our company ownership database. It shows how the group is structured worldwide, with parent companies and subsidiaries backed by verified information from companies in more than 200 countries and territories. See how our data works and request a tailored sample today.
In New York, United States (company ID 0152675489).
Around 1,587 companies in over 80 countries.
Marsh McLennan is publicly traded with no single majority owner.
Yes. It is incorporated in the United States.
The company employs approximately 85,000 people globally.
Global data. Local insights.
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Knowing who owns and controls a company helps reveal how it operates worldwide. Our corporate hierarchy data shows connections between parent companies, subsidiaries, and shareholders, laying out the structure and control within global groups. Whether you are researching Marsh McLennan or any other large multinational, this detailed ownership insight supports compliance checks, market research, and better CRM data management. CompanyData.com offers verified ownership data on over 380 million companies globally, giving you a clear picture of company relationships across industries and countries.
At CompanyData.com, each company profile, such as Marsh McLennan, is detailed using a three-level headquarters hierarchy: Global, National, and Local. This method clarifies how different branches connect in the wider group.
Every company in the group is assigned a unique ID, helping to link subsidiaries to their parent firms and track ownership. This allows seamless integration into your systems.
Control is defined by shareholding. Where Marsh McLennan owns over 50% of a company, that company is flagged as a controlled subsidiary. We highlight these majority stakes to clearly map the corporate groups. This helps users understand complex relationships in groups like Marsh McLennan as well as other global firms.
This model reveals who makes key decisions within the Marsh McLennan Group, making compliance, risk assessment, and corporate research easier. With verified ownership covering more than 1,587 subsidiaries across 100+ countries, including significant presence in the USA (642 entities), United Kingdom (250 entities), Australia (67 entities), Canada (51 entities), and France (27 entities), our platform provides clarity for international teams working with Marsh McLennan’s complex structure.
CompanyData.com provides verified insights into the global corporate structure of Marsh McLennan, offering detailed data on its subsidiaries worldwide. This information supports compliance checks, CRM enrichment, market research, and competitive analysis. Sample data for evaluation is available, with larger datasets (up to 1,000 companies) for qualified corporate users with a verified website and clear use case. For direct contact or lead lists, please see our Company Data Platform.
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