Where is Marsh McLennan headquartered?
In New York, United States (company ID 0152675489).
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.
List of Marsh McLennan 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Marsh & Mclennan Companies, INC.Marsh & Mclennan Companies, INC.Global Headquarter | New York City, USA | 1871 | 90,000 | $27.0B | Corporation | John Q Doyle | marshmclennan.com | 6411 | Insurance Agents, Brokers, and Service | 1689 | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | Marsh & McLennan Companies, Inc. | NEW YORK | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | ||
Marsh & Mclennan Companies, INC.Marsh & Mclennan Companies, INC.National HQ | Perth, Australia | 51 | Geoff Furgosn | 6289 | Services Allied With the Exchange of Securities or Commodities, Not Elsewhere Classified | 1695 | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | Marsh & McLennan Companies, Inc. | PERTH | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | ||||||
Marsh And Mclennan Company Private LIMITEDMarsh And Mclennan Company Private LIMITEDNational HQ | Gurugram, India | Peter J Phillips | marsh.com | 6411 | Insurance Agents, Brokers, and Service | 1695 | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | MARSH AND MCLENNAN COMPANY PRIVATE LIMITED | Gurugram | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | ||||||
Marsh And Mclennan Company Private LIMITEDMarsh And Mclennan Company Private LIMITEDNational HQ | Bengaluru, India | 6411 | Insurance Agents, Brokers, and Service | 1695 | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | MARSH AND MCLENNAN COMPANY PRIVATE LIMITED | Bengaluru | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | ||||||||
Marsh USA INCMarsh USA INCNational HQ | Santiago, Chile | 9999 | Nonclassifiable Establishments | 1695 | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | Marsh Usa Inc | SANTIAGO | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | ||||||||
Marsh Risk Consulting LimitadaMarsh Risk Consulting Limitada | Santiago, Chile | 1996 | 12 | $410K | Partnership of unknown type | 7389 | Business Services, Not Elsewhere Classified | 1695 | Marsh Usa Inc | SANTIAGO | Chile | Marsh Usa Inc | SANTIAGO | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | ||||
Marsh Corredores De Seguros S.P.A.Marsh Corredores De Seguros S.P.A. | Santiago, Chile | 1993 | 253 | $8.2M | Corporation | Jose Ignacio Lathrop | 6411 | Insurance Agents, Brokers, and Service | 1695 | Marsh Usa Inc | SANTIAGO | Chile | Marsh Usa Inc | SANTIAGO | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | |||
Guy Carpenter & Company Corredores De Reaseguros LimitadaGuy Carpenter & Company Corredores De Reaseguros Limitada | Santiago, Chile | 2002 | 16 | $518K | Partnership of unknown type | Bernardo Bergalli Richero | 6411 | Insurance Agents, Brokers, and Service | 1695 | Marsh Usa Inc | SANTIAGO | Chile | Marsh Usa Inc | SANTIAGO | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | |||
Guy Carpenter & Company Perú Corredores De Reaseguros S.A.C.Guy Carpenter & Company Perú Corredores De Reaseguros S.A.C.National HQ | Lima, Peru | 2000 | 8 | $2.7M | Corporation | Erick John Lakatos Osorio Davila | 7389 | Business Services, Not Elsewhere Classified | 1695 | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | Guy Carpenter & Company Perú Corredores de Reaseguros S.A.C. | Lima | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | |||
Marsh & Mclennan Companies, INC.Marsh & Mclennan Companies, INC. | Denver, USA | 24 | marsh.com | 6411 | Insurance Agents, Brokers, and Service | 1689 | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | Marsh & McLennan Companies, Inc. | NEW YORK | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | ||||||
Mm Asistencias S.A.Mm Asistencias S.A.National HQ | Cidade Autónoma de Buenos Aires, Argentina | 1992 | 8 | $133K | Corporation | Matías Rosales | 6311 | Life Insurance | 1695 | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | MM ASISTENCIAS S.A. | Ciudad de Buenos Aires | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | |||
Mmb Consultores S.A.Mmb Consultores S.A.National HQ | Cidade Autónoma de Buenos Aires, Argentina | 1988 | 12 | $448K | Corporation | Alejandro Martín Guerrero | 8742 | Management Consulting Services | 1695 | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | MMB CONSULTORES S.A. | Ciudad de Buenos Aires | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | |||
Marsh Argentina S.R.L.Marsh Argentina S.R.L.National HQ | Cidade Autónoma de Buenos Aires, Argentina | 1993 | 4 | $623K | Corporation | Alejandro Martín Guerrero | marsh.com.ar | 6719 | Offices of Holding Companies, Not Elsewhere Classified | 1695 | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | MARSH ARGENTINA S.R.L. | Ciudad de Buenos Aires | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | ||
Marsh S.A.Marsh S.A.National HQ | Montevideo, Uruguay | 1999 | 5 | $162K | Corporation | Antonio Constantinidi | 6411 | Insurance Agents, Brokers, and Service | 1695 | MARSH ARGENTINA S.R.L. | Ciudad de Buenos Aires | Argentina | MARSH S.A. | Montevideo | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | |||
Marsh S.A.Marsh S.A.Local HQ | Cidade Autónoma de Buenos Aires, Argentina | 2003 | 310 | $35.1M | Corporation | Matías Rosales | marsh.com/ar/es/home.html | 6411 | Insurance Agents, Brokers, and Service | 1695 | MARSH ARGENTINA S.R.L. | Ciudad de Buenos Aires | Argentina | MARSH ARGENTINA S.R.L. | Ciudad de Buenos Aires | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | ||
Marsh S.A.Marsh S.A. | Mendoza, Argentina | latinamerica.marsh.com | 6411 | Insurance Agents, Brokers, and Service | 1695 | MARSH S.A. | Ciudad de Buenos Aires | Argentina | MARSH ARGENTINA S.R.L. | Ciudad de Buenos Aires | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | |||||||
Marsh S.A.Marsh S.A. | Rosário, Argentina | marsh.com.ar | 6411 | Insurance Agents, Brokers, and Service | 1695 | MARSH S.A. | Ciudad de Buenos Aires | Argentina | MARSH ARGENTINA S.R.L. | Ciudad de Buenos Aires | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | |||||||
Marsh S.A.Marsh S.A. | Mar del Plata, Argentina | 6411 | Insurance Agents, Brokers, and Service | 1695 | MARSH S.A. | Ciudad de Buenos Aires | Argentina | MARSH ARGENTINA S.R.L. | Ciudad de Buenos Aires | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | ||||||||
Marsh S.A.Marsh S.A. | Neuquén, Argentina | 6411 | Insurance Agents, Brokers, and Service | 1695 | MARSH S.A. | Ciudad de Buenos Aires | Argentina | MARSH ARGENTINA S.R.L. | Ciudad de Buenos Aires | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | ||||||||
Carpenter Marsh Fac Re LLCCarpenter Marsh Fac Re LLC | Hoboken, USA | 2006 | 1 | $733K | Corporation | guycarp.com | 7389 | Business Services, Not Elsewhere Classified | 1689 | MARSH S.A. | Ciudad de Buenos Aires | Argentina | Marsh & McLennan Companies, Inc. | NEW YORK | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | |||
Skop Design LIMITEDSkop Design LIMITEDNational HQ | Dublin, Ireland | 2016 | 6 | $663K | Corporation | Niall Mallin | 3999 | Manufacturing Industries, Not Elsewhere Classified | 1695 | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | SKOP DESIGN LIMITED | DUBLIN | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | |||
Marsh USA LLCMarsh USA LLCLocal HQ | New York City, USA | 1969 | 38,000 | $935.0M | Corporation | Joseph Mc Sweeny | marshmclennan.com | 6411 | Insurance Agents, Brokers, and Service | 1689 | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | Marsh & McLennan Companies, Inc. | NEW YORK | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | ||
Marsh Peru S.A.C. Corredores De SegurosMarsh Peru S.A.C. Corredores De SegurosNational HQ | San Isidro, Peru | 2020 | 765 | $69.4M | Corporation | Nicolas Delgado Gonzales | marsh.com | 7389 | Business Services, Not Elsewhere Classified | 1695 | Marsh USA LLC | NEW YORK | United States of America | Marsh Peru S.A.C. Corredores de Seguros | San Isidro | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | ||
Carpenter Marsh Fac Peru Corredores De Reaseguros S.A.C.Carpenter Marsh Fac Peru Corredores De Reaseguros S.A.C. | Lima, Peru | 2008 | 23 | $7.4M | Corporation | Francisco Fabian Palacio Abello | 6411 | Insurance Agents, Brokers, and Service | 1695 | Marsh Peru S.A.C. Corredores de Seguros | San Isidro | Peru | Marsh Peru S.A.C. Corredores de Seguros | San Isidro | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | |||
Marsh USA LLCMarsh USA LLC | Newport, USA | 4 | Bob Peck | millstreetinn.com | 6411 | Insurance Agents, Brokers, and Service | 1689 | Marsh USA LLC | NEW YORK | United States of America | Marsh & McLennan Companies, Inc. | NEW YORK | Marsh & McLennan Companies, Inc. | NEW YORK | United States of America | |||||
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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.
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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.
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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.

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