{ "schemaVersion": "1.3.0", "language": "en", "slug": "marsh-mclennan", "brandKey": "marshmclennan", "canonicalName": "Marsh McLennan", "canonicalUrl": "https://worldbrand.ai/brand-wiki/marsh-mclennan", "jsonUrl": "https://worldbrand.ai/brand-wiki/marsh-mclennan/json", "markdownUrl": "https://worldbrand.ai/brand-wiki/marsh-mclennan/md", "name": "Marsh McLennan", "oneLiner": "Marsh McLennan is a global professional services group specializing in insurance brokerage, risk management, reinsurance, human-capital consulting, investment advisory, and management consulting.", "summary": "Marsh McLennan is an American professional services group headquartered in New York City. It operates through four principal businesses: Marsh, Marsh Re, Mercer, and Oliver Wyman. Together, these businesses advise organizations on insurance placement, risk financing, catastrophe and reinsurance exposure, employee benefits, retirement programs, investments, workforce strategy, economic analysis, and corporate management.\n\nThe company traces its origins to the insurance brokerage business established by Henry W. Marsh in Chicago in 1871, after the Great Chicago Fire disrupted the local insurance market. In 1905, Marsh combined his business with that of Donald R. McLennan to create Burroughs, Marsh & McLennan; the company adopted the Marsh & McLennan name in 1906. Its subsequent development combined organic growth with acquisitions in brokerage, reinsurance, investment management, human resources, and strategy consulting.\n\nMarsh McLennan's major operating brands have distinct roles. Marsh is its insurance brokerage and risk-advisory business, helping commercial and public-sector clients identify exposures, purchase insurance, structure alternative risk-financing arrangements, and manage claims and risk programs. Marsh Re, historically associated with Guy Carpenter, acts as a reinsurance intermediary and adviser for insurers and other risk carriers. Mercer advises employers, institutions, and investors on health benefits, retirement and pension arrangements, investment matters, workforce transformation, and talent strategy. Oliver Wyman provides management consulting, with work spanning financial services, operations, strategy, public policy, risk, and sector-specific transformation; its group also includes Lippincott and NERA Economic Consulting.\n\nThe company became publicly traded in 1962 and later adopted a holding-company structure that allowed its operating businesses to retain specialized identities. Its portfolio expanded significantly through the acquisitions of Guy Carpenter, Mercer, Johnson & Higgins, Oliver Wyman, and Jardine Lloyd Thompson. It also exited businesses that were less central to its long-term focus, including Putnam Investments and Kroll. These moves progressively concentrated the group on risk, insurance, people, and management advisory services.\n\nMarsh McLennan faced a major reputational and legal crisis in the mid-2000s when its Marsh brokerage unit was accused by New York authorities of bid rigging and conflicts of interest in commercial insurance placement. In 2005, the company agreed to an $850 million settlement and client-compensation arrangement. The episode prompted changes to brokerage practices and accelerated a strategic emphasis on risk and consulting services.\n\nThe company was deeply affected by the September 11, 2001 attacks: Marsh occupied much of the impact zone in the North Tower of the World Trade Center and lost 295 employees and 63 contractors. A memorial to those killed is located near the company's New York headquarters.\n\nIn 2021, the corporate identity changed from Marsh & McLennan Companies to Marsh McLennan. The group continued expanding its insurance-brokerage platform, including the acquisition of Jardine Lloyd Thompson in 2019 and McGriff Insurance Services in 2024. In 2025, its subsidiaries were reported as being rebranded under the Marsh name. Marsh McLennan is widely regarded as the world's largest insurance broker and combines a large-scale insurance platform with global consulting capabilities.\n\nMarsh McLennan, historically known as Marsh & McLennan Companies, is a United States-based professional services group headquartered in New York City. Its principal activities span insurance brokerage, risk management, reinsurance intermediation, employee benefits, retirement and investment consulting, organizational and human-capital advisory, and management consulting. The group operates through four principal businesses: Marsh, Marsh Re, Mercer, and Oliver Wyman. It is widely described as the world's largest insurance broker.\n\nThe company's origins date to Chicago in 1905, when Henry W. Marsh and Donald R. McLennan combined their respective businesses. Henry Marsh had established an insurance-related business after the Great Chicago Fire, when the failure of many insurers highlighted the need for professional risk advice and brokerage. The combined enterprise adopted the Marsh & McLennan name in 1906. Over the following decades, the group expanded beyond traditional insurance placement by acquiring or building businesses in reinsurance, employee benefits, investment consulting, and management consulting.\n\nGuy Carpenter, founded in 1923 and acquired by Marsh & McLennan in the same decade, became the foundation of the group's reinsurance-intermediary activities. Mercer was acquired in 1959 and developed into a major provider of employer consulting, including health benefits, retirement plans, pensions, investment advice, and workforce strategy. The company became publicly traded through an initial public offering in 1962 and adopted a holding-company structure in 1969, allowing separately managed businesses to serve clients under distinct specialist brands.\n\nThe group strengthened its insurance-brokerage position through the 1997 acquisition of Johnson & Higgins, a major competitor at the time. Its consulting platform also evolved through the combination of Temple, Barker & Sloane, Strategic Planning Associates, Mercer Management Consulting, and related businesses. The 2003 acquisition of Oliver Wyman created a stronger management-consulting presence, particularly in financial services and other complex industries. In 2007, several Mercer consulting units were consolidated into Oliver Wyman, while Putnam Investments was sold as the company concentrated on risk, insurance, and human-capital services. Kroll was subsequently divested in 2010.\n\nMarsh McLennan suffered a major human loss during the September 11, 2001 attacks. Its Marsh offices occupied floors 93 through 100 of the World Trade Center's North Tower, and the company lost 295 employees and 63 contractors. A memorial is located near the group's New York headquarters.\n\nThe company faced a severe reputational and legal crisis during the 2004 insurance-industry bid-rigging investigation. New York Attorney General Eliot Spitzer alleged that Marsh's compensation arrangements and placement practices compromised its neutrality as an insurance broker. Marsh agreed in early 2005 to pay $850 million to settle the case and compensate affected commercial-insurance clients. The episode prompted organizational changes and reinforced the group's focus on risk and consulting services.\n\nIn more recent years, the company has pursued scale in insurance distribution and specialist advice. It acquired Jardine Lloyd Thompson in 2019 for £4.3 billion, rebranded as Marsh McLennan in 2021, and acquired McGriff Insurance Services in 2024 for $7.75 billion. In 2025, its subsidiaries were rebranded under the Marsh name, including the former Guy Carpenter business as Marsh Re. Based on the cited reference material, 2025 revenue was distributed approximately 54% to Marsh, 10% to Marsh Re, 23% to Mercer, and 13% to Oliver Wyman. The group therefore combines a dominant insurance and risk platform with substantial consulting and human-capital operations.\n\nIn 2021, the company changed its name from Marsh & McLennan Companies to Marsh McLennan. The group continued to expand its insurance-brokerage platform, including the 2019 acquisition of Jardine Lloyd Thompson and the 2024 acquisition of McGriff Insurance Services. In 2025, its subsidiaries were reported to be rebranded under the Marsh name, including the former Guy Carpenter business as Marsh Re. According to the cited reference material, 2025 revenue was roughly allocated as follows: Marsh 54%, Marsh Re 10%, Mercer 23%, and Oliver Wyman 13%. Marsh McLennan is widely regarded as the world's largest insurance broker, combining a large-scale insurance platform with global consulting capabilities.", "aliases": [ "Marsh & McLennan Companies", "Marsh & McLennan Companies, Inc.", "MMC", "Marsh" ], "entityType": "corporate_brand", "l1Slug": "other", "l1": "Other", "l2Slug": "catch-all", "l2": "Catch-all", "l3Slug": "general-companies", "l3": "General Companies", "l4Slug": "companies-general", "l4": "Companies (General)", "country": "United States", "headquarters": "New York City, New York, United States", "operatingMarkets": [ "North America", "Latin America", "Europe", "Asia-Pacific", "Middle East", "Africa", "Global" ], "foundedYear": 1905, "founder": "Henry W. Marsh · Donald R. McLennan", "website": "https://www.marshmclennan.com/", "websiteHost": "marshmclennan.com", "parentCompany": null, "owner": null, "groupOrHouse": "Marsh McLennan", "listedStatus": "public", "ticker": "NYSE: MMC", "status": "active", "enrichmentStatus": "wiki_ok", "typicalProducts": [ "Commercial insurance brokerage", "Risk management advisory", "Reinsurance brokerage and advisory", "Employee benefits consulting", "Retirement and pension consulting", "Investment advisory", "Talent and workforce consulting", "Management consulting", "Economic consulting", "Insurance analytics and catastrophe modeling", "Alternative risk financing", "Insurance program management", "Commercial insurance broking", "Risk management consulting", "Reinsurance intermediation", "Risk analytics and modeling", "Human-capital and organizational consulting" ], "flagshipOfferings": [ "Marsh insurance brokerage and risk-management services", "Marsh Re reinsurance intermediary and advisory services", "Mercer health, retirement, investment, and workforce consulting", "Oliver Wyman strategy and management consulting", "NERA Economic Consulting economic and regulatory analysis", "Lippincott brand and customer-experience consulting", "Marsh", "Marsh Re", "Mercer", "Lippincott" ], "positioning": "A global, multi-specialist professional services group that combines insurance intermediation and risk expertise with human-capital, investment, economic, and management consulting. Its positioning is centered on helping organizations understand uncertainty, transfer or finance risk, manage workforces, and make complex strategic decisions.\n\nA global specialist-services group positioned at the intersection of insurance, enterprise risk, human capital, investment advisory, and management consulting. Its differentiation rests on the scale of Marsh's brokerage network, the technical reinsurance expertise of Marsh Re, Mercer's employer and workforce advisory capabilities, and Oliver Wyman's strategy and industry consulting platform.", "wikiPathKey": "Marsh_McLennan", "wikiTitle": "Marsh McLennan", "wikidataId": null, "sameAs": [ "https://www.marshmclennan.com/", "https://en.wikipedia.org/wiki/Marsh_McLennan" ], "claimStatus": "unverified", "updatedAt": "2026-10-14T02:40:45.861Z", "generatedAt": "2026-08-21T22:17:28.067Z", "executives": [ { "name": "John Doyle", "title": "President and Chief Executive Officer", "isCurrent": true, "startYear": 2023, "endYear": null }, { "name": "John Doyle", "title": "President and Chief Executive Officer of Marsh", "isCurrent": false, "startYear": 2017, "endYear": 2022 }, { "name": "Brian Duperreault", "title": "Chief Executive Officer", "isCurrent": false, "startYear": 2008, "endYear": null }, { "name": "Dan Glaser", "title": "President and Chief Executive Officer", "isCurrent": false, "startYear": null, "endYear": 2022 } ], "news": [ { "headline": "Marsh agrees to settle insurance bid-rigging allegations", "year": 2005, "summary": "Marsh agreed to pay $850 million to resolve a lawsuit brought by New York Attorney General Eliot Spitzer and to compensate clients affected by commercial-insurance placement practices from 2001 through 2004.", "tags": [ "scandal", "lawsuit" ], "isScandal": true, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "headline": "Settlement and client compensation", "year": 2005, "summary": "Marsh agreed to pay $850 million to resolve the New York lawsuit and compensate eligible clients for commercial insurance arranged during the relevant period. The matter contributed to changes in the company's brokerage practices and strategic organization.", "tags": [ "scandal" ], "isScandal": true, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "headline": "Insurance bid-rigging and broker-compensation controversy", "year": 2004, "summary": "Marsh's insurance-brokerage business became a central subject of an investigation into bid rigging and contingent compensation practices affecting the insurance industry. New York Attorney General Eliot Spitzer alleged that Marsh's arrangements and placement practices could prevent it from acting as an unbiased broker and could increase client costs while increasing Marsh's revenue. The company agreed in early 2005 to pay $850 million to settle the lawsuit and compensate commercial-insurance clients whose policies had been arranged between 2001 and 2004. The controversy led to internal reorganization and a renewed focus on insurance services and consulting.", "tags": [ "scandal" ], "isScandal": true, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "headline": "September 11 World Trade Center losses", "year": 2001, "summary": "Marsh occupied eight floors of the North Tower of the World Trade Center, including floors 93 through 100. The aircraft impact destroyed or blocked the stairways and elevators serving the impact area. The company lost 295 employees and 63 contractors. A memorial to those killed is located near the company's New York headquarters.", "tags": [ "scandal" ], "isScandal": true, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "headline": "Marsh McLennan subsidiary brands are reported as being rebranded under Marsh", "year": 2025, "summary": "The company was reported as rebranding its subsidiaries under the Marsh name, extending the corporate brand architecture across the group.", "tags": [ "other" ], "isScandal": false, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "headline": "Marsh McLennan reports a diversified 2025 operating portfolio", "year": 2025, "summary": "Reference material attributed approximately 54% of 2025 revenue to Marsh, 10% to Marsh Re, 23% to Mercer, and 13% to Oliver Wyman.", "tags": [ "other" ], "isScandal": false, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "headline": "Marsh McLennan rebrands subsidiaries under Marsh", "year": 2025, "summary": "The group's subsidiaries were rebranded under the Marsh name, with the former Guy Carpenter business identified as Marsh Re.", "tags": [ "other" ], "isScandal": false, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "headline": "Marsh McLennan acquires McGriff Insurance Services", "year": 2024, "summary": "The company acquired McGriff Insurance Services for $7.75 billion, strengthening its insurance-distribution platform.", "tags": [ "mna" ], "isScandal": false, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "headline": "John Doyle becomes chief executive of Marsh McLennan", "year": 2023, "summary": "John Doyle, previously president and chief executive of Marsh, succeeded Dan Glaser as president and chief executive of the parent group on January 1, 2023.", "tags": [ "leadership_change" ], "isScandal": false, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "headline": "Marsh & McLennan adopts the Marsh McLennan corporate identity", "year": 2021, "summary": "The company rebranded from Marsh & McLennan Companies to Marsh McLennan, creating a unified corporate identity while retaining major operating brands.", "tags": [ "other" ], "isScandal": false, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "headline": "Marsh & McLennan Companies rebrands as Marsh McLennan", "year": 2021, "summary": "The company adopted Marsh McLennan as its corporate brand, linking the parent identity more closely with its best-known operating business.", "tags": [ "other" ], "isScandal": false, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "headline": "Marsh McLennan completes acquisition of Jardine Lloyd Thompson", "year": 2019, "summary": "The group acquired insurance broker and adviser Jardine Lloyd Thompson for £4.3 billion, materially expanding its brokerage and risk-services scale.", "tags": [ "mna" ], "isScandal": false, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "headline": "Marsh & McLennan sells Kroll to Altegrity", "year": 2010, "summary": "The company sold its corporate intelligence and investigative unit Kroll to Altegrity, continuing a program of divestitures outside its core advisory businesses.", "tags": [ "mna" ], "isScandal": false, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "headline": "Marsh receives first wholly owned foreign insurance-brokerage license in China", "year": 2007, "summary": "Marsh received the first reported license for a wholly owned foreign company to operate an insurance-brokerage business in China.", "tags": [ "regulation" ], "isScandal": false, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "headline": "Marsh McLennan sells Putnam Investments", "year": 2007, "summary": "The group sold Putnam Investments to Power Financial as part of a strategy to concentrate on risk, insurance, and human-capital businesses.", "tags": [ "mna" ], "isScandal": false, "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" } ], "encyclopedia": { "history": "Marsh McLennan developed from an insurance brokerage founded by Henry W. Marsh in Chicago in 1871. Marsh established the business after the Great Chicago Fire disrupted the insurance market and caused many insurers to fail. In 1905, Henry W. Marsh and Donald R. McLennan combined their businesses to form Burroughs, Marsh & McLennan. The company was renamed Marsh & McLennan in 1906.\n\nThe group broadened its insurance capabilities through the 1923 acquisition of Guy Carpenter, a reinsurance intermediary founded the previous year. Mercer was acquired in 1959, adding human-resources and employee-benefits consulting. Marsh & McLennan became a public company through an initial public offering in 1962. In 1969, it reorganized as a holding company, allowing its businesses to operate under specialized identities while sharing ownership and strategic direction.\n\nThe company entered investment management in 1970 through the acquisition of Putnam Investments. It later expanded its management-consulting activities by acquiring Temple, Barker & Sloane in 1987 and merging with Strategic Planning Associates in 1989. Those consulting operations were combined in 1990 to form Mercer Management Consulting. In 1997, the $1.8 billion acquisition of Johnson & Higgins substantially increased the scale of the insurance-brokerage business and helped Marsh & McLennan regain the position of the world's largest insurance broker.\n\nMercer acquired Delta Consulting Group in 2000 for organizational-development and change-management expertise. The September 11 attacks had a devastating effect on the company: Marsh occupied eight floors of the World Trade Center's North Tower, including the floors across the aircraft impact zone. The company lost 295 employees and 63 contractors. A memorial is located beside the group's New York headquarters.\n\nIn 2003, Marsh & McLennan acquired Oliver Wyman, a consulting firm with a strong financial-services practice. In 2004, its Marsh brokerage operation became involved in a major insurance-industry bid-rigging and contingent-commission controversy. New York Attorney General Eliot Spitzer alleged that Marsh had not acted as an impartial broker and that the arrangements could raise client costs while increasing broker revenue. In early 2005, Marsh agreed to an $850 million settlement and compensation program. The crisis led to operational changes and reinforced the group's focus on insurance services and consulting.\n\nThe company received a significant regulatory milestone in China in 2007, when Marsh obtained the first license reported for a wholly owned foreign insurance-brokerage company there. That year, three Mercer consulting units were combined into Oliver Wyman. Marsh & McLennan also sold Putnam Investments to Power Financial for $3.9 billion, emphasizing its core risk and human-capital activities. In 2010, it sold Kroll to Altegrity for $1.13 billion after divesting several smaller Kroll operations.\n\nBrian Duperreault became chief executive in 2008. John Doyle led Marsh as president and chief executive from 2017 to 2022 and became chief executive of the parent company on January 1, 2023, succeeding Dan Glaser. The group expanded through the acquisition of Jardine Lloyd Thompson in 2019, a transaction valued at £4.3 billion in the available reference material.\n\nIn April 2021, Marsh & McLennan Companies adopted Marsh McLennan as its corporate name and brand identity. The group subsequently acquired McGriff Insurance Services in November 2024 for $7.75 billion. The available reference material also reports a 2025 rebranding of subsidiaries under the Marsh name. By this period, the business consisted principally of Marsh, Marsh Re, Mercer, and Oliver Wyman. The insurance and risk businesses remained the largest part of the group, while consulting provided a substantial second platform. Marsh McLennan continues to operate as a global professional services company and is identified as the world's largest insurance broker.\n\nMarsh McLennan began in Chicago in 1905 through the merger of businesses established by Henry W. Marsh and Donald R. McLennan. Marsh's earlier business emerged in the aftermath of the Great Chicago Fire, when widespread insurer failures increased demand for professional insurance advice. The combined company became known as Marsh & McLennan in 1906.\n\nThe group expanded its insurance capabilities through the acquisition of Guy Carpenter in 1923. Founded by Guy Carpenter one year earlier, the firm became a major reinsurance intermediary and adviser. In 1959, Marsh acquired Mercer, adding a human-resources and employee-consulting business that later grew into a global platform covering health benefits, retirement, pensions, investments, and workforce strategy.\n\nMarsh & McLennan became a public company through an initial public offering in 1962. In 1969, it reorganized as a holding company whose businesses operated through separately managed specialist companies. The group entered investment management through the 1970 acquisition of Putnam Investments. It later broadened its consulting operations through the acquisition of Temple, Barker & Sloane in 1987 and the merger with Strategic Planning Associates in 1989. Those consulting activities were combined in 1990 to form Mercer Management Consulting.\n\nThe 1997 acquisition of Johnson & Higgins for $1.8 billion substantially increased Marsh's insurance-brokerage scale and restored the group to a leading position over Aon in global brokerage. Mercer acquired Delta Consulting Group in 2000, adding organizational-development and change-management capabilities. The September 11 attacks caused an exceptional loss for the company: Marsh's North Tower offices occupied floors 93 through 100, and 295 employees and 63 contractors died.\n\nMarsh & McLennan acquired Oliver Wyman in 2003. In 2004, Marsh's brokerage business became involved in an industry-wide bid-rigging controversy. New York Attorney General Eliot Spitzer alleged that the broker's compensation and placement practices could lead to conflicts of interest and higher client costs. Marsh settled the lawsuit in early 2005 for $850 million, including client compensation. The episode led to organizational changes and a sharper emphasis on insurance services and consulting.\n\nThe group expanded internationally in 2007 when Marsh received a Chinese license for a wholly owned foreign insurance brokerage. That year, Mercer consulting units were consolidated into Oliver Wyman, while Putnam Investments was sold to Power Financial for $3.9 billion. Brian Duperreault became chief executive in 2008. The company sold Kroll to Altegrity in 2010 after divesting several related activities, continuing its focus on core risk and consulting businesses.\n\nIn 2019, Marsh McLennan acquired Jardine Lloyd Thompson for £4.3 billion. The company adopted the Marsh McLennan corporate name in 2021. John Doyle, who led Marsh from 2017 to 2022, became president and chief executive of the parent company on January 1, 2023. The group announced the acquisition of McGriff Insurance Services for $7.75 billion in 2024. Reference material for 2025 describes further brand consolidation under Marsh, including the renaming of Guy Carpenter as Marsh Re. The modern group combines insurance brokerage and risk services, reinsurance, human-capital consulting, and management consulting through its four principal operating businesses.", "milestones": [ { "year": 1871, "title": "Henry W. Marsh establishes an insurance business in Chicago", "summary": "The business was founded in the aftermath of the Great Chicago Fire, when widespread insurer failures increased demand for professional insurance advice, and became the historical starting point of Marsh McLennan.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 1905, "title": "Burroughs, Marsh & McLennan is formed", "summary": "Henry W. Marsh and Donald R. McLennan merged their businesses in Chicago.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 1906, "title": "The company adopts the Marsh & McLennan name", "summary": "The merged enterprise was renamed Marsh & McLennan.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 1923, "title": "Guy Carpenter joins the group", "summary": "Marsh acquired Guy Carpenter, founded in 1922, establishing a major reinsurance-intermediary capability.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 1959, "title": "Mercer is acquired", "summary": "The acquisition of Mercer expanded the group into human-resources and employer consulting.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 1962, "title": "Initial public offering", "summary": "Marsh & McLennan became a publicly traded company.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 1969, "title": "Holding-company reorganization", "summary": "The company reorganized so that separately managed operating businesses could serve clients under distinct banners.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 1970, "title": "Putnam Investments is acquired", "summary": "The acquisition expanded the group into mutual-fund and investment-management activities.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 1997, "title": "Johnson & Higgins is acquired", "summary": "The $1.8 billion acquisition significantly strengthened the insurance-brokerage operation and helped the company move ahead of Aon as the world's largest insurance broker.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2001, "title": "Marsh loses employees in the September 11 attacks", "summary": "The company's World Trade Center offices occupied eight floors of the North Tower, including floors 93 through 100 across the aircraft impact zone; 295 employees and 63 contractors were killed.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2003, "title": "Oliver Wyman is acquired", "summary": "The acquisition expanded the group's management-consulting platform, especially in financial services.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2005, "title": "Insurance-brokerage settlement", "summary": "Marsh agreed to an $850 million settlement and client-compensation arrangement related to bid-rigging allegations.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2007, "title": "Putnam Investments is sold", "summary": "The company sold Putnam to Power Financial for $3.9 billion and refocused on risk, insurance, and human-capital services.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2010, "title": "Kroll is sold", "summary": "Kroll was sold to Altegrity for $1.13 billion after several smaller Kroll operations had been divested, as part of the group's portfolio concentration strategy.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2019, "title": "Jardine Lloyd Thompson is acquired", "summary": "The acquisition, valued at £4.3 billion, expanded the group's international insurance brokerage and employee-benefits businesses.\n\nMarsh McLennan acquired Jardine Lloyd Thompson for £4.3 billion.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2021, "title": "Corporate rebrand to Marsh McLennan", "summary": "In April 2021, the corporate name changed from Marsh & McLennan Companies to Marsh McLennan.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2024, "title": "McGriff Insurance Services is acquired", "summary": "In November 2024, the group acquired McGriff Insurance Services for $7.75 billion, further expanding its insurance-distribution platform.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 1905, "title": "Marsh and McLennan businesses merge", "summary": "Henry W. Marsh and Donald R. McLennan combined their Chicago businesses to form the company that became Marsh & McLennan.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 1987, "title": "Temple, Barker & Sloane is acquired", "summary": "The acquisition strengthened Marsh & McLennan's management-consulting activities.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 1989, "title": "Strategic Planning Associates joins the group", "summary": "The Washington, D.C.-based strategy consultancy merged with Marsh & McLennan.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 1990, "title": "Mercer Management Consulting is formed", "summary": "Temple, Barker & Sloane and Strategic Planning Associates were combined into Mercer Management Consulting.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2007, "title": "China brokerage license and consulting consolidation", "summary": "Marsh obtained the first license reported for a wholly owned foreign insurance-brokerage company in China, while three Mercer consulting units were combined into Oliver Wyman.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2025, "title": "Subsidiary brands consolidated under Marsh", "summary": "Reference material describes the rebranding of subsidiaries under the Marsh identity, including the former Guy Carpenter business as Marsh Re.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2000, "title": "Mercer acquires Delta Consulting Group", "summary": "The acquisition added organizational-development and change-management expertise.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2008, "title": "Brian Duperreault becomes chief executive", "summary": "Brian Duperreault became chief executive of Marsh & McLennan.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2023, "title": "John Doyle becomes chief executive of the parent company", "summary": "John Doyle, who led Marsh as president and chief executive from 2017 to 2022, became chief executive of the parent company on January 1, 2023, succeeding Dan Glaser.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" } ], "products": [ { "name": "Marsh", "category": "Insurance brokerage and risk management", "description": "Marsh is the group's principal insurance brokerage and risk-advisory business. It helps companies, governments, and institutions identify and quantify exposures, arrange commercial insurance, design insurance programs, manage claims, use analytical models, and structure alternative risk-financing solutions. It is the largest operating business in the group and represents the core of Marsh McLennan's global insurance platform. The business accounted for approximately 54% of group revenue in the 2025 figures cited in the reference material.\n\nMarsh is the group's principal insurance-brokerage and risk-advisory business. It helps commercial and institutional clients identify, quantify, finance, and transfer risk. Its activities include insurance broking, risk consulting, insurance-program management, analytical modeling, and alternative risk-financing arrangements. The business accounted for approximately 54% of group revenue in the 2025 figures cited in the reference material.", "launchedYear": null, "status": "active" }, { "name": "Marsh Re", "category": "Reinsurance brokerage and advisory", "description": "Marsh Re is the group's reinsurance intermediary and advisory business, historically known as Guy Carpenter. It works with insurers and other risk carriers on reinsurance placement, capital and risk strategy, catastrophe exposure, analytics, and the design of structures that transfer or finance insurance risk. The business represented approximately 10% of 2025 group revenue according to the cited reference material.\n\nMarsh Re is the group's reinsurance-intermediation and advisory platform, formerly known as Guy Carpenter. It advises insurers and other risk-bearing organizations on reinsurance structures, catastrophe exposure, capital management, analytics, and related risk-transfer solutions. The business represented approximately 10% of 2025 group revenue according to the cited reference material.", "launchedYear": 1922, "status": "active" }, { "name": "Mercer", "category": "Human-capital and investment consulting", "description": "Mercer advises employers, pension sponsors, institutions, and investors on health benefits, retirement and pension programs, investment strategy, workforce transformation, talent, rewards, and organizational effectiveness. It provides the group's principal human-capital and employee-benefits platform and complements Marsh's corporate risk expertise. It grew from the human-resources consulting business acquired by Marsh in 1959 and remains one of the group's principal operating companies. Mercer represented approximately 23% of 2025 group revenue in the cited reference material.\n\nMercer advises employers and institutions on employee health benefits, retirement and pension plans, investment strategy, workforce effectiveness, compensation, and broader human-capital questions. It grew from the human-resources consulting business acquired by Marsh in 1959 and remains one of the group's principal operating companies. Mercer represented approximately 23% of 2025 group revenue in the cited reference material.", "launchedYear": null, "status": "active" }, { "name": "Oliver Wyman", "category": "Management consulting", "description": "Oliver Wyman is the group's global management-consulting business. Its work includes corporate and business-unit strategy, financial-services consulting, risk, operations, organizational transformation, public-sector advice, and sector-specific performance improvement. The broader platform includes Lippincott and NERA Economic Consulting.\n\nOliver Wyman provides strategy, operations, organization, risk, and transformation consulting. It has a notable financial-services orientation but serves clients across multiple industries. The platform includes Lippincott and NERA Economic Consulting and incorporates consulting activities consolidated from several Mercer units in 2007. Oliver Wyman represented approximately 13% of 2025 group revenue in the cited reference material.\n\nOliver Wyman is the group's global management-consulting business. Its work includes corporate and business-unit strategy, financial-services consulting, risk, operations, organizational transformation, public-sector advice, and sector-specific performance improvement. The broader platform includes Lippincott and NERA Economic Consulting and incorporates consulting activities consolidated from several Mercer units in 2007. Oliver Wyman represented approximately 13% of 2025 group revenue in the cited reference material.", "launchedYear": 1984, "status": "active" }, { "name": "NERA Economic Consulting", "category": "Economic and regulatory consulting", "description": "NERA Economic Consulting provides economic analysis, competition and regulatory advice, litigation support, financial analysis, and expert testimony. It operates within the Oliver Wyman consulting platform and serves clients facing complex legal, policy, market, and regulatory questions. The cited material identifies NERA as part of Oliver Wyman without supplying separate product-launch information.\n\nNERA Economic Consulting operates within the Oliver Wyman platform and provides economic analysis and expert advice for competition, regulation, litigation, policy, and other complex commercial matters. The cited material identifies NERA as part of Oliver Wyman without supplying separate product-launch information.", "launchedYear": null, "status": "active" }, { "name": "Lippincott", "category": "Brand and design consulting", "description": "Lippincott is a brand and design consultancy associated with Oliver Wyman. Its work covers brand strategy, identity, customer experience, innovation, and the design of market-facing experiences for companies and institutions. The available reference material identifies it as part of Oliver Wyman but does not provide a separate founding or launch date for its position within the group.\n\nLippincott is part of the Oliver Wyman consulting platform and provides brand, design, customer-experience, and identity-related advisory services. The available reference material identifies it as part of Oliver Wyman but does not provide a separate founding or launch date for its position within the group.", "launchedYear": null, "status": "active" } ], "campaigns": [], "scandals": [ { "year": 2004, "title": "Marsh insurance-brokerage bid-rigging controversy", "summary": "New York Attorney General Eliot Spitzer accused Marsh's brokerage operation of failing to act as an impartial intermediary and of participating in bid-rigging and compensation practices that could increase costs for commercial-insurance clients. The allegations formed part of a wider insurance-industry controversy involving other brokers and insurers.\n\nMarsh's insurance-brokerage business became a central subject of an investigation into bid rigging and contingent compensation practices affecting the insurance industry. New York Attorney General Eliot Spitzer alleged that Marsh's arrangements and placement practices could prevent it from acting as an unbiased broker and could increase client costs while increasing Marsh's revenue. The company agreed in early 2005 to pay $850 million to settle the lawsuit and compensate commercial-insurance clients whose policies had been arranged between 2001 and 2004. The controversy led to internal reorganization and a renewed focus on insurance services and consulting.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan", "sourceUrls": [ "https://en.wikipedia.org/wiki/Marsh_McLennan" ] }, { "year": 2005, "title": "Settlement and client compensation", "summary": "Marsh agreed to pay $850 million to resolve the New York lawsuit and compensate eligible clients for commercial insurance arranged during the relevant period, including policies arranged between 2001 and 2004. The matter contributed to changes in the company's brokerage practices and strategic organization.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan", "sourceUrls": [ "https://en.wikipedia.org/wiki/Marsh_McLennan" ] }, { "year": 2001, "title": "September 11 World Trade Center losses", "summary": "Marsh occupied eight floors of the North Tower of the World Trade Center, including floors 93 through 100. The aircraft impact destroyed or blocked the stairways and elevators serving the impact area. The company lost 295 employees and 63 contractors. A memorial to those killed is located near the company's New York headquarters.", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan", "sourceUrls": [ "https://en.wikipedia.org/wiki/Marsh_McLennan" ] } ], "decisions": [ { "year": 1969, "type": "strategy", "title": "Create a holding-company structure", "context": "The company had developed several specialized operating activities and sought a structure that would preserve distinct business identities.", "action": "Marsh & McLennan reorganized under a holding-company model with separately managed operating companies.", "aftermath": "The structure became a foundation for later expansion across insurance, reinsurance, human-capital, investment, and management consulting.", "financials": null, "competitorReactions": [], "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 1997, "type": "mna", "title": "Acquire Johnson & Higgins", "context": "The insurance-brokerage sector was consolidating and Johnson & Higgins was a major competitor.", "action": "Marsh & McLennan acquired Johnson & Higgins for $1.8 billion.", "aftermath": "The transaction materially enlarged the brokerage operation and helped the company move ahead of Aon as the world's largest insurance broker.", "financials": { "metric": "Acquisition value", "before": null, "after": "$1.8 billion", "period": "1997", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, "competitorReactions": [], "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2007, "type": "mna", "title": "Sell Putnam Investments", "context": "The group was concentrating on risk, insurance, and human-capital businesses rather than maintaining a broad investment-management portfolio.", "action": "Marsh & McLennan sold Putnam Investments to Power Financial.", "aftermath": "The divestiture reduced the group's exposure to mutual funds and supported a more focused professional-services strategy.\n\nThe divestiture simplified the portfolio and increased the strategic emphasis on the group's insurance and consulting operations.", "financials": { "metric": "Sale value", "before": null, "after": "$3.9 billion", "period": "2007", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, "competitorReactions": [], "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2019, "type": "mna", "title": "Acquire Jardine Lloyd Thompson", "context": "The acquisition was intended to expand the group's international brokerage and employee-benefits capabilities.", "action": "Marsh McLennan acquired Jardine Lloyd Thompson for £4.3 billion.", "aftermath": "The transaction expanded the group's international insurance and specialty-risk footprint.", "financials": { "metric": "Acquisition value", "before": null, "after": "£4.3 billion", "period": "2019", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, "competitorReactions": [], "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2021, "type": "strategy", "title": "Adopt the Marsh McLennan corporate brand", "context": "The company sought a corporate identity that connected the parent group with its best-known Marsh operating business while retaining specialist businesses.", "action": "Marsh & McLennan Companies changed its corporate name and brand identity to Marsh McLennan.", "aftermath": "The new identity positioned the group under a shorter, more recognizable corporate brand while its specialist businesses continued operating in their respective markets.", "financials": null, "competitorReactions": [], "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2024, "type": "mna", "title": "Acquire McGriff Insurance Services", "context": "Marsh McLennan continued expanding its insurance-distribution platform through acquisitions.", "action": "The company acquired McGriff Insurance Services.", "aftermath": "The acquisition added scale to the company's insurance-brokerage operations.\n\nThe transaction strengthened the group's insurance-brokerage presence.", "financials": { "metric": "Acquisition value", "before": null, "after": "$7.75 billion", "period": "November 2024", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, "competitorReactions": [], "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2025, "type": "strategy", "title": "Rebrand subsidiaries under Marsh", "context": "The group continued simplifying its brand architecture after adopting the Marsh McLennan corporate identity.", "action": "The company's subsidiaries were reported as being rebranded under the Marsh name.", "aftermath": "The change further emphasized Marsh as the common identity across the group's insurance-related businesses.", "financials": null, "competitorReactions": [], "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2005, "type": "strategy", "title": "Reorganize after the insurance-practices settlement", "context": "The bid-rigging and broker-compensation controversy created legal, regulatory, and reputational pressure on Marsh's brokerage model.", "action": "Marsh McLennan reorganized its activities and refocused the group around insurance services and consulting.", "aftermath": "The company paid $850 million to settle the lawsuit and compensate affected clients, while continuing to develop its risk and consulting businesses.", "financials": { "metric": "Settlement and client compensation", "before": null, "after": "$850 million", "period": "2005", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, "competitorReactions": [], "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2010, "type": "mna", "title": "Divest Kroll", "context": "The group was reducing exposure to businesses outside its central risk and consulting portfolio.", "action": "Marsh McLennan sold Kroll, its corporate intelligence and investigations unit, to Altegrity.", "aftermath": "The divestiture continued the company's concentration on core insurance, risk, human-capital, and consulting services.", "financials": { "metric": "Sale consideration", "before": null, "after": "$1.13 billion", "period": "2010", "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, "competitorReactions": [], "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "year": 2025, "type": "strategy", "title": "Consolidate subsidiary branding under Marsh", "context": "The group pursued greater brand consistency across its insurance and reinsurance operations.", "action": "Reference material describes the rebranding of subsidiaries under the Marsh name, including Guy Carpenter as Marsh Re.", "aftermath": "The change created a more unified Marsh identity across the group's insurance businesses.", "financials": null, "competitorReactions": [], "sourceUrl": "https://en.wikipedia.org/wiki/Marsh_McLennan" } ], "sources": [ { "title": "Marsh McLennan", "url": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "title": "Marsh McLennan corporate website", "url": "https://www.marshmclennan.com/" }, { "title": "http://www.mmc.com/", "url": "http://www.mmc.com/" } ], "needsReview": true }, "sources": [ { "title": "Marsh McLennan", "url": "https://en.wikipedia.org/wiki/Marsh_McLennan" }, { "title": "Marsh McLennan corporate website", "url": "https://www.marshmclennan.com/" }, { "title": "http://www.mmc.com/", "url": "http://www.mmc.com/" } ], "jsonLd": [ { "@context": "https://schema.org", "@type": [ "Organization", "Brand" ], "@id": "https://worldbrand.ai/brand-wiki/marsh-mclennan#entity", "name": "Marsh McLennan", "url": "https://worldbrand.ai/brand-wiki/marsh-mclennan", "description": "Marsh McLennan is a global professional services group specializing in insurance brokerage, risk management, reinsurance, human-capital consulting, investment advisory, and management consulting.", "sameAs": [ "https://www.marshmclennan.com/", "https://en.wikipedia.org/wiki/Marsh_McLennan" ], "foundingDate": 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