MARSH & MCLENNAN COMPANIES, INC.
Marsh & McLennan Companies, Inc. is incorporated in Delaware and is registered with the New York Department of State as a foreign business corporation (New York DOS ID 269538) since August 31, 1973, with a current status of Active. Its principal executive offices, as stated in its SEC filings, are at 1166 Avenue of the Americas, New York, New York 10036.
Marsh & McLennan Companies, Inc. is a global professional services company operating in the areas of risk, insurance broking, reinsurance, and consulting. Per its Form 10-K for the fiscal year ended December 31, 2025, filed with the U.S. Securities and Exchange Commission on February 9, 2026, the company is organized into two reportable segments: Risk and Insurance Services, which includes insurance broking and risk advisory (Marsh) and reinsurance broking and advisory (Guy Carpenter), and Consulting, which includes health, wealth and career consulting (Mercer) and management, economic and brand consulting businesses (Oliver Wyman, NERA Economic Consulting and Lippincott). The Risk and Insurance Services segment accounted for approximately 64% of 2025 revenue and the Consulting segment for approximately 36%.
Effective January 14, 2026, the company changed its New York Stock Exchange ticker symbol from MMC to MRSH in connection with a rebranding of the company and its operating businesses under the “Marsh” name, as announced in an official company press release. The company’s legal name, Marsh & McLennan Companies, Inc., and its CUSIP number remained unchanged as a result of this rebrand.
For the fiscal year ended December 31, 2025, Marsh & McLennan Companies, Inc. reported total revenue of approximately $27 billion and more than 95,000 colleagues advising clients in 130 countries, according to its Form 10-K. The company’s common stock continues to be listed on the New York Stock Exchange under ticker symbol MRSH.
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Shareholders
5
Marsh & McLennan Companies, Inc. is a widely held, publicly traded company, and the shareholder information available for this profile reflects a limited set of disclosed institutional holding positions rather than a complete share register, consistent with how ownership is reported for large NYSE-listed companies. As of the data snapshot dated September 4, 2026, the largest disclosed holders were institutional index funds, including a Vanguard 500 Index Fund position of approximately 4.16% of ordinary shares, a Vanguard Total Stock Market Index Fund position of approximately 5.30%, an iShares Core S&P 500 ETF position of approximately 2.11%, an SPDR S&P 500 ETF Trust position of approximately 2.02%, and a Fidelity 500 Index Fund position of approximately 2.13%, each described as a direct holding of ordinary shares.
This is broadly consistent with publicly available institutional-ownership data compiled from Schedule 13F filings, which show that the company’s largest beneficial holders are large asset managers, including Vanguard Group, BlackRock, and State Street, each reporting aggregate positions in the mid-single-digit percentage range across their various funds. No shareholder or group of related shareholders is reported as holding a controlling stake.
No individual ultimate beneficial owner has been identified for Marsh & McLennan Companies, Inc. Given that share ownership is dispersed among numerous institutional and index funds, none of which is reported at a level indicating control, no natural person meets a recognized beneficial-ownership or control threshold based on the available information.
The available shareholder information should be treated as a major-shareholders-only snapshot rather than a full register: it reflects reportable institutional positions as of the dates noted above and does not capture the complete base of retail and other holders of the company’s NYSE-listed common stock.
Officers
5
The officer information on file for Marsh & McLennan Companies, Inc. through its New York State foreign-qualification filing is limited to a small number of corporate officer records rather than a complete board of directors, and includes a company Secretary, a Director, a general corporate Officer, a historical Incorporator entry dating to the original 1973 filing, and Paul Beswick, listed as Senior Vice President, Chief Information & Operations Officer.
External verification through the company’s own leadership pages confirms that Paul Beswick is Senior Vice President and Global Chief Information and Operations Officer of Marsh, a role he has held since January 2025, after previously serving as Chief Information Officer from 2021 to 2025.
A verified recent officer change at Marsh & McLennan Companies, Inc. is the expansion of Mark McGivney’s responsibilities: effective April 15, 2026, Mr. McGivney, previously Chief Financial Officer, was additionally appointed Executive Vice President and Chief Operating Officer, continuing to also serve as Chief Financial Officer, as disclosed in the company’s Form 8-K and official press release.
Nationality is not disclosed for any of the officers named above; the New York State filing does not report this information, and it has not been inferred from names, addresses, or country of residence. Correspondence addresses shown in the officer records, such as 1166 Avenue of the Americas, New York, NY, and an address in Lowell, Massachusetts, are business or service addresses used for official filings and should not be read as officers’ places of residence.
Overall, officer disclosure for this company is best described as partial: the New York State registry record provides only a small number of filing-related officer entries, while more complete information on current executive officers and the board of directors is available through the company’s SEC filings, including its annual proxy statement, rather than through the state corporate registry.
Group Structure
Marsh & McLennan Companies, Inc. is a publicly traded company listed on the New York Stock Exchange and is not itself a subsidiary of another disclosed corporate parent; it is the top-level, ultimate parent entity of its own global group.
According to Exhibit 21.1 to the company’s Form 10-K for the fiscal year ended December 31, 2025, filed with the SEC on February 9, 2026, Marsh & McLennan Companies, Inc. has several hundred direct and indirect subsidiaries operating across many countries. Verified operating subsidiaries named in that filing include Marsh LLC (United States), Guy Carpenter & Company, LLC (United States), Oliver Wyman, LLC (United States), and NERA Economic Consulting GmbH (Germany), among many others. The Exhibit 21 filing lists subsidiary names and their jurisdictions of organization but does not disclose ownership percentages, so ownership percentage is not disclosed for these relationships.
Recent verified structural activity includes the completed acquisition of TriBridge Partners by Marsh McLennan Agency, a business of Marsh, effective June 1, 2026. Separately, Marsh McLennan Agency announced an agreement on August 10, 2026 to acquire Accel Holdings, Inc., with closing expected in the third quarter of 2026; as of the information date, this transaction had not yet completed and is a proposed rather than a current relationship.
Corporate-linkage information for this group is best described as partial: subsidiary names and jurisdictions are verified through the company’s own SEC filings, but ownership percentages are not disclosed in those filings, and the extensive subsidiary listing shown elsewhere in this profile has not been independently re-verified entity by entity for this overview.
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Frequently Asked Questions
Who owns MARSH & MCLENNAN COMPANIES, INC.?
Five shareholders are currently on record for MARSH & MCLENNAN COMPANIES, INC., reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing. The largest of these is VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund, holding 5.3% — the largest recorded stake — followed by VANGUARD INDEX FUNDS-Vanguard 500 Index Fund at 4.2%; the remaining 3 shareholders shown hold smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Who is MARSH & MCLENNAN COMPANIES, INC.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for MARSH & MCLENNAN COMPANIES, INC. is itself a company rather than a natural person, so no Ultimate Beneficial Owner (UBO) is identified at this level; establishing one would require tracing the ownership of each shareholding company in turn.
How many shareholders does MARSH & MCLENNAN COMPANIES, INC. have on record?
5 shareholders are shown on record for MARSH & MCLENNAN COMPANIES, INC.. The register reports 8 in total; only the top 5 by holding are shown here.
What is MARSH & MCLENNAN COMPANIES, INC.'s company registration number?
MARSH & MCLENNAN COMPANIES, INC.'s registration number is 269538, filed with New York Department of State — Division of Corporations in United States. Its current status on the register is active.
Is MARSH & MCLENNAN COMPANIES, INC. still an active company?
MARSH & MCLENNAN COMPANIES, INC.'s status on New York Department of State — Division of Corporations is listed as active.
When was MARSH & MCLENNAN COMPANIES, INC. incorporated?
MARSH & MCLENNAN COMPANIES, INC. was incorporated on 31 August 1973, according to New York Department of State — Division of Corporations.
What is MARSH & MCLENNAN COMPANIES, INC.'s registered address?
The registered address on file for MARSH & MCLENNAN COMPANIES, INC. is NEW YORK, United States.
Who are the officers/directors of MARSH & MCLENNAN COMPANIES, INC.?
The Director of MARSH & MCLENNAN COMPANIES, INC. on record is Carmen Fernandez; 5 officers are shown here, filed with New York Department of State — Division of Corporations. Management authority at MARSH & MCLENNAN COMPANIES, INC. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does MARSH & MCLENNAN COMPANIES, INC. have a parent company or subsidiaries?
MARSH & MCLENNAN COMPANIES, INC. has no recorded parent company — it sits at the top of its own group structure, with 208 subsidiaries recorded beneath it across 45 jurisdictions. Those 208 subsidiaries span United States, South Africa, Barbados, Switzerland, Singapore, Colombia, and 39 more jurisdictions, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear. 31 of the 208 go a level deeper still, with their own further subsidiaries recorded beneath them — additional ownership layers this view doesn't expand.
Can Zavia monitor changes to MARSH & MCLENNAN COMPANIES, INC.'s ownership over time?
This profile reflects a point-in-time snapshot from New York Department of State — Division of Corporations. Zavia's monitoring API can track changes to MARSH & MCLENNAN COMPANIES, INC.'s registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access MARSH & MCLENNAN COMPANIES, INC.'s data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including United States, so records like MARSH & MCLENNAN COMPANIES, INC.'s registration, shareholder, UBO, and group-structure data can be queried programmatically instead of viewed one page at a time.
Where does this company information come from, and how current is it?
This record is sourced directly from New York Department of State — Division of Corporations and was last synced on 9 September 2026.