Marsh & McLennan
E55791
consulting firm
insurance brokerage company
professional services firm
public company
risk management company
Marsh & McLennan is a global professional services firm specializing in insurance brokerage, risk management, and consulting.
All labels observed (8)
How this entity was disambiguated
This entity first appeared as the object of triple T438279 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Marsh & McLennan Context triple: [North Tower of the World Trade Center, tenant, Marsh & McLennan]
-
A.
Aon Corporation
Aon Corporation is a global professional services firm specializing in risk management, insurance brokerage, and human capital consulting.
-
B.
Willis Group Holdings
Willis Group Holdings was a global insurance brokerage and risk management firm best known for acquiring the naming rights to Chicago’s Willis Tower (formerly the Sears Tower).
-
C.
Northwestern Mutual
Northwestern Mutual is a major American financial services and insurance company known for its life insurance, investment, and wealth management products.
-
D.
Prudential Financial
Prudential Financial is a major American financial services company best known for its life insurance, investment management, and retirement-related products.
-
E.
John Hancock Mutual Life Insurance Company
John Hancock Mutual Life Insurance Company was a major American life insurance firm based in Boston, known for its prominent role in the financial services industry and for sponsoring landmark real estate developments.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Marsh & McLennan Target entity description: Marsh & McLennan is a global professional services firm specializing in insurance brokerage, risk management, and consulting.
-
A.
Aon Corporation
Aon Corporation is a global professional services firm specializing in risk management, insurance brokerage, and human capital consulting.
-
B.
Willis Group Holdings
Willis Group Holdings was a global insurance brokerage and risk management firm best known for acquiring the naming rights to Chicago’s Willis Tower (formerly the Sears Tower).
-
C.
Northwestern Mutual
Northwestern Mutual is a major American financial services and insurance company known for its life insurance, investment, and wealth management products.
-
D.
Prudential Financial
Prudential Financial is a major American financial services company best known for its life insurance, investment management, and retirement-related products.
-
E.
John Hancock Mutual Life Insurance Company
John Hancock Mutual Life Insurance Company was a major American life insurance firm based in Boston, known for its prominent role in the financial services industry and for sponsoring landmark real estate developments.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
consulting firm
ⓘ
insurance brokerage company ⓘ professional services firm ⓘ public company ⓘ risk management company ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| formerName |
Marsh & McLennan Companies, Inc.
ⓘ
linked to:
Marsh & McLennan
|
| foundedBy |
Donald R. McLennan
ⓘ
Henry W. Marsh ⓘ |
| hasBrand |
Marsh McLennan
ⓘ
linked to:
Marsh & McLennan
|
| hasDivision |
consulting
ⓘ
risk and insurance services ⓘ |
| hasSubsidiary |
Guy Carpenter
ⓘ
Marsh ⓘ Mercer ⓘ Oliver Wyman ⓘ |
| headquartersLocation |
New York
ⓘ
linked to:
New York City
New York City ⓘ United States ⓘ
linked to:
United States of America
|
| industry |
insurance brokerage
ⓘ
management consulting ⓘ professional services ⓘ risk management ⓘ |
| legalForm | corporation ⓘ |
| notableSubsidiary |
Guy Carpenter, the reinsurance broker
ⓘ
Marsh, the insurance broker ⓘ
linked to:
Marsh & McLennan
Mercer, the HR consulting firm ⓘ Oliver Wyman, the management consulting firm ⓘ |
| operatesInSector |
consulting
ⓘ
financial services ⓘ insurance ⓘ |
| scope | global ⓘ |
| service |
actuarial consulting
ⓘ
human resources consulting ⓘ insurance broking ⓘ reinsurance broking ⓘ risk advisory ⓘ strategy consulting ⓘ |
| shortName | MMC ⓘ |
| stockExchange | New York Stock Exchange ⓘ |
| tradedAs | NYSE:MMC ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Marsh & McLennan Description of subject: Marsh & McLennan is a global professional services firm specializing in insurance brokerage, risk management, and consulting.
Referenced by (28)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Marsh & McLennan
linked to: Marsh & McLennan
linked to: Marsh & McLennan
subject linked to:
WSH
linked to: Marsh & McLennan
subject linked to:
AON
linked to: Marsh & McLennan
linked to: Marsh & McLennan
linked to: Marsh & McLennan
linked to: Marsh & McLennan
linked to: Marsh & McLennan
linked to: Marsh & McLennan
linked to: Marsh & McLennan
linked to: Marsh & McLennan
linked to: Marsh & McLennan
subject linked to:
NYSE:MMC
linked to: Marsh & McLennan
subject linked to:
NYSE:MMC
linked to: Marsh & McLennan
subject linked to:
NYSE:MMC
linked to: Marsh & McLennan
linked to: Marsh & McLennan
subject linked to:
Mercer, the HR consulting firm
linked to: Marsh & McLennan
subject linked to:
Oliver Wyman, the management consulting firm
linked to: Marsh & McLennan
subject linked to:
Oliver Wyman, the management consulting firm
linked to: Marsh & McLennan
subject linked to:
Guy Carpenter, the reinsurance broker
linked to: Marsh & McLennan
subject linked to:
Guy Carpenter, the reinsurance broker
linked to: Marsh & McLennan
linked to: Marsh & McLennan
linked to: Marsh & McLennan