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Insurance brokers

Marsh McLennan Agency

Marsh McLennan Agency places business insurance, employee health and benefits, private client insurance, and retirement and wealth services for organizations and individuals in the United States.

On the commercial side it works with a wide range of carriers and builds a program after researching the client's organization, industry, market, and people. Coverage is paired with risk prevention work, including past claims analysis, employee safety programs, and loss control techniques, along with claims advocacy, captives and alternative risk structures, and total cost of risk analysis.

Other practices cover property, cyber risk, executive and management liability, workers' health data, ERISA consulting, HR technology consulting, employee communications, and employer retirement plans including 401(k) and 403(b) programs. Named industry teams include financial institutions, forestry and wood products, human service and non-profit, and transportation and trucking.

Private Client Services handles personal home, auto, liability, and cyber coverage, plus aviation, fine art, trust, and yacht policies, family office advice, and group personal excess liability. Which office and which industry team would handle a given account is worth confirming directly with the agency.

Best for

Organizations that want one broker for commercial coverage, employee benefits, and retirement plans with industry-specific teams and in-house risk control; individual owners are served through a separate private client practice.

What they do

  • Business insurance and commercial property coverage
  • Cyber risk insurance
  • Employee health and benefits consulting
  • Employer retirement plans
  • Private client home, auto, and liability insurance
  • Risk management and loss control services
  • Claims advocacy and management
  • Captives and alternative risk solutions
  • ERISA consulting services
  • HR technology consulting

What stands out

  • Runs named industry practices including financial institutions, forestry and wood products, human service and non-profit, and transportation and trucking.
  • Publishes an annual Employee Health & Benefits Trends report, most recently for 2026.