”Marsh & McLennan Companies is a global professional services firm with 51,000 employees in more than 100 countries. Our vision is to be the world's leading global advice and solutions firm, dedicated to managing risk, maximising growth, and creating value for our clients and shareholders.”

Foruden Marsh er Marsh & McLennan Companies også moderselskab for:

• Guy Carpenter
  Guy Carpenter & Company, LLC is the world’s leading risk and reinsurance specialist.
  
• Mercer
  Mercer is a leading global provider of consulting, outsourcing and investment services.
  
• Mercer, Denmark
  Liv- og pensionsforsikring i Danmark
  

• Oliver Wyman
  a leader in financial services strategy and risk management consulting
  

For mere information, følg ovenstående links til de respektive hjemmesider.