”Marsh & McLennan Companies (MMC) is a global professional services firm with 55,000 employees in over 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 MMC også moderselskab for:

• Guy Carpenter
  the world’s leading reinsurance specialist
  
• Kroll
  the world’s leading risk consulting company
  
• Mercer Human Resource Consulting
  a global leader for HR and related financial advice, products and services
  
• Mercer Human Resource Consulting, Denmark
  Liv- og pensionsforsikring i Danmark
  

• Mercer Management Consulting
  one of the world's premier corporate strategy and operations firms
  
• Mercer Oliver Wyman
  a leader in financial services strategy and risk management consulting
  
• Mercer Delta Organizational Consulting
  a leader on issues of leadership, organisation, and change
  
• Lippincott Mercer
  advisor to clients on corporate identity and brands
  
• NERA Economic Consulting
  an advisor on the economics of competition, regulation, and finance
  
• Putnam Investments
  a global money management firm
  

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