The principal units of the Commercial Insurance Group provide the widest available range of commercial and coverages.

• AIG Executive Liability is the leading provider of directors and officers, employment practices liability, network security insurance, fidelity/crime coverage and a premier underwriter of professional liability and fiduciary coverages.
  
• AIG Excess Casualty is the leading provider of excess casualty liability insurance and a leading workers compensation insurer.
  
• Lexington Insurance Company is the largest excess and surplus lines carrier, specializing in difficult-to-place property and casualty risks.
  
• AIG Environmental is the leading provider of environmental coverages and services.
  
• AIG Risk Management, Inc. provides casualty risk management products and services to large commercial customers.
  
• AIG Worldsource is a leading provider of global insurance programs for U.S.-based multinationals, as well as foreign companies with operations in the United States.
  
• Specialty Business Units draws on the worldwide resources of AIG companies to meet client needs in aviation, transportation, the construction and energy industries, the small business sector and accident and health coverages, as well as engineering services through AIG Consultants, Inc.
  

Domestic Personal Lines
AIG’s growing Domestic Personal Lines operations provide automobile insurance through AIG Direct, the mass marketing operation, Agency Auto Division and 21st Century Insurance Group, as well as a broad range of coverages for high-net-worth individuals through the AIG Private Client Group.

• United Guaranty Corporation subsidiaries provide default protection insurance for first and second mortgages and private education loans, as well as other financial services, to financial institutions and mortgage investors.
  
• HSB Group, Inc. is the parent company of The Hartford Steam Boiler Inspection and Insurance Company, HSB Engineering Insurance Limited and The Boiler Inspection and Insurance Company of Canada, leading worldwide providers of equipment breakdown and engineered lines insurance.

Transatlantic Holdings, Inc. (TRH) is a majority-owned subsidiary of AIG. TRH’s subsidiaries offer reinsurance capacity on both a treaty and facultative basis worldwide – structuring programs for a full range of property and casualty products, with an emphasis on specialty risks.

Foreign General Insurance Group comprises AIG’s international property-casualty operations.

• American International Underwriters (AIU) is the marketing unit for AIG’s overseas property-casualty operations, the most extensive foreign network of any insurance organization. Stretching across Asia and the Pacific to Latin America, Europe, Africa and the Middle East, AIU markets a full range of property-casualty products to both commercial and consumer clients.
  
• AIU Accident & Health Division is a leading provider of accident, supplemental health and travel insurance to international businesses and consumers.
  
• AIU Commercial Lines Division is a market leader in financial lines in Europe, surpassing one billion dollars in premiums.
  
• AIU Personal Lines Division operates globally to provide automobile, personal property and extended warranty coverages. It also provides products and services for the high-net-worth segment, institutional and individual clients.

AIG Global Marine and Energy serves the global insurance, risk management and loss control needs of marine and energy clients, including renewable operations such as biofuel, hydroelectric, geothermal, solar and wind.