American International Group Inc (AIG)

How it makes money

AIG generates revenue primarily through insurance premiums written on property and casualty policies across commercial and personal lines. The company also derives significant revenue from net investment income earned on invested premiums, policy reserves, and the company's capital base. Underwriting income depends on the relationship between premiums collected and claims paid, while investment income is generated from AIG's substantial invested assets portfolio.

Revenue by segment

AIG possesses scale advantages through its global reach, sophisticated underwriting infrastructure, and ability to aggregate and manage large, complex risks across multiple geographies. Its extensive broker relationships, global distribution network, and brand recognition provide competitive advantages in winning large multinational accounts. However, the moat is narrow because the insurance industry remains highly competitive with significant competition from other large carriers (Chubb, Travelers, Zurich), well-capitalized alternative providers, and emerging insurtech competitors. Premium pricing is competitive, and underwriting margins are subject to cyclical pressure.

Insurance premium demand is moderately cyclical, correlating with economic growth, business activity and asset values. During economic expansions, businesses purchase more insurance as economic activity increases and capital values rise. During recessions, premium demand typically contracts as businesses reduce spending and economic activity declines. However, insurance retains some defensive characteristics as property and liability coverage remains essential for most businesses regardless of economic conditions. Commercial insurance demand is particularly sensitive to business investment and expansion cycles.

Key risks

• Catastrophic Losses and Climate Change — AIG faces increasing exposure to catastrophic losses from natural disasters including hurricanes, tornadoes, wildfires, floods and pandemics. Climate change may be increasing the frequency and severity of these events, which could exceed AIG's modeling assumptions and force the company to incur higher reinsurance costs, accept greater uninsured exposures, or exit certain underwriting lines. Industry losses averaged $140 billion over the last eight years, with 2024 reaching $145 billion.
• Long-Tail Casualty Exposure — AIG retains significant exposure to long-tail casualty lines (like workers compensation, general liability, and professional liability) where claims can emerge years after policies are written. Adverse development of reserves or unexpected claim inflation could reduce profitability.
• Intense Competition and Pricing Pressure — The commercial insurance market is highly competitive with numerous large insurers and alternative capital providers competing for market share. This competition may constrain AIG's ability to maintain pricing discipline and underwriting margins, particularly during soft insurance market conditions.
• Regulatory and Compliance Risk — AIG operates under extensive regulation by insurance, securities, and derivatives regulators across the United States and multiple foreign jurisdictions. Changes in regulatory requirements, capital requirements, or changes in how reserves must be calculated could materially impact AIG's financial condition and operations.