American International Group

American International Group, Inc. is a U.S.-based global insurance organization headquartered in New York. Known as AIG, it provides commercial and personal property-casualty insurance, specialty coverages, and related risk-management services through operating subsidiaries, licenses, authorizations, and network partners in more than 200 countries and jurisdictions.^[1]

Overview

AIG is one of the best-known insurance groups in the United States capital markets. Its common stock is listed on the New York Stock Exchange under the ticker symbol AIG.^[1] The parent company is incorporated in Delaware and reports to the U.S. Securities and Exchange Commission as a public issuer. Its 2025 Form 10-K lists its principal executive offices at 1271 Avenue of the Americas, New York, New York.^[1]

The company’s public identity has changed materially since the 2008 financial crisis. Before the crisis, AIG combined large insurance operations with a financial-products business that wrote derivatives, including credit default swap contracts. After a government rescue, asset sales, recapitalization, and restructurings, AIG’s remaining public-company profile is centered on general insurance: commercial lines, specialty insurance, personal insurance, underwriting, claims, and investment income associated with insurance operations.^[1][4]

AIG is not a bank, and its insurance subsidiaries are generally regulated under state and foreign insurance laws rather than under the U.S. bank-regulatory framework. However, its role in the 2008 crisis made it a major case study in systemic risk, nonbank financial institutions, emergency central-bank lending, and the interaction between insurance balance sheets and capital markets.^[3][4]

Business model

AIG earns revenue primarily from insurance premiums and investment income. In a property-casualty insurance model, customers pay premiums in exchange for coverage against specified risks. The insurer records underwriting revenue and expenses over time, pays covered claims, maintains reserves for unpaid losses, and invests funds held to meet future policy obligations. Profitability depends on underwriting discipline, claims experience, catastrophe losses, pricing adequacy, expense control, reinsurance arrangements, and investment returns.^[1]

AIG’s 2025 Form 10-K describes the company as providing insurance solutions to businesses and individuals in more than 200 countries and jurisdictions. The same filing emphasizes underwriting, claims expertise, distribution relationships, and a customer base ranging from individuals and small and medium-sized businesses to multinational companies.^[1]

Its distribution relationships include brokers, agents, advisors, marketplaces, and other distributors. In commercial insurance, brokers are particularly important because many corporate and institutional buyers place complex risks through intermediaries. In personal lines and travel-related products, distribution may involve agents, affinity arrangements, travel channels, digital platforms, or other partners.^[1]

Operating structure

AIG’s current operating structure is principally organized around its General Insurance business. In its 2024 annual reporting, AIG described General Insurance as consisting of three segments: North America Commercial, International Commercial, and Global Personal.^[2] The 2025 Form 10-K continued to present AIG as a global insurance organization, following the separation and deconsolidation of the former Life and Retirement business.^[1]

North America Commercial consists of insurance businesses in the United States, Canada, and Bermuda. Products in commercial insurance can include casualty, financial lines, property, specialty risks, and multinational programs, depending on the jurisdiction, subsidiary, and underwriting appetite.^[2]

International Commercial covers businesses outside North America, including operations in Japan, the United Kingdom, Europe, the Middle East and Africa, Asia Pacific, Latin America and the Caribbean, and China. AIG’s international commercial platform also includes specialty operations such as marine, aviation, political risk, trade credit, energy-related property, and related specialty products.^[2]

Global Personal consists mainly of personal insurance operations across multiple regions. AIG’s personal insurance activities have historically included products such as accident and health, travel, warranty, and other consumer-oriented coverages, although the precise product mix changes with divestitures, regulatory permissions, and business strategy.^[2]

Separation of Life and Retirement

For much of its history, AIG included both property-casualty insurance and substantial life insurance, retirement, annuity, and asset-management operations. A key restructuring step was the separation of the Life and Retirement business into Corebridge Financial, Inc. AIG’s 2023 Form 10-K stated that Corebridge was the holding company for AIG’s Life and Retirement business and that separating Life and Retirement was intended to allow AIG and Corebridge to pursue distinct strategies appropriate to their markets.^[5]

This separation reduced the complexity of AIG’s consolidated operations and made the remaining AIG public-company profile more focused on property-casualty insurance. It also changed AIG’s reported financial statements, because Corebridge was no longer treated in the same way in AIG’s continuing operations after the separation process advanced.^[1][5]

The transaction illustrates a broader trend among large financial institutions after the 2008 crisis: simplifying corporate structures, reducing capital-intensive or noncore activities, and aligning operating segments more closely with investor and regulatory expectations. In AIG’s case, the separation of Corebridge was one of the most important post-crisis strategic changes after the earlier government-supported stabilization and asset-sale program.^[1][5]

Regulation

AIG operates through a large group of insurance subsidiaries and affiliates. Insurance regulation in the United States is primarily state-based. State insurance regulators supervise solvency, licensing, policy forms, rates in certain lines, claims practices, reserves, dividends from insurance subsidiaries, and risk-based capital requirements. Outside the United States, AIG’s subsidiaries and branches are subject to local insurance, prudential, consumer-protection, sanctions, data, and corporate laws.^[1]

As a public company, AIG is also subject to U.S. federal securities-law disclosure requirements. It files annual reports, quarterly reports, current reports, proxy materials, and other filings with the SEC. Its securities trade on the NYSE, so it is also subject to exchange listing standards.^[1]

AIG’s regulatory history is notable because, in 2008, the Federal Reserve Bank of New York stated that it did not have statutory authority to supervise or regulate AIG or its subsidiaries at the time it provided assistance. Instead, AIG’s regulated subsidiaries were supervised by numerous U.S. state insurance regulators and foreign financial and insurance supervisors, while the listed parent company was subject to SEC rules.^[4] This fragmentation was one reason AIG became a central example in debates over consolidated supervision and resolution authority for large nonbank financial firms.

2008 financial crisis

AIG was one of the most prominent nonbank institutions rescued during the 2008 financial crisis. According to the New York Fed, the company encountered severe liquidity problems primarily because of losses on a mortgage-related investment portfolio and collateral calls on credit default swaps and other financial contracts. On September 15, 2008, downgrades by certain credit rating agencies triggered collateral calls that AIG could not meet.^[4]

The crisis at AIG was not confined to ordinary insurance claims. The most acute liquidity pressure involved AIG Financial Products and capital-markets exposures tied to mortgage-related securities and derivatives. The New York Fed described AIG as the world’s largest insurance company at the time and a major participant in derivatives and other financial instruments. It also noted that a disorderly failure could have affected policyholders, retirement-plan participants, municipal entities, banks, pension plans, and other financial institutions.^[4]

On September 16, 2008, the Federal Reserve authorized the New York Fed to lend up to $85 billion to AIG.^[4] The facility was made under emergency authority during unusual and exigent circumstances. The original support was later restructured several times, including through Treasury investment under the Troubled Asset Relief Program and the creation of special-purpose vehicles associated with mortgage-related assets and credit derivative exposures.^[3][4]

Maiden Lane II and Maiden Lane III

Two of the most important structures in the AIG rescue were Maiden Lane II LLC and Maiden Lane III LLC. The New York Fed and Treasury announced a restructuring of AIG support in November 2008, and the Federal Reserve approved new secured lending facilities intended to relieve capital and liquidity pressures associated with mortgage-related portfolios.^[3][4]

Maiden Lane II was formed to purchase residential mortgage-backed securities from AIG subsidiaries. Maiden Lane III was formed to facilitate the termination of credit default swap contracts on multi-sector collateralized debt obligations that AIG had written through AIG Financial Products.^[3][6] These vehicles were significant because they moved difficult-to-fund or crisis-impaired assets into structures financed by the New York Fed and designed to repay the public-sector loans from portfolio cash flows and asset sales.

The New York Fed reported that its revolving credit facility to AIG was fully repaid on January 14, 2011, including interest and fees. It also reported that Maiden Lane II sold its remaining securities on February 28, 2012, and Maiden Lane III sold its remaining securities on August 23, 2012. The New York Fed said the management of the two portfolios resulted in full repayment of its loans and a combined net gain of approximately $9.4 billion for the U.S. public, including interest paid on the loans.^[4]

Treasury investment and exit

The U.S. Department of the Treasury supported AIG through TARP. Treasury described the intervention as intended to prevent AIG’s disorderly failure after concluding that such a failure would have caused catastrophic damage to the financial system and the economy.^[3]

Treasury’s AIG program involved preferred stock, common stock, repayments, sales proceeds, dividends, and other transactions. Treasury reported that the total amount disbursed to AIG under TARP was $67.8 billion, while the Office of Financial Stability collected $55.3 billion in repayments, sales proceeds, fees, and dividends. Treasury also stated that, after interest expense, the net cost of AIG under TARP was $15.2 billion, and that this cost was offset by proceeds from additional non-TARP AIG shares held by Treasury, resulting in a net gain for Treasury as a whole.^[3]

On December 14, 2012, Treasury announced that it had received payment from its final sale of AIG common stock. Treasury said the Treasury and the Federal Reserve had fully recovered the combined $182.3 billion committed to stabilize AIG, with an additional $22.7 billion positive return. Treasury also stated that it then owned zero shares of AIG common stock, down from 1.655 billion shares, or 92% of outstanding common stock, in January 2011.^[7]

The AIG rescue remains a major reference point in U.S. financial history. It is often discussed alongside the failures or rescues of other large institutions, the conservatorships of government-sponsored enterprises, emergency actions by the Federal Reserve System, and the Treasury’s use of TARP. Unlike ordinary insurance insolvencies handled by state guaranty systems and regulators, the AIG case involved a parent-company liquidity crisis with major capital-markets linkages.^[3][4]

Financial reporting and balance-sheet considerations

AIG’s financial statements reflect insurance accounting concepts that differ from those of banks or industrial companies. Key line items include premiums, losses and loss-adjustment expenses, policyholder benefits where applicable, reinsurance recoverables, deferred acquisition costs, investments, insurance reserves, and shareholders’ equity. Because insurers invest premiums before claims are paid, investment income is an important component of performance.^[1]

Property-casualty insurers are also exposed to catastrophe risk, litigation trends, inflation in repair and medical costs, reserve development, and reinsurance pricing. Commercial insurers may face large losses from natural catastrophes, aviation events, energy incidents, product liability, directors-and-officers claims, cyber events, and other complex risks. The size and timing of such claims can make quarterly and annual results volatile.^[1]

AIG’s Form 10-K filings also contain extensive risk-factor disclosure. These risks include underwriting risk, reserve adequacy, market risk in investment portfolios, credit risk, regulatory risk, operational risk, cybersecurity risk, legal and litigation exposures, and risks associated with global operations. As with other insurers, AIG’s statutory capital and dividends from regulated insurance subsidiaries are important because the parent company depends on subsidiary dividends, asset sales, debt issuance, and other sources for holding-company liquidity.^[1]

Capital markets significance

AIG is important in U.S. finance for several reasons. First, it is a large public insurer with global underwriting operations and a long history in commercial insurance markets. Second, its 2008 rescue became a defining example of how a nonbank financial company could transmit stress through derivatives, securities lending, collateral calls, and confidence effects. Third, its restructuring showed how public-sector support can be unwound through asset sales, recapitalizations, and market transactions.^[3][4][7]

AIG also illustrates the difference between insurance-company solvency and holding-company liquidity. Regulated insurance subsidiaries may hold assets and reserves for policyholder obligations, while a parent company may face liquidity demands, debt maturities, collateral calls, or capital-market funding pressures. In 2008, the liquidity pressure at the parent and financial-products level created risks that ordinary insurance-supervision mechanisms were not designed to resolve quickly across multiple jurisdictions.^[4]

For investors and analysts, AIG is usually evaluated through insurance metrics such as net premiums written, combined ratio, catastrophe losses, prior-year reserve development, underwriting income, investment income, book value, capital return, reinsurance usage, and expense ratio. Those metrics are interpreted alongside broader interest-rate conditions, credit spreads, equity-market movements, and catastrophe-loss trends. Such analysis is descriptive rather than a recommendation to buy or sell the company’s securities.

Relationship to other finance topics

AIG’s history connects to several existing Financepedia topics. Its stock listing links it to the New York Stock Exchange. Its disclosure obligations link it to the U.S. Securities and Exchange Commission. Its 2008 rescue involved the Federal Reserve System and the U.S. Department of the Treasury. Its crisis-period capital-markets exposures overlapped with broader markets for structured credit, derivatives, and mortgage-related securities.

The company is also relevant to discussions of systemic risk, insurer regulation, emergency lending, and the design of resolution frameworks for large nonbank financial institutions. While AIG is primarily an insurance institution today, its crisis history remains a central case in the study of financial stability and public-sector intervention in private financial markets.