
Lexington Insurance Company is a wholly-owned subsidiary of American International Group, Inc. (NYSE: AIG) and the largest excess and surplus lines insurer in the United States. Founded in 1965 and headquartered in Boston, Massachusetts, it writes coverage for risks that standard admitted-market insurers decline, distributed exclusively through wholesale brokers.
Parent Company
Founded
1965
Status
Publicly Traded
Headquarters
| Brand | Parent Company | Ownership Type |
|---|---|---|
| Lexington Insurance | American International Group, Inc. | Subsidiary |
Lexington Insurance Company was founded in 1965, pioneering what became the modern excess and surplus lines market in the United States. The E&S segment exists for risks that admitted-market insurers either cannot or will not cover: unusual exposures, high hazard industries, distressed accounts, new products without loss history, and limits beyond what standard carriers offer. Lexington built its franchise as the category's defining company.
The company became part of the AIG organization and grew into the group's flagship for non-admitted business. Through the 1980s and 1990s, as AIG expanded into the largest US insurer, Lexington anchored the surplus lines side of the book, writing everything from demolition contractors to environmental liability to coastal property that admitted carriers had abandoned.
Lexington's model survived AIG's post-2008 retrenchment intact. While the parent sold life businesses, spun off Corebridge, and exited reinsurance, the E&S franchise stayed inside the General Insurance core because wholesale-brokered specialty risk remained one of AIG's genuinely differentiated capabilities.
The modern era has been a growth period. E&S premiums across the US market expanded sharply after 2019 as admitted carriers tightened appetite on catastrophe-exposed property, litigation-prone liability classes, and emerging risks like cannabis and cyber. Lexington, as the market's largest writer, captured disproportionate share of that migration. At AIG's investor presentations, management has highlighted submission growth in the Lexington business as evidence of the segment's momentum, and the unit features prominently in the company's North America Commercial strategy.
The subsidiary received an S&P financial strength rating upgrade to AA- in May 2025, part of a synchronized upgrade across AIG's core operating companies that signaled the parent's restored underwriting credibility.
What does American International Group own?
AIG owns a group of regulated insurance subsidiaries including National Union Fire Insurance Company, American Home Assurance, Lexington Insurance, Talbot Underwriting at Lloyd's, Western World, and Glatfelter. It also owns the Travel Guard travel insurance brand and held a 10.1 percent stake in former subsidiary Corebridge Financial at the end of 2025.
Is American International Group publicly traded?
Yes. AIG trades on the New York Stock Exchange under ticker AIG and is a component of the S&P 500. The company went public in 1969. Its shares are widely held by institutional investors.
Who founded American International Group?
Cornelius Vander Starr founded the company in Shanghai in 1919 as American Asiatic Underwriters, a general insurance agency serving Western businesses in China. Starr moved the headquarters to New York in 1939 and built the organization into a multinational insurer.
Where is American International Group headquartered?
AIG is headquartered in New York, New York, USA. The company has been based in New York since 1939, when Starr relocated from Shanghai ahead of World War II. It operates in more than 200 countries and jurisdictions.
How many brands does American International Group own?
AIG primarily operates under the single AIG master brand. Distinct brands include Lexington Insurance, the largest US excess and surplus lines insurer, and Travel Guard for travel coverage. Regulated underwriting entities such as National Union, American Home, and Talbot issue policies largely under the AIG name.
Who owns American International Group?
AIG is owned by its public shareholders, with no controlling owner. Major institutional holders include Vanguard, BlackRock, and State Street. The US Treasury owned up to 92 percent during the 2008 bailout but exited completely in December 2012.
Did the government profit from the AIG bailout?
Yes. The Federal Reserve and Treasury committed up to $182 billion in support in 2008 and 2009. AIG repaid all assistance by the end of 2012, and the government recorded a combined profit of approximately $22.7 billion on the rescue.
These competing brands operate in the same categories and provide similar products or services. Compare key attributes to understand market positioning and competitive landscape.
| Brand | Parent Company | Country | Founded | Market Position | Primary Market | Gender Target |
|---|---|---|---|---|---|---|
| Chubb | USA (executive offices) | 1882 | Market leader | Global | All-ages | |
| Liberty Mutual Insurance | USA | 1912 | Mass market | United states | All Genders | |
| The Hartford | USA | 1982 | Premium | United states | All Genders | |
| American International Group | USA | 1919 | Mass market | Global | All Genders | |
| American International Group | USA | 1982 | Mass market | Global | All Genders |
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Market Positioning: Lexington Insurance competes with 5 brands in the same categories, ranging from mass market to luxury positioning.
Geographic Distribution: Competitors are headquartered across multiple regions, indicating global competition in this market segment.
Brand Heritage: Competitor brands range from established heritage brands to newer market entrants, with founding years spanning several decades.
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