The Progressive Corporation, an insurance holding company, provides personal and commercial auto, personal residential and commercial property, business related general liability, and other specialty property-casualty insurance products and related services in the United States. It operates in three segments: Personal Lines, Commercial Lines, and Property. The Personal Lines segment writes insurance for personal autos and recreational vehicles (RV). This segment's products include personal auto insurance; and special lines products, including insurance for motorcycles, ATVs, RVs, watercrafts, snowmobiles, and related products. The Commercial Lines segment provides auto-related liability and physical damage insurance, and business-related general liability and property insurance for autos, vans, and pick-up trucks used by small businesses, as well as non-fleet taxis, black-car services, and airport taxis; tractors, trailers, and straight trucks primarily used by regional general freight and expeditor-type businesses, and long-haul operators; dump trucks used by light contractors and heavy constructions; log trucks and garbage trucks used by dirt, sand and gravel, logging, garbage/debris removal, and coal-type businesses; and tow trucks and wreckers used in towing services and gas/service station businesses. The Property segment writes residential property insurance for homeowners, other property owners, and renters, as well as offers manufactured homes, personal umbrella insurance, and primary and excess flood insurance. The company offers policy issuance and claims adjusting services; acts as an agent to homeowners, general liability, workers' compensation insurance, and other products; and reinsurance services. It sells its products through independent insurance agencies, as well as through mobile applications and over the phone. The Progressive Corporation was founded in 1937 and is headquartered in Mayfield Village, Ohio.

The Travelers Companies, Inc., through its subsidiaries, provides a range of commercial and personal property, and casualty insurance products and services to businesses, government units, associations, and individuals in the United States and internationally. The company operates through three segments: Business Insurance, Bond & Specialty Insurance, and Personal Insurance. The Business Insurance segment offers workers' compensation, commercial automobile and property, general liability, commercial multi-peril, employers' liability, public and product liability, professional indemnity, marine, aviation, onshore and offshore energy, construction, terrorism, personal accident, and kidnap and ransom insurance products. This segment operates through select accounts, which serve small businesses; commercial accounts that serve mid-sized businesses; national accounts, which serve large companies; and national property and other that serve large and mid-sized customers, commercial trucking industry, and agricultural businesses, as well as markets and distributes its products through brokers, wholesale agents, and program managers. The Bond & Specialty Insurance segment provides surety, fidelity, management and professional liability, and other property and casualty coverages and related risk management services through independent agencies and brokers. The Personal Insurance segment offers property and casualty insurance covering personal risks, primarily automobile and homeowners' insurance to individuals through independent agencies and brokers. The Travelers Companies, Inc. was founded in 1853 and is based in New York, New York.

W. R. Berkley Corporation, an insurance holding company, operates as a commercial lines writers worldwide. It operates in two segments, Insurance and Reinsurance & Monoline Excess. The Insurance segment underwrites commercial insurance business, including excess and surplus lines, admitted lines, and specialty personal lines. This segment also provides accident and health insurance and reinsurance products; insurance for commercial risks; casualty and specialty environmental products; specialized insurance coverages for fine arts and jewelry exposures; excess liability and inland marine coverage for small to medium-sized insureds; and commercial general liability, umbrella, professional liability, directors and officers, commercial property, and surety products, as well as products for technology, and life sciences and travel industries. In addition, this segment offers cyber risk solutions; crime and fidelity insurance products; medical professional coverages; workers' compensation insurance products; general insurance; personal lines insurance solutions, including home, condo/co-op, auto, and collectibles; automobile, law enforcement, public officials and educator's legal, and employment practices liability, as well as incidental medical and property and crime insurance products; at-risk and alternative risk insurance program management services; professional liability; energy and marine risks; and provides insurance products to the Lloyd's marketplace. The Reinsurance & Monoline Excess segment provides treaty and facultative reinsurance solutions; property and casualty reinsurance; facultative reinsurance products include automatic, semi-automatic and individual risk assumed reinsurance; and turnkey products such as cyber, employment practices liability insurance, liquor liability insurance and violent events. The company was founded in 1967 and is headquartered in Greenwich, Connecticut.

CNA Financial Corporation provides commercial property and casualty insurance products in the United States and internationally. It operates through Specialty, Commercial, International, Life & Group, and Corporate & Other segments. The company offers professional liability coverages and risk management services to various professional firms, including architects, real estate agents, and accounting and law firms; directors and officers, employment practices, fiduciary, and fidelity and cyber coverages to small and mid-size firms, public and privately held firms, and not-for-profit organizations; professional and general liability, as well as associated casualty coverages for healthcare industry; surety and fidelity bonds; and warranty and alternative risks products. It also provides property, marine, boiler, and machinery coverage insurance products; casualty insurance products comprising workers' compensation, general and product liability, commercial auto, umbrella, and excess and surplus coverages; specialized loss-sensitive insurance programs and total risk management services; and run-off long term care policies. The company was founded in 1853 and is based in Chicago, Illinois. CNA Financial Corporation is a subsidiary of Loews Corporation.

RenaissanceRe Holdings Ltd., together with its subsidiaries, provides reinsurance and insurance products in the United States and internationally. The company operates through Property, and Casualty and Specialty segments. The Property segment writes property catastrophe excess of loss reinsurance and excess of loss reinsurance to insure insurance and reinsurance companies against natural and man-made catastrophes, including hurricanes, earthquakes, typhoons, and tsunamis, as well as winter storms, freezes, floods, fires, windstorms, tornadoes, explosions, and acts of terrorism; and other property class of products, such as proportional reinsurance, property per risk, property reinsurance, binding facilities, and regional U.S. multi-line reinsurance. The Casualty and Specialty segment writes various classes of products, such as directors and officers, medical malpractice, and professional indemnity; automobile and employer's liability, casualty clash, umbrella or excess casualty, workers' compensation, and general liability; financial and mortgage guaranty, political risk, surety, and trade credit; and accident and health, agriculture, aviation, cyber, energy, marine, satellite, and terrorism. It distributes products and services primarily through intermediaries. The company invests in and manages funds. RenaissanceRe Holdings Ltd. was founded in 1993 and is headquartered in Pembroke, Bermuda.

Old Republic International Corporation, through its subsidiaries, engages in the insurance underwriting and related services business primarily in the United States and Canada. It operates through three segments: General Insurance, Title Insurance, and Republic Financial Indemnity Group Run-off Business. The General Insurance segment offers aviation, commercial auto, commercial multi-peril, commercial property, general liability, home and auto warranty, inland marine, travel accident, and workers' compensation insurance products; and financial indemnity products for specialty coverages, including errors and omissions, fidelity, directors and officers, and surety. This segment provides its insurance products to businesses, state and local government, and other institutions in transportation, commercial construction, healthcare, education, retail and wholesale trade, forest products, energy, general manufacturing, and financial services industries. The Title Insurance segment offers lenders' and owners' policies to real estate purchasers and investors based upon searches of the public records. This segment also provides escrow closing and construction disbursement services; and real estate information products, national default management services, and various other services pertaining to real estate transfers and loan transactions. The Republic Financial Indemnity Group Run-off Business segment offers private mortgage insurance coverage that protects mortgage lenders and investors from default related losses on residential mortgage loans made primarily to homebuyers. Old Republic International Corporation was founded in 1923 and is based in Chicago, Illinois.

ProAssurance Corporation, through its subsidiaries, provides property and casualty insurance, and reinsurance products in the United States. The company operates through Specialty Property and Casualty, Workers' Compensation Insurance, and Segregated Portfolio Cell Reinsurance segments. It offers professional liability insurance to healthcare providers and institutions, and attorneys and their firms; medical technology liability insurance to medical technology and life sciences companies; and custom alternative risk solutions, including assumed reinsurance, loss portfolio transfers, and captive cell programs for healthcare professional liability insureds. The company also provides workers' compensation insurance products, such as guaranteed cost policies, policyholder dividend policies, retrospectively rated policies, and deductible policies, as well as alternative market solutions that include program design, fronting, claims administration, risk management, SPC rental, asset management, and SPC management services for individual companies, agencies, groups, and associations. The company also participates in Syndicate 1729 at Lloyd's of London for underwriting. It markets its products through independent agencies and brokers, as well as an internal business development team. The company was founded in 1976 and is headquartered in Birmingham, Alabama.

Conifer Holdings, Inc., an insurance holding company, engages in the sale of property and casualty insurance products. The company offers insurance coverage in specialty commercial and personal product lines. It also underwrites various specialty insurance products, including property, general liability, liquor liability, automobile, and homeowners and dwelling policies. The company serves the commercial insurance needs of owner-operated businesses in the markets, such as hospitality, which includes restaurants, bars, taverns, and bowling centers, as well as small grocery and convenience stores; artisan contractors comprising plumbers, painters, carpenters, electricians, and other independent contractors; and security service providers, including companies that provide security guard services, security alarm products and services, and private investigative services. It offers specialty homeowners insurance products, such as low- value dwelling insurance tailored for owners of lower valued homes in Illinois, Indiana, Louisiana, and Texas; and wholesale agency services comprising commercial and personal lines insurance products for its insurance company subsidiaries, as well as third party insurers. Conifer Holdings, Inc. markets and sells its insurance products through a network of independent agents in 50 states in the United States. The company was incorporated in 2009 and is headquartered in Troy, Michigan.