Donegal Group Inc., an insurance holding company, provides personal and commercial lines of property and casualty insurance to businesses and individuals.

The Hanover Insurance Group, Inc., through its subsidiaries, provides various property and casualty insurance products and services in the United States.

RLI Corp., an insurance holding company, underwrites property and casualty insurance in the United States and internationally. Its Casualty segment provides commercial and personal coverage products; and general liability products, such as coverage for third-party liability of commercial insureds, including manufacturers, contractors, apartments, and mercantile.

Chubb Limited provides insurance and reinsurance products worldwide. The company's North America Commercial P&C Insurance segment offers commercial property, casualty, workers' compensation, package policies, risk management, financial lines, marine, construction, environmental, medical, cyber risk, surety, and excess casualty; and group accident and health insurance to large, middle market, and small commercial businesses.

The Progressive Corporation, an insurance holding company, provides personal and commercial auto, personal residential and commercial property, general liability, and other specialty property-casualty insurance products and related services in the United States.

W.R. Berkley Corp. is an insurance holding company, which engages in the property casualty insurance business. It operates through the following segments: Insurance and Reinsurance & Monoline Excess.

Selective Insurance Group, Inc., together with its subsidiaries, provides insurance products and services in the United States. It operates through four segments: Standard Commercial Lines, Standard Personal Lines, E&S Lines, and Investments.

Horace Mann Educators Corporation, together with its subsidiaries, operates as an insurance holding company in the United States. It operates in three segments: Property & Casualty, Life & Retirement, and Supplemental & Group Benefits.

Global Indemnity Group, LLC, through its subsidiaries, provides specialty property and casualty insurance and reinsurance products worldwide. It operates through Commercial Specialty; Farm, Ranch, & Stable; and Reinsurance Operations segments.

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, Segregated Portfolio Cell Reinsurance, and Lloyd's Syndicate segments.

Kemper Corporation, a diversified insurance holding company, provides property and casualty, and life and health insurance in the United States. The company operates through three segments: Specialty Property & Casualty Insurance, Preferred Property & Casualty Insurance, and Life & Health Insurance.

CNA Financial Corporation provides commercial property and casualty insurance products primarily in the United States. It operates through Specialty, Commercial, International, Life & Group, and Corporate & Other segments.

W. R. Berkley Corporation, an insurance holding company, operates as a commercial lines writer in the United States and internationally. It operates in two segments, Insurance and Reinsurance & Monoline Excess.

Kinsale Capital Group, Inc., a specialty insurance company, provides property and casualty insurance products in the United States. The company's commercial lines offerings include construction, small business, excess and general casualty, commercial property, allied health, life sciences, energy, environmental, health care, inland marine, public entity, and commercial insurance, as well as product, professional, and management liability insurance.