professional liability lines. It also provides workers’ compensation, property casualty, general liability, professional liability, and excess and umbrella coverage insurance products, as well as coverages for technology, ambulatory surgery centers, chiropractors, and concierge physicians; accident and health insurance and reinsurance products; insurance for commercial risks; pollution liability and coverages to contractors, consultants, and owners; and liquor liability and inland marine coverage for small to medium-sized insureds.

Moreover, this segment offers directors and officers, and surety risk products, as well as products for life sciences and travel industries; coverage for excess liability, construction wrap-ups, and completed operations; cyber risk solutions; casualty, group life, and crime-related insurance products; personal lines insurance solutions, including home, condo/co-op, and collectibles; automobile, law enforcement, public officials and educator's legal, and employment practices liability, as well as incidental medical insurance products; and at-risk and alternative risk insurance program management services. The Reinsurance segment provides other insurance companies and self-insureds with assistance in managing their net risk through reinsurance on a portfolio basis through treaty reinsurance or on an individual basis through facultative reinsurance.

William R. Berkley founded W. R. Berkley in 1967. It has its headquarters in Greenwich in Connecticut.