William O'Neill

Bill focuses his practice on guiding clients, including insurers, reinsurers, and health care companies, through complex arbitrations and litigations. He has been recognized as a top insurance and reinsurance attorney in several respected guides.

Bill is the practice group leader for the Insurance + Reinsurance Litigation Group. He has been involved in hundreds of disputes involving life, health, and property/casualty insurance and reinsurance issues. Bill has represented clients in disputes involving yearly renewable term reinsurance premiums, environmental and asbestos reinsurance allocations, “maximum any one life” warranties, extracontractual obligations, sexual abuse claims, fronting arrangements, sunset and commutation clauses, actuarial and agency issues, vanishing premium life insurance policies, cedent insolvencies, long-term care premiums, “follow the fortunes” and “follow the settlements” clauses, late notice, retention warranties, underwriting and claims-handling practices, 9/11 issues, fraud, offset, misrepresentations, recovery of declaratory judgment expenses, and allegations of misconduct by brokers, managing general underwriters and third-party administrators. These disputes center on many types of underlying exposures and business, including variable annuities, individual life, health care, workers’ compensation, long-term care, disability income, accident and health, asbestos, environmental, and construction defects.

In addition to his dispute work, Bill counsels clients regarding business, strategy, and regulatory matters.

Member, Education Committee, AIDA Reinsurance and Insurance Arbitration Society (ARIAS-US)

Former chair, Excess, Surplus Lines and Reinsurance Committee, Torts and Insurance Practice Section, American Bar Association

Member, American Health Lawyers Association