Top Audit and Actuarial Firms Shape Financial Integrity in Insurance

The December 2025 issue of Best’s Review features an in-depth special section on the top audit and actuarial firms that serve the insurance industry. These firms play crucial roles in ensuring the financial accuracy, compliance, and risk management for insurance companies amid evolving regulatory and market environments. Auditors provide independent verification of insurers’ financial statements, confirming adherence to statutory accounting principles and regulatory standards. Actuaries contribute statutory opinions on the adequacy of policy and claim reserves, helping insurers maintain financial strength and regulatory compliance. The rankings of these audit and actuarial firms are derived from the total loss reserves managed by their insurance company clients across property/casualty, life, and health insurance sectors in the U.S. and Canada. Loss reserves are essential financial estimates that insurers set aside to cover anticipated claims and associated expenses, encompassing loss adjustment expenses for property/casualty insurers, unpaid claims for health insurers, and policy reserves for life insurers. The article highlights the critical challenges auditors and actuaries face in 2026, particularly the growing influence of artificial intelligence (AI) in their work. AI facilitates advanced predictive modeling, automated reconciliation of financial data, anomaly detection, and continuous auditing processes. However, it also introduces challenges related to explainability, potential biases, and compliance with regulatory requirements, necessitating ongoing skill development for professionals in these fields. In addition to technological impacts, auditors and actuaries must also navigate regulatory changes such as AG 55 and market pressures including healthcare inflation and cybersecurity risks. These factors underscore the increasing complexity of the insurance risk environment and the pivotal role that audit and actuarial functions play in helping insurers sustain financial integrity. Overall, Best’s Review provides valuable insights into the evolving landscape of audit and actuarial services in insurance, emphasizing the importance of these firms in risk assessment, regulatory compliance, and adapting to technological advancements. The detailed rankings and analysis offer insurance professionals a clear perspective on current industry leaders and emerging trends affecting financial oversight.