The Insurance Holding Company System Regulatory Act (adopted by many states based on the NAIC model) governs registration, reporting, and oversight of insurers within holding-company systems. It requires disclosure of material transactions among affiliates, enterprise risk reporting, and prior approval of certain acquisitions or divestitures. The act helps regulators assess group-wide risks that could affect policyholders, complementing entity-level solvency requirements and market-conduct oversight.

Legal and compliance teams file holding-company registration statements, enterprise-risk reports, and Form As for acquisitions, coordinating with regulators to keep market-conduct and solvency oversight aligned.