Insurance Holding Company Act; include NAIC Group Capital Calculation test requirements.

Added new definitions for 'enterprise risk', 'group-wide supervisor', 'internationally active insurance group', 'group capital calculation instructions', and 'NAIC Liquidity Stress Test Framework'.

Requires ultimate controlling persons of registered insurers to file annual enterprise risk reports and group capital calculations with the insurance commissioner.

Requires insurers meeting specific criteria to file annual liquidity stress test results with the commissioner.

Updated registration requirements to include summaries of changes from prior filings and expedited reporting of dividends and distributions.

Added requirements for written agreements between the commissioner and the NAIC governing information sharing and confidentiality.

Expanded transaction reporting requirements to include additional types of transactions that must be reported to the commissioner.

Strengthened confidentiality protections for group capital calculations and liquidity stress test data, prohibiting public disclosure without specific exceptions.