Ledgebrook, a Boston-based InsurTech developing AI-native technology for specialty insurance, has raised $200m in primary equity funding to expand its underwriting of complex and hard-to-place US commercial risks.

Allianz X, the corporate venture unit of Allianz Group, co-led the round with Rockefeller Capital Management, alongside new and existing investors. Separately, Allianz Re will become a multi-year reinsurance partner for Ledgebrook.

The company will use the funding to expand its technology, including further development of Blackbird, its in-house underwriting engine. Ledgebrook expects cumulative premium written to exceed $1bn, after beginning to write policies in 2023.

Ledgebrook connects wholesale brokers seeking cover for complex risks with the capital providers supporting those policies. It underwrites general liability, professional liability and specialty lines for mid-market businesses, distributing its products exclusively through wholesale brokers.

Blackbird processes submissions, categorises risks and generates a technical price, allowing Ledgebrook to produce quotes for specialty business within hours rather than weeks. Human underwriters retain responsibility for final underwriting decisions. The investment also expands Allianz X’s US property and casualty (P&C) portfolio. Ledgebrook’s focus on general liability for mid-sized businesses in the excess and surplus (E&S) market adds exposure to a segment not previously covered by the investor’s platform.

Ledgebrook was founded in Boston in 2022 by CEO Gage Caligaris, a mathematician and actuary trained at Harvard. Its carrier, Ledgebrook Specialty Insurance Company, received an A- (Excellent) Financial Strength Rating and a Financial Size Category of VIII from AM Best in August 2026. The company has around 300 employees, including approximately 80 underwriters and 50 engineers.

Source link