Ledgebrook raises over £150 million to scale AI-powered specialty insurance platform
Ledgebrook, a specialist insurance platform, has secured over £150m in primary equity financing to scale its AI-native business, co-led by Allianz X.
The company will use the funding to expand its technology capabilities and further develop Blackbird, Ledgebrook's proprietary AI-native underwriting platform. Separately, Allianz Re has agreed to enter into a multi-year reinsurance agreement with Ledgebrook.
Headquartered in Boston, Ledgebrook connects brokers seeking coverage for hard-to-place risks with the capital providers that support them.
The company focuses on general liability, professional liability, and specialty insurance coverage for mid-sized businesses in the excess and surplus (E&S) market, distributing products exclusively through wholesale brokers.
Its AI-powered platform, Blackbird, automates key underwriting processes by reading submissions, classifying risk, and calculating technical pricing. This allows specialty risks to be quoted in hours rather than weeks, while experienced underwriters retain final decision-making authority.
The approach has helped Ledgebrook grow rapidly and put it on track to exceed $1 billion in cumulative premiums written since launching in 2023.
Gage Caligaris, Founder & CEO of Ledgebrook, said: "Our vision is for Ledgebrook to be the company that makes the wheels of insurance spin faster. Businesses with complex risk deserve specialized underwriting, rated with rigor and delivered at speed.
“Our platform lets our underwriters do that with real discipline. Allianz X backing gives us the capital to keep investing in technology and talent. We're building this company for the long term."
Dr. Nazim Cetin, CEO of Allianz X, said: "The industry is applying AI to its simplest risks first, because that is where automation comes easily. We think the larger prize sits at the other end, in complex, hard to place business, where underwriting judgment is scarce and slow decisions cost the most.
That's exactly the gap Blackbird is built to close, and it's why Ledgebrook fills a meaningful space in our U.S. P&C platform."
John Mullen, President of E&S at Ledgebrook, added: "E&S is seeing strong multi-year growth. Admitted carriers tightened their appetite and pushed risks that were once routinely placed in the admitted market into this channel, and we're excited about accelerating the delivery of value to our distribution partners and insured customers in this segment."
The investment strengthens and diversifies Allianz X's U.S. P&C platform, which spans multiple lines of business and market segments. By focusing on mid-sized general liability risks in the E&S market, Ledgebrook adds a complementary capability to Allianz X's existing insurance portfolio while expanding the firm's presence in a growing segment of the market.