Guidewire said on October 27 it has signed a definitive agreement to buy London-based hyperexponential for $1.7 billion in cash, plus up to $400 million more if the AI underwriting firm hits specified recurring revenue targets, in a deal worth up to $2.1 billion. According to Reuters, the insurance software maker will fund the purchase with $1 billion in new term loans from Bank of America and Citibank plus cash on hand. The deal is expected to close in the second quarter of Guidewire’s fiscal 2027 and will not affect its first-quarter guidance. Hyperexponential, known as hx, has powered underwriting decisions covering more than $75 billion in annual commercial property and casualty premium.
The Deal
Guidewire announced a definitive agreement to acquire Hyperexponential Ltd, a London-based provider of AI-native underwriting and pricing software for commercial property and casualty insurers. The base price is $1.7 billion in cash, subject to adjustments, with up to $400 million in contingent consideration tied to specified recurring revenue targets.
Guidewire expects the deal to add at least 650 basis points to its fiscal 2027 annual recurring revenue growth on an inorganic basis, and at least 150 basis points to durable organic recurring revenue growth from fiscal 2028. It has secured a binding debt commitment for the $1 billion term loan from Bank of America and Citibank. Guidewire will update its second-quarter and full-year fiscal 2027 guidance on its next earnings call in December 2026. Centerview Partners advised Guidewire, with Latham & Watkins as legal counsel, while J.P. Morgan advised hyperexponential, with Wilson Sonsini Goodrich & Rosati (UK) as its legal counsel.
What Hyperexponential Brings
Hyperexponential describes itself as the agentic platform for commercial property and casualty underwriting. Its platform covers submission triage, risk assessment, pricing, rating and portfolio steering, helping carriers write more business at a better loss ratio. Its customers include Aviva, Allianz, Sompo, Beazley, Markel, HDI, Cincinnati Financial, Convex and Bowhead.
The firm already has a commercial relationship with its buyer as a Guidewire PartnerConnect Technology Alliance Partner, and it holds a particularly strong position among commercial and specialty insurers in the United Kingdom. Guidewire chief executive Mike Rosenbaum said no other company matches hyperexponential’s combination of passion for insurance, technical ambition and vision for AI in insurance. Hyperexponential chief executive Amrit Santhirasenan said underwriting judgment is “the highest-leverage work insurers do,” and that the combined companies will help insurers improve loss ratios and allocate capital more effectively.
Why It Matters
The deal is a bet on what Guidewire calls agentic underwriting: AI agents working alongside underwriters and actuaries to assess risk, price it and make decisions, from complex specialty risks to high-volume commercial business. Insurers using that approach can respond to more submissions faster, with pricing and risk decisions that reflect their best underwriting judgment, Guidewire said.
That pitch matters because underwriting speed and accuracy decide whether an insurer prices risk correctly and keeps its portfolio resilient as environmental, market and regulatory conditions change. Guidewire cited a Celent report finding that AI can improve underwriting efficiency significantly in complex lines and cut loss ratios by percentage points by using previously unstructured data such as telematics, satellite imagery and loss history.
The purchase also fits a wider pattern of established firms buying AI capability outright rather than building it slowly. Itaú bought AI startup NeoSpace for $589 million to own the model builder behind its own platform, and Intel bought quantum software firm Classiq to gain a software layer it would otherwise have taken years to build. Capital is still flowing into AI tools that make existing systems cheaper to run, as shown by Nvidia’s backing of Simplismart’s $14 million round for AI inference software. Guidewire’s move applies the same logic to insurance underwriting, where a wrong price can cost far more than a slow system.
Background
Guidewire is the platform more than 570 insurers in 44 countries rely on for core property and casualty systems, with more than 1,700 successful implementation projects behind it, so hyperexponential’s software lands inside an installed base that already knows both companies, rather than a new market Guidewire must enter from scratch.
Sources: Reuters: Guidewire hyperexponential deal; Guidewire: Guidewire acquires hyperexponential
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