Guidewire to Buy hyperexponential for $1.7bn

Guidewire, which supplies core software to more than 570 property and casualty (P&C) insurers, has agreed to buy hyperexponential, a London company whose AI tools help insurers decide which commercial risks to take on and at what price. Guidewire announced on 27 October that it will pay a base price of $1.7 billion in cash, “subject to adjustments”, and up to $400 million more if hyperexponential hits “specified recurring revenue targets”.

That makes the deal worth up to $2.1 billion if every earn-out target is met. It also puts the most commercially sensitive part of an insurer’s work, the call on whether a risk is worth writing, inside a company best known for the core systems that hold the policy and risk records behind those calls.

In brief

Guidewire will buy all of hyperexponential (known as hx) for $1.7bn in cash, plus up to $400m depending on recurring revenue after the deal closes.
hx says its software has powered underwriting decisions on more than $75bn of commercial premium a year, with a strong base among UK commercial and specialty insurers.
Guidewire expects to close by the end of January 2027 and is borrowing $1bn from Bank of America and Citibank to help pay.

The price includes a retention pool and a revenue test

Guidewire’s Form 8-K filing with the US Securities and Exchange Commission says it is buying “all of the issued share capital” of Hyperexponential Ltd from its shareholders. The $1.7 billion is subject to adjustments “including for working capital, cash, indebtedness, and certain retention amounts”. The investor presentation filed alongside it says the cash figure is “inclusive of employee retention pool”, and that the deal adds a team of about 300.

The extra $400 million is payable only on recurring revenue earned after closing. Guidewire has not said what the targets are or over what period they run.

The filing also says the acquisition “is not subject to any conditions to closing”, and that completion does not depend on the new loan. Guidewire expects to close in the second quarter of its 2027 financial year, which its presentation says ends on 31 January 2027.

To pay for it, Guidewire has a binding commitment from Bank of America and Citibank for a $1.0 billion senior secured term loan, maturing in December 2029, with the rest coming from cash. It says the deal will not change its first-quarter guidance, issued on 3 September, and that it will update its full-year outlook on its December earnings call.

What hx sells, and to whom

Guidewire describes hx as an “agentic platform provider of AI-native underwriting and pricing software for commercial lines P&C insurers”. Its own description lists the jobs the platform covers: “submission triage, risk assessment, pricing, rating, and portfolio steering”. In plain terms, it helps an insurer sort incoming requests for cover, judge each risk, set a price and manage the overall mix of business. Its customers include Aviva, Allianz, Sompo, Beazley, Markel, HDI, Cincinnati Financial, Convex and Bowhead, according to the release.

The two companies already work together: hx is a member of Guidewire’s PartnerConnect technology alliance. Guidewire says its own customers are more than 570 insurers in 44 countries.

The UK is where hx is strongest. Guidewire says it has “a particularly strong presence among commercial and specialty insurers in the United Kingdom”, and its presentation lists “European and London Market reach” as one of the things hx brings, with customers “from Lloyd’s to US commercial lines”.

Amrit Santhirasenan, hx’s co-founder and chief executive, said the company was founded “on the conviction that underwriting judgment is the highest-leverage work insurers do”. Guidewire’s chief executive, Mike Rosenbaum, said the two were “uniquely positioned to deliver industry-specific AI solutions that will transform commercial underwriting”.

Guidewire expects hx to add at least 650 basis points to its annual recurring revenue (ARR) growth in the 2027 financial year, and at least 150 basis points a year to organic ARR growth from 2028. It has not disclosed hx’s revenue.

Why Guidewire is paying for judgement, not records

Guidewire’s business has been the plumbing of insurance: the core systems that hold an insurer’s policy and risk records. hx sits one step earlier, at the moment an insurer decides whether to quote and at what rate. Buying it is a bet that insurers will want the record and the decision from one supplier, and that AI agents will make that decision layer more valuable than the plumbing.

The structure shows where Guidewire is cautious. Up to $400 million depends on revenue after closing, so part of the risk stays with the sellers, and the retention pool inside the $1.7 billion is there to keep the people who built the pricing models. In a business sold on actuarial skill, losing that team would cost more than any integration delay.

There is a regulatory edge for UK insurers too. Pricing and underwriting are among the decisions supervisors examine most closely, and the UK’s Financial Conduct Authority has said financial firms’ incident reporting, insurers’ included, should cover significant AI failures and near-misses. The Financial Stability Board’s 12 sound practices for AI give boards and senior management a “pivotal role” in how firms adopt it. As “agentic underwriting” moves from a sales term to production use, insurers will have to show who answers for a price an agent helped set.

The deal also fits a pattern of financial firms buying AI capability outright rather than renting it. Itaú agreed this week to buy NeoSpace, the start-up that trains its models. And start-ups such as Harbor are trying to insure the risks of AI agents themselves, a sign that the industry is still working out how to price the technology it is now buying.

The next fixed date is Guidewire’s December earnings call, where it has promised updated guidance that includes hx. The acquisition agreement itself will be filed with its quarterly report for the period ending 31 October.