AM Best backs Munich Re's $575 million cyber bet

Munich Re has agreed to buy At-Bay, the US cyber insurer, for $575 million in enterprise value, and Reinsurance News reports that AM Best has placed At-Bay Specialty Insurance Company under review with positive implications, keeping the unit's A- (Excellent) financial strength rating and 'a-' long-term issuer credit rating in place while it studies the transaction. The deal is expected to close in the first quarter of 2027, subject to customary conditions including regulatory approvals.

After closing, At-Bay will sit under Hartford Steam Boiler, Munich Re's specialty-insurance unit whose long-standing cyber underwriting expertise is expected to support the business's growth in the US. Because At-Bay is an InsurSec provider—selling cyber insurance alongside risk-management services—the acquisition is a distribution-plus-product bet, adding At-Bay's underwriting platform to a unit that already knows the line. That structure also gives Munich Re a seat inside the policyholder relationship through At-Bay's risk-management services, a position a traditional reinsurance placement would not offer.

AM Best said the review 'reflects the potential financial and operational benefits that ABSIC may derive from being part of a significantly larger insurance organisation, which is of greater financial strength.' The central question for Munich Re is whether At-Bay can scale inside a larger group without losing the speed that makes a cyber insurer useful, and for distribution partners the review's direction reads as the specialty carrier becoming more solid under a bigger parent.

At that price, At-Bay is a bolt-on for a group at the top of AM Best's ranking of the world's largest IFRS-17 reinsurers, and the strategic direction matters more than the size. Munich Re, which reclaimed the top reinsurer ranking on currency math, is spending on a line where underwriting models are still developing rather than on commodity capacity in a softening property-cat market, even as this publication has argued that reinsurers' discipline faces a 2027 test.

AM Best has projected a record $705 billion of reinsurance capital and sees competitive pressure rising again in 2027 as ILS money adds to the shift toward cedents; buying At-Bay now puts underwriting density in place before that pressure fully arrives. Munich Re is betting on cyber models that have to prove themselves as the book grows, and the review will stay open until AM Best has assessed parental support, integration plans, and the effect on At-Bay's business plans—a process that runs alongside the expected first-quarter 2027 close.