Top 10 US Reinsurance Companies by Net Premium

$8B in US net premiums. German-owned third-largest global reinsurer, with a life and health book that sits alongside its property and casualty business. Hannover Re's US life reinsurance underpins billions of dollars of term life policies.

SCOR is a French reinsurer with a deliberately balanced book across life and health reinsurance and property and casualty - one of the few global reinsurers not heavily weighted to one side. In the US it writes both proportional and non-proportional cover across specialty and standard commercial lines.

Everest, formerly Everest Re Group, is a Bermuda-based reinsurer writing roughly $12 billion in net premiums, with property catastrophe reinsurance as its defining line and a primary insurance arm it has been building out alongside it.

RenaissanceRe was founded in Bermuda in 1993 and built its business on proprietary catastrophe modelling — its REMS system prices property-catastrophe risk that much of the market underwrites on judgement. Alongside its own balance sheet it runs third-party capital vehicles including DaVinci Re, Medici and Vermeer, which let institutional investors take catastrophe risk directly. It roughly doubled in size by acquiring Validus Re from AIG in 2023.

$6B in net premiums, ranking third among the top 10 by net premium volume. Acquired by Alleghany Corporation in 2012 for $3.4B, then folded into Berkshire Hathaway with the 2022 Alleghany acquisition. Operates as a specialty reinsurer across casualty, property, and specialty lines in 35+ countries.

Part of Berkshire's $18B total reinsurance premiums. Stamford, CT-based General Re was acquired by Berkshire in 1998 for $22B — Buffett's largest acquisition at the time. Gen Re's global network spans 40 countries covering all major reinsurance lines.

Odyssey Group is Fairfax Financial's reinsurance and specialty insurance arm, writing worldwide treaty and facultative reinsurance through OdysseyRe, US specialty insurance under Hudson, and Lloyd's business through Newline. Fairfax has retained majority ownership since selling minority stakes to institutional investors in 2021, and the book leans toward long-tail casualty and professional lines.