Reinsurance 2 November 2026 A few years ago, a casualty sidecar was considered a niche deal. Today it is one of the most talked-about structures in reinsurance and a major theme at this year’s conferences. Here, Carrie Byler and Kenneth Durbin, from Howden Re, and Mitchell Rosenberg, from Howden Capital Markets and Advisory, discuss their growth and the capital behind them.