Reinsurance sidecars remain a key theme in 2026, with third-party capital deployment holding broadly stable despite a rapidly evolving landscape of perils and structures, according to Aon Securities, the broker-dealer and investment banking arm of the broking firm.
Writing in the broker’s latest reinsurance market report, Aon Securities observed that increased investor appetite is helping traditional reinsurers expand their use of collateralized vehicles, even as total sidecar capacity leveled off through the first quarter of the year.
Aon Securities has been heavily tracking the expansion of the reinsurance sidecar market over recent years.
Data from the firm showed that reinsurance sidecars reached a new record high of $17 billion as of June 30th 2025, representing a 70% expansion of this segment of the ILS market in just one year, and marked a notable increased from Aon’s previous estimate that outstanding reinsurance sidecar capital had reached $10 billion at the middle of 2024.
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