The outstanding market for collateralized reinsurance sidecar structures has reached a new record high of $23 billion in 2026, representing roughly 50% growth since the end of 2024, according to estimates from Aon Securities.
Aon Securities has been tracking the expansion of the reinsurance sidecar market over recent years.
Data from the company showed that outstanding reinsurance sidecar capital had reached $10 billion at the middle of 2024.
The reinsurance sidecar market then increased by a staggering 70%, reaching a new record high of $17 billion by the end of June 30th 2025.
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