Aon Expects Market Dynamics to Accelerate Legacy Activity at Lloyd’s

Key Takeaways

• Legacy specialists have taken on nearly $15 bn of reserves since 2010.
• Average Lloyd’s legacy deal is about $300 million; 50% fall between $100‑300 million.
• 25% of deals are under $100 million, while 20% exceed $400 million.
• Over 75% of Lloyd’s syndicates have not yet completed a legacy transaction.
• Repeat sellers represent roughly two‑thirds of reserves transferred since 2015.

Pulse Analysis

The legacy market at Lloyd’s is evolving from a niche clean‑up solution into a mainstream capital‑management instrument. Aon’s latest report highlights how a softer reinsurance cycle, heightened M&A activity, and tighter underwriting discipline are creating a fertile environment for run‑off deals. By leveraging Reinsurance‑to‑Close syndicates, carriers can offload historic risk, free up capital, and gain access to sophisticated claims expertise, all while benefiting from data‑driven reserving models that improve pricing accuracy.

RITC specialists such as RiverStone, Enstar, Premia, Compre and Marco Capital have collectively taken on almost $15 bn of reserves, underscoring the scale of the market. The average transaction size of just under $300 million reflects a sweet spot that balances portfolio complexity with pricing efficiency. Smaller deals—representing a quarter of activity—still play a vital role for insurers seeking targeted risk relief, while mega‑transactions like the £1.2 bn ($1.5 bn) MS Amlin‑RiverStone deal illustrate the appetite for large‑scale balance‑sheet optimization.

Looking ahead, Aon expects legacy activity to accelerate as more than three‑quarters of Lloyd’s syndicates remain untapped. Repeat sellers account for roughly two‑thirds of reserves transferred, indicating that legacy solutions are becoming a recurring strategic lever. As carriers confront long‑tail uncertainty in lines such as U.S. casualty and aviation, proactive legacy transactions will be essential for preserving underwriting capacity, stabilizing earnings, and maintaining competitive flexibility in a potentially softening insurance cycle.