Markel Group enters $4.8 billion reserve adverse development cover deal with Enstar unit
Markel's insurance subsidiaries entered an Adverse Development Cover Agreement with Cavello Bay Reinsurance, a wholly owned subsidiary of Enstar Group Limited, covering $4.8 billion of net reserves on a run-off global reinsurance portfolio and certain exited lines. Markel will pay a $2.4 billion reinsurance premium, settled through a transfer of assets at closing, and the deal is expected to close by the end of the fourth quarter of 2026 subject to regulatory approval. Markel's press release says the net impact on fourth quarter underwriting results is expected to be immaterial.
Key points
- Subject reserves of $4.8 billion; Markel retains the first $2.6 billion of covered losses, and the reinsurer covers the next $2.3 billion.
- Adverse development coverage of $1.2 billion above the $4.8 billion of reserves.
- Reinsurance premium of $2.4 billion, with $500 million of transferred assets sent to the reinsurer outright and the balance placed in a trust account.
- Closing expected by the end of the fourth quarter of 2026, subject to regulatory approval; the agreement covers losses paid on or after April 1, 2026.
The filing
Written by AI on Nov 9, 2026, 8:36 AM ET, from this filing only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on October 28, 2026.
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