Top 10 European Reinsurers by Net Premium Written

SCOR SE is France's largest and the world's 4th-largest reinsurer, writing €18B in gross written premium in 2024 with a Solvency II ratio of 203%. Founded in Paris in 1970, it employs 3,700 across 37 offices and holds an AM Best A+ (Excellent) rating. Its 2025 Forward strategy targets €1B in annual net income by reducing P&C catastrophe volatility through portfolio repositioning.

General Re (Gen Re) is a wholly owned subsidiary of Berkshire Hathaway operating as one of the world's leading life/health reinsurers, with European operations headquartered in Cologne since its 1994 merger with Aachener Rueck. Gen Re writes $10B+ in global reinsurance premiums and benefits from Berkshire's AAA financial strength. Its P&C operations focus on casualty treaty and specialty reinsurance for European carriers, with disciplined underwriting producing a 10-year average combined ratio of 91%.

PartnerRe was acquired by French mutual insurer COVEA for $9B in 2022, creating Europe's 5th-largest reinsurance group. Writing $8B+ in net premium in 2024, PartnerRe specialises in catastrophe, specialty, and L&H reinsurance across 150+ countries. Its Solvency II ratio stood at 210% post-acquisition. Bermuda-domiciled with European operations in Dublin and Paris, it leverages COVEA's €20B balance sheet to offer competitive multi-year treaty structures at the January renewals.

Everest Re Group reported $14B in gross written premium for 2024, with European reinsurance operations headquartered in Dublin. It holds an AM Best A+ rating and a Solvency II ratio of 194% for European operations. Everest's reinsurance segment generated $4.5B in GWP in 2024 with a 90.1% combined ratio. The group expanded its European presence significantly through the 2023 Lloyd's of London market re-entry and Dublin-based ILS structuring operations.

RenaissanceRe is the world's leading catastrophe reinsurer by ROE consistency, writing $9.3B in gross written premium in 2024 after its $2.9B acquisition of Tokio Marine's US and European reinsurance operations. Its Bermuda and European (Dublin) operations use proprietary RMS-based cat models to price peak-zone hurricane, earthquake, and European windstorm exposures. RenRe posted a 37% ROE in 2024, reflecting disciplined catastrophe underwriting and favourable January 1 renewals.

Arch Capital Group is a Bermuda-based specialty insurer and reinsurer with significant European operations in London and Dublin, writing $20B+ in gross written premium in 2024. Its reinsurance segment contributed $6B in GWP with an 83% combined ratio. Arch holds an AM Best A+ rating and is renowned for its cycle-aware underwriting — scaling capacity up in hard markets and retrenching in soft markets. Its European mortgage reinsurance portfolio covers €50B+ in European residential mortgage exposure.

Mapfre Re is the reinsurance arm of Spanish insurance giant Mapfre, writing €4B in gross written premium in 2024 from its Madrid headquarters. It operates across 130+ countries and is the leading reinsurer in Latin America and Iberia by market share. Mapfre Re's Solvency II ratio stood at 204% in 2024, and its combined ratio was 97.8%.