Markel Group's Nephila Capital Partners with SEI to Enhance Operations in ILS Market
- Nephila Capital, a subsidiary of Markel Group, partners with SEI to enhance operations in North America and the UK.
- The collaboration aims to improve efficiency and position Nephila for growth in the expanding ILS market.
- Nephila seeks to leverage SEI's technology to navigate complexities and enhance client service in reinsurance.

Nephila Capital Partners with SEI to Optimize Operations in Expanding ILS Market
Nephila Capital Ltd., a key player in the reinsurance sector and a subsidiary of Markel Group Inc., has selected SEI® to enhance its operational capabilities across North America and the UK. Nephila, which specializes in managing reinsurance risk with over $7 billion in assets, seeks to streamline its back- and middle-office functions amidst an evolving insurance-linked securities (ILS) market projected to grow from $100 billion to $200 billion by 2032. This strategic partnership is not merely about improving operational efficiency but also aims to position Nephila to capitalize on emerging market opportunities.
In a statement, Sean McDade, Nephila's Head of Operations, emphasizes the necessity for a partner with a proven history and scalable infrastructure. SEI's robust technological foundation and customizable solutions align seamlessly with Nephila's strategic objectives. As the ILS market becomes increasingly competitive, having a reliable partner to handle essential services such as reconciliation, payment processing, and data aggregation is critical for driving operational excellence and client satisfaction. This collaboration comes at a pivotal moment, as Nephila seeks to leverage SEI's resources to navigate the complexities of the reinsurance landscape effectively.
Bryan Astheimer, Head of SEI's Investment Managers business in EMEA, expresses enthusiasm for the partnership, pointing out that SEI's global presence and stability will significantly benefit clients in the ILS sector. With SEI managing approximately $1.7 trillion in assets as of mid-2025, its established reputation as a leading provider of financial technology and asset management services bodes well for Nephila's ambitions. Together, they aim to enhance operational effectiveness and client service as Nephila positions itself for substantial growth in the dynamic ILS market.
In other developments, Nephila's strong focus on innovation and operational efficiency reflects the broader trends within the reinsurance industry. As market dynamics shift, investment managers are increasingly prioritizing partnerships that enhance their service offerings and operational capabilities. This collaboration with SEI is a testament to Nephila's commitment to staying ahead in a competitive landscape.
Overall, the partnership with SEI signifies a strategic advancement for Nephila Capital, enabling it to better serve its clients while preparing for the anticipated growth in the ILS market. By leveraging SEI's technological expertise, Nephila aims to enhance its operational framework and capitalize on new opportunities in the reinsurance sector.