Elementum Advisors Grows ILS AUM to $3.8bn, Despite White Mountains Investment Declining

Why It Matters

The shift shows ILS managers can replace shrinking anchor capital with diversified investors, reinforcing demand for catastrophe‑bond exposure. It also signals broader resilience and maturation of the alternative reinsurance market.

Key Takeaways

• AUM reached $3.8 bn, up $100 m YoY.
• White Mountains fund stake fell to $50 m in 2025.
• Third‑party investors filled capital gap, e.g., NZ super fund.
• New collateralized reinsurance and wind‑focused cat‑bond funds launched.
• Equity ownership remains 26.6% despite reduced fund investment.

Pulse Analysis

The insurance‑linked securities (ILS) sector has entered a phase of steady capital inflows, and Elementum Advisors exemplifies this trend. By the start of 2026 the firm reported $3.8 bn in assets under management, modestly higher than the previous year but reflective of a broader pool of deployable capital. This growth comes at a time when investors are seeking non‑correlated returns amid volatile equity markets, positioning ILS products as attractive yield generators.

A notable dynamic is the reduction of White Mountains’ direct fund investment, which slipped from $161 m in 2023 to $50 m by the end of 2025. Despite this, White Mountains retains a 26.6% equity interest, indicating confidence in Elementum’s strategic direction. The shortfall was quickly bridged by new institutional partners, most prominently the New Zealand Government Superannuation Fund, which added Elementum to its ILS manager roster. Concurrently, Elementum broadened its product suite, launching enhanced collateralized reinsurance funds and a wind‑focused catastrophe‑bond strategy, thereby appealing to a wider investor base.

Elementum’s ability to sustain AUM growth while an anchor investor scales back highlights a maturing ILS market where capital sources are diversifying. Managers are increasingly leveraging product innovation and geographic outreach to attract sovereign wealth funds, pension schemes, and other long‑term investors. This trend suggests that future ILS capacity will be less dependent on single large stakeholders and more driven by a competitive ecosystem of diversified capital, supporting continued expansion of the catastrophe‑bond market and reinforcing its role in global risk transfer.