AI Data Centre Boom Stress-Tests Global Insurers as Private Capital Floods In

The artificial intelligence revolution is creating one of the most significant new challenges and opportunities the global insurance industry has faced in years. AI data centres — the massive facilities that house the computing infrastructure powering AI models — are becoming what brokers describe as a 'stress test' for insurers, as rapid technological advancement and increasingly complex financing structures present a unique set of risks.

The scale is staggering. According to McKinsey, global spending on data centres could reach $7 trillion by 2030, in what has been referred to as potentially the biggest peacetime investment project in history. Much of this spending can no longer come solely from hyperscalers (the largest cloud companies); instead, Big Tech is increasingly tapping private equity, private credit, and debt to finance the capital-intensive build-out. Private infrastructure data centre deals consistently exceeded $10 billion in the past year, according to Preqin data.

For insurers, the concentration of value creates acute capacity challenges. As Gallagher's data centre specialist explained, placing $10–20 billion or more in a single location creates capacity issues in the marketplace — while the market has appetite for these high-quality, cutting-edge builds, providing sufficient insurance capacity at a single site has become difficult. What was nearly impossible to reasonably insure in 2023 — a $20 billion campus — has become a weekly conversation in 2026. Risks are amplified when high-value assets are concentrated in high-wind or hurricane-prone zones, and supply chain disruptions can create additional exposure when large dollar amounts of imported equipment are stored in facilities clients don't own or operate.

The industry is responding with structural innovation. Some of the world's largest insurers are creating data-centre-specific underwriting avenues, while brokers are building dedicated teams. Marsh launched a dedicated digital infrastructure advisory group and, in the prior year, established 'Nimbus,' a €1 billion insurance facility for covering data centre construction in the UK. The M&A and financing boom is also drawing in transactional lawyers and specialists across real estate, power, telecom, finance, and cybersecurity. The trend intersects with broader regulatory concern about private credit exposure — including the ECB's recent warning about insurers' vulnerability to a private credit shock — given how much data centre financing now flows through these channels.