Marsh Risk, part of Marsh, has unveiled Nimbus Casualty, an insurance facility designed to provide excess general liability cover during the construction phase of digital infrastructure projects in the US.
Nimbus Casualty offers up to $75m in coverage capacity, with a minimum attachment point set at $25m.
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The facility is backed by a panel of A+ rated insurers from Lloyd’s and the London market.
It employs Marsh Risk’s proprietary XSellence excess casualty form, which provides follow-form coverage across excess casualty programmes and is intended to simplify claims handling and enhance coverage clarity.
Marsh Risk International Placement casualty head Paul Woodward said: “The US casualty market presents increasing complexity and challenges, especially for digital infrastructure clients managing large-scale, high-value projects with long-term liability exposures.
“With Nimbus Casualty, we combine Marsh Risk’s market-leading construction expertise with our market-leading excess casualty form to provide clients with the advice and coverage certainty they need to efficiently safeguard their digital infrastructure investments.”
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By GlobalDataThis development follows Marsh Risk’s extension of its Nimbus facility, which supports large-scale data centre construction with up to $2.7bn in limits for construction all-risks, delay in start-up, property damage and business interruption insurance.
Marsh Global Digital Infrastructure leader Mike Mathews added: “By integrating expertise across capital management, construction, energy solutions and risk resilience, we help our clients not only build more efficient and powerful facilities but also ensure their long-term operational success in a rapidly transforming digital economy.”
In the fourth quarter of 2025, Marsh Risk added $3.7bn to revenues, a 10% increase from the same period in 2024.
