NEW YORK | July 13, 2026
Marsh Risk, the world’s leading insurance broker and risk advisor and a business of Marsh (NYSE: MRSH), today launched MLOne, a first-of-its-kind US lead umbrella casualty facility designed to deliver stronger protection and clearer claims coordination for clients operating in an increasingly litigious environment.
MLOne represents the next evolution of Marsh’s expanding suite of excess casualty facilities, including its Bermuda-based excess casualty facility BX1 and its US-based excess casualty facility MX1, that aggregate and coordinate capacity from multiple insurers into a single block of follow-form coverage with a single claims decision maker.
Designed to sit above any primary casualty program, MLOne consolidates up to $30 million of capacity into a single, quota-share lead umbrella block led by Allianz Commercial, which will assume claims handling for the entire quota share. MLOne can be combined with BX1 and MX1 in a single program, further reducing contract inconsistencies and simplifying claims resolution.
“MLOne represents an important step forward for clients seeking clear, dependable umbrella protection,” said Muffadal Lokhandwala, US Excess Casualty Practice Leader, Marsh Risk. “Clients will gain greater coverage certainty and a more efficient placement and claims process — helping to reduce gaps and litigation risk, while improving program stability and balance sheet protection.”
Dan Aronson, US Casualty Leader, Marsh Risk, added: “MLOne builds on the momentum of our follow-form product family. Together with MX1 and BX1, we’re delivering a consistent, market-tested framework that simplifies excess casualty placement and enhances client outcomes. Our goal is to continue growing this suite of solutions, so clients have predictable, scalable options across their casualty portfolios.”
“Allianz’s lead insurer role on this facility reflects our conviction that the casualty market needs smarter, more client-centered solutions. When insureds are navigating increasingly complex claims environments, having a single, accountable claims leader within the quota share structure makes a tangible difference — both in outcomes and in confidence. We are delighted to partner with Marsh Risk to deliver the certainty, efficiency, and advocacy that insureds require in today’s casualty market,” said Mary Ann Stewart, Allianz Commercial’s Regional Head of Liability in North America.
Marsh (NYSE: MRSH) is a global leader in risk, reinsurance and capital, people and investments, and management consulting, advising clients in 130 countries. With annual revenue of $27 billion and more than 95,000 colleagues, Marsh helps build the confidence to thrive through the power of perspective. For more information, visit corporate.marsh.com, or follow us on LinkedIn and X.
US & Canada Media Relations Leader, Marsh Risk & Guy Carpenter
United States
