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Tokio Marine GX (TMGX) has launched a nine-strong partner ecosystem covering the full green transition value chain, spanning nuclear, marine, carbon credits, clean energy technology and private credit, one year after its launch.
In May 2025, Tokio Marine Holdings, Inc. launched TMGX as an underwriting business that provides specialist insurance and risk management solutions to firms looking to decarbonise their operations and unlock new green opportunities. It offers a single point of access for partners and clients committed to more sustainable practices.
The new ecosystem extends TMGX’s reach across the green transition value chain and into specialist and emerging areas of risk. Its offering now covers 18 distinct areas of green transition risk, with premium diversifying beyond its renewables core.
The ecosystem spans nine specialist partners. Ariel Green provides clean energy technology performance insurance, while Ocean Special Risks operates as a specialist marine MGA. Artio Carbon provides carbon credit insurance, while New Energy Risk covers cleantech technology performance. Private credit expertise sits with Avondale Private Capital, and Cedar Crown handles forest and land risk. In nuclear, Northcourt provides insurance including NC Fusion, while Project Safe/Nuclear Risk Insurers covers construction and decommissioning. Elysia rounds out the ecosystem with sustainable aquaculture cover.
The initiative aims to diversify TMGX’s book beyond its renewables core of traditional property and liability cover for onshore and offshore wind, solar and battery storage.

Tokio Marine Group’s decarbonisation-related insurance premiums, led by TMGX, reached ¥55.5 billion (~$347 million) in full-year 2025, driven by underwriting for clean energy-related projects. This exceeds the group’s FY26 target a year ahead of schedule. A new FY30 target of ¥100 billion (~$625 million) has now been set.
TMGX offers up to $500 million in capacity on any single risk. Claims capability is embedded alongside underwriting, drawing on a dedicated claims team and more than 25 years of claims data.
Ben Kinder, Chief Underwriting Officer of Tokio Marine GX, said, “I am delighted by the progress we have made in just a year. We have proven that the model works and that the demand is clear and growing. In the past 12 months we have diversified our offering, and built an ecosystem of specialist partners to address decarbonisation risk across multiple sectors and stages of the transition journey. We have also played a key role in enabling Tokio Marine Group to hit its decarbonisation-related insurance premiums target early, and now set an even more ambitious goal. We can look forward to the next year with confidence.”
Fraser McLachlan, Chairman of Tokio Marine GX, said, “Our ambition at TMGX has always been to insure every part of the decarbonisation journey, supporting our clients across the rapidly evolving green transition landscape. This is not about developing a single product or addressing a single technology; it is about building a much wider ecosystem of insurance solutions, expertise and partnerships that can support the transition to a Net Zero economy.
“TMGX’s recent recognition for Most Innovative Insurance Product of the Year at the Insurance Insider Honours demonstrates what can be achieved when we combine deep underwriting expertise with innovation and a willingness to approach emerging risks differently.
“This marks the start of a much wider ecosystem. We will continue to bring together new partners, new expertise and innovative insurance solutions as we build out insurance products across every part of the value chain.
“Ultimately, our ambition is simple: wherever our clients are on their decarbonisation journey, we want TMGX and Tokio Marine to be there to help them manage the risk, unlock opportunity and accelerate the transition towards Net Zero.”
Oliver Litterick, Head of Renewables, Tokio Marine GX, added, “The team has continued to build a strong and diverse offering as TMGX. For decades, we have delivered solutions for conventional renewables when others wouldn’t, and that same willingness to evolve and diversify is reflected in the new solutions we are developing to support the green transition.
“The partners we have brought in extend this approach across nuclear, marine, carbon capture and renewables. We look forward to building on this momentum, both within TMGX and across the Tokio Marine Group.”
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