TortoiseEcofin focuses on essential assets – those assets and services that are indispensable to the economy and society. TortoiseEcofin focuses on essential assets – those assets and services that are indispensable to the economy and society. We strive to make a positive impact on clients and communities by investing in energy infrastructure and the transition to cleaner energy and by providing capital for social impact projects focused on education and seniors housing. TortoiseEcofin brings together strong legacies from Tortoise, with expertise investing across the energy value chain for more than 20 years, and from Ecofin, which unites ecology and finance and has roots back to the early 1990s.