The TBLU fund offers investors exposure to a diverse array of water-related enterprises across all market capitalization sizes within developed nations. Its investment strategy focuses on identifying companies that generate at least 40% of their gross revenue from either water infrastructure, water equipment, or water services. Water infrastructure firms encompass those engaged in public water distribution, engineering, construction, or consulting activities. Companies providing water equipment supply crucial components such as pipes, valves, and pumps, alongside water efficiency products like filtration, treatment, and testing solutions. Service companies, meanwhile, deliver technologies designed to facilitate the management of water distribution, usage, treatment, and irrigation. The fund's portfolio typically consists of a few dozen holdings, with a notable emphasis on U.S.-based companies. Before June 5, 2018, the fund tracked the Tortoise Water Index, primarily investing in North American water companies. Prior to its merger with Ecofin on August 21, 2020, the fund operated under the name Tortoise Global Water ESG Fund and traded with the ticker TBLU. Post-merger, it was rebranded as the Ecofin Global Water ESG Fund and traded as EBLU. However, as of September 17, 2024, both the fund's name and ticker have reverted to Tortoise Global Water ESG Fund and TBLU, respectively.