TBLU offers exposure to developed-market all-cap water companies. The fund selects firms that derive at least 40% of gross revenues from either water infrastructure or water equipment and/or services. Water infrastructure companies are those that provide public water distribution, engineering, construction or consulting. Water equipment companies are those who provide water pipes, valves, pumps or water efficiency products such as filtration, treatment, and testing of water. Service companies provide technologies that facilitate management of water distribution, usage, treatment, and irrigation. The resulting portfolio includes a few dozen names, heavily weighted towards the US. Prior to June 5, 2018, the fund tracked the Tortoise Water Index, providing exposure to water companies in North America. Prior to the merger with Ecofin on Aug. 21, 2020, the fund name was Tortoise Global Water ESG Fund and traded under the ticker: TBLU. After the merger, the fund name changed to Ecofin Global Water ESG Fund and traded under the ticker: EBLU. On September 17, 2024, the fund name and ticker reverted to Tortoise Global Water ESG Fund and TBLU, respectively.