The Ecofin Sustainable and Social Impact Term Fund, formerly known as the Tortoise Essential Assets Income Term Fund (and before that, Tortoise Essential Assets Income 2024 Term Fund, Inc.), operates as a closed-ended, balanced mutual fund. Launched in 2017 and domiciled in the United States, it is managed by Tortoise Capital Advisors L.L.C. The fund's primary objective is to invest in both equity and fixed-income markets, specifically targeting companies within vital "essential asset" sectors. These encompass education, housing, healthcare, social and human services, power, water, energy, infrastructure, basic materials, industrial, transportation, and telecommunications. Its portfolio diversifies across stocks of companies of all market capitalizations, as well as corporate and government debt securities, including high-yield corporate debt of any maturity. Additionally, the fund allocates capital to private equity investments. To build its portfolio, the fund employs a rigorous investment process that combines fundamental and quantitative analysis, with a focus on proprietary financial, risk, and valuation models.