Calvert Small-Cap Fund (CSCCX) is an open-end mutual fund that seeks long-term capital appreciation through investment primarily in small-cap common stocks of U.S. companies, normally investing at least 80% of its net assets, including borrowings for investment purposes, in such securities; it employs a responsible investing strategy incorporating environmental, social, and governance (ESG) factors alongside traditional financial analysis. The fund offers multiple share classes, including Class C (CSCCX), Class A, Class I, and Class R6, with varying minimum investments and fee structures such as waivers that reduce the net expense ratio below the gross; it benchmarks performance against the Russell 2000 Index, targeting small blend style equities with higher volatility and liquidity risks typical of smaller companies. Launched on April 1, 2005, the fund is managed by Calvert Research and Management, headquartered at 1825 Connecticut Avenue NW, Suite 400, Washington, DC, and operates exclusively in the United States as part of Calvert, the responsible investing division of Morgan Stanley Investment Management. In recent developments, Calvert integrated fully into Morgan Stanley Investment Management following the 2022 acquisition of Eaton Vance by Morgan Stanley, enhancing its distribution and research capabilities through MSIM's platform; the fund maintained its ESG focus amid 2024-2025 market volatility, with ongoing fee waivers extended at least through the current prospectus period to support competitiveness in the small-cap segment.