The Janus Henderson Sustainable Multi-Asset Allocation Fund (JSMFX) is a mutual fund that focuses on investing in a diverse range of assets, including stocks, bonds, and alternative investments, with a focus on sustainability. The fund is managed by Janus Henderson Investors and aims to provide long-term growth while considering environmental, social, and governance factors. The "D Shares" designation indicates that the fund has a sales charge, which is typically lower than other share classes.