Babson Capital Corporate Investors (the Trust), formerly MassMutual Corporate Investors, is a closed-end investment company. The Trust's investment objective is to maintain a portfolio of securities providing a fixed yield. The Trust's principal investments are privately placed, below-investment grade, long-term corporate debt obligations with equity features, such as warrants, conversion rights, or other equity features and preferred stocks. The Trust purchases these investments, which are not publicly tradable, directly from their issuers, which tend to be smaller companies. In addition, the Trust may temporarily invest in marketable investment grade debt securities, other marketable debt securities (including high yield securities) and marketable common stocks. Babson Capital Management LLC manages the Trust on a total return basis.