GAMCO Investors, Inc. is a holding company. The Company is a provider of investment advisory services to open and closed-end funds, institutional and private wealth management investors principally in the United States. The Company operates through the investment advisory and asset management business segment. It manages assets on a discretionary basis and invests in securities through various investment styles. Its assets under management are organized into three groups: Institutional and Private Wealth Management; Open and Closed-End Funds, and the GAMCO International SICAV (SICAV). The Company provides advisory services to a range of investors, including corporate retirement plans, foundations, endowments and private wealth clients, and also serves as sub-advisor to third-party investment funds, including registered investment companies. As of December 31, 2016, it had provided advisory services to 21 open-end funds, 15 closed-end funds and one exchange traded managed fund.