 GREENWICH, Conn.--BUSINESS WIRE--GAMCO Investors, Inc. GAMCO NYSE: GBL announced today that it expects to report third quarter 2021 diluted earnings in the range of 1.08 to 1.12 per share versus 0.62 per share for the third quarter of 2020. Assets under management AUM were 33.5 billion at September 30, 2021 as compared to 29.7 billion at September 30, 2020. Equity AUM were 31.9 billion at September 30, 2021 as compared to 26.8 billion at September 30, 2020. GAMCO will be issu 