 GREENWICH, Conn.--BUSINESS WIRE--GAMCO Investors, Inc. GAMCO NYSE: GBL announced today that it expects to report first quarter 2021 diluted earnings in the range of 0.55 to 0.59 per share versus 0.42 per share for the first quarter of 2020. Assets under management were 33.4 billion at March 31, 2021 as compared to 27.5 billion at March 31, 2020. GAMCO will be issuing further details on its financial results in early May. About GAMCO Investors, Inc. GAMCO is known for its research-d 