 GREENWICH, Conn.--BUSINESS WIRE--GAMCO Investors, Inc. GAMCO NYSE: GBL announced that it will be filing a new 500 million shelf registration statement to replace the previously expired 500 million shelf. The shelf will allow the Company to issue common stock, preferred stock, debt securities, convertible stock, warrants, and rights. In addition, the Company announced today that it expects to report second quarter 2021 diluted earnings in the range of 0.62 to 0.66 per share versus 0 