 RYE, N.Y.--BUSINESS WIRE--Gabelli Funds, LLC, will host the 7th Annual Waste Environmental Services Symposium on Thursday, March 18, 2021, via webcast. This timely conference will feature presentations by senior management of several leading companies, with an emphasis on industry dynamics, new technologies, and company fundamentals. Presenting Companies: Sharps Compliance Corp. NASDAQ: SMED Waste Management, Inc. NYSE: WM Waste Connections NYSE: WCN Crown Holdings NYSE: CCK Cas 