 NEW YORK--BUSINESS WIRE--Emerald Holding, Inc. NYSE:EEX Emerald or the Company and Comexposium today announced they will join forces in a strategic partnership to launch SIAL America. Comexposium, one of the worlds leading event organizers and owner of the established and successful SIAL brand, will unite with Emerald, a leader in providing market-driven, business-to-business platforms that integrate live events with a broad array of media, to produce and stage what is expected to be 