RYE, N.Y.--(BUSINESS WIRE)--Gabelli & Company will host its 21st Annual Aircraft Supplier Conference on September 9 in New York City. This research meeting will feature presentations by senior management of several leading aerospace and defense companies, with an emphasis on industry dynamics, new technologies, and company fundamentals. Institutional investors should contact their sales representative to register.   Participating Companies Aerojet Rocketdyne Holdings         NYSE - AJRD Air