Alinco
Makers of handhelds, mobiles, HF radios, scanners, and power supplies
Icom America
Makers of all types of radios: Ham, Avionics, Land Mobile, Consumers, and Scanners
Kenwood
Makers of Handhelds, Mobiles, and HF rigs (as well as many other types of audio equipment, such as car stereos, etc)
Yaesu
Amateur Radio division of Vertex Standard, with handhelds, mobile, and HF rigs
Anli
Manufacturers of antennas and accessories
Andrew Corporation
Makers of a wide variety of antennas