MFJ Enterprises, founded in 1972 by Martin F. Jue, is a manufacturer of a broad range of products for the amateur radio market. They specialize in station accessories, such as antenna tuners and antenna switching equipment. As of 2014, MFJ was responsible for manufacturing more amateur radio products than any other company in the world. Representative products have been described in QST Magazine and CQ Amateur Radio. The initials "MFJ" in the company name are those of the founder, Martin F. Jue (ham radio callsign K5FLU). On April 26th, 2024, Martin F. Jue announced that as of May 17, 2024, the company will cease on-site production at their Starkville, Mississippi, facility. Ameritron, Hy-Gain, Cushcraft, Mirage, and Vectronics brand products will be affected by the shutdown.

Subsidiaries

MFJ owns five subsidiary companies: