ADTN

Adtran Holdings, Inc.

A maker of fiber-based networking hardware and software that carries broadband traffic for telecoms, cable operators, businesses, and government agencies. Its product line includes the FSP 3000 optical transport gear and the Mosaic One software platform that helps run modern fiber networks. Founded in 1985 by three engineers in Huntsville, Alabama, in the wake of the AT&T breakup, the company merged with German firm ADVA Optical Networking in 2022 to form the current holding company. Its name is a mashup of "advanced transmission," not an acronym.