St. Louis−based Belden Inc. delivers a comprehensive product portfolio designed to meet the mission-critical network infrastructure needs of industrial, enterprise and broadcast markets. With innovative solutions targeted at reliable and secure transmission of rapidly growing amounts of data, audio and video needed for today's applications, Belden is at the center of the global transformation to a connected world. Founded in 1902, the company is headquartered in St. Louis and has manufacturing capabilities in North and South America, Europe and Asia.

Belden produces precision wire and cable products for the bandwidth and impedance-sensitive broadcast and communication industries. Belden cables most often used by broadcasters are specialized coaxial or multi-conductor. The company manufactures a great number of specialized cables for a multitude of specific uses.

Grass Valley and formerly Miranda are also Belden brands. Miranda products were rolled into the Grass Valley product line at NAB 2014. In 2018, Belden acquired Snell Advanced Media (SAM), which is now part of Grass valley. 

Grass Valley makes and markets an extensive array of professional solutions for live production, news and playout. Among them are Broadcast Cameras, Production Switchers, Integrated Production such as Ignite, Video Editors, Converters, Broadcast Infrastructure, Servers/Replay and Media Workflow hardware and software products. See Grass Valley for more details.

In June 2017, Belden acquired KVM manufacturer Thinklogical.