Alan Sugar founded the electronics company Amstrad and appeared as a dragon on the British television show Dragon's Den.
Sugar established Amstrad in 1968, and the company became known for consumer electronics, including computers, audio equipment and satellite television products. The name Amstrad came from Alan Michael Sugar Trading. Its products helped make home computing and related electronics more accessible to British consumers.
Sugar joined Dragon's Den as an investor after building his reputation as a technology and business entrepreneur. He was also widely known through The Apprentice, another British business television programme, but his role there was separate from his appearances in the den.
The answer is sometimes confused with Peter Jones, another investor strongly associated with technology and electronics. Jones founded Phones International Group, whereas Amstrad is specifically linked to Sugar. That company-founder distinction makes the clue unambiguous.