Shares in Roku (Nasdaq:ROKU), which offers TV streaming devices, surged on their first day of trading, closing at

Roku, which is based in Los Gatos, California, has 15 million monthly active accounts as of June 30, 2017 that streamed in the last 30 days. The company says its uses streamed nearly 7 billion hours of music and video in the first half of 2017.