The streaming device and subscription service has priced an initial public offering in which Sky Ventures will sell more than $9m of shares.

Roku, the US-based television streaming box producer backed by media groups including Hearst and News Corp, is set to float in a $219m initial public offering it priced today.

The company will issue almost 9 million shares on the Nasdaq Global Select Market priced at $14.00 each tomorrow, while shareholders will divest almost 6.7 million additional shares.

Founded in 2002, Roku provides customers with a set-top box that allows them to stream television content from a variety of paid TV…