By Michael Dabaie

Roku Inc. shares were up 14% to $182.27 in morning trading.

NBCUniversal's Peacock streaming service said the Peacock app is now available nationwide on Roku, reaching households with an estimated 100 million people.

In addition to the Roku platform, Peacock is available on platforms including Apple devices, Google platforms and devices, Microsoft's Xbox One devices, VIZIO SmartCast TVs, Sony PlayStation 4 and LG Smart TVs.

Write to Michael Dabaie at michael.dabaie@wsj.com