Oura Files for IPO

MarketWatch connects the filing to rising use of wearables for sleep and activity tracking.

Oura has filed publicly for a U.S. IPO. Quartz reports the smart ring maker posted $1.21 billion in revenue for the nine months ended June 30, up 74% from $697.6 million a year earlier. MarketWatch links the move to growing American interest in tracking sleep, steps and heart rates via wearables. TechCrunch highlights significant revenue growth over the past year.