July 31 GoPro Inc, which makes cameras worn by surfers, skydivers and other action junkies to record and post their exploits online, reported a bigger quarterly loss as costs nearly doubled.
GoPro shares fell 9.3 percent to $43.50 in extended trading.
The net loss attributable to GoPro stockholders widened to $19.8 million in the second quarter from $5 million a year earlier, in the company's first quarterly results after its debut on the Nasdaq last month.
The company said revenue jumped 38 percent to $244.6 million in the quarter but operating expenses rose to $119.5 million from $62.8 million a year earlier. (Reporting by Abhirup Roy in Bangalore; Editing by Rodney Joyce)