Check out the companies making headlines after the bell Wednesday:
Shares of GoPro fell in extended-hours trading after the company posted quarterly results Wednesday that missed analysts' expectations, the latest setback in a company beset with a declining stock price. The wearable camera maker reported an adjusted fourth-quarter loss of 8 cents per share, ex-items, on $437 million in revenue, less than the break-even earnings and $496 million revenue Wall Street expected.
GoPro's stock is down more than 80 percent over the past year as sales slowed at retailers. The company has pledged to cut costs and focus on software solutions going forward. Shares of fellow camera company Ambarella also tumbled after the news.
But shares of CBS popped after hours after the media company announced it would replace ailing chairman Sumner Redstone, who has been the subject of controversy amid accusations of mental incompetency. Viacom is expected to make a similar announcement Thursday — its shares also bounced after hours.