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.
Shares of Yum Brands, the parent company of KFC and Pizza Hut, also ticked down in extended trade after the company missed revenue expectations in its latest quarterly report.
The company said it had earnings of 68 cents per share, excluding one-time items, on $3.95 billion in revenue. Analysts had expected Yum to report earnings of about 66 cents per share on $4.02 billion in revenue, according to a consensus estimate from Thomson Reuters.
Buffalo Wild Wings's stock slipped after hours after news the company posted quarterly results that missed expectations last quarter.
The restaurant chain posted fourth-quarter earnings of $1.32 per share on $490 million in revenue. Analysts had expected the company to report earnings of $1.48 a share on $507 million in revenue, according to a consensus estimate from Thomson Reuters.
The company was in the headlines earlier Wednesday after health officials reported they were investigating the cause of a gastrointestinal illness that struck one of the company's restaurants in Kansas, sending the stock tumbling as much as 7 percent in the regular session.
Another earnings miss sent shares of insurance company MetLife down after the bell. The New York-based company posted adjusted earnings of $1.23 per share on revenue of $17.11 billion.
Among smaller companies, Glu Mobile shares spiked after the mobile gaming company debuted plans for a game featuring pop sensation Taylor Swift. And shares of Internet security firm VirnetX Holding soared after a court ruling awarded the company $625 million in a lawsuit with technology titan Apple.
— CNBC's Akane Otani, Everett Rosenfeld, Krysia Lenzo, Sarah Whitten and Jacob Pramuk contributed to this report. The Associated Press and Reuters also contributed.