Check out the companies making headlines after the bell Wednesday:
Fitbit, the company behind the popular fitness bands, plunged 13 percent although it beat earnings and sales forecasts and issued strong guidance.
Coffee products provider Keurig saw its stock tumble nearly 30 percent after it topped earnings projections of 79 cents a share by just a penny and missed revenue estimates.
Weight Watchers surged about 18 percent after the fitness provider beat earnings estimates and raised its full-year guidance.
21st Century Fox shares fell about 1 percent after the media firm topped earnings projections, but missed on sales. The company also announced a 15-cent dividend and authorized a $5 billion stock buyback.
Electric auto maker Tesla Motors saw its shares fall about 5 percent after it lowered its guidance. The company also reported a loss of 48 cents a share on $1.20 billion in revenue, verses estimates of a loss of 60 cents a share on $1.18 billion in revenue.
New York-based broadcasting firm CBS beat on the top and bottom lines as its cable network sales grew about 19 percent thanks to a boost from increased pay-per-view boxing viewership. However, the company's other major segments saw revenue declines, sending the stock down about 2 percent.
Shares of online retail operator Zulily rose about 8 percent on better-than-expected second-quarter earnings and revenue results.
Herbalife shares popped 8 percent on positive earnings and sales figures. The weight loss management firm also raised its 2015 earnings guidance.
Transocean jumped about 3 percent after the oil-and-gas driller reported adjusted earnings of 93 cents a share on $1.88 billion in revenue, according to Dow Jones.