Check out the companies making headlines after the bell Wednesday:
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.