Shares of Herbalife Ltd. soared more than 15 percent in after-hours trading Tuesday after the nutrition and supplement company boosted its earnings outlook this year amid higher sales in China. Meanwhile, Electronic Arts Inc. jumped more than 6 percent after the gamemaker, known for "Madden NFL," announced a $1 billion stock buyback.

However, shares of Groupon Inc. dropped 5 percent after the daily deals website missed revenue projections due to headwinds from a stronger U.S. dollar.

Here's a deeper look into companies reporting quarterly results after the closing bell:

Herbalife Boosts Profit Forecast On Strong China Sales 

Shares of Herbalife Ltd. (NYSE:HLF) skyrocketed more than 15 percent Tuesday to as high as $46.66 in extended-hours trading after the nutrition company beat Wall Street estimates and raised it outlook for the year as sales in China jumped 21 percent to $164.2 million last quarter. The gain helped offset a 34 percent drop in sales in South and Central America.

The company reported first-quarter net income of $78.2 million, or earnings per share of 92 cents, on revenue of $1.1 billion, compared with a profit of $74.6 million, or earnings per share of 74 cents, on sales of $1.26 billion a year ago. Wall Street had expected the company to report first-quarter net income of $83.75 million, or earnings per share of 98 cents, on revenue of $1.09 billion, analysts polled by Thomson Reuters said.

The company, which has been a longtime target of activist investor Bill Ackman and Pershing Square Capital for allegedly being a pyramid scheme, said a 12 percent drop in sales from a year earlier was primarily due to exchange rates from a stronger U.S. dollar. But Herbalife increased its full-year adjusted profit outlook to a range of $4.30 to $4.60 per share.

Shares of Herbalife have gained more than 6 percent this year.

herbalife Shares of Herbalife Ltd. (NYSE:HLF) soared more than 15 percent Tuesday to as high as $46.66 in after-hours trading. Photo: Google Finance

Electronic Arts' Revenue Tops Estimates On Digital Sales 

Shares of Electronic Arts Inc. (NASDAQ:EA) jumped more than 6 percent to above $62 as the gamemaker announced a $1 billion stock buyback after the maker of the "FIFA" and "Madden NFL" video games topped quarterly revenue and earnings estimates driven by strong digital sales. More than 30 million game sessions of "Battlefield Hardline" were played in last quarter, the company said in a statement Tuesday.

Electronic Arts reported fiscal fourth-quarter net income of $395 million, or earnings per share of $1.19 cents, on revenue of $896 million, compared with a profit of $367 million, or earnings per share of $1.15 cents, on sales of $914 million a year ago.

For the year, the company posted revenue of $4.319 billion, with digital sales accounting for nearly half of the company’s total revenue at $2.23 billion. 

Shares of Electronic Arts have rallied nearly 26 percent this year.  

Strong Dollar Hurts Groupon's Revenue Outlook 

Shares of Groupon Inc. (NASDAQ:GRPN) dropped as much as 5 percent Tuesday to $6.31 after the company missed revenue forecasts, while earnings came in above estimates. Although Groupon’s revenue rose 3 percent due to strong direct sales of online products, the company lowered its forecast for 2015 due to a strengthening U.S. dollar.

The Chicago-based company now expects revenue of between $3.15 billion and $3.3 billion for the year, below expectations of $3.53 billion, according to Reuters’ data. Groupon reported a first-quarter loss of $14.27 million, or an earnings-per-share loss of 2 cents, on revenue of $750.36 million, compared with a loss of $37.8 million, or an earnings-per-share loss of 6 cents, on sales of $757.6 million a year ago.

Shares of Groupon have tumbled more than 17 percent this year.