Groupon brought in $568.6 million in revenue in the third quarter 2012, the company said today.

Although revenue was up 32 percent from the same quarter of last year, it failed to meet analyst expectations, sending the stock tumbling 15 percent in after-hours trading.

The company returned adjusted earnings per share of $0.00, an improvement over last year, when it lost $0.18 per share.

Investors have been uneasy as Groupon’s lower-margin goods business has grown and its higher-margin deals business has shrunk. Adjusted annually, goods account for $500 million in revenue, Groupon said.

The company said its numbers would have been better but for unfavorable currency exchange rates in the quarter.

Groupon now has 200 million subscribers who conduct about a third of their transactions from mobile devices, the company said.