Groupon filed revised documents to the Securities and Exchange Committee that now reveal the deals company lost $255.4 million in the first half of calendar year 2011 on revenue of $1.52 billion.

As expected, the S-1 no longer makes any reference to its Adjusted Consolidated Segment Operating Income (ACSOI) accounting metric, a controversial approach that had excluded marketing costs along with stock-based compensation and acquisition-related expenditures.

The amended net loss is nearly triple the $36 million loss from Q2 2010. That figures in the hiring surge Groupon undertook, adding thousands of employees, and a decrease in marketing costs from $208 million during the first quarter of 2011 down to $170 million for the subsequent three months.

Quarterly revenue rose from $644.7 million in the first quarter to $878 million in the second, while net loss from nonrecurring items edged down from $113.9 million to $111.3 million for those same two quarters.

It’s worth noticing, however, that there was a substantial charge for the redemption of preferred stock in the first quarter.

Groupon reports that it has operations serving 175 North American markets and 45 countries. It further says it had a total of 115.7 million subscribers at the end of the second quarter of 2011, with 23 million of them having purchased Groupons.

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Photo courtesy of Groupon, used under Creative Commons license