Alpha Natural Resources (NYSE: ANR) reported earnings on Aug. 8. Here are the numbers you need to know.

The 10-second takeaway
For the quarter ended June 30 (Q2), Alpha Natural Resources beat expectations on revenues and missed expectations on earnings per share.

Compared to the prior-year quarter, revenue increased significantly and GAAP loss per share increased.

Margins contracted across the board.

Revenue details
Alpha Natural Resources booked revenue of $1.85 billion. The 13 analysts polled by S&P Capital IQ wanted to see revenue of $1.78 billion on the same basis. GAAP reported sales were 16% higher than the prior-year quarter's $1.59 billion.

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Source: S&P Capital IQ. Quarterly periods. Dollar amounts in millions. Non-GAAP figures may vary to maintain comparability with estimates.

EPS details
EPS came in at -$0.33. The 21 earnings estimates compiled by S&P Capital IQ averaged -$0.30 per share. GAAP EPS were -$10.14 for Q2 compared to -$0.34 per share for the prior-year quarter.

Source: S&P Capital IQ. Quarterly periods. Non-GAAP figures may vary to maintain comparability with estimates.

Margin details
For the quarter, gross margin was 11.3%, 1,710 basis points worse than the prior-year quarter. Operating margin was -5.6%, 1,930 basis points worse than the prior-year quarter. Net margin was -120.9%, 11,750 basis points worse than the prior-year quarter.

Looking ahead
Next quarter's average estimate for revenue is $1.80 billion. On the bottom line, the average EPS estimate is -$0.24.

Next year's average estimate for revenue is $7.33 billion. The average EPS estimate is -$1.07.

Investor sentiment
The stock has a three-star rating (out of five) at Motley Fool CAPS, with 865 members out of 922 rating the stock outperform, and 57 members rating it underperform. Among 167 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 150 give Alpha Natural Resources a green thumbs-up, and 17 give it a red thumbs-down.

Of Wall Street recommendations tracked by S&P Capital IQ, the average opinion on Alpha Natural Resources is outperform, with an average price target of $18.77.