Iron Mountain (NYSE: IRM) reported earnings on Oct. 31. Here are the numbers you need to know.

The 10-second takeaway
 For the quarter ended Sep. 30 (Q3), Iron Mountain missed estimates on revenues and missed estimates on earnings per share.

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

Gross margins shrank, operating margins dropped, net margins expanded.

Revenue details
 Iron Mountain reported revenue of $748.1 million. The nine analysts polled by S&P Capital IQ looked for net sales of $763.7 million on the same basis. GAAP reported sales were 3.1% lower than the prior-year quarter's $772.1 million.

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 $0.34. The 13 earnings estimates compiled by S&P Capital IQ predicted $0.35 per share. GAAP EPS of $0.31 for Q3 were 63% higher than the prior-year quarter's $0.19 per share. (The prior-year quarter included $0.02 per share in earnings from discontinued operations.)

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 58.5%, 90 basis points worse than the prior-year quarter. Operating margin was 20.4%, 170 basis points worse than the prior-year quarter. Net margin was 7.1%, 230 basis points better than the prior-year quarter.

Looking ahead
 Next quarter's average estimate for revenue is $748.2 million. On the bottom line, the average EPS estimate is $0.30.

Next year's average estimate for revenue is $3.01 billion. The average EPS estimate is $1.31.

Investor sentiment
 The stock has a four-star rating (out of five) at Motley Fool CAPS, with 279 members out of 304 rating the stock outperform, and 25 members rating it underperform. Among 116 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 106 give Iron Mountain a green thumbs-up, and 10 give it a red thumbs-down.

Of Wall Street recommendations tracked by S&P Capital IQ, the average opinion on Iron Mountain is outperform, with an average price target of $38.86.

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