Duke Energy (NYSE: DUK) reported earnings on May 3. Here are the numbers you need to know.

The 10-second takeaway
For the quarter ended March 31 (Q1), Duke Energy met expectations on revenues and missed estimates on earnings per share.

Compared to the prior-year quarter, revenue increased significantly. Non-GAAP earnings per share contracted. GAAP earnings per share grew significantly.

Gross margins contracted, operating margins shrank, net margins grew.

Revenue details
Duke Energy booked revenue of $5.90 billion. The four analysts polled by S&P Capital IQ expected a top line of $5.90 billion on the same basis. GAAP reported sales were 66% higher than the prior-year quarter's $3.55 billion.

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 $1.02. The 15 earnings estimates compiled by S&P Capital IQ averaged $1.04 per share. Non-GAAP EPS of $1.02 for Q1 were 11% lower than the prior-year quarter's $1.14 per share. GAAP EPS of $0.89 for Q1 were 35% higher than the prior-year quarter's $0.66 per share.

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 37.6%, 620 basis points worse than the prior-year quarter. Operating margin was 20.6%, 460 basis points worse than the prior-year quarter. Net margin was 10.7%, 240 basis points better than the prior-year quarter. (Margins calculated in GAAP terms.)

Looking ahead
Next quarter's average estimate for revenue is $5.68 billion. On the bottom line, the average EPS estimate is $0.98.

Next year's average estimate for revenue is $24.99 billion. The average EPS estimate is $4.34.

Investor sentiment
The stock has a four-star rating (out of five) at Motley Fool CAPS, with 1,866 members out of 1,958 rating the stock outperform, and 92 members rating it underperform. Among 499 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 482 give Duke Energy a green thumbs-up, and 17 give it a red thumbs-down.

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