Ameren (NYSE: AEE) reported earnings on May 2. Here are the numbers you need to know.

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

Compared to the prior-year quarter, revenue dropped. Non-GAAP earnings per share didn't move. GAAP loss per share contracted.

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

Revenue details
Ameren booked revenue of $1.48 billion. The two analysts polled by S&P Capital IQ hoped for sales of $1.63 billion on the same basis. GAAP reported sales were 8.6% lower than the prior-year quarter's $1.61 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 $0.22. The eight earnings estimates compiled by S&P Capital IQ anticipated $0.28 per share. Non-GAAP EPS of $0.22 were the same as the prior-year quarter. GAAP EPS were -$0.60 for Q1 versus -$1.66 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 32.7%, 10 basis points better than the prior-year quarter. Operating margin was 12.5%, 30 basis points worse than the prior-year quarter. Net margin was -9.8%, much better than the prior-year quarter. (Margins calculated in GAAP terms.)

Looking ahead
Next quarter's average estimate for revenue is $1.64 billion. On the bottom line, the average EPS estimate is $0.59.

Next year's average estimate for revenue is $6.60 billion. The average EPS estimate is $2.12.

Investor sentiment
The stock has a two-star rating (out of five) at Motley Fool CAPS, with 188 members out of 230 rating the stock outperform, and 42 members rating it underperform. Among 68 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 60 give Ameren a green thumbs-up, and eight give it a red thumbs-down.

Of Wall Street recommendations tracked by S&P Capital IQ, the average opinion on Ameren is hold, with an average price target of $33.80.

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Seth Jayson had no position in any company mentioned here at the time of publication. You can view his stock holdings here. He is co-advisor of Motley Fool Hidden Gems, which provides new small-cap ideas every month, backed by a real-money portfolio. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.