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

The 10-second takeaway
For the quarter ended March 31 (Q1), ONEOK whiffed on revenue and earnings per share.

Compared to the prior-year quarter, revenue dropped and GAAP earnings per share contracted slightly.

Margins increased across the board.

Revenue details
ONEOK booked revenue of $3.41 billion. The five analysts polled by S&P Capital IQ expected a top line of $4.76 billion on the same basis. GAAP reported sales were 9.2% lower than the prior-year quarter's $3.76 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 $1.16. The 11 earnings estimates compiled by S&P Capital IQ predicted $1.34 per share. GAAP EPS of $1.16 for Q1 were 2.5% lower than the prior-year quarter's $1.19 per share. (The prior-year quarter included $0.01 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 13.2%, 160 basis points better than the prior-year quarter. Operating margin was 9.8%, 110 basis points better than the prior-year quarter. Net margin was 3.6%, 10 basis points better than the prior-year quarter.

Looking ahead
Next quarter's average estimate for revenue is $3.80 billion. On the bottom line, the average EPS estimate is $0.69.

Next year's average estimate for revenue is $14.22 billion. The average EPS estimate is $3.56.

Investor sentiment
The stock has a four-star rating (out of five) at Motley Fool CAPS, with 413 members out of 425 rating the stock outperform, and 12 members rating it underperform. Among 139 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 134 give ONEOK a green thumbs-up, and five give it a red thumbs-down.

Of Wall Street recommendations tracked by S&P Capital IQ, the average opinion on ONEOK is outperform, with an average price target of $86.78.

Can your retirement portfolio provide you with enough income to last? You'll need more than ONEOK. Learn about crafting a smarter retirement plan in our free report: "The Shocking Can't-Miss Truth About Your Retirement." Click here for instant access to this free report.