Gartner, Inc.IT reported better-than-expected first-quarter 2021 results, wherein the company’s earnings and revenues surpassed the Zacks Consensus Estimate.Adjusted earnings per share of $2.00 beat the consensus mark by 90.5% and increased 66.7% year over year. Revenues of $1.10 billion beat the consensus estimate by 5.4% and improved 8.4% year over year on a reported basis and 5.7% on a foreign currency-neutral basis.Total contract value was $3.7 billion, up 5.8% year over year on a foreign currency-neutral basis.So far this year, shares of Gartner have gained 23.2%, outperforming the 11.4% growth of the industry it belongs to and 12.2% increase of the Zacks S&P 500 composite.Quarterly Numbers in DetailRevenues at the Research segment increased 7.7% year over year on a reported basis and 5.3% on a foreign currency-neutral basis, to $980 million. Gross contribution margin was 73.9% in the reported quarter.Revenues at the Conferences segment improved 78.8% year over year on a reported basis and 68.5% on a foreign currency-neutral basis, to $25 million. Gross contribution margin was 56% in the reported quarter.Revenues at the Consulting segment grew 3.9% year over year on a reported basis and remained flat on a foreign currency-neutral basis, at $100 million. Gross contribution margin was 39.3% in the reported quarter.Adjusted EBITDA of $320 million improved 50% year over year on a reported basis and 44.2% on a foreign currency-neutral basis.Gartner, Inc. Price, Consensus and EPS Surprise Gartner, Inc. price-consensus-eps-surprise-chart | Gartner, Inc. QuoteOperating cash flow totaled $157 million and free cash flow was $145 million in the reported quarter. Capital expenditures totaled $13 million.The company repurchased 2.3 million common shares for $398 million during the reported quarter. Further, its board of directors raised the share repurchase authorization by $500 million in April 2021.2021 ViewGartner raised its full-year 2021 guidance. The company now expects total revenues to be $4.51 billion compared with the prior guidance of $4.37 billion. The current Zacks Consensus Estimate of $4.44 billion lies below the updated guidance.Adjusted EPS is now anticipated to be $6.25 compared with the prior guidance of $4.10. The current Zacks Consensus Estimate of $4.15 lies below the updated guidance.Adjusted EBITDA is now projected to be $1 billion compared with the prior guidance of $760 million. Free cash flow is now anticipated to be $850 million compared with the prior guidance of $630 million.Currently, Gartner carries a Zacks Rank #3 (Hold). You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here.Performance of Other Business Services CompaniesEquifax’s EFX first-quarter 2021 adjusted earnings of $1.97 per share beat the Zacks Consensus Estimate by 29.6% and improved on a year-over-year basis. Revenues of $1.21 billion outpaced the consensus estimate by 7.9% and improved 26.6% year over year on a reported basis as well as on a local-currency basis.Robert Half’s RHI first-quarter 2021 earnings of 98 cents per share beat the consensus mark by 22.5% and were up 24.1% year over year. Revenues of $1.4 billion surpassed the consensus mark by 3.3% but declined 7.2% year over year on a reported basis and 7.6% on an adjusted basis.Omnicom’s OMC first-quarter 2021 adjusted earnings of $1.33 per share beat the consensus mark by 16.7% and increased 11.8% year over year. Total revenues of $3.4 billion surpassed the consensus estimate by 3.6% and increased marginally year over year.More Stock News: This Is Bigger than the iPhone!It could become the mother of all technological revolutions. Apple sold a mere 1 billion iPhones in 10 years but a new breakthrough is expected to generate more than 77 billion devices by 2025, creating a $1.3 trillion market.Zacks has just released a Special Report that spotlights this fast-emerging phenomenon and 4 tickers for taking advantage of it. If you don't buy now, you may kick yourself in 2022.Click here for the 4 trades >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Equifax, Inc. (EFX): Free Stock Analysis Report Omnicom Group Inc. (OMC): Free Stock Analysis Report Gartner, Inc. (IT): Free Stock Analysis Report Robert Half International Inc. (RHI): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research