Omnicom Group Inc. OMC reported solid first-quarter 2020 results, wherein the company’s earnings and revenues surpassed the respective Zacks Consensus Estimate.Adjusted earnings of $1.19 per share beat the consensus mark by 7.21% and increased 1.7% on a year-over-year basis.Total revenues of $3.4 billion beat the consensus estimate by 0.6% but decreased 1.8% year over year on a reported basis. This year-over-year decrease came in due to a negative foreign-exchange rate impact of 1.4% and a decline in acquisition revenues, net of disposition revenues of 0.7%, partially offset by organic revenue growth of 0.3%.Shares of Omnicom have depreciated 32.8%, over the past year, compared with the 44.9% decline of the industry it belongs to.Other Quarterly DetailsAcross fundamental disciplines, advertising edged down 0.1%, CRM Consumer Experience was down 1.3%, CRM Execution & Support declined 0.9%, Public Relations inched up 0.2% and Healthcare increased 9.6%, organically, year over year.Across regional markets, year-over-year organic growth was 1.7% in the United States, 3.7% in the United Kingdom, 2% in the Asia Pacific and 0.6% in the Other North America. The Euro Markets & Other Europe, Latin America and Middle East and Africa were down 2.3%, 5% and 28.4%, respectively.Operating profit in the first quarter came in at $420.2 million, down 2% year over year. Operating margin decreased to 12.3% from the year-ago quarter’s 12.4%.Omnicom currently carries a Zacks Rank #4 (Sell).You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here.Performance of Other Business Services CompaniesRobert Half International Inc. RHI reported first-quarter 2020 earnings of 79 cents per share that missed the Zacks Consensus Estimate by 2.5% and were down 15% year over year. Revenues of $1.51 billion marginally beat the consensus mark, and increased 3% year over year on a reported basis and 2% on an as-adjusted basis.Equifax Inc. EFX came up with first-quarter 2020 adjusted earnings of $1.40 per share that beat the consensus estimate by 8.5% and improved 16% on a year-over-year basis. Revenues of $957.9 million outpaced the consensus estimate by 4.2% and improved 13% year over year on a reported basis.The Interpublic Group of Companies, Inc. IPG delivered first-quarter 2020 adjusted earnings of 11 cents per share, beating the consensus mark by 22.2%, and being flat year over year. Net revenues of $1.97 billion outpaced the consensus estimate by 1.6% but decreased 16.5% on a year-over-year basis.The Hottest Tech Mega-Trend of AllLast year, it generated $24 billion in global revenues. By 2020, it's predicted to blast through the roof to $77.6 billion. Famed investor Mark Cuban says it will produce "the world's first trillionaires," but that should still leave plenty of money for regular investors who make the right trades early.See Zacks' 3 Best Stocks to Play This Trend >>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 Interpublic Group of Companies, Inc. (The) (IPG): Free Stock Analysis Report Robert Half International Inc. (RHI): Free Stock Analysis Report To read this article on Zacks.com click here.