Shares of Merck & Co., Inc. MRK declined 4.4% after the company reported first-quarter 2021 adjusted earnings of $1.40 per share, missing the Zacks Consensus Estimate of $1.63 per share. The Kraft Heinz Company’s KHC shares gained 1.6% after the company announced first-quarter 2021 adjusted earnings of $0.72 per share, outpacing the Zacks Consensus Estimate of $0.60 per share. Shares of The Southern Company SO increased 1.3% after the company announced first-quarter 2021 earnings of $0.98 per share, beating the Zacks Consensus Estimate of $0.85 per share. Northrop Grumman Corporation NOC jumped 4.1% after the company reported first-quarter 2021 earnings of $6.57 per share, surpassing the Zacks Consensus Estimate of $5.48. 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 Northrop Grumman Corporation (NOC): Free Stock Analysis Report Southern Company The (SO): Free Stock Analysis Report Merck & Co., Inc. (MRK): Free Stock Analysis Report The Kraft Heinz Company (KHC): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research