Shares of Slack Technologies, Inc. WORK jumped 37.6% after Salesforce.com reported that they are in talks to buy the business communications software company.Shares of BRP Inc. DOOO rose 3.3% after the company reported third-quarter fiscal 2021 earnings of $1.60 per share, surpassing the Zacks Consensus estimate of $1.01.Shares of WidePoint Corporation WYY surged 27.5% after the company announced a $500 million contract from the Department of Homeland Security.Shares of Renalytix AI plc RNLX jumped 31.7% after the company and Kantaro Biosciences’ joint venture received FDA Emergency Use Authorization for its COVID-SeroKlir antibody test kit.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 WidePoint Corporation (WYY): Free Stock Analysis Report BRP Inc. (DOOO): Free Stock Analysis Report Slack Technologies, Inc. (WORK): Free Stock Analysis Report Renalytix AI PLC Sponsored ADR (RNLX): Free Stock Analysis Report To read this article on Zacks.com click here.