Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Grainger (GWW) upgraded to Outperform from Neutral at Baird with analyst David Manthey saying its strategic initiatives are gaining traction faster than expected. 2. Carter's (CRI) upgraded to Outperform from Market Perform at Wells Fargo with analyst Ike Boruchow saying his store work and industry reads give him confidence that Carter's comps should come in above plan. 3. CenturyLink (CTL) upgraded to Outperform from Sector Perform at RBC Capital with analyst Jonathan Atkin saying there is potential upside to the company's synergy targets, adding that he believes the new management can restructure operations to generate EBITDA growth. 4. Lowe's (LOW), Dick's Sporting (DKS), and Michaels (MIK) were upgraded to Outperform from Market Perform at Telsey Advisory. 5. Varian Medical (VAR) upgraded to Outperform from Market Perform at Barrington with analyst Michael Petusky saying he views the company's first quarter results as "strong" and believes the outlook for 2018 is likely conservative. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.