Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Helmerich & Payne (HP) upgraded at RBC Capital, citing a strong balance sheet, high spec fleet, customer base, and low-cost advantage in both operations and newbuild construction. 2. Workday (WDAY) upgraded to Buy at JPMorgan by analyst Mark Murphy following the company's Q4 results. Murphy said that Workday seems to have "weathered the storm" as the business could be marking a turning point. 3. Signet Jewelers (SIG) upgraded to Buy at CL King, with analyst William Armstrong saying that sales trends will continue to outperform at fashion retailers. He also cites improving credit metrics, raised Zale integration synergy targets, and the recently approved $750M share repurchase authorization. 4. Starz (STRZA) upgraded to Buy at Evercore ISI by analyst David Joyce, who continues to expect growth in the service subscriber base and a halt to Encore service losses. 5. Holly Energy (HEP) upgraded to Buy at UBS with analyst Shneur Gershuni saying the company's plan to accelerate distribution growth and its Q4 results are not fully reflected in the shares. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.