Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Transocean (RIG) upgraded to Neutral from Sell at Goldman Sachs with analyst Waqar Syed saying Transocean has enhanced the balance sheet over the past several months and now sees leveraged metrics to be relatively better than the peer group in the 2019/2020 time frame. 2. Ralph Lauren (RL) upgraded to Neutral from Underweight at Atlantic Equities. 3. Brink's (BCO) upgraded to Outperform from In-Line at Imperial Capital with analyst Jeff Kessler saying investors have "much to be bullish about" in the second half of 2017 following the company's "strong" first half results and recent acquisitions. 4. Novavax (NVAX) upgraded to Buy from Neutral at Ladenburg with analyst Kevin Degeeter saying he believes the company's NanoFlu could become a "potent vaccine" for prevention of seasonal influenza. 5. Esperion (ESPR) upgraded to Buy from Hold at Jefferies with analyst Michael Yee saying the shares are likely "to keep grinding higher and higher" following the "new de-risking data" for the triple combination. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.