Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Viacom (VIAB) upgraded to Sector Perform from Underperform at RBC Capital with analyst Steven Cahall saying coming management changes removes an overhang but earnings risk and strategic unknowns constrain a potential bull-case turnaround. 2. Starz (STRZA) upgraded to Outperform from Neutral at Macquarie with analyst Amy Yong arguing that she expects shares to uncouple given strengthening fundamentals as Originals show further signs of success, a bottoming multiple, and M&A optionality. 3. Philip Morris (PM) upgraded to Overweight from Neutral at JPMorgan with analyst Alberto Lopez Rueda saying progress of Novel Nicotine Products will improve industry fundamentals. 4. KLX Inc. (KLXI) upgraded to Overweight from Sector Weight at KeyBanc with the firm citing valuation and its greater confidence in the company's earnings growth. 5. MTS Systems (MTSC) upgraded to Overweight from Equal Weight at Stephens. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.