Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. BlackBerry (BB) upgraded to Neutral from Underperform at BofA/Merrill with analyst Daniel Bartus citing his updated sum-of-the-parts valuation model which, suggest limited downside at the current 2.2-times enterprise value to expected 2021 sales multiple vs. peer average multiple above 3-times. 2. Parker-Hannifin (PH) upgraded to Hold from Underperform at Gordon Haskett. 3. Oneok (OKE) upgraded to Buy from Neutral at Goldman Sachs with analyst Michael Lapides saying his estimates for 2020-2022 are 5% above consensus on average. 4. Hollysys (HOLI) upgraded to Buy from Neutral at Goldman Sachs with analyst Jacqueline Du saying the stock has dropped 21% year-to-date following the company's proposed placement to invest in Industrial Internet of Things in May. 5. Marvell (MRVL) upgraded to Outperform from Market Perform at Wells Fargo with analyst Gary Mobley saying "we are at a 'tipping point' in adoption of Marvell's 5G system on chip and related Ethernet integrated circuits relative to 'expensive' field programmable gate arrays." This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.