Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Zynga (ZNGA) upgraded to Neutral from Underperform at BofA/Merrill with analyst Justin Post citing stronger engagement that is driving bookings growth. 2. Hess Corp. (HES) upgraded to Outperform from Market Perform at Wells Fargo citing what it sees as Hess' "growth potential, strong operating cost performance, balance sheet strength, exploration upside and current discounted valuation." Wells expects the company to grow at a compound annual rate of 4.9% through 2019. 3. CF Industries (CF) upgraded to Buy from Neutral at UBS with analyst John Roberts saying the stock is a top pick on the eventual agricultural recovery. Limited nitrogen capacity coming post 2017 and the dividend yield position the stock for upside, Roberts tells investors in a research note. The analyst keeps a $33 price target for the shares. 4. TreeHouse (THS) upgraded to Overweight from Equal Weight at Stephens. 5. Scripps Networks (SNI) upgraded to Overweight from Neutral at JPMorgan with analyst Alexia Quadrani citing the 10% pullback in the shares over the past month. The analyst notes Scripps offered "strong commentary" on ad revenue and is now included in Hulu Live. She keeps an $83 price target for 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.