Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Aramark (ARMK) downgraded to Neutral from Outperform at Baird with analyst Andrew Wittmann saying the shares rallied following its results, which helped balance the risk/reward. 2. Hostess Brands (TWNK) downgraded to Sector Perform from Outperform at RBC Capital and to Hold from Buy at SunTrust. 3. Spark Therapeutics (ONCE) downgraded to Market Perform from Outperform at BMO Capital with analyst Matthew Luchini saying he believes that the company's latest SPK-8011 hemA data falls short of expectations, with totality of the data suggesting a "less competitive profile versus valrox" and reducing his confidence in the program. 4. Mallinckrodt (MNK) downgraded to Market Perform from Outperform at Raymond James with analyst Elliot WIlbur saying pipeline optionality remains high and is heavily discounted by valuation, and sees no "rational valuation framework" to support further upside. 5. Dentsply Sirona (XRAY) downgraded to Equal Weight from Overweight at Stephens and to Equal Weight from Overweight at Morgan Stanley. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.