Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Stratasys (SSYS) downgraded to Neutral from Overweight at Piper Jaffray with analyst Troy Jenson saying his first quarter survey results were "disappointing" indicating system demand was challenging. 2. Hess Corp. (HES) downgraded to Neutral from Outperform at Macquarie and to Hold from Buy at KLR Group. 3. Citrix (CTXS) downgraded to Hold from Buy at Berenberg with analyst Josep Bori saying Citrix Systems delivered a strong quarter and its business model transition is well on track. He expects consensus upgrades, but notes the stock is up more than 20% since his initiation. The analyst sees limited upside to his new price target. 4. Trivago (TRVG) downgraded to Hold from Buy at Deutsche Bank with analyst Lloyd Walmsley saying he finds it harder to reassess the relevance of Trivago's business following Q1 results. 5. Aqua America (WTR) downgraded to Neutral from Outperform at Boenning & Scattergood with analyst Ryan Connors citing increasing regulatory headwinds in Pennsylvania, which accounts for over 60% of the company's business. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.