Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Dunkin' Brands (DNKN) downgraded to Sell from Neutral at Goldman with analyst Karen Holthouse saying with the stock trading at the high end of its valuation range, comp and unit growth risks in the U.S. present downside risk. 2. Darden (DRI) downgraded to Neutral from Buy at BTIG with analyst Peter Saleh saying he does not expect the acquisition to start meaningfully contributing to sales and restaurant profit growth until fiscal 2019/2020 and sees limited upside at current levels. 3. Cempra (CEMP) downgraded to Sell from Hold at Gabelli with analyst Kevin Kedra saying the company is exploring strategic options but expects valuation to diminish along with the company's balance sheet over time and sees little reason to own shares without a catalyst. 4. PPL Corp. (PPL) downgraded to Neutral from Buy at UBS. 5. Panera Bread (PNRA) downgraded to Hold from Buy at Maxim with analyst Stephen Anderson saying he now sees the stock reflecting the positives of continued momentum from "Panera 2.0," opportunities for margin expansion, unit development, and share buybacks following its 25% year-to-date advance. He keeps a $260 price target on Panera 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.