HIGHER: Alexion Pharmaceuticals (ALXN), up 6% after the company earlier disclosed that it had “recently engaged in good faith with Elliott Advisors Limited, an affiliate of Elliott Management.” The activist investing firm recommended that the drugmaker “immediately launch a proactive sale process,” but Alexion said its board of directors had “unanimously decided that conducting a proactive sale process would not be in the best interest of shareholders and the patients we serve at this time”… Trade Desk (TTD), up 6% after Needham analyst Laura Martin upgraded the stock to Buy from Hold with a $325 price target. UP AFTER EARNINGS: Big Lots (BIG), up 6%… Genesco (GCO), up 15%… Ulta Beauty (ULTA), up 8%… DocuSign (DOCU), up 8%… Domo (DOMO), up 2%. DOWN AFTER EARNINGS: Zoom Video (ZM), down 7%… PagerDuty (PD), down 17%…Yext (YEXT), down 22%. ALSO LOWER: Ciena (CIEN), down 4% after UBS analyst Tejas Venkatesh downgraded shares to Sell from Neutral with a price target of $31, down from $43… Uber (UBER), down 1% after releasing its safety report that shares details on Uber’s safety progress, processes and data related to reports of the “most critical safety incidents” on its platform. As part of the report, Uber said that fatal physical assault was reported to occur in about 1 in every 122M U.S. trips.