Seaport Research downgraded Sphere Entertainment to Neutral from Buy. Published first on TheFly – the ultimate source for real-time, market-moving breaking financial news. Try Now>> See Insiders’ Hot Stocks on TipRanks >> Read More on SPHR: Fly Insider: Sphere, Alaska Air among week’s notable insider trades Insider Trading: Sphere’s (NYSE:SPHR) CEO Buys Stock Worth $3M