Stocks that traded heavily or had substantial price changes Thursday: Perrigo Co., up$ 3.83 to$ 47.33. The drug company reached a settlement over a tax dispute with the Irish government. Virgin Galactic Holdings Inc., up$ 2.74 to$ 25.30. The spaceflight company has been cleared to fly following a Federal Aviation Administration inquiry. CarMax Inc., down$ 18.49 to$ 127.96. The used car dealership chain's fiscal second-quarter profit fell short of Wall Street forecasts. Lordstown Motors Corp., up