Seven Insiders’ Transactions At Dexcom, Inc. (DXCM): Richard Doubleday, John Lister, Jess Roper, Kevin Sayer, Robert Steven Pacelli, Jeffrey Moy, And Andrew Balo Sell And Acquire Stock.By Isabel RollandiSeptember 15, 2014 Seven insiders at DexCom, Inc. (NASDAQ:DXCM) have recently performed transactions at the company. Richard Doubleday, Sr. Vp. Worldwide Sales at DexCom,…