A former senior executive at Qualcomm Inc. made nearly $250,000 in illegal profits from using inside information to buy stock in the wireless technology company and an acquisition target before major public announcements, according to an indictment unsealed Monday. Jing Wang was charged with insider trading, money laundering, conspiracy, obstruction of official proceedings and aggravated identity theft. He voluntarily surrendered at FBI offices Monday and pleaded not guilty at an initial court appearance.