Investigators have pieced together a case that alleges more than $25 million in illegal gains based on trading in 2006-09 on companies including Advanced Micro Devices (AMD, Fortune 500), Akamai (AKAM), Clearwire (CLWR), Google (GOOG, Fortune 500), Hilton, Polycom (PLCM) and Sun Microsystems (JAVA, Fortune 500), among others.