Date: Jan. 27, 2010

Acquired for: $7.4 Billion

Oracle CEO Larry Ellison is revered as the tech industry's most ruthless businessman. The world’s sixth richest man saw the opportunity to buyout his biggest competitor and spared no expense in doing so. Seven billion was enough to bring Sun Microsystem's over to the dark side. Need we remind you this all transpired during the Recession? In acquiring all of Sun's software and hardware product lines, Oracle has solidified its position as a powerhouse in both tech sectors.