In June, Samsung tapped Kwon, head of the company's components business, to run its $149 billion electronics empire. Under Kwon, the Korean company became the second-largest chipmaker in the world (Intel is No. 1). Now the new CEO has to contend with its top customer and competitor -- Apple. --Michal Lev-Ram
He's a pro-customer, tightfisted risk-taker who is conditioning Wall Street to embrace his erratic earnings. If you're running a business with high margins - watch out.