2. Mark Loughridge
2. Mark Loughridge
Position: Chief financial officer

Currently: CFO, IBM Corp.

Loughridge, 58, deserves kudos for helping IBM communicate to investors its complex transition from hardware to services and software, but he's also a savvy operator: He centralized IBM's various accounting fiefdoms and shifted some 70% of his staff into "non-transactional" work, such as analysis for business units. He's the epitome of a team player, deferring to former CEO Sam Palmisano and current chief Ginni Rometty and letting the numbers speak for themselves: Since he became CFO in 2004, IBM's stock is up 114% and earnings have doubled.

--Scott Cendrowski

@FortuneMagazine - Last updated July 26 2012: 5:38 AM ET
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