General manager, IBM North America IBM 2010 rank: New Age: 48
The former infotech consultant last year took over the tech giantís North American division, which generates 40% of IBM's nearly $100 billion in revenue. Reporting to Ginni Rometty
(No. 7), van Kralingen also backs the companyís microfinance and mobile-banking ventures.
The list is compiled by FORTUNE editors, who consider four criteria: the size and importance of the womanís business in the global economy, the health and direction of the
business, the arc of the womanís career (resume and runway ahead), and societal and cultural influence.