Brian O'Keefe

Brian is a former Fortune editor.

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  • Wal-Mart plans to be an online juggernaut

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  • Actavis: The latest Fortune 500 company to “leave” the U.S. for tax reasons

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  • The 4 toughest environmental challenges in business

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  • Vitol built this state-of-the-art storage terminal in Cape Canaveral, Fla. Open since 2010, it supplies the nearby port, the Orlando airport, and gas stations across central Florida.

    The unseen hand that moves the world’s oil

    By Brian O'Keefe and Doris Burke

  • Can we reverse-engineer the brain?

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  • What the healthcare ruling means for tech

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  • Exxon Mobil CEO Rex Tillerson photographed in 2012

    Exxon’s big bet on shale gas (Fortune, 2012)

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  • Optimism in green tech, despite setbacks

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  • Larry Summers warns of “Financial Armageddon”

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  • What’s next for nuclear power: Nassim Nicholas Taleb

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  • Petrobras: The next oil colossus

    By Brian O'Keefe and Doris Burke
  • Maura SullivanLeadership

    The new warrior elite

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  • Lloyd, who was on Fortune’s cover in 2010, is now running Wal-Mart’s expansion into smaller stores.Leadership

    Battle-tested: from soldier to business leader

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  • Sullivan (left) and Mays have gone from selling mops at trade shows to starring in their own reality series.Features

    Secrets of the TV pitchmen

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  • CEO of Bridgewater, Ray Dalio outside of their Westport offices.Finance

    Inside the world’s biggest hedge fund

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