9. Rex Tillerson
bpoy rex tillerson

Chairman and CEO, Exxon Mobil

Tillerson claimed earlier this year that natural gas producers -- Exxon (XOM, Fortune 500) is the U.S.'s largest -- were "losing our shirts" due to the commodity's depressed prices. But Exxon, No. 1 on the Fortune 500, has alternatives: the company has been shifting rigs to oil fields and bolstering its financial performance (and outlook) with key acquisitions and divestitures. It doubled its stake in North Dakota's booming Bakken shale, invested in methane gas production in Australia, and formalized a partnership with Russian oil giant OAO Rosneft that will grant the company access to the untapped Russian Arctic. --Erika Fry


- Last updated November 30 2012 05:12 PM ET
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