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Corporate Profile

Marathon Oil Corporate (NYSE: MRO) is engaged in worldwide exploration, production and marketing of liquid hydrocarbons and natural gas; oil sands mining and bitumen upgrading in Canada; domestic refining, marketing and transportation of crude oil and petroleum products; and worldwide marketing and transportation of products manufactured from natural gas, such as liquefied natural gas and methanol.

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Contact Information

Investor Relations (For investor inquiries) Howard J. Thill Vice President Investor Relations and Public Affairs P.O. Box 3128 Houston, TX 77253-3128 phone: 713-296-4140 email: hjthill@marathonoil.com Chris C. Phillips Manager, Investor Relations phone: 713-296-3213 email: ccphillips@marathonoil.com

Corporate Headquarters Marathon Oil Corporation 5555 San Felipe Road Houston, TX 77056-2723 Principal Stock Transfer Agent National City Bank Shareholder Services Operations P.O. Box 92301 Cleveland, OH 44101-4301 phone: 888-843-5542 fax: 216-257-8508 email: shareholder.inquiries@nationalcity.com Independent Registered Public Accounting Firm PricewaterhouseCoopers LLP 1201 Louisiana Suite 2900 Houston, TX 77002-5678 phone: 713-356-4000 fax: 713-356-4717

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