Marathon Oil Corporation Creates Value by Responsibly Producing Oil and Natural Gas Vital to Meeting Growing Global Energy Needs

Create, Grow, Sustain: BUSINESS ROUNDTABLE Celebrating Success 2014 SUSTAINABILITY REPORT

Marathon Oil Corporation creates value by responsibly producing oil and natural gas vital to meeting growing global energy needs. In doing so, we act responsibly toward our shareholders and business partners, support those who work for us, and strive to improve the communities where we operate. www.marathonoil.com/lov2012/index.shtml Our goal is to be recognized as the premier independent exploration and production company, and to accomplish this, we must successfully execute the strategic imperatives that guide our efforts. These imperatives begin with an uncompromising focus on our long-standing core values of health and safety, environmental stewardship, honesty and integrity, corporate citizenship, and a high-performance team culture. Our values help us protect our license to operate and drive business performance. We believe that developing oil To achieve sustainable and profitable growth, Marathon Oil is accelerating activity in our U.S. and gas resources in a safe, unconventional resource assets — the South Texas Eagle Ford Shale, North Dakota Bakken Shale and Oklahoma resource basins. These resource plays are at the forefront of the technology-driven environmentally sound and renaissance in the American oil and gas industry, which is making vast hydrocarbon resources available for the economic growth and energy security of our nation. responsible way is not only

We recognize that the same spirit of technological discovery and innovation that is driving the possible, but also vital to the renaissance in the oil and gas industry can and will drive our ability to develop these important energy resources with less impact on the environment. With a clear vision and sense of purpose, sustainability of Marathon we are building a sustainable business by addressing the social, environmental and economic Oil, the communities we call challenges that come with growth. We believe that developing oil and gas resources in a safe, environmentally sound and responsible way is not only possible, but also vital to the sustainability home, and our industry. of Marathon Oil, the communities we call home and our industry.

To illustrate our commitment to sustainability, in the Eagle Ford we are using hydraulic fracturing technologies that minimize water usage and allow us to optimize each well. We also continue to build midstream infrastructure to transport our production by pipeline. Both of these efforts reduce truck traffic and its effects on roads, public safety and air emissions. In addition, we plan to use nonfresh water for the majority of our water needs in the Eagle Ford during 2014.

These are just a few examples of ways we are working to create, grow and sustain our business by being a responsible operator, partner and neighbor.

Lee M. Tillman President and Chief Executive Officer