Modeling Corporate Responsibility

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Our 130+ years of success in business is not accidental. We succeed because we adhere to core values that dictate how we do our important work.

What Good Citizenship Means to Us

In practice, the concept of corporate citizenship involves assessing all the potential ways that our actions impact others, both inside and outside our facilities. MPC's commitment to corporate citizenship means being accountable for our actions to a broad range of stakeholders – investors, employees, customers, suppliers, communities, business partners and others – who are impacted by how we operate.

We have a long-established set of core values that addresses health and safety, diversity and inclusion, integrity, corporate citizenship and environmental stewardship. 

See what we stand for

Marathon employees planting trees

Health and Safety

The well-being of our employees, contractors and neighboring communities is our highest priority.


Environmental Stewardship

Minimizing our environmental impact is a serious priority. Not only is it good business, it's the right thing to do.

See how we reduce our footprint

Political Engagement and Disclosure

We are committed to a strong refining and marketing industry and make voluntary disclosures of our public policy activity.


Corporate Citizenship

We are privileged to work in some wonderful communities. We want to do our part to preserve them and help them thrive.

See what we're up to

Diversity and Inclusion

Ultimately, we're all in this together. What we have learned is that our different backgrounds and cultures make us a stronger team.



Business ethics are held in the highest regard at MPC, which is why we enforce strict principles of corporate governance.

Read ABOUT INtegritY in action

Climate-Related Scenarios Planning

Our corporate value of environmental stewardship means we scrutinize everything we do to assess the impact on our immediate surroundings and the world at large while delivering the fuels that make modern life possible. This approach is evident in our annual publication Perspectives on Climate-Related Scenarios, which follows the recommendations of the Task Force on Climate-Related Financial Disclosures (TCFD). The report highlights how we’ve invested billions of dollars to reduce greenhouse gases and other emissions, to make our operations more energy efficient, and to adapt our business strategy to be more resilient.