Investor Presentaiton

-10- Roadmap to Creating Superior Value - Midstream M MARATHON Capture Full Midstream Value Chain Enhance Cash Flow Stability Grow in Premier Basins Leverage MPC Relationship Financial Discipline Participate across value chain to diversify business and enhance margins Alleviate in-basin bottlenecks Connect supply to global demand markets Long-haul pipelines to add further stable cash flow Export facilities meet significant, growing market needs Leverage existing assets for incremental third- party business Permian: significant growth opportunities across all hydrocarbons Marcellus: disciplined growth to support key producers Fosters further growth opportunities Enhances projects via volume commitments Provide logistics solutions to MPC's nationwide refining footprint Self-funding equity portion of capital investments Target mid-teen returns on growth investments Maintain investment grade credit profile 33

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