Investor Presentaiton

Increasing Synergy Potential Synergy Outlook¹ ($ millions) 380 1,400 110 400 55 270 300 90 665 210 200 465 Refining & Marketing Retail Midstream Estimated Annual Run-Rate ($ millions) M MARATHON 1,400 450 1,000 290 600 120 1,000 950 710 480 Corporate Total YE2019 2 Initial Synergy Estimates' Updated Synergy Estimates YE2020 YE2021 Raising gross run-rate synergy potential by up to 40 percent to $1.4 billion 1 Procurement synergies allocated 50/50 to Refining & Marketing and Corporate 2 Initial synergy estimates provided April 30, 2018 11

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