Wednesday, April 29, 2020

10 a.m. Eastern Daylight Time (EDT)

Auditorium

Marathon Petroleum Corporation539 South Main Street

Findlay, OH 45840

2020NOTICE OF ANNUAL MEETING

AND PROXY STATEMENT

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At MPC, we're proud of the things we do to

support the communities in which we live.

Our employees are making a diff erence. We are

building and maintaining wildlife habitats, being

advocates for diversity and inclusion, helping

communities rebuild after natural disasters,

supporting local science, technology, engineering

and math (STEM) programs and much more.

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Proxy Statement

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92% Independent

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12/12

6/12/

8/12/

12/12

7/127/12

4/124/12

12/12/

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2 Women

3 Ethnic Minorities

33% Diverse

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The Board met 14 times in 2019. Average director attendance at all Board andccoommmmiitttteeee mmeeeettiinnggss iinn 22001199 wwaass 9977%%.. EEaacchh ooff oouurr ddiirreeccttoorrss aatttteennddeedd aatt lleeaasstt7755%% ooff tthhee mmeeeettiinnggss ooff tthhee BBooaarrdd aanndd ccoommmmiitttteeeess oonn wwhhiicchh hhee oorr sshhee sseerrvveeddiinn 22001199..

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How the Board Conducts Its Business

CORPORATE GOVERNANCE

2020 Proxy Statement 15

Board Leadership StructureOur Corporate Governance Principles provide the Board with the flexibility to exercise its business judgment onbehalf of shareholders and choose the optimal leadership for the Board depending upon the Company’s particularneeds and circumstances at a given time. The independent members of the Board elect the Chairman and, as partof this election, review whether to combine or separate the positions of Chairman and CEO. When the Board haselected the CEO as Chairman, the independent directors have also elected a Lead Director from amongthemselves.

Throughout our history as a public company, the Board has selected the leadership structure it determined was bestat the time. From 2011, when we became a public company, to 2016, the Board was led by an independentChairman, because the Board determined that was the best leadership structure given the Company’scircumstances at that time. More recently, from 2016 and until the conclusion of the Annual Meeting, our currentCEO, Mr. Heminger, has served as Chairman. The Board believes Mr. Heminger has been in the best positionduring this time to lead the Board due to his unique and in-depth knowledge of the history and growth of ourCompany, coupled with his industry expertise in key areas of strategic importance to our business. Theseadjustments to leadership structure over time demonstrate the Board’s thoughtful approach in evaluating andimplementing the best leadership structure for the Board depending upon the Company’s circumstances at a giventime.

Role of the Lead Director

The Lead Director is an independent director, elected by the independent members of the Board. Mr. Rohr hasserved as the Board’s Lead Director since 2018.

The Lead Director has the following key authorities and responsibilities:

▶ Serving as the principal liaison between the Chairman/CEO and the independent directors.

▶ Consulting with the Chairman/CEO on and approving meeting agendas, schedules and information sent to theBoard.

▶ The authority to call meetings of the independent directors.

▶ Presiding over all meetings of the Board in the Chairman/CEO’s absence, including executive sessions.

▶ Providing leadership to the Board in any situation where the Chairman and CEO roles may be perceived to bein conflict.

▶ Directly communicating with significant shareholders, as appropriate.

Board Meetings and Attendance2019 Board and Committee

Meeting Attendance

Board Meetings and Attendance2019 Board and Committee

Meeting Attendance

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97%

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Proxy Statement

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-20%

-15%

-10%

-5%

0%

5%

10%

15%

20%

Q1 2019 Q2 2019 Q3 2019 Q4 2019

MPC Median of Performance Unit Peer Group S&P 500 Energy Index

-30%

-20%

-10%

0%

10%

20%

30%

40%

50%

60%

2015 2016 2017 2018 2019

MPC Median of Performance Unit Peer Group S&P 500 Energy Index

-25%

0%

25%

50%

75%

100%

125%

150%

175%

200%

225%

250%

2011 2012 2013 2014 2015 2016 2017 2018 2019

CEO Compensation MPC TSR

-30%

-20%

-10%

0%

10%

20%

30%

40%

-30%

-20%

-10%

0%

10%

20%

30%

40%

MPC Median of Performance Unit Peer Group S&P 500 Energy Index

MPC Median of Performance Unit Peer Group S&P 500 Energy Index

2017 2017 2018 2018 2019 2019

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GHG Intensity

SUSTAINABILITYMetric 20%

5%

Measures our ability to identify, understand and control process hazards.

5%

5%

5%

Marathon Safety Performance

Index

Designated Environmental

Incidents

Measures our success and commitment to employee safety. Goals are set annually at best-in-class industry performance, focusing on continual improvement and include common industry metrics.

Process Safety Events Rate

Measures environmental performance by tracking certain releases of hazardous substances into air, water or land; permit exceedances; government agency enforcement actions; and proper operation of emission monitoring equipment.

Measures how efficiently we operate our facilities and implement a business plan that promotes a lower carbon-intensive future. Based on Scope 1 & Scope 2 greenhouse gas (GHG) emissions divided by the manufacturing inputs processed at our petroleum refineries, renewable fuel refineries and natural gas processing and fractionation plants.

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Compensation Philosophy

Compensation Consultant

Peer Group & Market Data

CEO Input

Compensation Committee Decisions

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50th Percentile

Revenue

Market Capitalization

100th Percentile

100th Percentile

80th

45th

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From Toledo / Detroit – I-75 South toward Dayton – Take exit 157 for OH-12 toward Findlay / Columbus Grove – Turn left onto OH-12 East, West Main Cross St., 1.2 miles – Turn right onto South Main St. at Hancock County courthouse – Turn left onto Hardin St. Watch for visitor parking signs.

From Lima / Dayton – I-75 North toward Toledo – Take exit 157 for OH-12 toward Columbus Grove / Findlay – Turn right onto OH-12 East, West Main Cross St., 1.1 miles – Turn right onto South Main St. at Hancock County courthouse – Turn left onto Hardin St. Watch for visitor parking signs.

From Marion / Columbus – US-23 North – Slight right to stay on US-23 North – Continue onto OH-15 West – Take the US-68 ramp toward Kenton / South Main St. – Turn right onto South Main St. – Continue to follow South Main St. – Turn right onto Hardin St. Watch for visitor parking signs.

From Cleveland – I-90 West to OH-4 South. Take exit 110 from I-90 West – Continue on OH-4 South to Scipio Township – Follow US-224 West to Main St., turn left on Main St. – Turn left onto Hardin St. Watch for visitor parking signs.

N

Trenton Ave.

FINDLAYHIGH

SCHOOL

Hardin St.Lincoln St.

COURTHOUSE

HOSPITAL

FINDLAY AIRPORT

568

224

224

12

37

568

12

568

Bla

ncha

rd S

t.Blanchard Ave.

Mai

n St

.

E. Sandusky St.W. Sandusky St.

Tiffin Ave.

Sixth St.

Lima A

ve.

75

Osb

orneMain Cross St.

Fosto

ria Ave

.

Marathon PetroleumCorporation

75

75

15

68

To US-23 /OH-15 Columbus

Mai

n St

.

EXIT156

EXIT157

EXIT159

To Lima /Dayton

Township Rd. 99

To Toledo /Detroit

Visitor Parking Lot

539 South Main StreetFindlay, OH 45840

419-422-2121

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MARATHON PETROLEUM CORPORATION | 539 South Main St. | Findlay, OH 45840

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