Marathon Petroleum (MPC) DEFA14A Additional proxy soliciting materials

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities

Exchange Act of 1934

Filed by the Registrant

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☐ Preliminary Proxy Statement

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☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material Pursuant to §240.14a-12

Marathon Petroleum Corporation

(Name of Registrant as Specified In Its Charter)

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*** Exercise Your Right to Vote ***

Important Notice Regarding the Availability of Proxy Materials for the

Shareholder Meeting to Be Held on April 25, 2018.

		Meeting Information
		Meeting Type:            Annual Meeting
	MARATHON PETROLEUM CORPORATION	For holders as of:      February 26, 2018
		Date:    April 25, 2018	Time: 10:00 AM Eastern Time
		Location:             Marathon Petroleum Corporation
		539 South Main  Street
		Findlay, OH  45840-3229

MARATHON PETROLEUM CORP.     539 SOUTH MAIN STREET     FINDLAY, OH 45840-3229	You are receiving this communication because you hold shares in the company named above.
	This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online atwww.proxyvote.com or easily request a paper copy (see reverse side).
	We encourage you to access and review all of the important information contained in the proxy materials before voting.
		See the reverse side of this notice to obtain proxy materials and voting instructions.

— Before You Vote —

How to Access the Proxy Materials

Proxy Materials Available to VIEW or RECEIVE:

NOTICE AND PROXY STATEMENT        ANNUAL REPORT

How to View Online:

Have the information that is printed in the box marked by the arrow   (located on the following page) and visit: www.proxyvote.com.

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— How To Vote —

Please Choose One of the Following Voting Methods

  Vote In Person:Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote shares held in registered form.   Vote By Internet:To vote now by the Internet, go towww.proxyvote.com.Have the information that is printed in the box marked by the arrow   (located on the following page) available and follow the instructions.   Vote By Mail:You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

             Voting Items            

  Your Board of Directors recommends you vote FOR the following Class I Directors for a three-year term expiring in 2021:   1.    Election of Class I Directors   Nominees:   1a.   Abdulaziz F. Alkhayyal   1b.   Donna A. James   1c.   James E. Rohr   Your Board of Directors recommends you vote FOR Items 2 and 3:   2.    Ratification of the selection of PricewaterhouseCoopers LLP as the company’s independent auditor for 2018.   3.    Approval, on an advisory basis, of the company’s named executive officer compensation.   Your Board of Directors recommends you vote EVERY YEAR “1 YEAR” for Item 4:   4.    Recommendation, on an advisory basis, of the frequency of advisory votes on the company’s named executive officer compensation.   Your Board of Directors recommends you vote FOR Items 5 and 6:   5.    Approval of amendments to the company’s Restated Certificate of Incorporation to eliminate the supermajority voting requirement applicable to bylaw amendments.   6.    Approval of amendments to the company’s Restated Certificate of Incorporation to eliminate the supermajority voting requirements applicable to certificate amendments and the removal of directors.   Your Board of Directors recommends you vote AGAINST Item 7:   7.    Shareholder proposal seeking alternative shareholder right to call a special meeting provision.