Marathon Petroleum director granted 727.742 shares

Marathon Petroleum Corp director Frank M. Semple received an annual 2026 equity retainer award of 727.742 shares of Common Stock.

Rhea-AI Filing Summary

Marathon Petroleum Corp director Frank M. Semple received an annual 2026 equity retainer award of 727.742 shares of Common Stock. The shares were granted at a stated price of $0.00 per share as non-cash compensation. Following this award, he directly owns 14,719.680 shares.

The total includes 282.886 shares previously acquired through dividend reinvestment that had not been reported earlier under Rule 16a-11, indicating part of his stake has accumulated automatically via reinvested dividends rather than open-market purchases.

Insider Trade Summary

Grant/Award: 727.742 shares

Grant/Award 1 txn

Insider SEMPLE FRANK M

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	727.742	$0.00	$0.00

Holdings After Transaction: Common Stock — 14,719.68 shares (Direct)

Footnotes (2)

1. F1. Represents the reporting person's annual 2026 equity retainer award.
2. F2. Includes 282.886 shares acquired pursuant to dividend reinvestment and not previously reported pursuant to Rule 16a-11.

Key Figures

Equity retainer award: 727.742 shares Post-transaction holdings: 14,719.680 shares Dividend reinvestment shares: 282.886 shares +1 more

4 metrics

Equity retainer award 727.742 shares Annual 2026 equity retainer grant to director Frank M. Semple

Post-transaction holdings 14,719.680 shares Common Stock directly owned after the reported grant

Dividend reinvestment shares 282.886 shares Shares acquired via dividend reinvestment, not previously reported

Grant price $0.00 per share Stated price for the equity retainer award shares

Key Terms

equity retainer award, dividend reinvestment, Rule 16a-11

3 terms

equity retainer award financial

"Represents the reporting person's annual 2026 equity retainer award."

dividend reinvestment financial

"Includes 282.886 shares acquired pursuant to dividend reinvestment and not previously reported"

Dividend reinvestment is when the money earned from a company's profit sharing, called dividends, is automatically used to buy more shares of that company instead of being received as cash. This process helps investors grow their holdings over time without extra effort, much like using earned interest to buy more of a savings account. It encourages long-term investment growth by continuously increasing the amount of shares owned.

Rule 16a-11 regulatory

"not previously reported pursuant to Rule 16a-11."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Marathon Petroleum (MPC) report for Frank M. Semple?

Marathon Petroleum reported that director Frank M. Semple received a grant of 727.742 shares of Common Stock as his annual 2026 equity retainer award. This is a non-cash compensation transaction, not an open-market purchase or sale of shares by the director.

How many Marathon Petroleum (MPC) shares does Frank M. Semple hold after this Form 4?

After the equity retainer grant, Frank M. Semple directly holds 14,719.680 shares of Marathon Petroleum Common Stock. This post-transaction figure includes prior holdings as well as shares accumulated through dividend reinvestment and the newly granted 727.742-share award reported in this filing.

Was the 727.742-share MPC transaction a market purchase by Frank M. Semple?

No. The 727.742 shares reported were granted to Frank M. Semple as his 2026 annual equity retainer award at a stated price of $0.00 per share. This reflects stock-based compensation, not an open-market purchase executed at prevailing market prices.

What does the dividend reinvestment disclosure mean in this MPC Form 4?

The filing notes that 282.886 shares were acquired through dividend reinvestment and not previously reported under Rule 16a-11. This means some of Semple’s holdings accumulated automatically when cash dividends were reinvested into additional shares instead of being paid out in cash.

Who is the insider involved in this Marathon Petroleum (MPC) Form 4 filing?

The insider is Frank M. Semple, identified as a director of Marathon Petroleum Corp. The Form 4 reports his receipt of an annual 2026 equity retainer award in the form of Common Stock and updates his direct ownership position following the grant and dividend reinvestment.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/04/2026 - 04:56 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

SEMPLE FRANK M

(Last) (First) (Middle)

C/O MARATHON PETROLEUM CORPORATION

539 S. MAIN STREET

(Street)

FINDLAY OHIO 45840

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Marathon Petroleum Corp [ MPC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/30/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	04/30/2026		A		727.742(1)	A	$0	14,719.68(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents the reporting person's annual 2026 equity retainer award.

2. Includes 282.886 shares acquired pursuant to dividend reinvestment and not previously reported pursuant to Rule 16a-11.

	/s/ Molly R. Benson, Attorney-in-Fact for Frank M. Semple	05/04/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)