Marathon Petroleum officer plans 425-share sale

Marathon Petroleum Corp (MPC) received a Form 144 notice indicating that officer Shawn M. Lyon intends to sell up to 425 shares of Marathon Petroleum common stock through Wells Fargo Clearing Services on the NYSE.

Rhea-AI Filing Summary

Marathon Petroleum Corp (MPC) received a Form 144 notice indicating that officer Shawn M. Lyon intends to sell up to 425 shares of Marathon Petroleum common stock through Wells Fargo Clearing Services on the NYSE. The filing lists an aggregate market value of approximately $156,608.14 for these proposed sales.

The notice also reports that Lyon has sold 2,500 shares of Marathon Petroleum common stock over the past three months for proceeds of about $874,974.97. The shares to be sold were acquired as compensation from the issuer on 03/01/2025.

Key Figures

Shares proposed to be sold: 425 shares of common stock Aggregate market value of proposed sale: $156,608.14 Date of proposed sale: 08/28/2026 +3 more

6 metrics

Shares proposed to be sold 425 shares of common stock Maximum amount listed in the Securities Information section

Aggregate market value of proposed sale $156,608.14 Value associated with the 425 shares proposed for sale

Date of proposed sale 08/28/2026 Listed in the Securities Information section for the NYSE sale

Shares sold in past 3 months 2,500 shares of common stock Sale by Shawn M. Lyon on 08/13/2026

Proceeds from recent sale $874,974.97 Total for the 2,500 shares sold on 08/13/2026

Acquisition date of shares to be sold 03/01/2025 Shares acquired as compensation from the issuer

Key Terms

Form 144, Rule 144, aggregate market value, compensation

4 terms

Form 144 regulatory

"144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

aggregate market value financial

"Common | Wells Fargo Clearing Services ... | 425 | 156608.14"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

compensation financial

"Common | 03/01/2025 | Compensation | Issuer"

FAQ

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

What does this Form 144 filing mean for Marathon Petroleum Corp (MPC)?

The Form 144 reports that officer Shawn M. Lyon intends to sell up to 425 shares of Marathon Petroleum common stock under Rule 144, and that he sold 2,500 shares in the past three months. It is a disclosure of planned and recent insider share sales.

How many MPC shares does Shawn M. Lyon plan to sell under this Form 144?

Shawn M. Lyon plans to sell up to 425 shares of Marathon Petroleum Corp common stock, with an aggregate market value listed at about $156,608.14, to be sold through Wells Fargo Clearing Services on the NYSE.

What recent MPC share sales by Shawn M. Lyon are disclosed?

The filing discloses that on 08/13/2026, Shawn M. Lyon sold 2,500 shares of Marathon Petroleum common stock, for total proceeds of approximately $874,974.97, within the three-month period covered by the notice.

How and when were the MPC shares to be sold acquired by Shawn M. Lyon?

The shares to be sold were acquired on 03/01/2025 as compensation from the issuer, Marathon Petroleum Corp. This indicates they were received as part of his compensation rather than purchased on the open market.

Which broker is handling the proposed MPC share sale for Shawn M. Lyon?

The proposed sale of 425 shares of Marathon Petroleum common stock is listed as being through Wells Fargo Clearing Services, located at 1 N. Jefferson Ave., St. Louis, Missouri, with the securities to be sold on the NYSE.

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

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Available on EDGAR 08/28/2026 - 04:43 PM EDT Accepted by SEC EDGAR 08/28/2026 - 04:42 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001948454
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Marathon Petroleum Corp
SEC File Number	001-35054
Address of Issuer	539 SOUTH MAIN STREET FINDLAY OHIO 45840-3229
Phone	419-422-2121
Name of Person for Whose Account the Securities are To Be Sold	Lyon Shawn M
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Wells Fargo Clearing Services 1 N. Jefferson Ave. St. Louis MO 63103	425	156608.14	280824763	08/28/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	03/01/2025	Compensation	Issuer			425	03/01/2025	n/a

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Shawn M. Lyon 539 South Main Street Findlay OH 45840-3229	Common	08/13/2026	2500	874974.97

144: Remarks and Signature

Remarks
Date of Notice	08/28/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Shawn M. Lyon
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)