Marathon Petroleum (NYSE: MPC) officer plans 2,500-share stock sale

Rhea-AI Filing Summary

Marathon Petroleum Corp (MPC) disclosed that officer Shawn M. Lyon filed a notice to sell up to 2,500 common shares of MPC under Rule 144. The proposed sale, through Wells Fargo Clearing Services on the NYSE, has an aggregate market value of approximately $874,974.97 and is planned around 08/13/2026. The shares derive from compensation awards dated 03/01/2024 (1,608 shares) and 03/01/2025 (892 shares).

Key Figures

Shares proposed for sale: 2,500 shares Aggregate market value: $874,974.97 Proposed sale date: 08/13/2026 +2 more

5 metrics

Shares proposed for sale 2,500 shares Common stock covered by the Form 144 notice

Aggregate market value $874,974.97 Estimated value of 2,500 MPC common shares to be sold

Proposed sale date 08/13/2026 Date associated with the planned NYSE sale

Compensation shares 2024 grant 1,608 shares Common stock from compensation dated 03/01/2024

Compensation shares 2025 grant 892 shares Common stock from compensation dated 03/01/2025

Key Terms

Rule 144, Form 144, aggregate market value, compensation

4 terms

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.

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.

aggregate market value financial

"2500 | 874974.97 | 280824763 | 08/13/2026"

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 | 03/01/2024 | Compensation | Issuer"

FAQ

What is Form 144 filed for MPC by Shawn M. Lyon?

Officer Shawn M. Lyon filed Form 144 to propose the sale of 2,500 Marathon Petroleum (MPC) common shares under Rule 144. The shares come from compensation awards granted in 2024 and 2025.

How many MPC shares are planned to be sold under this Form 144?

The notice covers a proposed sale of 2,500 MPC common shares. These consist of 1,608 shares from March 1, 2024 compensation and 892 shares from March 1, 2025 compensation awards.

What is the estimated value of the MPC shares in this Form 144?

The 2,500 MPC shares covered by the notice have an aggregate market value of $874,974.97. This figure reflects the value used in the Form 144 for the proposed Rule 144 sale.

When is the proposed sale date for the MPC shares under this Form 144?

The planned sale date referenced is 08/13/2026. This date indicates when the selling broker, Wells Fargo Clearing Services, may begin effecting the proposed sale of the MPC common shares.

What is the source of the MPC shares to be sold by Shawn M. Lyon?

All 2,500 MPC shares come from compensation awards issued by the company. Specifically, 1,608 shares are from compensation dated March 1, 2024, and 892 shares from compensation dated March 1, 2025.

On which exchange are the MPC shares in this Form 144 intended to be sold?

The shares in this Form 144 are identified for sale on the NYSE. Wells Fargo Clearing Services is listed as the broker handling the proposed transaction for the 2,500 MPC common shares.

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

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Available on EDGAR 08/20/2026 - 10:36 AM Accepted by SEC EDGAR 08/20/2026 - 10:35 AM 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 One North Jefferson Avenue St. Louis MO 63103	2500	874974.97	280824763	08/13/2026	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	03/01/2024	Compensation	Issuer			1608	03/01/2024	N/A
Common	03/01/2025	Compensation	Issuer			892	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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	08/20/2026
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)