Marathon Petroleum exec sells 1,425 shares
Marathon Petroleum Corp (MPC) reported that Shawn M. Lyon, Senior Vice President, Logistics and Storage of MPLX GP LLC (a subsidiary of Marathon Petroleum), sold common stock in two transactions.
Rhea-AI Filing Summary
Marathon Petroleum Corp (MPC) reported that Shawn M. Lyon, Senior Vice President, Logistics and Storage of MPLX GP LLC (a subsidiary of Marathon Petroleum), sold common stock in two transactions. On August 31, 2026, he sold 1,000 shares at $375.75 per share in an open-market or private transaction. On August 28, 2026, he sold 425 shares at a weighted average price of $368.51 per share, with individual sale prices ranging from $368.43 to $368.53. Following these transactions, an indirect holding of 2,938.762 shares is reported as held by a 401(k) plan. The Rule 10b5-1 trading plan checkbox was not marked.
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Insights
Analyzing...
Insider Trade Summary
Net Seller: 1,425 shares
Net Sell
3 txns
Insider
Lyon Shawn M
Role
SVP Log & Storage, MPLX GP LLC
Sold
1,425 shs ($532K)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Sale | Common Stock | 1,000 | $375.75 | $376K |
| Sale | Common Stock F1 | 425 | $368.51 | $157K |
| holding | Common Stock | -- | -- | -- |
Holdings After Transaction:
Common Stock — 11,194 shares (Direct);
Common Stock — 2,938.762 shares (Indirect, By 401(k) Plan)
Footnotes (1)
- F1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $368.43 to $368.53. The reporting person undertakes to provide to Marathon Petroleum Corporation, any security holder of Marathon Petroleum Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote 1 to this Form 4.
Key Figures
Shares sold on 2026-08-31: 1,000 shares of Common Stock
Price per share on 2026-08-31: $375.75 per share
Shares sold on 2026-08-28: 425 shares of Common Stock
+3 more
6 metrics
Shares sold on 2026-08-31
1,000 shares of Common Stock
Open-market or private sale on August 31, 2026
Price per share on 2026-08-31
$375.75 per share
Sale of 1,000 shares on August 31, 2026
Shares sold on 2026-08-28
425 shares of Common Stock
Open-market or private sale on August 28, 2026
Weighted average price on 2026-08-28
$368.51 per share
Shares sold in multiple transactions from $368.43 to $368.53
Total shares sold
1,425 shares
Combined sales on August 28 and August 31, 2026
Indirect 401(k) holdings
2,938.762 shares of Common Stock
Indirect ownership by 401(k) Plan as of August 28, 2026
Key Terms
weighted average price, Rule 10b5-1 trading plan, indirect ownership, 401(k) Plan, +1 more
5 terms
weighted average price financial
"These shares were sold in multiple transactions at prices ranging from"
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
Rule 10b5-1 trading plan regulatory
"The filing’s Rule 10b5-1 checkbox is not marked, and there is no"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
indirect ownership financial
"An indirect holding of 2,938.762 shares is reported as held by a 401(k)"
401(k) Plan financial
"An indirect holding of 2,938.762 shares is reported as held by a 401(k)"
A 401(k) plan is a workplace retirement account that lets employees set aside part of their pay into a tax-advantaged savings pot, often with employers adding matching contributions — like a workplace piggy bank for future income. It matters to investors because the amount people save and how employers fund these plans influence consumer spending, corporate payroll costs and the flow of money into financial markets, which can affect stock prices and company valuations.
open-market or private transaction financial
"Sale in open market or private transaction"
FAQ
What insider transactions were reported for MPC on this Form 4?
The filing reports that Shawn M. Lyon sold 1,425 shares of Marathon Petroleum Corp common stock in two transactions, on August 28, 2026 and August 31, 2026, in open-market or private transactions.
Were the MPC insider sales under a Rule 10b5-1 trading plan?
No. The filing’s Rule 10b5-1 checkbox is not marked, and there is no footnote stating that these transactions were effected pursuant to a Rule 10b5-1 trading plan.
What is the role of the reporting person in relation to MPC?
The reporting person, Shawn M. Lyon, is the Senior Vice President, Logistics and Storage of MPLX GP LLC, which is a subsidiary of Marathon Petroleum Corp.
AI-generated analysis. How Rhea-AI works. Not financial advice.
