Marathon Petroleum (MPC) insider buying and selling
Every Table I transaction reported by directors and officers of S&P 500 companies on SEC Form 4 filings (2 business days to file): each row labeled with its official transaction code, nothing filtered out beforehand.
Open-market purchases (code P) are the rare signal, in green; sales (code S) are common and often pre-scheduled (10b5-1). Table II (derivatives) is not included: its prices are exercise prices, not market values. Guide: insider buying.
| Date | Ticker | Insider | Role | Shares | Price | Amount | % of stake | Type / filing |
|---|
Download these transactions as CSV No account, no sign-up. The data is public: it comes from SEC Form 4 filings.
Marathon Petroleum Corporation (MPC) insider buying and selling: no purchases, 12 sales
50 Form 4 Table I transactions filed with the SEC by Marathon Petroleum Corporation insiders between 2025-12-16 and 2026-09-01 (15-month history): 0 open-market purchases and 12 sales, plus 38 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $6.2M by Benson Molly R on 2026-08-17.
Marathon Petroleum insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, Marathon Petroleum insiders filed 12 sales worth $13.9M on the open market, and no purchases.
The biggest seller was Benson Molly R (Chief Legal Ofc & Corp Sec): $6.2M in 1 sale, out of 5 different sellers.
The largest trade of the period was a sale of $6.2M on Aug 17, 2026, by Benson Molly R (Chief Legal Ofc & Corp Sec), under a 10b5-1 plan. Form 4 on sec.gov (0001193125-26-356892).
Of the 12 sales, 1 (8%, $6.2M) carries the 10b5-1 plan flag on the Form 4, meaning it was scheduled months ahead; the other 11 do not.
The last three months show 6 sales, against 2 in the three before. The latest sale from Aug 31, 2026.
Against its sector (Energy, 21 companies with an insider page on this site), over the same dates the median is 12 sales and 0 purchases on the open market. Marathon Petroleum has more sales than 9 of the other 20, ranks 10 of 21 by net dollars sold, and 8 of the 21 have at least one purchase.
The 20 most important trades
With no open-market purchases, the table starts with MPC's sales, largest first. The full history is in the tool above, already searched.
See all 50 MPC trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2026-08-17 | 2026-08-19 | Benson Molly R | Chief Legal Ofc & Corp Sec | $6.2M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF2 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 15, 2026. | SEC |
| 2026-08-12 | 2026-08-14 | Henschen Michael A Ii | Ex VP, Refining | $2.1M | S — Open-market sale | SEC |
| 2026-06-04 | 2026-06-08 | Henschen Michael A Ii | Ex VP, Refining | $1.7M | S — Open-market saleForm 4 footnoteF1 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $268.82 to $268.99, inclusive. 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. | SEC |
| 2026-02-12 | 2026-02-13 | Henschen Michael A Ii | Ex VP, Refining | $1.1M | S — Open-market sale | SEC |
| 2026-08-13 | 2026-08-17 | Lyon Shawn M | SVP Log & Storage, MPLX GP LLC | $875k | S — Open-market sale | SEC |
| 2026-03-11 | 2026-03-13 | Hessling Ricky D. | Chief Commercial Officer | $407k | S — Open-market saleForm 4 footnoteF1 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $224.51 to $224.52, inclusive. 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. | SEC |
| 2026-08-31 | 2026-09-01 | Lyon Shawn M | SVP Log & Storage, MPLX GP LLC | $376k | S — Open-market sale | SEC |
| 2026-03-13 | 2026-03-17 | Hessling Ricky D. | Chief Commercial Officer | $371k | S — Open-market sale | SEC |
| 2026-05-13 | 2026-05-15 | Hessling Ricky D. | Chief Commercial Officer | $250k | S — Open-market sale | SEC |
| 2026-03-12 | 2026-03-13 | Hessling Ricky D. | Chief Commercial Officer | $238k | S — Open-market sale | SEC |
| 2026-08-27 | 2026-08-31 | Brzezinski Erin M | VP and Controller | $207k | S — Open-market sale | SEC |
| 2026-08-28 | 2026-09-01 | Lyon Shawn M | SVP Log & Storage, MPLX GP LLC | $157k | S — Open-market saleForm 4 footnoteF1 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. | SEC |
| 2026-08-17 | 2026-08-19 | Benson Molly R | Chief Legal Ofc & Corp Sec | $821k | M — Option exercise (scheduled 10b5-1)Form 4 footnoteF1 Includes 0.177747 shares acquired pursuant to dividend reinvestment and not previously reported pursuant to Rule 16a-11. | SEC |
| 2026-03-02 | 2026-03-03 | Mannen Maryann T. | Chairman, President & CEO | $818k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-08-03 | 2026-08-04 | Mannen Maryann T. | Chairman, President & CEO | $283k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-06-04 | 2026-06-08 | Henschen Michael A Ii | Ex VP, Refining | $248k | M — Option exercise | SEC |
| 2026-03-02 | 2026-03-03 | Floerke Gregory Scott | Ex VP & COO, MPLX GP LLC | $166k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-03-02 | 2026-03-03 | Benson Molly R | Chief Legal Ofc & Corp Sec | $166k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-03-02 | 2026-03-03 | Hessling Ricky D. | Chief Commercial Officer | $162k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-03-02 | 2026-03-03 | Lyon Shawn M | SVP Log & Storage, MPLX GP LLC | $159k | F — Tax withholding (shares surrendered for taxes) | SEC |
The period balance: money in, money out
In the Form 4 filings submitted between Dec 16, 2025 and Sep 1, 2026 there is not one open-market purchase of Marathon Petroleum Corporation: 12 sales worth $13.9M and zero dollars bought.
Only codes P and S count, where an insider puts in or takes out their own money. A selling balance like Marathon Petroleum Corporation's is the norm in the S&P 500, where much of the pay comes as stock. It is not a recommendation to buy or sell: it is what was filed.
Every transaction, code by code
| Code | What it means | Trades | Reported amount |
|---|---|---|---|
| A | Grant or award | 19 | $0 |
| F | Tax withholding (shares surrendered for taxes) | 14 | $2.1M |
| S | Open-market sale | 12 | $13.9M |
| G | Gift | 3 | $0 |
| M | Option exercise | 2 | $1.1M |
| Total | Everything filed in the period | 50 | $17.0M |
22 of the 50 rows carry no usable amount on the Form 4: they count as trades and add $0. The code labels come from the SEC index.
Who has traded
Over the 15 months of history, 19 distinct people or entities have filed Marathon Petroleum Corporation transactions: none bought on the open market and 5 sold. Counted by CIK, the fixed number the SEC gives each filer, and not by name, which each filer types their own way.
| Filer | Role | Transactions | Bought (count) | Sold (count) | Last filed |
|---|---|---|---|---|---|
| Benson Molly R | Chief Legal Ofc & Corp Sec | 5 | — | $6.2M (1) | 2026-08-19 |
| Henschen Michael A Ii | Ex VP, Refining | 8 | — | $4.8M (3) | 2026-08-14 |
| Lyon Shawn M | SVP Log & Storage, MPLX GP LLC | 7 | — | $1.4M (3) | 2026-09-01 |
| Hessling Ricky D. | Chief Commercial Officer | 8 | — | $1.3M (4) | 2026-05-15 |
| Brzezinski Erin M | VP and Controller | 3 | — | $207k (1) | 2026-08-31 |
| Floerke Gregory Scott | Ex VP & COO, MPLX GP LLC | 3 | — | — | 2026-03-03 |
| Mannen Maryann T. | Chairman, President & CEO | 3 | — | — | 2026-08-04 |
| Khoury Maria A | Exec VP & Chief Fin Ofc | 2 | — | — | 2026-03-03 |
Shown here are the 8 who moved the most money, out of 19. The rest are in the full history, one link above. The name links to all their trades, in any company. "Transactions" counts any code; the money, open market only. Role: from their latest filing.
Month by month
By the month the trade was executed, not the month it was filed; months with no trades show zero. The busiest month was Aug 2026: 0 purchases and 6 sales, worth $9.8M. 10 of the 15 months have none.
| Month | Purchases | Amount | Sales | Amount |
|---|---|---|---|---|
| Aug 2025 | 0 | $0 | 0 | $0 |
| Sep 2025 | 0 | $0 | 0 | $0 |
| Oct 2025 | 0 | $0 | 0 | $0 |
| Nov 2025 | 0 | $0 | 0 | $0 |
| Dec 2025 | 0 | $0 | 0 | $0 |
| Jan 2026 | 0 | $0 | 0 | $0 |
| Feb 2026 | 0 | $0 | 1 | $1.1M |
| Mar 2026 | 0 | $0 | 3 | $1.0M |
| Apr 2026 | 0 | $0 | 0 | $0 |
| May 2026 | 0 | $0 | 1 | $250k |
| Jun 2026 | 0 | $0 | 1 | $1.7M |
| Jul 2026 | 0 | $0 | 0 | $0 |
| Aug 2026 | 0 | $0 | 6 | $9.8M |
| Sep 2026 | 0 | $0 | 0 | $0 |
| Oct 2026 | 0 | $0 | 0 | $0 |
The last month may be partial: a Form 4 is filed up to two business days later. The table does not say whether the pattern is good or bad; it says when it happened.
Marathon Petroleum Corporation (MPC) analysis page →
Other Energy companies with insider trades
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Which insiders are buying their own company stock →
How to read this data
1 of the 12 sales in the table are flagged as scheduled (10b5-1 plan): signed months ahead and executed automatically, so they say nothing about what the insider thinks today. Marathon Petroleum has no open-market purchase (code P) in the history, the most common case in the S&P 500: insiders are already paid in stock. The latest filing is from Sep 1, 2026, and a Form 4 arrives up to two business days after the trade.
5 of the 20 rows in the table carry footnotes from the Form 4 itself, folded into the code column and copied verbatim; a row with no footnote means the filing has none.
Guide: Insider buying · all guides
What is behind these trades
The concepts on this page, explained from scratch in the Academy. Free, no account.
- What the efficiency hypothesis says and what it does NOT sayIf an insider's purchase is public and anyone can read it, is there any information left in it? That is the exact question that brings people here.
- Who really moves the market: the types of investorWho sits on the other side of each order, and where a company's own insiders fit among them.
- Supply, demand and price: why it rises and falls constantlyHow a piece of news ends up inside the price, and why the reaction to a filed sale is rarely the one you would expect.
Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.