71 transactions on file (0 open-market purchases and 4 open-market sales on this page).
| Date | Insider | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-08-31 | Lyon Shawn M SVP Log & Storage, MPLX GP LLC Open-market sale | Open-market sale | −1,000 | $375.75 | −375.75K | 11,194 |
| 2026-08-28 | Lyon Shawn M SVP Log & Storage, MPLX GP LLC Open-market sale | Open-market sale | −425 | $368.51 | −156.62K | 12,194 |
| 2026-08-27 | Brzezinski Erin M VP and Controller Open-market sale | Open-market sale | −570 | $362.79 | −206.79K | 1,576 |
| 2026-08-17 | Benson Molly R Chief Legal Ofc & Corp Sec Option exercise | Option exercise | +7,196 | $47.73 | +343.47K | 37,530.3328 |
| 2026-08-17 | Benson Molly R Chief Legal Ofc & Corp Sec Open-market sale | Open-market sale | −7,196 | $358.57 | −2.58M | 30,334.3328 |
66 more transactions are on Measure
The assistant answers from what MPC has actually filed: 17 annual reports filed with the SEC, 71 Form 4 filings from the last year, 13F positions from the 2 tracked investors who hold it and 6 funds that hold it. Every figure in a reply links to the filing it came from, so an answer can be checked rather than believed.
Pressing one answers it here, from MPC's filings and figures. One a day without an account; a free account has its own, and no card.
See every Form 4 MPC insiders have filed, not the latest few.
Ten seconds, no card, and nothing to cancel.
Source
From SEC Form 4 filings, filed by officers, directors and 10%-owners within two business days of a transaction. “Indirect” holdings (a trust, an LLC, a family member) are included and not distinguished from direct ones in this table.
Past transactions say nothing about future ones, and none of this is investment advice.
See who bought, not who was handed shares
Every Form 4 MPC insiders file, not just the latest handful, with vesting and tax withholding struck out so what's left reads as a decision.
Every filingMeasure
Follow the investors who hold it
Each stake priced at the quarter it was filed, and diffed against the quarter before: who added, who trimmed, who left.
Every position they holdMeasure
Ask what a run of filings adds up to
Whether this is one decision or a pattern, and how it compares with MPC's own history of insider activity.
Free, no card, and it does not expire.