60 transactions on file.
| Date | Insider | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-08-14 | Peiffer Garry L. Director Grant / award | Grant / award | +1,232.166 | $0.00 | +0 | 69,313.23 |
| 2026-08-14 | Walker Ray N JR Director Grant / award | Grant / award | +81.939 | $0.00 | +0 | 4,609.294 |
| 2026-08-14 | SURMA JOHN P Director Grant / award | Grant / award | +1,563.427 | $0.00 | +0 | 95,447.777 |
| 2026-08-14 | STICE J MICHAEL Director Grant / award | Grant / award | +982.715 | $0.00 | +0 | 58,412.913 |
| 2026-08-14 | SEMPLE FRANK M Director Grant / award | Grant / award | +1,072.719 | $0.00 | +0 | 63,475.958 |
55 more transactions are on Measure
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The assistant answers from what MPLX has actually filed: 14 annual reports filed with the SEC and 60 Form 4 filings from the last year. Every figure in a reply links to the filing it came from, so an answer can be checked rather than believed.
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Source
From SEC Form 4 filings, filed within two business days of a transaction.
Past transactions say nothing about future ones, and none of this is investment advice.
Watch MPLX and every open-market Form 4 worth a row (a purchase, a senior officer's sale, anything at a million dollars) lands in the bell and a daily email, with the 10b5-1 word on it when the filing says so. Free.
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Every Form 4 MPLX insiders file, not just the latest handful, with vesting and tax withholding struck out so what's left reads as a decision.
Every filingMeasure
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Each stake priced at the quarter it was filed, and diffed against the quarter before: how big a bet it is for them, and by how much it moved.
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The table above says who traded. This says what MPLX did over the following 30, 90 and 180 days after each open-market purchase and sale, from this company’s own record rather than a study about companies in general, and with the number of transactions shown beside every average.
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