All stock lists
Mplx LP (New York Stock Exchange:MPLX)
US · Delayed Price · Currency is USD
Energy · Oil & Gas Midstream
58.70-0.42 (-0.72%)
Insider Score
––Not scored
MPLX Insider Score
Insiders here have filed 7 Form 4s in the last 90 days, but all of them are share awards, grants or other non-market transactions. Those are compensation, not a decision to buy, so they are not scored.
MPLX Stock Insider Trading Activity
MPLX stock’s insider trading shows no open-market insider trades by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Breves Christine S Director | Award | 219 | — | — | 1.5% | 15,038 | Aug 14, 2026 | — | Form 4 |
| Peiffer Garry L. Director | Award | 1,232 | — | — | 1.8% | 69,313 | Aug 14, 2026 | — | Form 4 |
| Walker Ray N JR Director | Award | 82 | — | — | 1.8% | 4,609 | Aug 14, 2026 | — | Form 4 |
| SURMA JOHN P Director | Award | 1,563 | — | — | 1.7% | 95,448 | Aug 14, 2026 | — | Form 4 |
| STICE J MICHAEL Director | Award | 983 | — | — | 1.7% | 58,413 | Aug 14, 2026 | — | Form 4 |
| SEMPLE FRANK M Director | Award | 1,073 | — | — | 1.7% | 63,476 | Aug 14, 2026 | — | Form 4 |
| HELMS CHRISTOPHER A Director | Award | 1,337 | — | — | 1.6% | 86,208 | Aug 14, 2026 | — | Form 4 |
| Walker Ray N JR Director | Award | 78 | — | — | 2.0% | 4,069 | May 15, 2026 | — | Form 4 |
| SURMA JOHN P Director | Award | 1,656 | — | — | 1.8% | 93,426 | May 15, 2026 | — | Form 4 |
| STICE J MICHAEL Director | Award | 1,098 | — | — | 2.0% | 56,973 | May 15, 2026 | — | Form 4 |
| SEMPLE FRANK M Director | Award | 1,194 | — | — | 2.0% | 61,946 | May 15, 2026 | — | Form 4 |
| Peiffer Garry L. Director | Award | 1,304 | — | — | 2.0% | 67,623 | May 15, 2026 | — | Form 4 |
| HELMS CHRISTOPHER A Director | Award | 1,415 | — | — | 1.7% | 84,413 | May 15, 2026 | — | Form 4 |
| Breves Christine S Director | Award | 277 | — | — | 2.0% | 14,361 | May 15, 2026 | — | Form 4 |
| HELMS CHRISTOPHER A Director | Award | 2,696 | — | — | 3.3% | 83,447 | Apr 30, 2026 | — | Form 4 |
| SURMA JOHN P Director | Award | 3,029 | — | — | 3.4% | 92,219 | Apr 30, 2026 | — | Form 4 |
| STICE J MICHAEL Director | Award | 3,029 | — | — | 5.7% | 56,324 | Apr 30, 2026 | — | Form 4 |
| SEMPLE FRANK M Director | Award | 3,029 | — | — | 5.2% | 61,201 | Apr 30, 2026 | — | Form 4 |
| Peiffer Garry L. Director | Award | 2,696 | — | — | 4.2% | 66,769 | Apr 30, 2026 | — | Form 4 |
| Breves Christine S Director | Award | 2,696 | — | — | 22.8% | 14,534 | Apr 30, 2026 | — | Form 4 |
| Walker Ray N JR Director | Award | 2,247 | — | — | 129% | 3,991 | Apr 30, 2026 | — | Form 4 |
| SURMA JOHN P Director | Award | 2,580 | — | — | 2.9% | 91,770 | Apr 30, 2026 | — | Form 4 |
| STICE J MICHAEL Director | Award | 2,580 | — | — | 4.8% | 55,875 | Apr 30, 2026 | — | Form 4 |
| SEMPLE FRANK M Director | Award | 2,580 | — | — | 4.4% | 60,752 | Apr 30, 2026 | — | Form 4 |
| Peiffer Garry L. Director | Award | 2,247 | — | — | 3.5% | 66,319 | Apr 30, 2026 | — | Form 4 |
| HELMS CHRISTOPHER A Director | Award | 2,247 | — | — | 2.8% | 82,998 | Apr 30, 2026 | — | Form 4 |
| Breves Christine S Director | Award | 2,247 | — | — | 19.0% | 14,084 | Apr 30, 2026 | — | Form 4 |
| Walker Ray N JR Director | Award | 2,696 | — | — | 155% | 4,440 | Apr 30, 2026 | — | Form 4 |
| Floerke Gregory Scott COO | Tax withheld | 995 | $59.22 | $58.92K | 1.0% | 97,234 | Mar 2, 2026 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Award (A) — Grant or award from the company, not a purchase
- Tax withheld (F) — Shares withheld to pay tax or an exercise price
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.