← United States · Coverage record
US · SEC FORM 4
MPLX LP
MPLX · NYSE · CIK 0001552000 · Energy · Oil & Gas Midstream
INSIDER SIGNAL
0 qualifying P purchase groups
in the current 180-day scoring window
28 Form 4 transaction lines observed in the same window
0 sales · 28 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
Showing the six most active owners; 1 additional owner(s) remain in Form 4 evidence.
Purchase breadth, concentration & cluster buying
These modules activate when qualifying purchases enter the 180-day research window.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-03-07 · Lyon Shawn M.
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 6,685,785
- Previous report
- 6,632,787
- Avg daily volume
- 1,585,369
- Days to cover
- 4.2
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2025-03-07 | Lyon Shawn M | Purchase (P) | Common Units (Limited Partner Interests) | 4,000 | USD 52.75 | USD 211,000 | SEC filing ↗ |
Form 4 evidence
67 transaction lines in the latest 365-day window; 596 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-08-14 | Walker Ray N JR | Award / grant (A) | Common Units (Limited Partner Interests) | 82 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-14 | SURMA JOHN P | Award / grant (A) | Common Units (Limited Partner Interests) | 1,563 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-14 | STICE J MICHAEL | Award / grant (A) | Common Units (Limited Partner Interests) | 983 | USD 0.00 | USD 0 | SEC filing ↗ |
Show recent Form 4 evidence (30 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-08-14 | Walker Ray N JR | Award / grant (A) | Common Units (Limited Partner Interests) | 82 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-14 | SURMA JOHN P | Award / grant (A) | Common Units (Limited Partner Interests) | 1,563 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-14 | STICE J MICHAEL | Award / grant (A) | Common Units (Limited Partner Interests) | 983 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-14 | SEMPLE FRANK M | Award / grant (A) | Common Units (Limited Partner Interests) | 1,073 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-14 | Peiffer Garry L. | Award / grant (A) | Common Units (Limited Partner Interests) | 1,232 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-14 | HELMS CHRISTOPHER A | Award / grant (A) | Common Units (Limited Partner Interests) | 1,337 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-14 | Breves Christine S | Award / grant (A) | Common Units (Limited Partner Interests) | 219 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-15 | Walker Ray N JR | Award / grant (A) | Common Units (Limited Partner Interests) | 78 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-15 | SURMA JOHN P | Award / grant (A) | Common Units (Limited Partner Interests) | 1,656 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-15 | STICE J MICHAEL | Award / grant (A) | Common Units (Limited Partner Interests) | 1,098 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-15 | SEMPLE FRANK M | Award / grant (A) | Common Units (Limited Partner Interests) | 1,194 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-15 | Peiffer Garry L. | Award / grant (A) | Common Units (Limited Partner Interests) | 1,304 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-15 | HELMS CHRISTOPHER A | Award / grant (A) | Common Units (Limited Partner Interests) | 1,415 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-15 | Breves Christine S | Award / grant (A) | Common Units (Limited Partner Interests) | 277 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | Walker Ray N JR | Award / grant (A) | Common Units (Limited Partner Interests) | 2,696 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | SURMA JOHN P | Award / grant (A) | Common Units (Limited Partner Interests) | 3,029 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | STICE J MICHAEL | Award / grant (A) | Common Units (Limited Partner Interests) | 3,029 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | SEMPLE FRANK M | Award / grant (A) | Common Units (Limited Partner Interests) | 3,029 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | Peiffer Garry L. | Award / grant (A) | Common Units (Limited Partner Interests) | 2,696 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | HELMS CHRISTOPHER A | Award / grant (A) | Common Units (Limited Partner Interests) | 2,696 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | Breves Christine S | Award / grant (A) | Common Units (Limited Partner Interests) | 2,696 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | Walker Ray N JR | Award / grant (A) | Common Units (Limited Partner Interests) | 2,247 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | SURMA JOHN P | Award / grant (A) | Common Units (Limited Partner Interests) | 2,580 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | STICE J MICHAEL | Award / grant (A) | Common Units (Limited Partner Interests) | 2,580 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | SEMPLE FRANK M | Award / grant (A) | Common Units (Limited Partner Interests) | 2,580 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | Peiffer Garry L. | Award / grant (A) | Common Units (Limited Partner Interests) | 2,247 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | HELMS CHRISTOPHER A | Award / grant (A) | Common Units (Limited Partner Interests) | 2,247 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-30 | Breves Christine S | Award / grant (A) | Common Units (Limited Partner Interests) | 2,247 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-02 | Mannen Maryann T. | Tax withholding (F) | Common Units (Limited Partner Interests) | 13,220 | USD 59.22 | USD 782,888 | SEC filing ↗ |
| 2026-03-02 | Lyon Shawn M | Tax withholding (F) | Common Units (Limited Partner Interests) | 2,751 | USD 59.22 | USD 162,914 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | MPLX |
| CIK | 0001552000 |
| Sector | Energy |
| Industry | Oil & Gas Midstream Yahoo Finance |
| SEC SIC | 4610 Pipe Lines (No Natural Gas) |
| Exchange | NYSE |
Data coverage
| Local Form 4 history | 596 transaction lines from 2020-01-02 to 2026-08-14 1 P purchase lines · 12 S sale lines · 583 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.