The Filings Report

MPLX LP insider trading

MPLXfinancial statementsForm 4 filings on EDGAR143 transactions since Nov 1, 2024

From August 4, 2026 to November 1, 2026, 0 insiders at MPLX LP bought $0 of stock in the open market, and 0 sold $0. Officers and directors accounted for $0 of purchases and $0 of sales. The last reported transaction was an award by Peiffer Garry L. on August 14, 2026.

The answer card and chart use the same period. Change the range above the chart to update both. Form 4 filings through August 18, 2026; awards, option exercises, tax withholding and gifts are excluded from these totals.

Stock price and insider activity

Daily price candles with insider purchases and sales directly beneath them on the same timeline. Bars show individual days; totals sum all days in the selected period.

MPLX daily priceSplit-adjusted prices in US dollars

Bought $0Sold $0Aug 4, 2026 – Nov 1, 2026

Oct 30, 2026O $60.50 · H $60.72 · L $59.81 · C $60.16Bought $0 (0)Sold $0 (0)
$56$57$58$60$612026-08-04: open $58.97, high $60.66, low $58.28, close $60.512026-08-05: open $60.83, high $60.95, low $59.24, close $59.292026-08-06: open $59.68, high $60.49, low $59.33, close $60.422026-08-07: open $58.68, high $59.56, low $58.53, close $58.852026-08-10: open $58.85, high $59.05, low $58.29, close $58.702026-08-11: open $58.50, high $59.53, low $58.50, close $59.302026-08-12: open $59.50, high $60.16, low $59.47, close $59.942026-08-13: open $59.75, high $60.08, low $58.82, close $58.822026-08-14: open $59.00, high $59.51, low $58.70, close $59.482026-08-17: open $59.30, high $59.74, low $59.00, close $59.082026-08-18: open $59.33, high $59.89, low $59.18, close $59.362026-08-19: open $59.46, high $59.65, low $58.59, close $58.692026-08-20: open $58.80, high $59.26, low $58.55, close $58.602026-08-21: open $58.49, high $58.95, low $57.65, close $58.412026-08-24: open $58.48, high $58.75, low $58.19, close $58.462026-08-25: open $58.47, high $58.70, low $58.11, close $58.362026-08-26: open $58.25, high $59.43, low $58.25, close $59.322026-08-27: open $59.45, high $59.72, low $58.59, close $59.512026-08-28: open $59.25, high $59.75, low $59.23, close $59.252026-08-31: open $59.35, high $59.54, low $58.96, close $59.172026-09-01: open $59.22, high $59.73, low $58.86, close $59.092026-09-02: open $59.37, high $59.65, low $58.78, close $58.992026-09-03: open $59.33, high $60.04, low $59.04, close $59.342026-09-04: open $59.28, high $59.77, low $58.94, close $59.672026-09-08: open $59.82, high $60.29, low $59.13, close $59.832026-09-09: open $60.24, high $60.39, low $59.91, close $60.232026-09-10: open $60.15, high $60.21, low $59.42, close $59.632026-09-11: open $59.68, high $60.21, low $59.59, close $59.842026-09-14: open $60.04, high $60.09, low $58.53, close $58.892026-09-15: open $58.91, high $59.20, low $58.32, close $58.422026-09-16: open $58.76, high $58.84, low $57.36, close $57.932026-09-17: open $58.23, high $59.00, low $58.21, close $58.622026-09-18: open $58.69, high $59.55, low $58.53, close $59.442026-09-21: open $59.40, high $59.60, low $58.83, close $59.092026-09-22: open $58.71, high $60.04, low $58.70, close $59.162026-09-23: open $59.25, high $59.82, low $58.33, close $58.812026-09-24: open $58.99, high $59.08, low $57.92, close $57.982026-09-25: open $57.86, high $57.95, low $56.67, close $56.802026-09-28: open $56.83, high $57.85, low $56.02, close $57.662026-09-29: open $57.50, high $57.76, low $56.60, close $57.052026-09-30: open $56.92, high $57.48, low $56.03, close $56.322026-10-01: open $56.37, high $56.72, low $55.95, close $56.352026-10-02: open $56.25, high $56.74, low $56.09, close $56.382026-10-05: open $56.34, high $57.65, low $56.31, close $57.372026-10-06: open $57.37, high $57.89, low $56.57, close $57.772026-10-07: open $57.86, high $57.93, low $56.88, close $57.052026-10-08: open $57.46, high $57.54, low $57.12, close $57.322026-10-09: open $57.33, high $57.56, low $56.03, close $56.302026-10-12: open $56.32, high $57.09, low $56.32, close $56.832026-10-13: open $57.12, high $57.26, low $56.75, close $56.912026-10-14: open $56.75, high $57.74, low $56.25, close $57.462026-10-15: open $57.75, high $57.76, low $56.63, close $57.122026-10-16: open $57.34, high $58.25, low $57.34, close $58.162026-10-19: open $57.96, high $58.28, low $57.52, close $58.182026-10-20: open $58.35, high $58.40, low $57.67, close $58.392026-10-21: open $58.63, high $58.74, low $57.95, close $58.442026-10-22: open $58.30, high $58.53, low $57.35, close $58.182026-10-23: open $58.43, high $59.23, low $58.10, close $59.132026-10-26: open $59.00, high $59.17, low $58.27, close $58.652026-10-27: open $58.63, high $58.76, low $57.72, close $58.112026-10-28: open $58.44, high $58.97, low $58.18, close $58.932026-10-29: open $59.50, high $60.10, low $59.40, close $59.892026-10-30: open $60.50, high $60.72, low $59.81, close $60.16Insider purchases / sales · USD$0No open-market purchases or sales in this period.Aug 4Aug 26Sep 17Oct 9Oct 30

purchases above zero; sales below. Both use the transaction date and the same dollar scale. Hover, tap, or use arrow keys to inspect a date. Awards, exercises, tax withholding and gifts are excluded.

Dates with prices or insider activity are spaced evenly; empty weekends and holidays are omitted. Prices through Oct 30, 2026. Insider data through Nov 1, 2026. Prices are adjusted for splits; transaction values are reported dollars.

Every transaction

143 transactions from November 1, 2024 to November 1, 2026, newest first. Open-market purchases and sales are coloured; awards, exercises, tax withholding and gifts are grey and not counted.

TradedInsiderRoleTransactionSharesPriceValueHeld afterFiled
Aug 14, 2026Peiffer Garry L.Directoraward1,232$0.00—69,313Aug 18, 2026
Aug 14, 2026Walker Ray N JRDirectoraward82$0.00—4,609Aug 18, 2026
Aug 14, 2026Surma John PDirectoraward1,563$0.00—95,448Aug 18, 2026
Aug 14, 2026Stice J MichaelDirectoraward983$0.00—58,413Aug 18, 2026
Aug 14, 2026Semple Frank MDirectoraward1,073$0.00—63,476Aug 18, 2026
Aug 14, 2026Helms Christopher ADirectoraward1,337$0.00—86,208Aug 18, 2026
Aug 14, 2026Breves Christine SDirectoraward219$0.00—15,038Aug 18, 2026
May 15, 2026Walker Ray N JRDirectoraward78$0.00—4,069May 19, 2026
May 15, 2026Surma John PDirectoraward1,656$0.00—93,426May 19, 2026
May 15, 2026Stice J MichaelDirectoraward1,098$0.00—56,973May 19, 2026
May 15, 2026Semple Frank MDirectoraward1,194$0.00—61,946May 19, 2026
May 15, 2026Peiffer Garry L.Directoraward1,304$0.00—67,623May 19, 2026
May 15, 2026Helms Christopher ADirectoraward1,415$0.00—84,413May 19, 2026
May 15, 2026Breves Christine SDirectoraward277$0.00—14,361May 19, 2026
Apr 30, 2026Walker Ray N JRDirectoraward2,696$0.00—4,440Aug 5, 2026
Apr 30, 2026Surma John PDirectoraward3,029$0.00—92,219Aug 5, 2026
Apr 30, 2026Stice J MichaelDirectoraward3,029$0.00—56,324Aug 5, 2026
Apr 30, 2026Semple Frank MDirectoraward3,029$0.00—61,201Aug 5, 2026
Apr 30, 2026Peiffer Garry L.Directoraward2,696$0.00—66,769Aug 5, 2026
Apr 30, 2026Helms Christopher ADirectoraward2,696$0.00—83,447Aug 5, 2026
Apr 30, 2026Breves Christine SDirectoraward2,696$0.00—14,534Aug 5, 2026
Apr 30, 2026Walker Ray N JRDirectoraward2,247$0.00—3,991May 4, 2026
Apr 30, 2026Surma John PDirectoraward2,580$0.00—91,770May 4, 2026
Apr 30, 2026Stice J MichaelDirectoraward2,580$0.00—55,875May 4, 2026
Apr 30, 2026Semple Frank MDirectoraward2,580$0.00—60,752May 4, 2026
Apr 30, 2026Peiffer Garry L.Directoraward2,247$0.00—66,319May 4, 2026
Apr 30, 2026Helms Christopher ADirectoraward2,247$0.00—82,998May 4, 2026
Apr 30, 2026Breves Christine SDirectoraward2,247$0.00—14,084May 4, 2026
Mar 2, 2026Mannen Maryann T.Chairman, President & CEO, Directortax withholding3,407$59.22$202K175,272Mar 3, 2026
Mar 2, 2026Mannen Maryann T.Chairman, President & CEO, Directortax withholding3,404$59.22$202K171,868Mar 3, 2026
Mar 2, 2026Mannen Maryann T.Chairman, President & CEO, Directortax withholding6,409$59.22$380K165,459Mar 3, 2026
Mar 2, 2026Lyon Shawn MSenior VP, Log. & Storagetax withholding920$59.22$54K30,120Mar 3, 2026
Mar 2, 2026Lyon Shawn MSenior VP, Log. & Storagetax withholding1,033$59.22$61K29,087Mar 3, 2026
Mar 2, 2026Lyon Shawn MSenior VP, Log. & Storagetax withholding798$59.22$47K28,289Mar 3, 2026
Mar 2, 2026Hagedorn Carl KristopherExec VP & Chief Fin Ofc, Directortax withholding422$59.22$25K21,988Mar 3, 2026
Mar 2, 2026Hagedorn Carl KristopherExec VP & Chief Fin Ofc, Directortax withholding916$59.22$54K21,072Mar 3, 2026
Mar 2, 2026Hagedorn Carl KristopherExec VP & Chief Fin Ofc, Directortax withholding663$59.22$39K20,409Mar 3, 2026
Mar 2, 2026Floerke Gregory ScottExec. VP and COOtax withholding797$59.22$47K95,337Mar 3, 2026
Mar 2, 2026Floerke Gregory ScottExec. VP and COOtax withholding1,100$59.22$65K96,134Mar 3, 2026
Mar 2, 2026Floerke Gregory ScottExec. VP and COOtax withholding995$59.22$59K97,234Mar 3, 2026
Mar 2, 2026Benson Molly RChief Legal Ofc & Corp Sectax withholding1,240$59.22$73K47,112Mar 3, 2026
Mar 2, 2026Benson Molly RChief Legal Ofc & Corp Sectax withholding998$59.22$59K46,114Mar 3, 2026
Mar 2, 2026Benson Molly RChief Legal Ofc & Corp Sectax withholding614$59.22$36K48,352Mar 3, 2026
Mar 1, 2026Mannen Maryann T.Chairman, President & CEO, Directoraward52,817$0.00—178,679Mar 3, 2026
Mar 1, 2026Lyon Shawn MSenior VP, Log. & Storageaward5,986$0.00—31,040Mar 3, 2026
Mar 1, 2026Khoury Maria ADirectoraward8,451$0.00—8,451Mar 3, 2026
Mar 1, 2026Hagedorn Carl KristopherExec VP & Chief Fin Ofc, Directoraward4,930$0.00—22,410Mar 3, 2026
Mar 1, 2026Floerke Gregory ScottExec. VP and COOaward5,986$0.00—98,229Mar 3, 2026
Mar 1, 2026Benson Molly RChief Legal Ofc & Corp Secaward8,803$0.00—48,966Mar 3, 2026
Feb 17, 2026Walker Ray N JRDirectoraward32$0.00—1,744Feb 19, 2026

Who the insiders are

Everyone who reported a transaction since November 1, 2024, by open-market value over twelve months. Shares held are after the insider’s latest directly held transaction.

InsiderRoleLast transactionKindShares heldBought, 12 monthsSold, 12 monthsSales under a plan
Peiffer Garry L.DirectorAug 14, 2026award69,313———
Surma John PDirectorAug 14, 2026award95,448———
Stice J MichaelDirectorAug 14, 2026award58,413———
Semple Frank MDirectorAug 14, 2026award63,476———
Helms Christopher ADirectorAug 14, 2026award86,208———
Breves Christine SDirectorAug 14, 2026award15,038———
Lyon Shawn MSenior VP, Log. & StorageMar 2, 2026tax withholding30,120———
Floerke Gregory ScottExec. VP and COOMar 2, 2026tax withholding95,337———
Benson Molly RChief Legal Ofc & Corp SecMar 2, 2026tax withholding47,112———
Hagedorn Carl KristopherExec VP & Chief Fin Ofc, DirectorMar 2, 2026tax withholding21,988———
Mannen Maryann T.Chairman, President & CEO, DirectorMar 2, 2026tax withholding175,272———
Walker Ray N JRDirectorAug 14, 2026award4,609———
Hennigan Michael JExecutive Chairman, DirectorDec 12, 2025tax withholding359,137———
Quaid John JDirectorMar 3, 2025tax withholding52,393———
Khoury Maria ADirectorMar 1, 2026award8,451———

Questions

Are MPLX LP insiders buying or selling?

Over the twelve months to November 1, 2026, no insider at MPLX LP sold stock in the open market, and no insider bought. Purchases and sales netted to zero. Only open-market purchases and sales are counted.

Who sold the most MPLX LP stock in the last year?

No insider sold MPLX LP stock in the open market in the twelve months to November 1, 2026.

Do MPLX LP executives sell under 10b5-1 plans?

There were no open-market sales in the last twelve months.

What counts as insider buying here?

Only open-market purchases (Form 4 code P) and sales (code S) by officers, directors and 10% owners. Stock awards, option exercises, shares withheld for tax and gifts are listed in the table but never counted as buying or selling.

More on MPLX LP

From Form 4, 4/A and 5 filings with the SEC. A record of insider transactions, not a recommendation.