MPLX (NYSE: MPLX) insider transactions

In the twelve months to 10 November 2026, executives and directors of MPLX reported no open-market sales and no open-market purchases, according to the Form 4 filings they submitted to the SEC.

Latest transactions

The 20 most recent transactions in MPLX shares reported on Form 4
Date	Insider	Role	Transaction	Shares	Price	Held after	Filing
1 November 2026	Dunn Micheal G.	Director	Grant or award	+1,277	—	1,277	Form 4
1 November 2026	Niemeyer Bruce L	Director	Grant or award	+1,277	—	1,277	Form 4
14 August 2026	Breves Christine S	Director	Grant or award	+219	—	15,038	Form 4
14 August 2026	Helms Christopher A	Director	Grant or award	+1,337	—	86,208	Form 4
14 August 2026	Semple Frank M	Director	Grant or award	+1,073	—	63,476	Form 4
14 August 2026	Stice J Michael	Director	Grant or award	+983	—	58,413	Form 4
14 August 2026	Surma John P	Director	Grant or award	+1,563	—	95,448	Form 4
14 August 2026	Walker Ray N JR	Director	Grant or award	+82	—	4,609	Form 4
14 August 2026	Peiffer Garry L.	Director	Grant or award	+1,232	—	69,313	Form 4
15 May 2026	Breves Christine S	Director	Grant or award	+277	—	14,361	Form 4
15 May 2026	Helms Christopher A	Director	Grant or award	+1,415	—	84,413	Form 4
15 May 2026	Peiffer Garry L.	Director	Grant or award	+1,304	—	67,623	Form 4
15 May 2026	Semple Frank M	Director	Grant or award	+1,194	—	61,946	Form 4
15 May 2026	Stice J Michael	Director	Grant or award	+1,098	—	56,973	Form 4
15 May 2026	Surma John P	Director	Grant or award	+1,656	—	93,426	Form 4
15 May 2026	Walker Ray N JR	Director	Grant or award	+78	—	4,069	Form 4
30 April 2026	Breves Christine S	Director	Grant or award	+2,247	—	14,084	Form 4
30 April 2026	Helms Christopher A	Director	Grant or award	+2,247	—	82,998	Form 4
30 April 2026	Peiffer Garry L.	Director	Grant or award	+2,247	—	66,319	Form 4
30 April 2026	Semple Frank M	Director	Grant or award	+2,580	—	60,752	Form 4

Names appear as in the filing, surname first. A dash in the price column means the filing reports none, as in grants and gifts.

How to read the table

Only open-market purchases and sales are trades the insider chose to make at the market price, and they are the ones counted in the summary above. Grants, option exercises and shares withheld for tax come from pay plans. A sale marked as a 10b5-1 plan was scheduled in advance under a written plan.

Where each row comes from

From the Form 4 that each executive, director or large shareholder must file with the SEC within two business days of a transaction, read up to 10 November 2026. Each row links to its filing on EDGAR. Only transactions in shares are listed, not derivatives, and amended filings are left out. The accounts of the company are on the MPLX page; the method, in data sources.

Information prepared from the Form 4 filings submitted to the SEC, for information purposes only. It is not financial advice or a recommendation to buy or sell. Updated on 12 November 2026.