MPLX / MPLX LP - Limited Partnership - Insider Trading and Ownership Report - SEC Form 3, 4, 5

Insider Trading Chart

Insider Roster and Profitability Metrics

This table shows the list known insiders, and is generated automatically from filings disclosed to the SEC. In addition to the names, most recent title, and director, officer, or 10% owner designation, we provide the latest disclosed holdings. Additionally, when possible we provide the historical trade performance for the insider. The historical trade performance is a weighted average of the performance of actual open-market purchase transactions made by the insider. For more information on how this is calculated, watch this YouTube webinar.

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Track Records of Insider Purchases - Short Term Profit Analysis

In this section, we analyze the profitability of every unplanned, open-market insider purchase made in MPLX / MPLX LP - Limited Partnership. This analysis helps to understand if the insider consistently generates abnormal returns, and is worth following. This analysis is for one-year following each trade, and the results are theoretical .

The following table shows the most recent open market purchases that were not part of an automatic trading plan.

Trade Date	Insider	Reported Shares	Reported Price	Adjusted Shares	Adjusted Price	Cost Basis	Days to Max	Price at Max	Max Profit ($)	Max Return (%)
2025-03-07	Lyon Shawn M	4,000	52.7500	4,000	52.7500	211,000	10	54.6500	7,600	3.60
2019-08-09	Peiffer Garry L.	18,800	27.3010	18,800	27.3010	513,259
2019-08-08	Heminger Gary R.	2,100	27.4386	2,100	27.4386	57,621
2019-08-08	Heminger Gary R.	2,100	27.4469	2,100	27.4469	57,638
2019-08-08	Heminger Gary R.	2,100	27.4168	2,100	27.4168	57,575
2019-08-08	Heminger Gary R.	2,100	27.4212	2,100	27.4212	57,585
2019-08-08	Heminger Gary R.	2,100	27.4000	2,100	27.4000	57,540
2019-08-08	Heminger Gary R.	2,100	27.4000	2,100	27.4000	57,540
2019-08-07	Heminger Gary R.	30,000	27.0860	30,000	27.0860	812,580

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

Track Records of Insider Sales - Short Term Loss Analysis

In this section, we analyze the short-term loss avoidance of every unplanned, open-market insider sale made in MPLX / MPLX LP - Limited Partnership. A consistent pattern of loss avoidance may suggest that future sale transactions may predict declines in price. This analysis is for one-year following each trade, and the results are theoretical .

The following table shows the most recent open market sales that were not part of an automatic trading plan.

Trade Date	Insider	Reported Shares	Reported Price	Adjusted Shares	Adjusted Price	Cost Basis	Days to Min	Price at Min	Max Loss Avoided ($)	Max Loss Avoided (%)
2024-11-18	HAGEDORN CARL KRISTOPHER	4,000	47.2400	4,000	47.2400	188,960	31	46.1400	-4,400	-2.33
2017-09-15	Bromley C Corwin	2,000	34.8000	2,000	34.8000	69,600
2017-09-14	Bromley C Corwin	500	34.8150	500	34.8150	17,408
2017-09-13	Bromley C Corwin	2,500	34.5000	2,500	34.5000	86,250

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

Transaction History

Click the link icon to see the full transaction history. Transactions reported as part of a 10b5-1 automatic trading plan will have an X in the column marked 10b-5.