SEC Form 4 reporting owner

Lyon Shawn M

Lyon Shawn M has filed 14 Form 4 transactions reported between December 12, 2025 and August 31, 2026, as SVP Log & Storage, MPLX GP LLC of Marathon Petroleum Corp and Senior VP, Log. & Storage of MPLX LP.

Name as filed: Lyon Shawn M

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$1.4M

3 lines

Companies

with Form 4 filings

Latest transaction

Aug 31, 2026

transaction date

Roles and reported holdings

MPCMarathon Petroleum Corp
Dec 12, 2025 – Aug 31, 2026
SVP Log & Storage, MPLX GP LLC
Held directly11,194 sh as of Aug 31, 2026 · Form 4
24 months: $1.4M sold
MPLXMPLX LP
Dec 12, 2025 – Mar 2, 2026
Senior VP, Log. & Storage
Held directly28,289 sh as of Mar 2, 2026 · Form 4

Transaction history

All 14 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Aug 31, 2026	MPCSVP Log & Storage, MPLX GP LLC	Open-market saleCode S · direct	1,000	$375.75	$376K@ $375.75	11,194	Form 4
Aug 28, 2026	MPCSVP Log & Storage, MPLX GP LLC	Open-market saleCode S · direct	425	$368.51	$157K@ $368.51	12,194	Form 4
Aug 13, 2026	MPCSVP Log & Storage, MPLX GP LLC	Open-market saleCode S · direct	2,500	$350.00	$875K@ $350.00	12,619	Form 4
Mar 11, 2026	MPCSVP Log & Storage, MPLX GP LLC	GiftCode G · direct	1,186	—	—	15,119	Form 4
Mar 2, 2026	MPLXSenior VP, Log. & Storage	Shares withheld for tax or exercise priceCode F · direct	798	$59.22	$47K@ $59.22	28,289	Form 4
Mar 2, 2026	MPLXSenior VP, Log. & Storage	Shares withheld for tax or exercise priceCode F · direct	1,033	$59.22	$61K@ $59.22	29,087	Form 4
Mar 2, 2026	MPLXSenior VP, Log. & Storage	Shares withheld for tax or exercise priceCode F · direct	920	$59.22	$54K@ $59.22	30,120	Form 4
Mar 2, 2026	MPCSVP Log & Storage, MPLX GP LLC	Shares withheld for tax or exercise priceCode F · direct	279	$206.30	$58K@ $206.30	16,305	Form 4
Mar 2, 2026	MPCSVP Log & Storage, MPLX GP LLC	Shares withheld for tax or exercise priceCode F · direct	237	$206.30	$49K@ $206.30	16,584	Form 4
Mar 2, 2026	MPCSVP Log & Storage, MPLX GP LLC	Shares withheld for tax or exercise priceCode F · direct	257	$206.30	$53K@ $206.30	16,821	Form 4
Mar 1, 2026	MPLXSenior VP, Log. & Storage	Grant or awardCode A · direct	5,986	—	—	31,040	Form 4
Mar 1, 2026	MPCSVP Log & Storage, MPLX GP LLC	Grant or awardCode A · direct	1,730	—	—	17,078	Form 4
Dec 12, 2025	MPLXSenior VP, Log. & Storage	Shares withheld for tax or exercise priceCode F · direct	245	$54.85	$13K@ $54.85	25,054	Form 4
Dec 12, 2025	MPCSVP Log & Storage, MPLX GP LLC	Shares withheld for tax or exercise priceCode F · direct	86	$185.77	$16K@ $185.77	15,348	Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.