Shawn M Lyon

CIK 1948454 · View on SEC EDGAR ↗

Insider

First SEC filing: Sept. 30, 2022 · Latest: Sept. 30, 2022

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Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

Insider transactions

0 buys (P) 1 sells (S) Net: $-875,000 + 30 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

30 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Aug. 13, 2026	MPC	S	2,500	$350.00	$875,000	12,619 Direct	-16.54%	Disposed	3.7% (price as of 2026-08-21)
March 11, 2026	MPC	G	1,186	—	—	15,119 Direct	-7.27%	Disposed	(price as of 2026-08-21)
Dec. 12, 2025	MPLX	F	245	$54.85	$13,438	25,054 Direct	-0.97%	Disposed	6.8% (price as of 2026-08-21)
Dec. 12, 2025	MPC	F	86	$185.77	$15,976	15,348 Direct	-0.56%	Disposed	95.3% (price as of 2026-08-21)
March 7, 2025	MPLX	P	4,000	$52.75	$211,000	25,299 Direct	+18.78%	Acquired	11.1% (price as of 2026-08-21)
March 3, 2025	MPLX	F	1,052	$54.34	$57,166	21,299 Direct	-4.71%	Disposed	7.8% (price as of 2026-08-21)
March 3, 2025	MPLX	F	936	$54.34	$50,862	22,351 Direct	-4.02%	Disposed	7.8% (price as of 2026-08-21)
March 3, 2025	MPC	F	240	$148.65	$35,676	15,434 Direct	-1.53%	Disposed	144.1% (price as of 2026-08-21)
March 3, 2025	MPC	F	189	$148.65	$28,095	15,674 Direct	-1.19%	Disposed	144.1% (price as of 2026-08-21)
March 3, 2025	MPC	F	480	$148.65	$71,352	15,863 Direct	-2.94%	Disposed	144.1% (price as of 2026-08-21)
March 1, 2025	MPLX	A	6,014	—	—	23,287 Direct	+34.82%	Acquired	(price as of 2026-08-21)
March 1, 2025	MPC	A	2,098	—	—	16,343 Direct	+14.73%	Acquired	(price as of 2026-08-21)
Dec. 13, 2024	MPLX	F	317	$48.86	$15,489	17,273 Direct	-1.80%	Disposed	19.9% (price as of 2026-08-21)
Dec. 13, 2024	MPC	F	73	$145.56	$10,626	14,245 Direct	-0.51%	Disposed	149.2% (price as of 2026-08-21)
March 1, 2024	MPLX	A	7,784	—	—	17,590 Direct	+79.38%	Acquired	(price as of 2026-08-21)
March 1, 2024	MPLX	F	936	$38.87	$36,382	9,806 Direct	-8.71%	Disposed	50.7% (price as of 2026-08-21)
March 1, 2024	MPC	A	1,778	—	—	14,318 Direct	+14.18%	Acquired	(price as of 2026-08-21)
March 1, 2024	MPC	F	170	$172.34	$29,298	12,540 Direct	-1.34%	Disposed	110.5% (price as of 2026-08-21)
March 1, 2024	MPC	F	480	$172.34	$82,723	12,710 Direct	-3.64%	Disposed	110.5% (price as of 2026-08-21)
March 1, 2024	MPC	F	455	$172.34	$78,415	13,190 Direct	-3.33%	Disposed	110.5% (price as of 2026-08-21)
Dec. 1, 2023	MPLX	F	282	$36.61	$10,324	10,742 Direct	-2.56%	Disposed	60.0% (price as of 2026-08-21)
Dec. 1, 2023	MPC	F	79	$151.42	$11,962	13,645 Direct	-0.58%	Disposed	139.6% (price as of 2026-08-21)
Sept. 8, 2023	MPC	G	1,312	—	—	13,724 Direct	-8.73%	Disposed	(price as of 2026-08-21)
Aug. 10, 2023	MPC	M	8,086	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Aug. 10, 2023	MPC	S	8,086	$147.15	$1,189,855	15,036 Direct	-34.97%	Disposed	146.5% (price as of 2026-08-21)
Aug. 10, 2023	MPC	M	8,086	$20.87	$168,755	23,122 Direct	+53.78%	Acquired	1638.4% (price as of 2026-08-21)
April 3, 2023	MPC	F	909	$135.88	$123,515	15,036 Direct	-5.70%	Disposed	167.0% (price as of 2026-08-21)
March 1, 2023	MPC	A	1,934	—	—	15,945 Direct	+13.80%	Acquired	(price as of 2026-08-21)
March 1, 2023	MPC	F	347	$126.52	$43,902	14,011 Direct	-2.42%	Disposed	186.7% (price as of 2026-08-21)
March 1, 2023	MPC	F	302	$126.52	$38,209	14,358 Direct	-2.06%	Disposed	186.7% (price as of 2026-08-21)
March 1, 2023	MPLX	A	6,926	—	—	11,024 Direct	+169.01%	Acquired	(price as of 2026-08-21)
Nov. 18, 2022	MPC	M	12,053	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Nov. 18, 2022	MPC	S	12,053	$121.65	$1,466,247	14,660 Direct	-45.12%	Disposed	198.2% (price as of 2026-08-21)
Nov. 18, 2022	MPC	M	12,053	$61.05	$735,836	26,713 Direct	+82.22%	Acquired	494.3% (price as of 2026-08-21)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
Aug. 10, 2023	MPC	Employee Stock Option (right to buy)	Common Stock (8,086)	$20.87	April 1, 2030	8,086	Disposed
Nov. 18, 2022	MPC	Employee Stock Option (right to buy)	Common Stock (12,053)	$61.05	April 1, 2029	12,053	Disposed

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 5 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
Sept. 30, 2022	MPC	Common Stock	14,660	Direct
Sept. 30, 2022	MPC	Common Stock	2,710	Indirect
Sept. 30, 2022	MPC	Employee Stock Option (right to buy)→ Common Stock (12,053)	12,053	Direct
Sept. 30, 2022	MPC	Employee Stock Option (right to buy)→ Common Stock (8,086)	8,086	Direct
Sept. 30, 2022	MPLX	Common Units (Limited Partner Interests)	4,098	Direct