Insider Trading & Ownership of Maryann T. Mannen

Location: Findlay, OH
Summary: The estimated net worth of Maryann T. Mannen is at least $30,300,722 dollars as of 23 Jan 2026. Maryann T. Mannen is the President & CEO, Director of Marathon Petroleum Corp and owns shares of Marathon Petroleum Corp (MPC) stock worth about $16.73M. Maryann T. Mannen is the President & CEO, Director of MPLX LP and owns shares of MPLX LP (MPLX) stock worth about $10.22M. Maryann T. Mannen is the Director of Owens Corning and owns shares of Owens Corning (OC) stock worth about $3.35M.
Signature: /s/ Katherine M. Serevitch, Attorney-in-Fact
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Ownership of Maryann T. Mannen

Symbol	Company	Relationship	Holdings Value	Report Period
MPC	Marathon Petroleum Corp	President & CEO, Director	$16,730,015	01 Aug 2025
MPLX, MPLXP	MPLX LP	President & CEO, Director	$10,224,918	01 Mar 2025
OC	Owens Corning	Director	$3,345,789	21 Jan 2026

Sym	Company	Class	Transaction	%	Value $	* Price $	Shares	Shares After	Date	Ownership

* An asterisk sign (*) next to the price indicates that the price is likely invalid.