Reporting Owner Activity for Mannen Maryann T.

Location: Findlay, OH
Insider ownership read: Parsed Forms 3/4/5 show at least $35,838,833 in disclosed insider holdings for Mannen Maryann T. as of 14 May 2026.
Chairman, President & Ceo, Director: Marathon Petroleum Corp (MPC) - about $23.07M reported
Chairman, President & Ceo, Director: MPLX LP (MPLX) - about $9.8M reported
Director: Owens Corning (OC) - about $2.97M reported
1 additional issuer positions are listed below.
Values are based on parsed SEC Forms 3/4/5 and should be verified against the source filing.
Signature: /s/ Richard J. Baker, attorney-in-fact
Source filings: Open source filing history

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Key facts

Mannen Maryann T. has 4 issuer positions tracked on this page.
Estimated disclosed ownership value: $35,838,833.
Recent insider filing activity is available below.

Change

Largest disclosed position: Marathon Petroleum Corp ($23,074,036).
Past-year value change for that position: .

Research use

This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
You can cross-check role, issuer, and filing chronology directly against the SEC source.