Insider Trading & Ownership of Mannen Maryann T.

Location
Findlay, OH
Summary
The estimated net worth of Mannen Maryann T. is at least $35,838,833 dollars as of 13 Apr 2026. Mannen Maryann T. is the Chairman, President & CEO, Director of Marathon Petroleum Corp and owns shares of Marathon Petroleum Corp (MPC) stock worth about $23.07M. Mannen Maryann T. is the Chairman, President & CEO, Director of MPLX LP and owns shares of MPLX LP (MPLX) stock worth about $9.8M. Mannen Maryann T. is the Director of Owens Corning and owns shares of Owens Corning (OC) stock worth about $2.97M.
Signature
/s/ Katherine M. Serevitch, Attorney-in-Fact
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Quick Takeaways

  • Mannen Maryann T. has 3 issuer positions tracked on this page.
  • Estimated disclosed ownership value: $35,838,833.
  • Recent insider filing activity is available below.

What Changed

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

Why This Matters

  • 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.

Source Evidence

Filed on Form 4

Insider ownership context is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Ownership of Mannen Maryann T.

Symbol Company Relationship Holdings Value Past Year Net Change Change % Report Period
MPC Marathon Petroleum Corp Chairman, President & CEO, Director $23,074,036 01 Mar 2026
MPLX, MPLXP MPLX LP Chairman, President & CEO, Director $9,798,481 01 Mar 2026
OC Owens Corning Director $2,966,316 09 Apr 2026

Insider Transactions Reported by Mannen Maryann T.:

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.
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