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NYSE: MPLX
Mplx LP Stock Ownership - Who owns Mplx?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Mplx LP insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Maryann T. MannenChairman President CEO2026-03-026,409$59.22
$379.54kSell
Molly R. BensonChief Legal Ofc Corp Sec2026-03-02614$59.22
$36.36kSell
Molly R. BensonChief Legal Ofc Corp Sec2026-03-021,240$59.22
$73.43kSell
Molly R. BensonChief Legal Ofc Corp Sec2026-03-02998$59.22
$59.10kSell
Shawn M. LyonSenior VP Log. Storage2026-03-021,033$59.22
$61.17kSell
Shawn M. LyonSenior VP Log. Storage2026-03-02798$59.22
$47.26kSell
Maryann T. MannenChairman President CEO2026-03-023,407$59.22
$201.76kSell
Maryann T. MannenChairman President CEO2026-03-023,404$59.22
$201.58kSell
Gregory Scott FloerkeExec. VP and COO2026-03-02995$59.22
$58.92kSell
Gregory Scott FloerkeExec. VP and COO2026-03-021,100$59.22
$65.14kSell

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Net Insider Buy/Sell (L12M) Ownership

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MPLX Shareholders

What type of owners hold Mplx LP stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Marathon Petroleum Corp63.86%647,415,452$38.51BInsider
Andeavor49.78%504,701,934$30.02BInsider
Mplx Holdings Inc7.84%79,466,136$4.73BInsider
Markwest Hydrocarbon Inc7.84%79,466,136$4.73BInsider
Chickasaw Capital Management LLC0.51%5,211,734$309.99MInstitution
Frank M. Semple0.06%657,699$39.12MInsider
John C. Mollenkopf0.04%413,452$24.59MInsider
Gregory James Goff0.04%385,168$22.91MInsider
Northside Capital Management LLC0.04%362,982$21.59MInstitution
Michael J. Hennigan0.04%359,137$21.36MInsider

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MPLX vs Oil & Gas Midstream Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
MPLX0.01%99.99%Net Selling
OKE0.08%0.89%Net SellingNet Buying
TRGP0.09%22.22%Net SellingNet Selling
LNG0.09%22.73%Net Selling
TRP0.07%0.00%
View Top Oil & Gas Midstream Stocks

Mplx Stock Ownership FAQ

Who owns Mplx?

Mplx (NYSE: MPLX) is owned by 0.02% institutional shareholders, 129.71% Mplx insiders, and 0.00% retail investors. Marathon Petroleum Corp is the largest individual Mplx shareholder, owning 647.42M shares representing 63.86% of the company. Marathon Petroleum Corp's Mplx shares are currently valued at $38.51B.

If you're new to stock investing, here's how to buy Mplx stock.
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