Exhibit 99.1 MPLX LP Reports Third-Quarter 2024 Financial Results • Third-quarter net income attributable to MPLX of 1.0billionandnetcashprovidedbyoperatingactivitiesof1.4 billion • 1.7billionofadjustedEBITDAattributabletoMPLXand1.4 billion of distributable cash flow • 949millionofcapitalreturnedtounitholders•Increasedquarterlydistributionby12.53.83 per unit annualized • Executing growth strategy in the Northeast with additional processing plant; expected to bring t ...