MPLX LP filings document the disclosure record of a Delaware master limited partnership with common units representing limited partnership interests listed on the New York Stock Exchange. Its reports include 8-K disclosures for operating results and financial condition, exhibits containing earnings releases, and annual reporting on the partnership's midstream energy infrastructure and logistics business.
The filing record also covers capital-structure and financing matters, including revolving credit agreements, underwriting agreements, supplemental indentures, and debt-securities exhibits filed under registration statements. Governance disclosures address MPLX GP LLC as general partner, board and officer changes, compensatory arrangements, shareholder voting matters, material-event reporting, and risk disclosure tied to the partnership's operations and securities.
MPLX LP (MPLX) reported that a director received a grant of common units representing limited partner interests. On 2026-08-14, the reporting person acquired 1,563.4270 common units in a grant or award transaction at a stated price of $0.0000 per unit, bringing the director’s directly held position to 95,447.7770 units.
MPLX LP (MPLX) reported that director J. Michael Stice received a grant of 982.715 Common Units (Limited Partner Interests) on 2026-08-14 at a stated price of $0.0000 per unit, described as a grant/award acquisition. Following this grant, he holds 58,412.913 units directly and 700 units indirectly through The Mike Stice Trust.
MPLX LP (symbol: MPLX) is the issuer of record for a Form 4 filing submitted to the SEC.
MPLX LP (symbol: MPLX) is the issuer of record for a Form 4 filing submitted to the SEC.
MPLX LP (MPLX) reported that a director received an additional equity award in the form of common units. Reporting person Christine S. Breves acquired 218.82 common units of limited partner interests at a stated price of $0.00 per unit, increasing her direct holdings to 15,038.282 units.
MPLX LP is issuing $2,250,000,000 of senior unsecured notes: $1.25 billion 4.700% notes due 2029, $500 million 5.000% notes due 2032, and $500 million 5.500% notes due 2036. Interest is paid semi-annually on May 1 and November 1, starting May 1, 2027.
The notes are senior unsecured obligations of MPLX LP, effectively junior to secured debt and structurally subordinated to all liabilities of its subsidiaries. MPLX expects net proceeds of approximately $2,210 million, to be used to repay $1,250 million 4.125% senior notes due March 2027, with the remainder for general partnership purposes including capital expenditures and working capital.
As of June 30, 2026, total consolidated debt was $26,005 million, which would be about $27,005 million on an as-adjusted basis after this offering and the planned use of proceeds. MPLX maintains a $2.5 billion unsecured revolving credit facility with a maximum Consolidated Total Debt to Consolidated EBITDA ratio of 5.0 to 1.0 under its covenant.
MPLX LP plans to issue three new series of unsecured, unsubordinated senior notes under its existing indenture. Each series will pay fixed interest semi-annually beginning in 2027, may be redeemed at MPLX’s option (including a Treasury-based make‑whole call before specified Par Call Dates), and will rank equally with MPLX’s other senior unsecured debt but be effectively junior to any secured debt and structurally subordinated to obligations of its subsidiaries.
MPLX reports consolidated debt of $26,005 million as of June 30, 2026 and intends to use the net proceeds to repay or redeem its $1,250 million 4.125% senior notes due March 2027, with any remaining proceeds for general partnership purposes such as capital expenditures and working capital. MPLX is a large-cap master limited partnership sponsored and controlled by Marathon Petroleum Corporation, which owned about 64% of MPLX’s outstanding common units as of June 30, 2026.
The new notes are not protected by a change‑of‑control put, are not guaranteed by subsidiaries, and have no sinking fund. The base indenture contains limited covenants on liens and sale‑leaseback transactions tied to assets designated as principal properties and includes standard events of default, merger restrictions, and defeasance provisions. The notes will be issued only in book‑entry form through DTC, with no application for listing on any securities exchange.
Walker Ray N JR reported acquisition or exercise transactions in this Form 4 filing.
MPLX LP reported that director Ray N. Walker Jr. received a grant of 2,696.387 Common Units (limited partner interests) as his annual 2026 equity retainer award on April 30, 2026. The amended report corrects this award amount and shows he beneficially owned 4,440.086 units directly after the grant as of that date, excluding any later transactions.
SURMA JOHN P reported acquisition or exercise transactions in this Form 4 filing.
John P. Surma, a director associated with MPLX LP, received a grant of 3,028.941 Common Units (Limited Partner Interests) on April 30, 2026 as his annual 2026 equity retainer award, at a stated price of $0.0000 per unit.
This amendment corrects the previously reported amount of the 2026 equity retainer grant and states that Surma beneficially owned 92,219.200 common units directly following the award as of April 30, 2026; this balance excludes any transactions after that date.
STICE J MICHAEL reported acquisition or exercise transactions in this Form 4 filing.
MPLX LP director J Michael Stice received 3028.9410 Common Units of limited partner interests on April 30, 2026 as his annual 2026 equity retainer award at a stated price of 0.0000 per unit. After this grant, he beneficially owned 56324.0950 Common Units as of that date. The amendment corrects the originally reported award size and holdings balance and indicates the transaction was not made under a Rule 10b5-1 trading plan.