MPLX LP 8-K

What Happened

• MPLX LP filed an 8-K on February 12, 2026 to attach exhibits to its Form S-3 (Reg. No. 333-271922) related to note offerings. The filing includes an Underwriting Agreement dated February 5, 2026 and two supplemental indentures (the Thirty-Sixth and Thirty-Seventh Supplemental Indentures) dated February 12, 2026, along with a legal opinion from Jones Day.
• The underwriting representatives named in the agreement are Citigroup Global Markets Inc., Barclays Capital Inc., MUFG Securities Americas Inc., and RBC Capital Markets, LLC. The Trustee for the supplemental indentures is The Bank of New York Mellon Trust Company, N.A.

Key Details

• Underwriting Agreement dated: February 5, 2026.
• Supplemental Indentures dated: February 12, 2026 (Thirty-Sixth and Thirty-Seventh), each including the form of note.
• Trustee: The Bank of New York Mellon Trust Company, N.A.
• Legal opinion and consent provided by Jones Day (included as Exhibit 5.1 and 23.1).

Why It Matters

• These exhibits show MPLX has filed the legal and underwriting documentation necessary to offer debt securities under its shelf registration, a step toward issuing notes to the market.
• Investors should watch for subsequent SEC filings (e.g., pricing supplements or a prospectus supplement) that will disclose the size, terms, interest rates, and use of proceeds for any actual note issuances, since those details will affect MPLX’s capital structure and financing costs.