Mplx LP (MPLX) · Aug 24, 2026 · New debt
$2.25B senior notes — $2.25B across 2029, 2032 and 2036 maturities; priced August 10, settled August 24
MPLX formalizes a $2.25B senior-note offering priced August 10. The August 24 filing adds legal documentation, not new economics.
The financing economics were already known. The notes were priced on August 10 and scheduled to settle on August 24, so this filing lands as completion paperwork rather than a new financing surprise. The underwriting agreement is dated August 10, 2026 〔0〕.
MPLX is adding $2.25 billion of senior debt across three maturities. The published terms show $1.25 billion due 2029, plus $500 million due 2032 and $500 million due 2036, with net proceeds of approximately $2.216 billion.
| Tranche | Principal | Coupon | Maturity |
|---|---|---|---|
| Senior notes | $1.25B | 4.700% | 2029 |
| Senior notes | $0.50B | 5.000% | 2032 |
| Senior notes | $0.50B | 5.500% | 2036 |
The August 24 8-K mainly supplies the legal instruments. It files three supplemental indentures dated August 24, 2026 〔1〕 and does not add earnings, guidance, leverage targets or a new use-of-proceeds disclosure. Against a market that already knew the offering’s size and pricing, the net read is neutral.
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