The offering comprises $1.25 billion in 4.700% notes due 2029, $500 million in 5.000% notes due 2032, and $500 million in 5.500% notes due 2036. The company plans to allocate a portion of the proceeds to extinguish its outstanding $1.25 billion in 4.125% senior notes maturing in March 2027. This move allows the firm to manage its debt profile while retaining liquidity for infrastructure and logistics projects.

TD Securities, Goldman Sachs, J.P. Morgan, SMBC Nikko, and Wells Fargo are serving as joint book-running managers for the transaction. The sale is scheduled to close on August 24, 2026, pending standard closing conditions. MPLX, a diversified master limited partnership, operates extensive midstream assets ranging from crude oil pipelines to natural gas processing facilities across key U.S. basins.