The company released the updated documentation on its investor relations website, directing unitholders to the dedicated tax package support platform. While most investors will not require these detailed disclosures, they remain necessary for foreign unitholders, those calculating foreign tax credits, and specific corporate or partnership entities. MPLX advises these individuals to review the data against federal reporting requirements or consult a tax professional to ensure accurate filing.

MPLX will not send physical copies of the K-3 packages to investors. Those unable to access the documents online or requiring electronic delivery can request assistance by calling 1-800-232-0011. The Findlay-based master limited partnership operates an extensive network of midstream energy infrastructure, including crude oil and natural gas gathering systems, pipelines, and processing facilities across major U.S. supply basins.