<div id="readability-page-1"><div> <div> , /PRNewswire/ -- MPLX LP (NYSE: MPLX) today announced that the company's 2025 investor tax packages are now available on its website, www.mplx.com. Investors may select the &#34;Investor Data&#34; link under the Investors tab, or use the following link: https://www.taxpackagesupport.com/mplx Additionally, MPLX plans to mail tax packages beginning March 23, 2026. Questions regarding the Tax Reporting Package for the year ended Dec. 31, 2025, can be addressed by calling 1-800-232-0011 (toll free). About MPLX LP MPLX is a diversified, large-cap master limited partnership that owns and operates midstream energy infrastructure and logistics assets and provides fuels distribution services. MPLX's assets include a network of crude oil and refined product pipelines; an inland marine business; light-product terminals; storage caverns; refinery tanks, docks, loading racks, and associated piping; and crude and light-product marine terminals. The company also owns crude oil and natural gas gathering systems and pipelines as well as natural gas and NGL processing and fractionation facilities in key U.S. supply basins. More information is available at www.MPLX.com. Investor Relations Contacts: (419) 421-2071 Kristina Kazarian, Vice President Finance and Investor Relations Brian Worthington, Senior Director, Investor Relations Isaac Feeney, Director, Investor Relations Evan Heminger, Analyst, Investor Relations Media Contact: (419) 421-3577 Jamal Kheiry, Communications Manager SOURCE MPLX LP <img src="https://imageproxy.pbkrs.com/https://rt.prnewswire.com/rt.gif/query-RGF0ZUlkPTIwMjYwMzE3Jk5ld3NJdGVtSWQ9Q0wxMTc3MCZUcmFuc21pc3Npb25fSWQ9MjAyNjAzMTcwNzAwUFJfTkVXU19VU1BSX19fX19DTDExNzcw?x-oss-process=image/auto-orient,1/interlace,1/resize,w_1440,h_1440/quality,q_95/format,jpg" original-src="https://imageproxy.pbkrs.com/https://rt.prnewswire.com/rt.gif/query-RGF0ZUlkPTIwMjYwMzE3Jk5ld3NJdGVtSWQ9Q0wxMTc3MCZUcmFuc21pc3Npb25fSWQ9MjAyNjAzMTcwNzAwUFJfTkVXU19VU1BSX19fX19DTDExNzcw"/></div> </div></div>

MLPX

MPLX LP (NYSE: MPLX) has announced that its 2025 investor tax packages are now available on its website. Investors can access these packages by selecting the "Investor Data" link under the Investors tab. The company plans to mail tax packages starting March 23, 2026. For inquiries regarding the Tax Reporting Package for the year ended December 31, 2025, investors can call 1-800-232-0011. MPLX LP is a large-cap master limited partnership involved in midstream energy infrastructure and logistics.

07:00 ETMPLX LP 2025 K-1 tax packages now available on company website