As of March 2026 MPLX has a market cap of NZ$99.83 Billion. This makes MPLX the world's 391th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Mar 10th, 2026 the market cap of MPLX was reported to be: