MPLX LP
NYSE: MPLX · ENERGY · OIL & GAS MIDSTREAM
Updated 2026-04-29
MPLX LP (MPLX) Stock Valuation Analysis
Fair value estimate, historical valuation range, and quality signals for MPLX.
Valued
Valuation reasonably reflects current fundamentals. Limited margin of safety at these levels.
MPLX historical valuation range
Where current P/E sits in MPLX's own 5Y range.
MPLX intrinsic value (DCF)
DCF-based fair value estimate vs current market price.
Intrinsic value calculated using discounted cash flow (DCF) model based on projected free cash flows, discount rate, and terminal growth assumptions. A positive margin of safety indicates the current price is below estimated fair value, providing a cushion against estimation error.
MPLX valuation signals
Quick-read green flags, caution flags, and risks based on current metrics.
P/E Ratio — History
Current: 11.48x
P/S Ratio — History
Current: 4.75x
Is MPLX overvalued in 2026?
MPLX LP (MPLX) currently trades at $55.52 per share with a market capitalization of $56,181,408,000.00. Based on our multi-factor framework, the stock trades at a fair valuation with a Smart Value Score of 60/100. This score blends growth quality, financial health, and price attractiveness into a single institutional-grade read.
The stock trades at a P/E ratio of 11.5x, above its 5-year median of 10.7x. The PEG ratio of 3.18 indicates the price has run ahead of the underlying growth rate.
Looking at its own history, MPLX is currently trading more expensive than 76% of the last 5Y on P/E. This places it in the 76th percentile of its historical range, a zone where forward returns have typically been muted.
Our discounted cash flow model estimates MPLX's intrinsic value at $49.85 per share, against the current market price of $55.52. This implies a premium to fair value of -11.74%. The current price sits well above what projected cash flows justify, implying investors are paying for growth that has not yet materialized.
Financial quality is a concern. The Piotroski F-Score of 2/9 flags weakening fundamentals that deserve closer scrutiny before the valuation case can be fully trusted.
Bottom line: MPLX trades at a fair valuation on our framework, with a Smart Value Score of 60/100. The valuation is defensible but offers no obvious bargain. Patience or a better entry price may reward disciplined buyers.
Frequently asked questions
Is MPLX overvalued in 2026?
Based on a Smart Value Score of 60/100, MPLX is fairly valued. Price reasonably reflects current fundamentals with limited cushion in either direction.
What is MPLX's fair value?
Our DCF model estimates MPLX's intrinsic value at $49.85 per share, versus the current price of $55.52. This produces a margin of safety of -11.74%.
What P/E ratio does MPLX trade at?
MPLX trades at a P/E of 11.5x on trailing twelve-month earnings, compared to its 5-year median of 10.7x.
Is MPLX a buy based on valuation?
WallStSmart does not issue buy or sell recommendations. Our Smart Value Score of 60/100 reflects the combined read on growth, quality, and price. The profile is balanced. Best suited for investors with an existing thesis.
How does MPLX's valuation compare to its history?
On P/E, MPLX currently sits in the 76th percentile of its own 5Y range. That is historically expensive relative to where it has traded over the period.
What is MPLX's Smart Value Score?
MPLX's Smart Value Score is 60/100. The Smart Value Score is a proprietary WallStSmart metric blending growth quality, financial health, and valuation attractiveness into a single 0-100 read. Scores above 75 are rare and indicate strong multi-factor alignment.