Quest Diagnostics Inc vs MPLX LP — how do they compare? Quest Diagnostics Inc trades at $202.28 (market cap $22.80B), while MPLX LP trades at $56.48 (market cap $57.34B). The key difference: MPLX LP is far larger — about 2.5× Quest Diagnostics Inc's market cap, and MPLX LP pays the higher dividend (7.62%). Which is the better fit depends on your goals.
| DGX | MPLX | |
|---|---|---|
Market Cap | $22.80B | $57.34B |
Sector | Health | Technology |
52-Week High | $216.02 | $59.17 |
52-Week Low | $166.42 | $47.80 |
Enterprise Value | $28.82B | $81.97B |
Dividend Yield | 1.67% | 7.62% |
Signals from Pluang's Aura AI — not financial advice
Quest Diagnostics (DGX) trades at $207.35, showing minimal daily movement with a slight decline of 0.04%. The stock maintains a bullish technical stance with recent earnings beats and analyst consensus pointing to upside potential. Recent developments include New York State approval for Haystack MRD testing and strong momentum across diagnostic channels. Revenue growth accelerated to $11.04 billion in 2025 with consistent profitability margins around 9%.
DGX presents a balanced investment case with 38% analyst buy ratings and a $227.75 price target suggesting 10% upside. The company demonstrates steady revenue growth and operational efficiency, though elevated debt levels and policy risks require monitoring. Second quarter earnings on July 23, 2026, will be crucial for validating current momentum and growth trajectory.
MPLX trades at $57.21, up 0.46% today, with a bullish technical outlook supported by moving averages and a consensus price target of $60.60. The company reported strong profitability with a 41.24% net income margin and robust cash flow from operations of $5.91B in 2025. Recent earnings showed beats in Q3 and Q4 2025 but a miss in Q1 2026, with Q2 2026 results pending. A dividend of $1.08 was declared for H1-26, reinforcing income appeal.
The stock presents a compelling value with a P/E of 12.23 and high analyst buy consensus (71.43%), though risks include earnings volatility and high debt-to-asset ratio of 90.06%. Upside is supported by stable midstream operations and Permian Basin exposure, but investors should monitor Q2 2026 earnings for growth sustainability.
Trailing returns across standard periods
Latest headlines on both assets
Quest Diagnostics is a leading independent provider of diagnostic testing, information, and services in the U.S. The company generates over 95% of its revenue through clinical testing, anatomic pathology, esoteric testing, and substance abuse testing with specimens collected at its national network of roughly 2,300 patient service centers, as well as multiple doctors offices and hospitals. The firm also runs a much smaller diagnostic solutions segment that provides clinical trials testing, risk assessment services, and information technology solutions.
Read more on DGX →MPLX LP is a Master Limited Partnership (MLP) formed by Marathon Petroleum Corporation (MPC). It is a diversified, growth-oriented company primarily engaged in the gathering, processing, and transportation of natural gas and natural gas liquids (NGLs), as well as the transportation, storage, and distribution of crude oil and refined petroleum products. MPLX owns and operates a network of midstream energy infrastructure assets, providing essential services to the energy industry across the United States.
Read more on MPLX →