Quest Diagnostics Inc vs MPLX LP — how do they compare? Quest Diagnostics Inc trades at $237.51 (market cap $26.21B), while MPLX LP trades at $59.62 (market cap $60.12B). The key difference: MPLX LP is far larger — about 2.3× Quest Diagnostics Inc's market cap, and MPLX LP pays the higher dividend (7.26%). Which is the better fit depends on your goals.
| DGX | MPLX | |
|---|---|---|
Market Cap | $26.21B | $60.12B |
Sector | Health | Technology |
52-Week High | $238.50 | $60.51 |
52-Week Low | $173.49 | $47.80 |
Enterprise Value | $31.97B | $85.22B |
Dividend Yield | 1.45% | 7.26% |
Signals from Pluang's Aura AI — not financial advice
Quest Diagnostics (DGX) trades at $237.24, down 0.16% on the day, with a bullish technical signal from moving averages. The company reported strong Q2 2026 earnings, beating estimates with EPS of $3.12 and raising its full-year outlook, driven by robust testing demand. Revenue grew to $11.04B in 2025, with net income of $992M, though margins face pressure from lower-margin deals and rising costs.
The outlook is positive due to raised guidance and AI integration enhancing efficiency, but risks include debt levels and margin compression. Analysts maintain a cautious buy stance with a $249.50 price target, indicating modest upside potential from current levels amid competitive and cost challenges.
MPLX trades at $59.76, up 1.81% with a bullish technical outlook. The stock shows strong profitability with a 40.45% net income margin and a P/E of 12.75. Recent Q2 2026 earnings missed expectations, but revenue grew to $11.7B in 2026. The company announced a $2.25 billion senior notes offering on August 10, 2026, to fund growth projects, supporting its fee-based infrastructure model.
Outlook is positive with a consensus price target of $61.50, though risks include rising capital spending and leverage. The dividend yield remains attractive, with a $1.08 distribution declared for H2-2026. Investors should weigh solid cash flow against execution risks in expansion initiatives.
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 →