Quest Diagnostics Inc vs Western Digital Corp — how do they compare? Quest Diagnostics Inc trades at $205.37 (market cap $22.80B), while Western Digital Corp trades at $563.22 (market cap $194.17B). The key difference: Western Digital Corp is far larger — about 8.5× Quest Diagnostics Inc's market cap, and Quest Diagnostics Inc pays the higher dividend (1.67%). Which is the better fit depends on your goals.
| DGX | WDC | |
|---|---|---|
Market Cap | $22.80B | $194.17B |
Sector | Health | Technology |
52-Week High | $216.02 | $746.23 |
52-Week Low | $166.42 | $66.53 |
Enterprise Value | $28.82B | $192.51B |
Dividend Yield | 1.67% | 0.11% |
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.
Western Digital (WDC) trades at $555.55, down 4.64% amid a sector-wide memory stock sell-off. The stock shows strong fundamentals with three consecutive quarterly EPS beats, a net income margin of 55.07%, and robust cash flow from operations of $1.69B in 2025. Technical indicators are bearish, with price near the pivot point of $551. Analyst sentiment remains overwhelmingly positive with a 72% buy rating and a $619.07 consensus price target, suggesting significant upside potential.
The outlook is supported by AI-driven storage demand and margin expansion, but near-term volatility from memory pricing cycles and competitive pressures poses risks. The stock's high valuation multiples require sustained earnings growth to justify further appreciation.
Trailing returns across standard periods
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 →Western Digital is a vertically integrated supplier of data storage solutions, spanning both hard disk drives and solid-state drives. In the HDD market it forms a practical duopoly with Seagate, and it is the largest global producer of NAND flash chips for SSDs in a joint venture with competitor Kioxia.
Read more on WDC →