DGX vs Q Comparison

Quest Diagnostics is a leading independent provider of diagnostic testing, information, and services in the US. 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.

Qnity is a specialty chemicals company created in 2025 after being spun off from DuPont. It sells chemicals and materials to the semiconductor industry, which generates the majority of sales, and also the electronics industry. Qnity specializes in materials science, including supplying key materials required to manufacture semiconductors and interconnected devices.