OMC vs DGX Comparison

Omnicom is a holding company that owns several advertising agencies and related firms. It provides traditional and digital advertising services that include creative design, market research, data analytics, ad placement, and public relations. The firm operates globally, providing services in more than 70 countries; it generates more than one half of its revenue in North America and nearly 30% in Europe.

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.