DGX vs QSR 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.

Restaurant Brands generates about $44 billion in system sales across more than 32,000 restaurants in over 120 markets, making it one of the largest restaurant companies globally. Its banners include Burger King (7,082 stores), Tim Hortons (4,539), Popeyes (3,520), and Firehouse Subs (1,345), concentrated in the US and Canada, with these brands also comprising 15,639 franchised international locations as of year-end 2024. The firm primarily earns revenue from franchise and property fees, supply chain sales within the Tim Hortons segment, company-operated restaurants, and advertising royalties.