DGX vs DRI Comparison

Quest Diagnostics is a leading independent provider of diagnostic testing, information, and services in the US. The company generates over 97% of its revenue through clinical testing, anatomic pathology, esoteric testing, and substance abuse testing with specimens collected at its national network of roughly 2,400 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.

Darden Restaurants is the largest global full-service dining operator, with over $12 billion in system sales across 2,159 company-owned stores at the end of fiscal 2025, spanning the US and Canada. The firm operates 10 banners in four segments, including Olive Garden (43% of sales), LongHorn Steakhouse (25%), and fine dining (21%), which includes The Capital Grille, Ruth's Chris, and Eddie V's. The other 11% of sales comes from smaller concepts such as Yard House and Cheddar's. Darden primarily generates revenue through sales of food and beverage items at its company-owned restaurants. It also earns royalties on sales from 154 franchised locations in US and international markets, which sit within the other segment but are immaterial to consolidated results.