DGX vs TROW 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.

T. Rowe Price provides asset management services for individual and institutional investors. It offers a broad range of no-load US and international stock, hybrid, bond, and money market funds. At the end of 2025, the firm had $1.776 trillion in managed assets, composed of equity (49%), balanced (36%), fixed-income and money market (12%), and alternative (3%) offerings. Approximately two-thirds of managed assets are held in retirement-based accounts, which provides T. Rowe Price with a somewhat stickier client base than most of its peers. The firm also manages private accounts, provides retirement planning advice, and offers discount brokerage and trust services. The company is primarily a US-based asset manager, deriving less than 10% of its AUM from overseas.