Cencora, formerly known as AmerisourceBergen, is one of the largest pharmaceutical distributors in the United States, buying prescription drugs from manufacturers and distributing them to pharmacies, hospitals and physician practices. Pharmaceutical distribution is a low-margin, high-volume business where scale and logistics efficiency matter enormously, since distributors typically earn only a small percentage on each drug that passes through their supply chain. The company also provides services to pharmaceutical manufacturers, including specialty drug distribution for complex, high-cost medications that require specialized handling and patient support programs. Cencora's revenue is closely tied to overall prescription drug volumes and drug pricing, and the distribution industry has consolidated over the years into a small number of large national players that handle the vast majority of pharmaceutical distribution in the country.