- Corporate Feud Exposes Big Profits on Drug Sales Wall Street Journal by Charley Grant—The rising pressure on drug pricing has shifted to the companies that were supposed to guard against rampant increases. A dispute between two of the most important companies in the health care industry, Express Scripts Holding Co., the largest pharmacy benefit manager, and health insurance giant Anthem Inc., has shown in stark terms how profitable some relationships have become. That will give more ammunition to critics of the system. Express Scripts announced Monday that Anthem, its largest customer, is unlikely to renew its contract once it expires at the end of 2019. Anthem, which accounts for roughly one-sixth of total Express Scripts revenue, has sued the company for allegedly overcharging on prescription drugs over several years.