Lundin Law PC, a shareholder rights firm, announces that it is investigating claims against Express Scripts Holding Company ("Express Scripts" or the "Company") (Nasdaq: ESRX) concerning possible violations of federal securities laws. To get more information about this investigation, please contact Brian Lundin, Esquire, of Lundin Law PC, at 888-713-1033, or by email at firstname.lastname@example.org. On April 24, 2017, the Company announced that it is losing its biggest customer, Anthem Inc., who claims that Express Scripts overcharged it by billions of dollars, and so Anthem will not renew its contract with the Company when it expires in 2019. Lundin Law PC was founded by Brian Lundin, a securities litigator based in Los Angeles dedicated to upholding shareholders' rights. This press release may be considered Attorney Advertising in some jurisdictions under the applicable law and ethical rules.