 Los Angeles, California--Newsfile Corp. - April 13, 2021 - The Schall Law Firm, a national shareholder rights litigation firm, announces that it is investigating claims on behalf of investors of Allergan plc Allergan or the Company NYSE: AGN for violations of the securities laws.The investigation focuses on whether Allergan issued false andor misleading statements andor failed to disclose information pertinent to investors.If you are a shareholder who suffered a loss, click here to participate.We also... 