 LOS ANGELES, June 10, 2021 PRNewswire -- The Schall Law Firm announced today that they have filed a securities class action lawsuit on behalf of plaintiff Thomas Leonard against FibroGen, Inc. FibroGen or the Company NASDAQ: FGEN and certain of its officers, which expands the class period. The class action is on behalf of a class consisting of investors who purchased or otherwise acquired FibroGen securities between October 18, 2017 and April 6, 2021, inclusive the Class Period. 