 NEW YORK, June 9, 2021 PRNewswire -- WHY: Rosen Law Firm, a global investor rights law firm, reminds purchasers of the securities of FibroGen, Inc. NASDAQ: FGEN between October 18, 2017 and April 6, 2021, inclusive the Class Period, of the important June 11, 2021 lead plaintiff deadline. SO WHAT: If you purchased FibroGen securities during the Class Period you may be entitled to compensation without payment of any out of pocket fees or costs through a contingency fee arrangement. 