SHAREHOLDER ALERT: WeissLaw LLP Investigates Pfenex, Inc. PR Newswire NEW YORK, Aug. 11, 2020 NEW YORK , Aug. 11, 2020 /PRNewswire/ -- WeissLaw LLP is investigating possible breaches of fiduciary duty and other violations of law by the board of directors of Pfenex, Inc. ("PFNX" or the "Company") (NYSE American: PFNX) in connection with the proposed acquisition of the Company by Ligand Pharmaceuticals Incorporated ("Ligand") (NASDAQ: LGND). Under the terms of the acquisition agreement, which is...