Type	Name	Date
Merger agreement	Agreement and Plan of Merger, by and among Pfenex, Inc., Ligand Pharmaceuticals Incorporated and Pelican Acquisition Sub, Inc	08/11/2020
Acquisition / asset purchase agreement	Purchase and Sale Agreement, between Ligand Pharmaceuticals Incorporated and the Genaera Liquidating Trust	05/24/2010
Merger agreement	Agreement and Plan of Merger, by and among Ligand Pharmaceuticals Incorporated, Neurogen Corporation, and Neon Signal, LLC	08/24/2009