Type	Name	Date
Merger agreement	Agreement and Plan of Merger, among ADA-ES, Inc., Advanced Emissions Solutions, Inc. and ADA Merger Corp	03/25/2013
Merger agreement	Agreement and Plan of Merger, among ADA-ES, Inc., Advanced Emissions Solutions, Inc. and ADA Merger Corp	03/19/2012
Merger agreement	Agreement and Plan of Merger, among ADA-ES, Inc., Advanced Emissions Solutions, Inc. and ADA Merger Corp	03/14/2011