Name

State of Organization

Parent

Youchange, Inc.

Arizona

Quest Resource Holding Corporation

Quest Resource Management Group, LLC

Delaware

Quest Sustainability Services, Inc.

Global Alerts, LLC

Delaware

Quest Sustainability Services, Inc.

Quest Equipment, LLC (formerly known as Landfill Diversion Innovations, LLC)

Delaware

Quest Resource Management Group, LLC

Quest Vertigent Corporation

Nevada

Quest Resource Holding Corporation

Quest Vertigent One, LLC

Delaware

Quest Vertigent Corporation

Quest Sustainability Services, Inc. (formerly

   known as Earth911, Inc.)

Delaware

Quest Resource Holding Corporation