Exhibit 21.1

Subsidiaries of Select Energy Services, Inc.

 

 

 

Entity

    

State of Formation

SES Holdings, LLC

 

Delaware

Select Energy Services, LLC

 

Delaware

Peak Oilfield Services, LLC

 

Texas

Affirm Oilfield Services, LLC

 

Texas

Rockwater Energy Solutions, LLC

 

Delaware

Benchmark Energy Products, LLC

 

Texas

Reef Services, LLC

 

Delaware

Rockwater West TX, LLC

 

Delaware

Crescent Companies, LLC

 

Oklahoma