EX-21.1 4 dxpe201210k_ex21-1.htm SUBSIDIARIES

Exhibit 21.1
SUBSIDIARIES OF THE COMPANY
PMI Operating Company, Ltd., a Texas limited partnership
PMI Investment, LLC, a Delaware limited liability corporation
Pump – PMI LLC, a Texas limited liability corporation
Vertex Corporate Holdings, Inc., a Delaware corporation
Pawtucket Holdings, Inc., a Delaware corporation
PFI, LLC, a Rhode Island limited liability company
DXP Energy Services, LLC, a Texas limited liability corporation
DXP Canada Enterprises, Ltd., a British Columbia Corporation
HSE Integrated, Ltd,, an Alberta Corporation
Industrial Paramedic Services, Ltd., and Alberta Corporation