| Name | Jurisdiction | ||||
| Compressco, Inc. | Delaware | ||||
| Compressco Testing, L.L.C. | Oklahoma | ||||
| Compressco Field Services, LLC | Oklahoma | ||||
| TETRA Applied Holding Company | Delaware | ||||
TETRA Arkansas Project LLC | Delaware | ||||
TETRA Arkansas Holdco I LLC | Delaware | ||||
TETRA Arkansas Holdco II LLC | Delaware | ||||
| TETRA Brine Leaseco LLC | Delaware | ||||
| TETRA Bromine Project LLC | Delaware | ||||
| TETRA Evergreen Unit LLC | Delaware | ||||
| TETRA Production Testing Holding LLC | Delaware | ||||
| T-Production Testing, LLC | Texas | ||||
| TETRA Production Testing Services, LLC | Delaware | ||||
| TETRA Financial Services, Inc. | Delaware | ||||
| TETRA-Hamilton Frac Water Services, LLC | Oklahoma | ||||
| TETRA International Incorporated | Delaware | ||||
| TETRA Middle East for Oil & Gas Services LLC | Saudi Arabia | ||||
| TETRA de Argentina SRL | Argentina | ||||
| TETRA Foreign Investments, LLC | Delaware | ||||
| TETRA International Holdings, B.V. | Netherlands | ||||
| T-International Holdings C.V. | Netherlands | ||||
| TETRA Netherlands, B.V. | Netherlands | ||||
| TETRA Oilfield Services Ghana Limited | Ghana | ||||
| TETRA Oilfield Services (Holding) Limited | Ghana | ||||
| TETRA Chemicals Europe AB | Sweden | ||||
| TETRA Chemicals Europe OY | Finland | ||||
| TETRA Egypt (LLC) | Egypt | ||||
| TNBV Oilfield Services Ltd. | British Virgin Islands | ||||
| Well TETRA for Oil Services LLC | Iraq | ||||
| TETRA Investments Company U.K. Limited | United Kingdom | ||||
| Optima Solutions Holdings Limited | United Kingdom | ||||
| Optima Solutions U.K. Limited | United Kingdom | ||||
| TETRA Technologies de Mexico, S.A. de C.V. | Mexico | ||||
| TETRA Technologies do Brasil, Limitada | Brazil | ||||
| TETRA Technologies U.K. Limited | United Kingdom | ||||
| Optima Solutions Malaysia SDN BHD | Malaysia | ||||
| TETRA Technologies Nigeria Limited | Nigeria | ||||
| Tetra-Medit Oil Services | Libya | ||||
| TETRA Madeira, Unipessoal Lda | Portugal | ||||
| TETRA (Thailand) Limited | Thailand | ||||
| TETRA Yemen for Oilfield Services Co., Ltd. | Yemen | ||||
| Greywolf Energy Services Ltd. | Canada | ||||
| TETRA International Holdings Inc. | Delaware | ||||
| TETRA UK Holdings Limited | United Kingdom | ||||
| TETRA Process Services, L.C. | Texas | ||||
| TETRA Micronutrients, Inc. | Texas | ||||