| CMChallenge Machine and Fabrication, INC. | Humble | — | ◇ UNVERIFIED |
| CFChannelview Facility | Houston | — | ◇ UNVERIFIED |
| CICharbonneau Industries, INC. | Houston | — | ◇ UNVERIFIED |
| CHC&i Heat Treat, INC. | Park Row | — | ◇ UNVERIFIED |
| CPCircor Pipeline Engineering | Houston | — | ◇ UNVERIFIED |
| CFCleaning Facilities No 1 7 No 2 | Friendswood | — | ◇ UNVERIFIED |
| CSCmc Steel Fabricators | Houston | — | ◇ UNVERIFIED |
| CCCoastal Casting Service INC. | Houston | — | ◇ UNVERIFIED |
| CPCoflexip Products Division | Houston | — | ◇ UNVERIFIED |
| CMCommercial Metals Company | Houston | — | ◇ UNVERIFIED |
| CEControlled Enviroments, Inc. | Houston | — | ◇ UNVERIFIED |
| CSCor-pro Systems | Houston | — | ◇ UNVERIFIED |
| CTC & T Building Technologies, LLC | Cypress | — | ◇ UNVERIFIED |
| CPCustom Polish Chrome | Houston | — | ◇ UNVERIFIED |
| CTCustom Threading | Houston | — | ◇ UNVERIFIED |
| CCutco | Houston | — | ◇ UNVERIFIED |
| CPCw Precision Fabrication and Welding, INC. | Houston | — | ◇ UNVERIFIED |
| CSCw Seahorn Enterprises LTD | Houston | — | ◇ UNVERIFIED |
| DSDayton Steel Fabricators | Houston | — | ◇ UNVERIFIED |
| DMDbc Machine INC | Houston | — | ◇ UNVERIFIED |
| DPDeco Plastics, INC. | Houston | — | ◇ UNVERIFIED |
| DTDelta Trailer, INC. | Houston | — | ◇ UNVERIFIED |
| DMDiamond Metal Finishing | Houston | — | ◇ UNVERIFIED |
| DMD&j Machine Works, INC. | Houston | — | ◇ UNVERIFIED |
| DTDrilltec Technologies | Houston | — | ◇ UNVERIFIED |
| DHDT62 Holdings LLC | Houston | — | ◇ UNVERIFIED |
| DIDualco, INC | Houston | — | ◇ UNVERIFIED |
| DSDuron Systems, INC. | Houston | — | ◇ UNVERIFIED |
| DPDynamic Piping Products, LLC | Houston | — | ◇ UNVERIFIED |
| ECEcs Coating Technologies | Houston | — | ◇ UNVERIFIED |
| EMEddings Machine Company | Houston | — | ◇ UNVERIFIED |
| EWEh Wachs CO. | Houston | — | ◇ UNVERIFIED |
| EFElite Form Metal Products | Houston | — | ◇ UNVERIFIED |
| EMEllwood Machining and Welding Company, LLC | Houston | — | ◇ UNVERIFIED |
| EREtech Refrigeration INC. | Humble | — | ◇ UNVERIFIED |
| EVEverest Valve Company, INC. | Houston | — | ◇ UNVERIFIED |
| EPExper-tech Products Company, INC. | Houston | — | ◇ UNVERIFIED |
| FLFabco, LLC | Houston | — | ◇ UNVERIFIED |
| FLFasie Legacy Holdings, LLC | Houston | — | ◇ UNVERIFIED |
| FFFast Fence of Texas, CORP. | Cypress | — | ◇ UNVERIFIED |
| FFFerguson Fire & Fabrication Facility 0728 | Houston | — | ◇ UNVERIFIED |
| FKFet Katy | Katy | — | ◇ UNVERIFIED |
| FFlowserve | Deer Park | — | ◇ UNVERIFIED |
| FTFlow Tek | Houston | — | ◇ UNVERIFIED |
| FSFortitude Specialty Manufacturing, LLC | Houston | — | ◇ UNVERIFIED |
| FSFortitude Specialty Metal | Houston | — | ◇ UNVERIFIED |
| FFrameworks | Houston | — | ◇ UNVERIFIED |
| FMFrameworks Manufacturing, INC | Houston | — | ◇ UNVERIFIED |
| FMFranklin Machine & Gear | Humble | — | ◇ UNVERIFIED |
| FVFranklin Valve, LP | Houston | — | ◇ UNVERIFIED |
