| APAccent Packing INC | Spring | — | ◇ UNVERIFIED |
| ALAcme Ladders | Houston | — | ◇ UNVERIFIED |
| APAdvanced Powder Solutions | Houston | — | ◇ UNVERIFIED |
| AEAfglobal Emmett Road | Houston | — | ◇ UNVERIFIED |
| AMAkers Metal Polishing Plating & Repair | Houston | — | ◇ UNVERIFIED |
| ALAlfa Laval Houston | Houston | — | ◇ UNVERIFIED |
| ALAlfa Laval, INC. | Houston | — | ◇ UNVERIFIED |
| ASAlloy & Stainless Fasteners | Houston | — | ◇ UNVERIFIED |
| ASAll-rite Sheet Metal, INC. | Houston | — | ◇ UNVERIFIED |
| AFAllspec Fasteners Incorporated | Houston | — | ◇ UNVERIFIED |
| ASAll Star Threading | Crosby | — | ◇ UNVERIFIED |
| ATAll Tex Staffing & Personnel, INC. | Channelview | — | ◇ UNVERIFIED |
| ABAmerican Block Company | Houston | — | ◇ UNVERIFIED |
| ABAmerican Builders & Contractors Supply Co., INC | Houston | — | ◇ UNVERIFIED |
| ARAmerican Roller Company, LLC | Houston | — | ◇ UNVERIFIED |
| ASAmerican Sheet Metal | Houston | — | ◇ UNVERIFIED |
| AAmogy | Houston | — | ◇ UNVERIFIED |
| AIAnchor Industrial Services, LLC | Houston | — | ◇ UNVERIFIED |
| AFAndrews Fabrication, INC. | Houston | — | ◇ UNVERIFIED |
| AMArevalo Manufacturing, INC. | Houston | — | ◇ UNVERIFIED |
| ACArray Coating Technology, LLC | Houston | — | ◇ UNVERIFIED |
 Associated Steel Fabricators, INC. | Houston | — | ◇ UNVERIFIED |
| APAtlas Paint | Houston | — | ◇ UNVERIFIED |
| AIAztec Industries, INC. | Humble | — | ◇ UNVERIFIED |
| BGBah Group, INC. | Pasadena | — | ◇ UNVERIFIED |
| BBB & B Insulation CO INC | Houston | — | ◇ UNVERIFIED |
| BIBendco INC. | Pasadena | — | ◇ UNVERIFIED |
| BSBest Steel Buildings, INC. | Houston | — | ◇ UNVERIFIED |
| BBBetter Burglar Bars INC. | Houston | — | ◇ UNVERIFIED |
| BPBhm Pipe & Supply, INC | Crosby | — | ◇ UNVERIFIED |
| BSBlue Spruce Investments, LLC (EPC) and Deephole Solutions, Inc. (OC) | Houston | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing | Houston | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing - Hays | Houston | — | ◇ UNVERIFIED |
| BTBoiler Tube CO of America | La Porte | — | ◇ UNVERIFIED |
| BCBray Commercial | Houston | — | ◇ UNVERIFIED |
| BSBray Sales Dba Amresist | Houston | — | ◇ UNVERIFIED |
| BMBreaux Machine Works LP | Tomball | — | ◇ UNVERIFIED |
| BMBrw Metal Industries | Houston | — | ◇ UNVERIFIED |
| BMBrw Metal Industries, LLC | Houston | — | ◇ UNVERIFIED |
| BBBurbank Barrel & Drum INC | Houston | — | ◇ UNVERIFIED |
| BCBventura CORP. | Pasadena | — | ◇ UNVERIFIED |
| BGB-w Grinding Services | Houston | — | ◇ UNVERIFIED |
| CSCampo Sheet Metal Works, INC. | Houston | — | ◇ UNVERIFIED |
| CCCapital Cartridge | Houston | — | ◇ UNVERIFIED |
| CMCapitol Manufacturing CO | Houston | — | ◇ UNVERIFIED |
| CFCardinal Fastener, a Division of Fastenal Manufact | Houston | — | ◇ UNVERIFIED |
| CCCentury Corrosion Technologies | Houston | — | ◇ UNVERIFIED |
| CICentury Instrument & Machine Co., INC. | Houston | — | ◇ UNVERIFIED |
| CICerti-fab Industries, INC. | Crosby | — | ◇ UNVERIFIED |
| CPCertified Pipe Service Houston | Baytown | — | ◇ UNVERIFIED |
