| JLJ & L Sheet Metal Company INC. | Houston | — | ◇ UNVERIFIED |
| JVJohn Voss Plating | Houston | — | ◇ UNVERIFIED |
| JUJpf Ultrasonic Technologies, INC. | Houston | — | ◇ UNVERIFIED |
| JIJv Industrial La Porte | La Porte | — | ◇ UNVERIFIED |
| KIKapesi Investments LLC | Spring | — | ◇ UNVERIFIED |
| KCKimHoward Corporation | Houston | — | ◇ UNVERIFIED |
 Kmec Engineering & Conveying Systems LLC | Houston | — | ◇ UNVERIFIED |
| KKnust-sbo | Houston | — | ◇ UNVERIFIED |
| KIKolimetics, INC | Houston | — | ◇ UNVERIFIED |
| KEKswc Engineering & Machining | Houston | — | ◇ UNVERIFIED |
| KVK V Weld, INC. | Baytown | — | ◇ UNVERIFIED |
| LCLangham Creek Machine Work, INC. | Houston | — | ◇ UNVERIFIED |
| LHLark Heat Treating | Houston | — | ◇ UNVERIFIED |
| LMLODA Mud Motor Bearings Inc. | Houston | — | ◇ UNVERIFIED |
| LPLogik Precision, INC. | Houston | — | ◇ UNVERIFIED |
| LSLone Star Pipe Services | Houston | — | ◇ UNVERIFIED |
| MLMadewell, LLC | Houston | — | ◇ UNVERIFIED |
| MMMajor Metals, INC. | Houston | — | ◇ UNVERIFIED |
| MSMammoth Solutions, LLC | Houston | — | ◇ UNVERIFIED |
| MUManpowergroup US INC. | Channelview | — | ◇ UNVERIFIED |
| MMarino/ware | Pasadena | — | ◇ UNVERIFIED |
| MFMaster Flo Valve Usa, INC. | Houston | — | ◇ UNVERIFIED |
| MMMaster Machine, INC. | Houston | — | ◇ UNVERIFIED |
| MRMechanical Repair & Engineering, L.p. | La Porte | — | ◇ UNVERIFIED |
| MCMetal Concepts LLC | Cypress | — | ◇ UNVERIFIED |
| MIMetal Improvement | Houston | — | ◇ UNVERIFIED |
| MIMetfab, INC. | Houston | — | ◇ UNVERIFIED |
| MRMike Ray Manufacturing, INC. | Spring | — | ◇ UNVERIFIED |
| MMMitchell Manufacturing, INC. | Tomball | — | ◇ UNVERIFIED |
| MModucoatings | Houston | — | ◇ UNVERIFIED |
| MSModular Steel Structures | Houston | — | ◇ UNVERIFIED |
| MPMorgan Performance | Spring | — | ◇ UNVERIFIED |
| MFM&p Flange & Pipe Protection | Houston | — | ◇ UNVERIFIED |
| MPM Power Machining, LLC | Houston | — | ◇ UNVERIFIED |
| MWMr. Washerman | Houston | — | ◇ UNVERIFIED |
| MBMsd Building Corporation | Houston | — | ◇ UNVERIFIED |
| MGMt Geo-tech Tools, LLC | Houston | — | ◇ UNVERIFIED |
| MIMw Industries, INC. | Houston | — | ◇ UNVERIFIED |
| MIMw Industries, INC. | Houston | — | ◇ UNVERIFIED |
| NINailor Industries Houston Facility | Houston | — | ◇ UNVERIFIED |
| NSNational Steel Products CO | Houston | — | ◇ UNVERIFIED |
| NIN-fab, INC. | Houston | — | ◇ UNVERIFIED |
| NINitretex Ii | Houston | — | ◇ UNVERIFIED |
| NANorth American Galvanizing CO Fairbanks | Houston | — | ◇ UNVERIFIED |
| NHNorth Houston Machine, INC. | Tomball | — | ◇ UNVERIFIED |
| NMNpn Machine Tools | Houston | — | ◇ UNVERIFIED |
| OWO'brien Wire Products of Texas, INC. | Houston | — | ◇ UNVERIFIED |
| OIOdyssey Industrial Systems, LLC | Houston | — | ◇ UNVERIFIED |
| OTOmk Tube Miller Rd 2 | Houston | — | ◇ UNVERIFIED |
| OPOmni Precision | Houston | — | ◇ UNVERIFIED |
