| MIMastercraft Industries | Mount Pleasant | TX | Wood Product Manufacturing321000 | — | ◇ UNVERIFIED |
| MWMaster Woodcraft Cabinetry | Marshall | TX | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| MCMaterial Containment INC | Houston | TX | Fabricated Metal Product Manufacturing332439 | — | ◇ UNVERIFIED |
| MTMaterials Transportation | Temple | TX | Machinery Manufacturing333298 | — | ◇ UNVERIFIED |
| MTMatheson Tri-gas INC | La Porte | TX | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| MCMaximus Coffee Group | Houston | TX | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| MFMccormick Flavor Division | Irving | TX | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| MKMc Kenzie Tank Lines, INC. | Pasadena | TX | Plastics and Rubber Products Manufacturing326191 | — | ◇ UNVERIFIED |
| MPMcmaster Plating | Longview | TX | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| MSMemc Southwest INC | Sherman | TX | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| MMerichem | Houston | TX | Machinery Manufacturing333298 | — | ◇ UNVERIFIED |
| MMMesco Metal Buildings | Southlake | TX | Fabricated Metal Product Manufacturing332311 | — | ◇ UNVERIFIED |
| MPMetal Prep Houston Plant | Houston | TX | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| MHMetals House INC | Houston | TX | Machinery Manufacturing333319 | — | ◇ UNVERIFIED |
| MTMetal Touch Plating and Bumper Exchange | San Antonio | TX | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| MIMetox International | Houston | TX | Electrical Equipment, Appliance & Component Manufacturing335931 | — | ◇ UNVERIFIED |
| MBMg Building Materials | San Antonio | TX | Wood Product Manufacturing321114 | — | ◇ UNVERIFIED |
| MGMic Group | Brenham | TX | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MPMid-america Pet Food Warehouse | Mt Pleasant | TX | Food Manufacturing311111 | — | ◇ UNVERIFIED |
| MSMidland South Plant | Midland | TX | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MIMillar Instruments | Houston | TX | Computer and Electronic Product Manufacturing334519 | — | ◇ UNVERIFIED |
| MMilprint | Longview | TX | Paper Manufacturing322221 | — | ◇ UNVERIFIED |
| MIMirror Industries | Houston | TX | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| MSMission Solar Energy | San Antonio | TX | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| MWMi Windows and Doors | Carrollton | TX | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| MHMm - Helotes | Helotes | TX | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MHMm Henderson Ready Mix | Henderson | TX | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MTMm Taylor Ready Mix | Thrall | TX | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MPMomentive Performance Materials USA INC | Hurst | TX | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
| MPMorrell Plating | Dallas | TX | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| MIMorton International | Grand Saline | TX | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| MPMotheral Printing Company | Fort Worth | TX | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| MSMpower Specialty Chemicals | Brookshire | TX | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| MBMrs Bairds Bakeries Business Trust | Fort Worth | TX | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| MSM&s Systems LP a Delaware LP | Dallas | TX | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| MCMuehlstein Compounded Products | Houston | TX | Chemical Manufacturing325991 | — | ◇ UNVERIFIED |
| MPMv Port Authur Rm 1 | Port Authur | TX | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MCMw Components - Houston Fasteners | Houston | TX | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| NCNashtec Corpus Christi Plant | Gregory | TX | Primary Metal Manufacturing331313 | — | ◇ UNVERIFIED |
| NCNational Casein | Tyler | TX | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| NONational Oilwell Galena Park | Galena Park | TX | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| NONational Oilwell Varco LP | Houston | TX | Plastics and Rubber Products Manufacturing326122 | — | ◇ UNVERIFIED |
| NSNational Semiconductor | Arlington | TX | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| NGNatural Gas Odorizing, INC. | Baytown | TX | Chemical Manufacturing325110 | — | ◇ UNVERIFIED |
| NCNavasota Concrete | Navasota | TX | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| NTNeos Therapeutics | Grand Prairie | TX | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| NRNewell Recycling of San Antonio | San Antonio | TX | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| NFNhr Facility | Houston | TX | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| NINiltronix INC | Houston | TX | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| NCNoble Construction Equipment INC | Lubbock | TX | Machinery Manufacturing333120 | — | ◇ UNVERIFIED |
