| SWSherman Wire West Plant | Sherman | TX | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| SASherwin Alumina Plant | Ingleside | TX | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| SASifco Applied Surface Concepts | Houston | TX | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| SFSigma Fasteners | Houston | TX | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| SISignal International Texas South Yard | Sabine Pass | TX | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| SPSignature Plating | Cibolo | TX | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| SSimba | Hawkins | TX | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| SSSimpson Strong Tie Mckinney Facility | Mckinney | TX | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| SMSingleton Mouldings | Breckenridge | TX | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| SCSmith Corrosion Services Incorporated | Houston | TX | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| SDSnh Denison | Denison | TX | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| SGSnyder General CORP | Hutchins | TX | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| SRSocomore - Rhome | Rhome | TX | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| SRSolid Rock Ready Mix Site | Houston | TX | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SSSony Semiconductor San Antonio | San Antonio | TX | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| SSSoriano Special Coatings | Dallas | TX | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| SLSour Lake Olefins | Sour Lake | TX | Chemical Manufacturing325000 | — | ◇ UNVERIFIED |
| SCSouth Coast Terminals Ptf | Houston | TX | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| SCSouthern Clay Products | Gonzales | TX | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| SCSouthern Cotton Oil Company | Quanah | TX | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| SFSouthern Foods Group, LLC D/b/a Southwest Ice Crea | Mc Kinney | TX | Food Manufacturing311520 | — | ◇ UNVERIFIED |
| SFSouthern Foods Group (oak Farms Dairy) | Dallas | TX | Food Manufacturing311511 | — | ◇ UNVERIFIED |
| SMSouthern Mfg Fiberglass Facility | Groves | TX | Plastics and Rubber Products Manufacturing326121 | — | ◇ UNVERIFIED |
| SUSouthern Union Gas Services LTD Emperor | Kermit | TX | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| SMSouthlake Mcr Plant | Southlake | TX | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SMSouthline Metal Products CO | Houston | TX | Fabricated Metal Product Manufacturing332439 | — | ◇ UNVERIFIED |
| STSouth Texas Chlorine, INC. | Harlingen | TX | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| SPSouthwestern Petroleum | Fort Worth | TX | Petroleum and Coal Products Manufacturing324122 | — | ◇ UNVERIFIED |
| SLSouthwest Land & Marine Greenwood Facility | Corpus Christi | TX | Petroleum and Coal Products Manufacturing324199 | — | ◇ UNVERIFIED |
| SOSouthwest Oil Recycling INC | Corpus Christi | TX | Petroleum and Coal Products Manufacturing324199 | — | ◇ UNVERIFIED |
| SPSovereign Pharmaceuticals | Fort Worth | TX | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| SPSovereign Pharmaceuticals | Fort Worth | TX | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| SESpace Exploration Technologies | Brownsville | TX | Transportation Equipment Manufacturing336414 | — | ◇ UNVERIFIED |
| SISparkman Industries Catalyst Division | Victoria | TX | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| SRSpecht Rd Rm | San Antonio | TX | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SCSpecialty Coatings CORP | Arlington | TX | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| SSSpeed & Sport Chrome Plating | Houston | TX | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| SMSpenco Medical CORP | Waco | TX | Miscellaneous Manufacturing339920 | — | ◇ UNVERIFIED |
| SASpirit Aerosystems San Antonio | San Antonio | TX | Transportation Equipment Manufacturing336413 | — | ◇ UNVERIFIED |
| SPSprint Press, INC. | Fort Worth | TX | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| SCSrm Concrete Plant 402 | Houston | TX | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SCSrm Concrete San Angelo Plant 14112 | San Angelo | TX | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SCSrw Cogeneration, L.p. | Orange | TX | Chemical Manufacturing325110 | — | ◇ UNVERIFIED |
| STSst Truck CO | Garland | TX | Transportation Equipment Manufacturing336110 | — | ◇ UNVERIFIED |
| S3Stage 3 Separation | Houston | TX | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
 Standard Industries | San Antonio | TX | Electrical Equipment, Appliance & Component Manufacturing335911 | — | ◇ UNVERIFIED |
 Standard Machine Works INC | Houston | TX | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| SCStarpak CORP | Houston | TX | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| SSteelcoast | Brownsville | TX | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| SStella-jones | Lufkin | TX | Wood Product Manufacturing321114 | — | ◇ UNVERIFIED |
