| SMSantel Metal Finishings & Supply | Carencro | — | ◇ UNVERIFIED |
| SPScooter's Paint Works LLC | Slidell | — | ◇ UNVERIFIED |
| SMScully's Metal Fabrication, INC. | Morgan City | — | ◇ UNVERIFIED |
| SPSemon Production Machining, Inc., Doug | Shreveport | — | ◇ UNVERIFIED |
| SISetpoint Integrated Solutions INC - Baton Rouge | Baton Rouge | — | ◇ UNVERIFIED |
| SISetpoint Integrated Solutions INC - Lake Charles Facility | Sulphur | — | ◇ UNVERIFIED |
| SISetpoint Integrated Solutions INC - Luling Facility | Luling | — | ◇ UNVERIFIED |
| SISetpoint Integrated Solutions INC - Monroe Facility | West Monroe | — | ◇ UNVERIFIED |
| SAShaw Alloy Piping Products, LLC | Houma | — | ◇ UNVERIFIED |
| SCShaw Constructors INC - Sw Region - Sulphur Facility | Sulphur | — | ◇ UNVERIFIED |
| SFShaw Fabrication & Manufacturing, INC. | Baton Rouge | — | ◇ UNVERIFIED |
| SSShaw Shreveport Shreveport Facility | Shreveport | — | ◇ UNVERIFIED |
| SSShaw Sunland Fabricators, LLC | Walker | — | ◇ UNVERIFIED |
| SMSheet Metal Specialties LLC | Monroe | — | ◇ UNVERIFIED |
| SISitemaster, INC. | Slidell | — | ◇ UNVERIFIED |
| SSSmith & Sons, LLC | Sulphur | — | ◇ UNVERIFIED |
| SOSola Operating LLC - Red River Bay Station | Shaw | — | ◇ UNVERIFIED |
| SWSol Windows and Doors S Corp, Inc. | Bossier City | — | ◇ UNVERIFIED |
| SCSouthern Carbide, INC. | Shreveport | — | ◇ UNVERIFIED |
| SCSouthern Custom Fabrication | Carencro | — | ◇ UNVERIFIED |
| SESouthern Enterprises of Southeast Louisiana, INC. | Ponchatoula | — | ◇ UNVERIFIED |
| SISouthern Industrial Mechanical Maintenance Company, LLC | Shreveport | — | ◇ UNVERIFIED |
| SVSouthern Valve Properties, LLC | Broussard | — | ◇ UNVERIFIED |
| SWSouthern Walls & Windows | New Orleans | — | ◇ UNVERIFIED |
| SFSouthland Fabricators, LLC | Walker | — | ◇ UNVERIFIED |
| SISouthland Industrial Coastings, LLC - Amite Facility | Amite | — | ◇ UNVERIFIED |
| SVSouthwest Valve, INC. | Gonzales | — | ◇ UNVERIFIED |
| SMSpecial Metal Works | Rayne | — | ◇ UNVERIFIED |
| SASpecialty Applications | Ponchatoula | — | ◇ UNVERIFIED |
| SBSpecialty Building Products, INC. | Bossier City | — | ◇ UNVERIFIED |
| SFSpecialty Frabricators and Erectors, INC. | Hammond | — | ◇ UNVERIFIED |
| SFStainless Fabricators, INC. | Belle Chasse | — | ◇ UNVERIFIED |
| SIStandard Instruments Services | Harvey | — | ◇ UNVERIFIED |
| SOState of Louisiana Military Department - Camp Minden | Doyline | — | ◇ UNVERIFIED |
| SIStreamline Industries, LLC | Jeanerette | — | ◇ UNVERIFIED |
| SBStrong Built, INC | Waterproof | — | ◇ UNVERIFIED |
| SSSulphur Sheet Metal & Fabrication, INC. | Sulphur | — | ◇ UNVERIFIED |
| SASuperheat Advancing Heat Treatment | Sulphur | — | ◇ UNVERIFIED |
| SFSuperior Fabricators INC | Baldwin | — | ◇ UNVERIFIED |
| SSSupreme Service & Specialty CO INC Thru Tubing Div | Broussard | — | ◇ UNVERIFIED |
| TITalley Iron Works, LLC | Pearl River | — | ◇ UNVERIFIED |
| TMTeche Mills, LLC | Jeanerette | — | ◇ UNVERIFIED |
| TDThe Deltak Company, INC. | Walker | — | ◇ UNVERIFIED |
| TEThe Engraving CO INC. | Metairie | — | ◇ UNVERIFIED |
| TFTiger Fabrication LLC | Saint Martinville | — | ◇ UNVERIFIED |
| TMToepfer's Mfg. & Dist. Co., INC. | Eunice | — | ◇ UNVERIFIED |
| TQTop-cor Quality Applications | Convent | — | ◇ UNVERIFIED |
| TATotal Automated Graphics, INC. | Harvey | — | ◇ UNVERIFIED |
| TCTrade Construction Company, LLC | Baton Rouge | — | ◇ UNVERIFIED |
| TMTraina Mechanical, INC. | Metairie | — | ◇ UNVERIFIED |
