| ASAmico - Seasafe INC | Lafayette | 20–99 | ◐ LIKELY ACTIVE |
| AGAzz Galvanizing Louisiana LLC | Port Allen | 20–99 | ◐ LIKELY ACTIVE |
| BTBlast Tech LLC | Broussard | — | ◐ LIKELY ACTIVE |
| NONational Oilwell Varco LP | Houma | 20–99 | ◐ LIKELY ACTIVE |
| PEPerformance Energy Services LLC | Houma | 500+ | ◐ LIKELY ACTIVE |
| SAShaw Alloy Piping Products INC | Shreveport | 100–499 | ◐ LIKELY ACTIVE |
| TBTwin Brothers Marine LLC | Louisa | 20–99 | ◐ LIKELY ACTIVE |
| VTVallourec Tube-alloy, LLC | Houma | 20–99 | ◐ LIKELY ACTIVE |
| AMArcosa Marine Components, LLC (plant - 1080 Dba Wintech) | Bossier City | — | ◐ LIKELY ACTIVE |
| CICameron International | Bayou Vista | — | ◐ LIKELY ACTIVE |
| DIDreyfus-cortney INC | New Orleans | 20–99 | ▲ REPORTED CLOSED |
| EPEpic Piping - Frost | Livingston | 100–499 | ◐ LIKELY ACTIVE |
| FFrymaster | Shreveport | 500+ | ◐ LIKELY ACTIVE |
| FLFrymaster LLC | Shreveport | — | ◐ LIKELY ACTIVE |
| JMJames Machine Works INC | Monroe | 100–499 | ◐ LIKELY ACTIVE |
| LSLapeyre Stair INC | Harahan | 20–99 | ◐ LIKELY ACTIVE |
| MSMueller Supply Company, Inc.* | Oak Grove | 20–99 | ◐ LIKELY ACTIVE |
| PFPearce Foundry INC | Prairieville | 20–99 | ◐ LIKELY ACTIVE |
| SMService Machine Specialties | Eunice | 20–99 | ◐ LIKELY ACTIVE |
| SLShaw Lake Charles LLC | Lake Charles | 100–499 | ◐ LIKELY ACTIVE |
| SKSunland Kori Services LLC | Eunice | 1–19 | ◐ LIKELY ACTIVE |
| CEChart Energy & Chemicals INC - Plant 1 | New Iberia | — | ◐ LIKELY ACTIVE |
| GIGulf Island LLC - Gulf Island Fabrication | Houma | — | ◐ LIKELY ACTIVE |
| 4C4-d Corrosion Control Specialists INC. | Jeanerette | — | ◇ UNVERIFIED |
Acadian Contractors INC | Abbeville | — | ◇ UNVERIFIED |
| GSGreat States Galvanizing | Zachary | — | ◇ UNVERIFIED |
| HEHunting Energy Service, INC. | Broussard | — | ◇ UNVERIFIED |
| HEHunting Energy Services INC - Schriever Facility | Schriever | — | ◇ UNVERIFIED |
| MGMillennium Galvanizing LLC | Convent | — | ◇ UNVERIFIED |
| MXModule X Solutions LLC | Shreveport | — | ◇ UNVERIFIED |
| SFSteel Fabricators of Monroe LLC | Monroe | — | ◇ UNVERIFIED |
| TITurner Industries Group LLC | Port Allen | — | ◇ UNVERIFIED |
Acme Machine and Welding, L.l.c. | Franklinton | — | ◐ LIKELY ACTIVE |
A & M Container, LLC | Ponchatoula | — | ◐ LIKELY ACTIVE |
| JMJoval Mfg CO INC | Jefferson | 20–99 | ◐ LIKELY ACTIVE |
Quality Fab & Mechanical, L.l.c | Saint Rose | — | ◐ LIKELY ACTIVE |
| LPLa Plating & Coatings LLC | Scott | — | ◇ UNVERIFIED |
| ACAir Cure Technologie | Saint Gabriel | — | ◐ LIKELY ACTIVE |
| AJA J Weller Corporation | Keithville | 20–99 | ◐ LIKELY ACTIVE |
| AWAndritz Western Pneumatics - Ruston | Ruston | 20–99 | ◐ LIKELY ACTIVE |
| BCBayou Companies LLC | New Iberia | 100–499 | ◐ LIKELY ACTIVE |
| BIBrask, INC. | Sulphur | 20–99 | ◐ LIKELY ACTIVE |
| CMCapitol Manufacturing Inc | Crowley | 100–499 | ◐ LIKELY ACTIVE |
| CACarpenter and Paterson - Waggaman | Waggaman | 100–499 | ◐ LIKELY ACTIVE |
| CICembell Industries, Inc. (Montz) | Montz | 100–499 | ◐ LIKELY ACTIVE |
| CIClement Industries INC | Minden | — | ◐ LIKELY ACTIVE |
| COCrown Oilfield Services INC - Patterson Facility | Bayou Vista | — | ◐ LIKELY ACTIVE |
| CFCustom Fabrication INC | Kenner | — | ◐ LIKELY ACTIVE |
| DDD.B. Doran Copper & Iron Works | Belle Rose | 20–99 | ◐ LIKELY ACTIVE |
| DSDeep South Fabrication, L.l.c | Harvey | — | ◐ LIKELY ACTIVE |