Taylor Machine Works INC | Louisville | — | ◐ LIKELY ACTIVE |
| VIValmet INC | Columbus | — | ◐ LIKELY ACTIVE |
| YCYellow Creek Coating Services | Iuka | 20–99 | ◐ LIKELY ACTIVE |
| AGAzz Galvanizing Services - Moss Point | Moss Point | — | ◐ LIKELY ACTIVE |
| IEItt Engineered Valves | Amory | — | ◐ LIKELY ACTIVE |
| QSQuality Steel CORP. | Cleveland | — | ◐ LIKELY ACTIVE |
| SMSmw Mfg INC | Oxford | — | ◐ LIKELY ACTIVE |
American Tank & Vessel INC | Lucedale | — | ◇ UNVERIFIED |
| CCCalvert Company Inc, the | Richland | — | ◇ UNVERIFIED |
| CBCrown Beverage Packaging | Batesville | — | ◇ UNVERIFIED |
| GRGreat River Industries LLC | Natchez | — | ◇ UNVERIFIED |
| KMKloeckner Metals Corporation | Louisville | — | ◇ UNVERIFIED |
| MOMonotech of Mississippi | Iuka | — | ◇ UNVERIFIED |
| MCMueller Copper Fittings CO INC | Fulton | — | ◇ UNVERIFIED |
| PPPaslode Pontotoc | Pontotoc | — | ◇ UNVERIFIED |
| RARobine and Welch Machine and Tool Company INC | Laurel | — | ◇ UNVERIFIED |
| SSSamuel Son and Company (usa) INC | Iuka | — | ◇ UNVERIFIED |
| SASouth Atlantic Galvanizing | Shannon | — | ◇ UNVERIFIED |
| TPTri-state Pole & Piling, INC. | Lucedale | — | ◇ UNVERIFIED |
21 Machine and Fab LLC | Forest | — | ◐ LIKELY ACTIVE |
| JIJmsmanufacturing INC | Lucedale | — | ◐ LIKELY ACTIVE |
| SWSteel Works, LLC | Jackson | 20–99 | ◐ LIKELY ACTIVE |
| ASAttala Steel Industries LLC | Kosciusko | — | ◐ LIKELY ACTIVE |
| ESEllis Steel Company, Inc. Structural | West Point | 20–99 | ◐ LIKELY ACTIVE |
| GAGe Aviation Ellisville | Ellisville | — | ◐ LIKELY ACTIVE |
| GSGipson Steel, INC. | Meridian | 20–99 | ◐ LIKELY ACTIVE |
| HEHunter Engineering Company, Durant | Durant | — | ◐ LIKELY ACTIVE |
| HEHunter Engineering Company Raymond Plant | Raymond | 500+ | ◐ LIKELY ACTIVE |
| JPJackson Plating CO | Jackson | — | ◐ LIKELY ACTIVE |
| JCJANMP Contech Engineered Solutions LLC | Greenville | 1–19 | ◐ LIKELY ACTIVE |
| JMJwh Machining & Fab LLC | Jackson | — | ◐ LIKELY ACTIVE |
| KCKbh CORP | Clarksdale | — | ◐ LIKELY ACTIVE |
| KCKdm Custom Coatings INC | Tupelo | — | ◐ LIKELY ACTIVE |
| LMLaurel Machine and Foundry, Front Street | Laurel | 20–99 | ◐ LIKELY ACTIVE |
| OWOlin Winchester, LLC | Oxford | — | ◐ LIKELY ACTIVE |
PG Technologies - Ellisville, MS | Ellisville | 100–499 | ◐ LIKELY ACTIVE |
| PSPontotoc Spring | Pontotoc | 20–99 | ◐ LIKELY ACTIVE |
| RHRite Hite Product Corporation | Horn Lake | 100–499 | ◐ LIKELY ACTIVE |
| RIRockett INC | Flowood | — | ◐ LIKELY ACTIVE |
| SSSlay Steel INC | Meridian | 20–99 | ◐ LIKELY ACTIVE |
| SSmith+Griffin | Byhalia | 20–99 | ◐ LIKELY ACTIVE |
| SMSouthwark Metal Mississippi Division | Southaven | 100–499 | ◐ LIKELY ACTIVE |
| VTVision Technologies Marine, INC. | Pascagoula | — | ◐ LIKELY ACTIVE |
| 1A1108th Avcrad | Gulfport | — | ◐ LIKELY ACTIVE |
| APAutomatic Plating, INC. | Taylorsville | — | ◐ LIKELY ACTIVE |
| CLCroft LLC | Magnolia | — | ◐ LIKELY ACTIVE |
| PEProcess Engineering Company, INC. | Jackson | — | ◐ LIKELY ACTIVE |
| SSStructural Steel Services, Inc., Plant 6 | Meridian | — | ◐ LIKELY ACTIVE |
| SSStructural Steel Services Inc, Plants 1 | Meridian | — | ◐ LIKELY ACTIVE |
Taylor Machine Works Inc, Plant Number 3 | Louisville | — | ◐ LIKELY ACTIVE |