Fabricated Pipe INC | Fernwood | 100–499 | ◐ LIKELY ACTIVE |
| GSGrenada Stamping and Assembly, INC. | Grenada | 100–499 | ◐ LIKELY ACTIVE |
Milwaukee Electric Tool CORP | Greenwood | — | ◐ LIKELY ACTIVE |
| PHParker Hannifin Corporation - Fluid Control Division | Madison | — | ◐ LIKELY ACTIVE |
Primetals Technologies USA LLC | Columbus | — | ◐ LIKELY ACTIVE |
| RHRite Hite Product Corporation | Horn Lake | 100–499 | ◐ LIKELY ACTIVE |
| SCSequa Corporation, Dba Precoat Metals | Jackson | — | ◐ LIKELY ACTIVE |
| SWSteel Works, LLC | Jackson | 20–99 | ◐ LIKELY ACTIVE |
Taylor Machine Works INC | Louisville | — | ◐ LIKELY ACTIVE |
| VIValmet INC | Columbus | — | ◐ LIKELY ACTIVE |
American Tank & Vessel INC | Lucedale | — | ◐ LIKELY ACTIVE |
| AGAzz Galvanizing Services - Moss Point | Moss Point | — | ◐ LIKELY ACTIVE |
| CCCalvert Company Inc, the | Richland | — | ◐ LIKELY ACTIVE |
| CBCrown Beverage Packaging | Batesville | — | ◐ LIKELY ACTIVE |
| GRGreat River Industries LLC | Natchez | — | ◐ LIKELY ACTIVE |
| HDHunter Douglas Inc, Tupelo Center | Shannon | — | ◐ LIKELY ACTIVE |
| IEItt Engineered Valves | Amory | — | ◐ LIKELY ACTIVE |
| KMKloeckner Metals Corporation | Louisville | — | ◐ LIKELY ACTIVE |
| MOMonotech of Mississippi | Iuka | — | ◐ LIKELY ACTIVE |
| MCMueller Copper Fittings CO INC | Fulton | — | ◐ LIKELY ACTIVE |
| PPPaslode Pontotoc | Pontotoc | — | ◐ LIKELY ACTIVE |
| QSQuality Steel CORP. | Cleveland | — | ◐ LIKELY ACTIVE |
| RARobine and Welch Machine and Tool Company INC | Laurel | — | ◐ LIKELY ACTIVE |
| SSSamuel Son and Company (usa) INC | Iuka | — | ◐ LIKELY ACTIVE |
| SMSmw Mfg INC | Oxford | — | ◐ LIKELY ACTIVE |
| SASouth Atlantic Galvanizing | Shannon | — | ◐ LIKELY ACTIVE |
| ASAttala Steel Industries LLC | Kosciusko | 1–19 | ◐ LIKELY ACTIVE |
| CIColumbia Industries LLC_Mississippi | Starkville | 20–99 | ◐ LIKELY ACTIVE |
| GSGipson Steel, INC. | Meridian | 20–99 | ◐ LIKELY ACTIVE |
| JPJackson Plating CO | Jackson | — | ◐ LIKELY ACTIVE |
| KCKbh CORP | Clarksdale | 100–499 | ◐ LIKELY ACTIVE |
| PCPlum Creek Environmental Technologies | West Point MS | 100–499 | ◐ LIKELY ACTIVE |
| SSSlay Steel INC | Meridian | 20–99 | ◐ LIKELY ACTIVE |
| MSMississippi Steel Processing, LLC | Columbus | 20–99 | ◐ LIKELY ACTIVE |
| PEProcess Engineering Company, INC. | Jackson | 1–19 | ◐ LIKELY ACTIVE |
| ISIndustrial Steel Corporation | Pearl | 1–19 | ◇ UNVERIFIED |
| MLMac LLC | Bay St. Louis | 20–99 | ◇ UNVERIFIED |
| PSPascagoula Sheet Metal Works INC | Pascagoula | 1–19 | ◇ UNVERIFIED |
| PHPrecision Heat Treating Corporation | Jackson | 1–19 | ◇ UNVERIFIED |
| RFRobertson Fabrication, INC | Greenwood | 1–19 | ◇ UNVERIFIED |
| SMSmiths Machine and Welding Company INC | Brookhaven | 20–99 | ◇ UNVERIFIED |
| SMSouthern Metals Company of Mississippi INC | Laurel | 1–19 | ◇ UNVERIFIED |
| AMAutomated Machine Products, LLC | Corinth | 1–19 | ◐ LIKELY ACTIVE |
| CWComplete Welding Solutions, INC | Lucedale | 1–19 | ◐ LIKELY ACTIVE |
| ESEllis Steel Company, Inc. Structural | West Point | 20–99 | ◐ LIKELY ACTIVE |
| HEHunter Engineering Company, Durant | Durant | — | ◐ LIKELY ACTIVE |
| HEHunter Engineering Company Raymond Plant | Raymond | 500+ | ◐ LIKELY ACTIVE |
| JCJANMP Contech Engineered Solutions LLC | Greenville | 1–19 | ◐ LIKELY ACTIVE |
| JMJwh Machining & Fab LLC | Jackson | — | ◐ LIKELY ACTIVE |
| LMLaurel Machine and Foundry, Front Street | Laurel | 20–99 | ◐ LIKELY ACTIVE |