 Sawyer Manufacturing Company | Tulsa | 20–99 | ● ACTIVE |
 N & S Flame Spray, LLC | Mannford | — | ● ACTIVE |
 Sweeper Metal Fabricators CORP. | Drumright | 20–99 | ● ACTIVE |
 Isi Acquisition, LLC | Tulsa | — | ● ACTIVE |
 Pas Mro INC | Bristow | — | ● ACTIVE |
| SFSapulpa Faclty | Sapulpa | — | ◐ LIKELY ACTIVE |
| NFN&s Flamespray | Mannford | — | ◐ LIKELY ACTIVE |
| ASAcs Steel Co., LLC | Tulsa | 20–99 | ◐ LIKELY ACTIVE |
| FSFabsco Shell & Tube LLC | Sapulpa | 20–99 | ◐ LIKELY ACTIVE |
| GEGastech Engineering LLC | Sapulpa | 100–499 | ◐ LIKELY ACTIVE |
| RARolled Alloys | Tulsa | — | ◐ LIKELY ACTIVE |
| MIMadison INC / 8500 New Sapulpa Rd | Tulsa | — | ◇ UNVERIFIED |
| PPPremier Plant Services INC | Sapulpa | — | ◇ UNVERIFIED |
| PLPrescor LLC | Tulsa | — | ◇ UNVERIFIED |
| PPyrotek | Tulsa | — | ◇ UNVERIFIED |
| TEThermal Engineering International | Sapulpa | — | ◇ UNVERIFIED |
| UCUniversal Compression INC | Tulsa | — | ◇ UNVERIFIED |
| BSBlack Stripe Ammo, LLC | Sapulpa | — | ◐ LIKELY ACTIVE |
| FFFabsco Field Services, LLC. | Sapulpa | 1–19 | ◐ LIKELY ACTIVE |
| FFFabsco Fin-air, LLC. Structural | Sapulpa | 1–19 | ◐ LIKELY ACTIVE |
| OCOil Capital Coatings LLC | Sapulpa | — | ◐ LIKELY ACTIVE |
| SPSkyline Precision, LLC | Sapulpa | — | ◐ LIKELY ACTIVE |
| WPWilson Products INC | Tulsa | — | ◐ LIKELY ACTIVE |
| WAWorldwide Air Coolers | Tulsa | 20–99 | ◐ LIKELY ACTIVE |
| 3D3 D Manufacturing, INC | Sapulpa | — | ◇ UNVERIFIED |
| RFRooks Fabrication, LLC | Tulsa | — | ◇ UNVERIFIED |
| AEAbd Enterprises INC. | Sapulpa | — | ◇ UNVERIFIED |
| BWB & W Manufacturing Company | Tulsa | — | ◇ UNVERIFIED |
| CACasting and Coating, CORP. | Tulsa | — | ◇ UNVERIFIED |
| CICeo, INC. | Sapulpa | — | ◇ UNVERIFIED |
| DBDon Bateman Sheet Metal Fabrication | Sapulpa | — | ◇ UNVERIFIED |
| ECEz Carrier, LLC | Mounds | — | ◇ UNVERIFIED |
| FSFabsco Shell & Tube, LLC | Sapulpa | — | ◇ UNVERIFIED |
| HKHowco Kiefer | Kiefer | — | ◇ UNVERIFIED |
| KLKwikset Locks | Bristow | — | ◇ UNVERIFIED |
| MIMadison Industries, INC of Oklahoma | Tulsa | — | ◇ UNVERIFIED |
| MMMartin Manufactuirng, INC. | Sapulpa | — | ◇ UNVERIFIED |
| OSOklahoma Stair Craft, INC. | Sapulpa | — | ◇ UNVERIFIED |
| SMSarduccis Metal Works, INC. | Tulsa | — | ◇ UNVERIFIED |
| SCSulzer Chemtech Usa, INC. | Tulsa | — | ◇ UNVERIFIED |
| SHSun Heat Treating, Inc./sun Materials Testing | Tulsa | — | ◇ UNVERIFIED |
| TCTechnotherm CORP. | Tulsa | — | ◇ UNVERIFIED |
 Thermal Engineering International (usa), INC. a Subsidary of Babcock Power | Sapulpa | — | ◇ UNVERIFIED |
| TMT & M Fabrication, INC. | Sapulpa | — | ◇ UNVERIFIED |
| UMUlrich Machine Works LLC | Bristow | — | ◇ UNVERIFIED |
| WMWar Metals, INC. | Tulsa | — | ◇ UNVERIFIED |
