| STServa Tulsa | Catoosa | 20–99 | ◐ LIKELY ACTIVE |
| SGS & G Towing LLC | Oklahoma City | — | ◐ LIKELY ACTIVE |
| SIStarline INC | Oklahoma City | — | ▲ REPORTED CLOSED |
| SPSubmersible Pumps, Inc. (SPI) | Cushing | 20–99 | ◐ LIKELY ACTIVE |
| SSSuperior Solutions Welding & Fabrication LLC | Oklahoma City | — | ◐ LIKELY ACTIVE |
| TWT.D. Williamson - Pipeline Pigging Division | Tulsa | 20–99 | ◐ LIKELY ACTIVE |
| TTThermaClime Technologies, Inc. | Oklahoma City | 100–499 | ◐ LIKELY ACTIVE |
| TKThermo King of Tulsa, LLC | Tulsa | 20–99 | ◐ LIKELY ACTIVE |
| TNTtt Navy Americas LLC | Duncan | — | ◐ LIKELY ACTIVE |
| TTulsa | Tulsa | 20–99 | ◐ LIKELY ACTIVE |
| TLTulsa Levare US Inc | Tulsa | 20–99 | ◐ LIKELY ACTIVE |
| TMTulsa Manufacturing Plant | Tulsa | 100–499 | ◐ LIKELY ACTIVE |
| TWTulsa Winch, INC. | Jenks | — | ◐ LIKELY ACTIVE |
| VIVmi INC | Cushing | — | ◐ LIKELY ACTIVE |
| WMWw Manufacturing CO INC | Thomas | — | ◐ LIKELY ACTIVE |
| WWww | Oklahoma City | 100–499 | ◐ LIKELY ACTIVE |
| ZGZeeco Global Technology Center | Broken Arrow | 100–499 | ◐ LIKELY ACTIVE |
| ZHZeeco Headquarters | Tulsa | 100–499 | ◐ LIKELY ACTIVE |
| ZIZeeco, Inc. | Tulsa | 500+ | ◐ LIKELY ACTIVE |
| TPTrailquip Plus LLC | Checotah | — | ◐ LIKELY ACTIVE |
| ADAmerican Directional Technology, INC. | Wayne | — | ◇ UNVERIFIED |
| ABAvery Barron Industries - Fabrication, LLC | Tulsa | — | ◇ UNVERIFIED |
| MMMetro Mechanical Supply | Tulsa | — | ◇ UNVERIFIED |
 A G Equipment Company / a G Equipment Hemlock Plant | Broken Arrow | — | ◇ UNVERIFIED |
| APAir Power Systems Company | Tulsa | — | ◇ UNVERIFIED |
| ADAmerican Document Shredding LLC | Tulsa | — | ◇ UNVERIFIED |
| ATAndreae Team, INC. | Ardmore | — | ◇ UNVERIFIED |
| AMApache Machine Company, INC. | Tulsa | — | ◇ UNVERIFIED |
| ALArtificial Lift Sys Fabrication Faclty | Woodward | — | ◇ UNVERIFIED |
| BMBadger Midstream Energy LP / Hanes Compressor Site | Keyes | — | ◇ UNVERIFIED |
| BHBaker Hughes Oilfield Operations INC / Tulsa Als Amo | Tulsa | — | ◇ UNVERIFIED |
| BTBonavista Technologies Inc. | Tulsa | — | ◇ UNVERIFIED |
| BCBridge Crane Specialists, LLC | Beggs | — | ◇ UNVERIFIED |
| BCBurford CORP / Burford CORP | Maysville | — | ◇ UNVERIFIED |
| CICammond Industries | Ada | — | ◇ UNVERIFIED |
| CECimarron Energy INC / Marlow Facility | Marlow | — | ◇ UNVERIFIED |
| CECimarron Energy INC / Newcastle Facility | Newcastle | — | ◇ UNVERIFIED |
 Clear Edge Filtration | Tulsa | — | ◇ UNVERIFIED |
| CLClw, LLC | Lawton | — | ◇ UNVERIFIED |
| CSCuring System Components, INC. | Tuttle | — | ◇ UNVERIFIED |
| CECutting Edge Robotic Technologies, LLC | Kellyville | — | ◇ UNVERIFIED |
| DFDavco Fab INC. | Jennings | — | ◇ UNVERIFIED |
| DLDefi Laser Company LLC | Sapulpa | — | ◇ UNVERIFIED |
| DFDougherty Forestry Manufacturing LLC | El Reno | — | ◇ UNVERIFIED |
| DVD & V Manufacturing, INC. | Sand Springs | — | ◇ UNVERIFIED |
| ESElectric Submersible Pumps, LLC | Pauls Valley | — | ◇ UNVERIFIED |
| EIExpress Integrated Technologies | Tulsa | — | ◇ UNVERIFIED |
| FRFalcon Rigs, INC. | Cashion | — | ◇ UNVERIFIED |
| FLFinishing Line Machining | Broken Arrow | — | ◇ UNVERIFIED |
| FMFlexrig Machinery Center | Tulsa | — | ◇ UNVERIFIED |
