| SWSouthwestern Wire Cloth, INC. | Broken Arrow | — | ◇ UNVERIFIED |
| SFSouthwest Fabricators | Hugo | — | ◇ UNVERIFIED |
| SUSouthwest United Industries, INC. | Tulsa | — | ◇ UNVERIFIED |
| SUSouthwest United Industries Incorporated | Tulsa | — | ◇ UNVERIFIED |
| SSSpecific Systems, LLC | Tulsa | — | ◇ UNVERIFIED |
| SLSportswire LLC | Langley | — | ◇ UNVERIFIED |
| SHSpx Heat Transfer INC. | Tulsa | — | ◇ UNVERIFIED |
| SAStarlite Aluminum Products INC. | Tulsa | — | ◇ UNVERIFIED |
| SMStar Machine | Tulsa | — | ◇ UNVERIFIED |
| SWSteelfab West, INC. | Durant | — | ◇ UNVERIFIED |
| SWSteelfab West INC / Steelfab Texas | Durant | — | ◇ UNVERIFIED |
| SIStraitline, INC. | Okarche | — | ◇ UNVERIFIED |
| SCSufrank Corporation | Lawton | — | ◇ UNVERIFIED |
| SCSulzer Chemtech | Tulsa | — | ◇ UNVERIFIED |
| SCSulzer Chemtech Usa, INC. | Tulsa | — | ◇ UNVERIFIED |
| SFSummertree Fence Company, INC. | Shawnee | — | ◇ UNVERIFIED |
| SHSun Heat Treating, Inc./sun Materials Testing | Tulsa | — | ◇ UNVERIFIED |
| SMSunrooms & More Design Center INC. | Oklahoma City | — | ◇ UNVERIFIED |
| SCSunspot Carports & Patio | Claremore | — | ◇ UNVERIFIED |
| SASunvair Aerospace Group INC / Mingo Aerospace | Owasso | — | ◇ UNVERIFIED |
| SFSuperior Fabrication, INC | Elk City | — | ◇ UNVERIFIED |
| SFSuperior Fabrication, INC. | Ada | — | ◇ UNVERIFIED |
| SGSuperior Grinding and Sales, INC. | Claremore | — | ◇ UNVERIFIED |
| SRSuperior Recreational Products, INC. | Mcalester | — | ◇ UNVERIFIED |
| TATabko Aluminum Products, INC. | Tulsa | — | ◇ UNVERIFIED |
| TOTango Ornamental Iron Works | Muskogee | — | ◇ UNVERIFIED |
| TATaylor and Sons Pipe and Steel | Chickasha | — | ◇ UNVERIFIED |
| TMTC Machine & Manufacturing, Inc. | Tulsa | — | ◇ UNVERIFIED |
| TCTechnotherm CORP. | Tulsa | — | ◇ UNVERIFIED |
| TDTed Davis Enterprises, INC. | Oklahoma City | — | ◇ UNVERIFIED |
| TDTed Davis Enterprises, INC. | Oklahoma City | — | ◇ UNVERIFIED |
| TETerac Equipment, LLC | Broken Arrow | — | ◇ UNVERIFIED |
| TBTerry Building CO. | Oklahoma City | — | ◇ UNVERIFIED |
| TMTexoma Millwright and Welding, INC. | Durant | — | ◇ UNVERIFIED |
| TTFirearms | Altus | — | ◇ UNVERIFIED |
| TLTft, LLC | Tulsa | — | ◇ UNVERIFIED |
| TAThe Agilis Group Dba Southern Specialties | Tulsa | — | ◇ UNVERIFIED |
| THThe Home Stake Royalty Corporation | Tulsa | — | ◇ UNVERIFIED |
| TOThe Olympic Company | Tulsa | — | ◇ UNVERIFIED |
 Thermal Engineering International (usa), INC. a Subsidary of Babcock Power | Sapulpa | — | ◇ UNVERIFIED |
 Thermal Pipe Systems, INC. | Durant | — | ◇ UNVERIFIED |
| TWThermal Windows, INC. | Tulsa | — | ◇ UNVERIFIED |
| TWThomas Wren Welding and Construction | Oklahoma City | — | ◇ UNVERIFIED |
| TMThompson Manufacturing Company INC. | Tulsa | — | ◇ UNVERIFIED |
 Thompson Metal Fab, INC. | Broken Arrow | — | ◇ UNVERIFIED |
| TMThompson's Metal Coating | Owasso | — | ◇ UNVERIFIED |
| TRTimely Rewards, LLC | Tulsa | — | ◇ UNVERIFIED |
| TITmco, INC | Wewoka | — | ◇ UNVERIFIED |
| TMT & M Fabrication, INC. | Sapulpa | — | ◇ UNVERIFIED |
| TBTMF Burnsco, LLC | Tulsa | — | ◇ UNVERIFIED |
