| NWNov Wilco | Marlow | OK | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| OEOilfield Equipment & Manufacturing, INC. | Shawnee | OK | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| OPO-tex Pumping, L.l.c. | Duncan | OK | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| PMPeak Machining Group, LLC | Skiatook | OK | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| PMPhelps Machine & Fabrication, INC. | Ringling | OK | Machinery Manufacturing333513 | — | ◇ UNVERIFIED |
| PBPlan B Services and Solutions, LLC | Tulsa | OK | Machinery Manufacturing333249 | — | ◇ UNVERIFIED |
| PRPollution Reduction Systems, INC. | Ardmore | OK | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| PLPremierflow, LLC | Tulsa | OK | Machinery Manufacturing333993 | — | ◇ UNVERIFIED |
| PIPRS, Inc. | Tulsa | OK | Machinery Manufacturing333519 | — | ◇ UNVERIFIED |
| RTRandall's Temperture Control Specialist INC. | Yukon | OK | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| RKRay Kinnunen | Stillwater | OK | Machinery Manufacturing333112 | — | ◇ UNVERIFIED |
| RDRed Devil, Incorporated | Pryor | OK | Machinery Manufacturing333318 | — | ◇ UNVERIFIED |
| RDRed Devil, Incorporated | Tulsa | OK | Machinery Manufacturing333318 | — | ◇ UNVERIFIED |
 Reel Power International, INC. | Oklahoma City | OK | Machinery Manufacturing333298 | — | ◇ UNVERIFIED |
| RFReplogle Farm Machinery Inc. | Coweta | OK | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| RRR & R Engineering | Broken Arrow | OK | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| SKService King Manufacturing, INC. | Stroud | OK | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| SSShawn Sutton Shavings Inc | Antlers | OK | Machinery Manufacturing333243 | — | ◇ UNVERIFIED |
| SISmdi, INC. | Oklahoma City | OK | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| SSSpecific Systems, LLC | Tulsa | OK | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| STSteel Tek | Tulsa | OK | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| SRSucker Rod Mfg | Claremore | OK | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| TCTarget Completions LLC | Broken Arrow | OK | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| TITaylor Industries LLC | Erick | OK | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| TMTci Manufacturing & Equipment Sales, INC. | Pryor | OK | Machinery Manufacturing333131 | — | ◇ UNVERIFIED |
| TITek-Fins Incorporated | Tulsa | OK | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| TATemtrol a Nortek Air Solutions Brand | Okarche | OK | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| TMTexoma Manufacturing, LLC | Durant | OK | Machinery Manufacturing333318 | — | ◇ UNVERIFIED |
| TPTriangle Pump Components, INC | Oklahoma City | OK | Machinery Manufacturing333996 | — | ◇ UNVERIFIED |
| TTTucker Techs INC | Tulsa | OK | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| TTylerDunkin | Woodward | OK | Machinery Manufacturing333243 | — | ◇ UNVERIFIED |
| UCUnit Corporation | Oklahoma City | OK | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| UTUniversal Trailer | El Reno | OK | Machinery Manufacturing333992 | — | ◇ UNVERIFIED |
| VHVanessa House Beer Company | Oklahoma City | OK | Machinery Manufacturing333241 | — | ◇ UNVERIFIED |
| WSWalter Snedeker, INC. | Chickasha | OK | Machinery Manufacturing333414 | — | ◇ UNVERIFIED |
| WMWeldco Manufacturing, LLC | Colbert | OK | Machinery Manufacturing333120 | — | ◇ UNVERIFIED |
| WEWenco Energy Corporation | Tulsa | OK | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| WIWjls, Inc., Dba Royal Vista Plastics, INC. | Tulsa | OK | Machinery Manufacturing333220 | — | ◇ UNVERIFIED |
| WSWorldwide Steel Works, INC. | Pryor | OK | Machinery Manufacturing333994 | — | ◇ UNVERIFIED |
| WTWrc Tooling Services, LLC | Shawnee | OK | Machinery Manufacturing333514 | — | ◇ UNVERIFIED |
| WMW-w Manufacturing Co., INC. | Thomas | OK | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| WPW-w Paul Scales | Comanche | OK | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
