| CCContinental Carbon Ponca City Plant | Ponca City | 100–499 | ● ACTIVE |
| KFKoch Fertilizer Enid, LLC | Enid | 100–499 | ● ACTIVE |
Trece INC | Adair | 100–499 | ● ACTIVE |
| UOUmicore Optical Materials USA INC. | Quapaw | 20–99 | ● ACTIVE |
Dermamedics, LLC | Oklahoma City | 1–19 | ● ACTIVE |
| DCDirect Colors LLC | Shawnee | 1–19 | ● ACTIVE |
Immuno Mycologies INC | Norman | 20–99 | ● ACTIVE |
Kleen Products INC | Oklahoma City | 1–19 | ● ACTIVE |
Pd-rx Pharmaceuticals, INC. | Oklahoma City | 20–99 | ● ACTIVE |
Smc Technologies INC | Oklahoma City | — | ● ACTIVE |
United-tech INC | Tulsa | 1–19 | ● ACTIVE |
Weaver Labs LLC | Stillwater | 1–19 | ● ACTIVE |
Airgas Usa, LLC | Tulsa | — | ● ACTIVE |
| AMAmerican Medical Gas Resources LLC | Kiefer | — | ● ACTIVE |
Bio Advantage Recycling Company, LLC | Shawnee | — | ● ACTIVE |
Cherokee Composites, LLC | Claremore | — | ● ACTIVE |
Drftco Marine LLC | Broken Arrow | — | ● ACTIVE |
Dry Surface Technologies LLC | Guthrie | — | ● ACTIVE |
Fairwind, LLC | Lawton | — | ● ACTIVE |
Hla Protein Technologies INC | Oklahoma City | — | ● ACTIVE |
Knight Safety & Industrial LLC | Edmond | — | ● ACTIVE |
Red Devil, Incorporated | Tulsa | — | ● ACTIVE |
Redtail Innovations LLC | El Reno | — | ● ACTIVE |
Service Wing Organic Solutions, LLC | Tulsa | — | ● ACTIVE |
Stardust Power INC. | Oklahoma City | — | ● ACTIVE |
Valiosa LLC | Ada | — | ● ACTIVE |
Veteran Respiratory Resources, LLC. | Edmond | — | ● ACTIVE |
Vyta Supplements L.l.c. | Oklahoma City | — | ● ACTIVE |
| ARAdvance Research Chemicals INC | Catoosa | 100–499 | ◐ LIKELY ACTIVE |
| CRChemtrade Refinery Services, INC. | Tulsa | 20–99 | ◐ LIKELY ACTIVE |
| HPH-i-s Paint Manufacturing Company, LLC | Oklahoma City | 20–99 | ◐ LIKELY ACTIVE |
| MPMl Products LLC | Noble | 20–99 | ◐ LIKELY ACTIVE |
| PCPolyvision CORP | Okmulgee | 20–99 | ◐ LIKELY ACTIVE |
| WIWoodward Iodine Corporation | Woodward | 20–99 | ◐ LIKELY ACTIVE |
| MCMilamar Coatings LLC | Oklahoma City | 20–99 | ◐ LIKELY ACTIVE |
| 3T3m Technical Ceramics Quapaw, LLC | Quapaw | — | ◐ LIKELY ACTIVE |
| APAmerican Phoenix INC / American Phoenix INC | Lawton | 20–99 | ◐ LIKELY ACTIVE |
| APAvara Pharmaceutical Technologies, Inc. | Norman | 100–499 | ◐ LIKELY ACTIVE |
| BPBaker Petrolite LLC - Barnsdall, Ok | Barnsdall | — | ◐ LIKELY ACTIVE |
| DCDeepwater Chemicals, INC. | Woodward | — | ◐ LIKELY ACTIVE |
| EUEurecat US | Mc Alester | — | ◐ LIKELY ACTIVE |
| GCGemini Coatings INC | El Reno | — | ◐ LIKELY ACTIVE |
| GPGreat Plains Microbiology LLC | Oklahoma City | 1–19 | ◐ LIKELY ACTIVE |
Ifs Coatings, INC | Ardmore | 20–99 | ◐ LIKELY ACTIVE |
| JSJupiter Sulphur LLC | Ponca City | — | ◐ LIKELY ACTIVE |
Moon Chemical Products CO | Oklahoma City | 20–99 | ◐ LIKELY ACTIVE |
| OCOklahoma City Site | Yukon | — | ◐ LIKELY ACTIVE |
| PCPryor Chem CO | Pryor | — | ◐ LIKELY ACTIVE |
| RVRiver Valley | Panama | — | ◐ LIKELY ACTIVE |
| STSpectrum Tracer Services | Tulsa | — | ◐ LIKELY ACTIVE |