| CCContinental Carbon Ponca City Plant | Ponca City | OK | Chemical Manufacturing325180 | 100-499 | ● ACTIVE |
| KFKoch Fertilizer Enid, LLC | Enid | OK | Chemical Manufacturing325311 | 100-499 | ● ACTIVE |
Trece INC | Adair | OK | Chemical Manufacturing325320 | 100-499 | ● ACTIVE |
| ARAdvance Research Chemicals INC | Catoosa | OK | Chemical Manufacturing325180 | 100-499 | ◐ LIKELY ACTIVE |
| APAvara Pharmaceutical Technologies, Inc. | Norman | OK | Chemical Manufacturing325412 | 100-499 | ◐ LIKELY ACTIVE |
| CBCytovance Biologics | Oklahoma City | OK | Chemical Manufacturing325414 | 100-499 | ◐ LIKELY ACTIVE |
| GIGemini Industries, Inc. El Reno | El Reno | OK | Chemical Manufacturing325510 | 100-499 | ◐ LIKELY ACTIVE |
| CICF Industries | Verdigris | OK | Chemical Manufacturing325311 | 100-499 | ◐ LIKELY ACTIVE |
| CACirculus Ardmore, PBLLC | Ardmore | OK | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| ICInterplastic Corporation Pryor OK | Pryor | OK | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| TITerra International LLC. | Woodward, OK | OK | Chemical Manufacturing325311 | 100-499 | ◐ LIKELY ACTIVE |
| UGUS Gypsum Southard | Southard | OK | Chemical Manufacturing325520 | 100-499 | ◐ LIKELY ACTIVE |