| CACaulking and Sealant Mfg Pryor Ind Park | Pryor | OK | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
| CPCavett Portable Buildings | Ponca City | OK | Fabricated Metal Product Manufacturing332311 | — | ◇ UNVERIFIED |
| CNCellofoam North America INC. | Sallisaw | OK | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| CNCellofoam North America, INC. | Sallisaw | OK | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| CSCentral Sheet Metal, LLC | Seminole | OK | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| CSCentury Steps INC. | Muskogee | OK | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| CICeo, INC. | Sapulpa | OK | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| CMCerified Machine & Design, INC. | Oklahoma City | OK | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| CPCermak Products, INC. | Oklahoma City | OK | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| COChampion Opco, LLC | Oklahoma City | OK | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| CCCharlotte Carpenter | Owasso | OK | Fabricated Metal Product Manufacturing332992 | — | ◇ UNVERIFIED |
| CHC H D LLC | Oklahoma City | OK | Fabricated Metal Product Manufacturing332211 | — | ◇ UNVERIFIED |
| CRChef's Requested Foods INC. | Oklahoma City | OK | Food Manufacturing311612 | — | ◇ UNVERIFIED |
| CJChepo's Jr Bakery & Snacks LLC | Moore | OK | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| CJChepo's Jr Bakery & Snacks LLC | Oklahoma City | OK | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| CACherokee Architectural Metals | Broken Arrow | OK | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
 Cherokee Nation Red Wing, LLC | Tulsa | OK | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| CEChickasaw Energy Solutions | Marietta | OK | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| CMChickasha Manufacturing | Chickasha | OK | Fabricated Metal Product Manufacturing332311 | — | ◇ UNVERIFIED |
| CTChisholm Trail Metal Works, LLC | Ninnekah | OK | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| CSChoctaw Soldiers Industries, INC. | Tulsa | OK | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| CECimarron Energy INC / Marlow Facility | Marlow | OK | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| CECimarron Energy INC / Newcastle Facility | Newcastle | OK | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| CLCinnamimi99, LLC | Oklahoma City | OK | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| CWCisper Welding, INC. | Wynnewood | OK | Chemical Manufacturing325110 | — | ◇ UNVERIFIED |
| CCititrends | Roland | OK | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| CCClarity Coffee Roasters LLC | Oklahoma City | OK | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| CNClaude Neon Federal Sign, INC. | Tulsa | OK | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| CNClaude Neon Federal Signs | Tulsa | OK | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
 Clear Edge Filtration | Tulsa | OK | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| CMCline Machine, INC. | Tulsa | OK | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| CLClw, LLC | Lawton | OK | Machinery Manufacturing333241 | — | ◇ UNVERIFIED |
| CPCmc Post Oklahoma LLC CO Commercial Met / Cmc Southern Post Durant | Durant | OK | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| CRCmc Rebar - Muskogee | Muskogee | OK | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| CCCoal Creek Holdings, LLC | Oklahoma City | OK | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| CECoastal Energy Corporation / Coastal Energy Corporation | Clinton | OK | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| CTCold Trap LLC | Coleman | OK | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| CSComponent Services Limited Partnership | Oklahoma City | OK | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| CPConcrete Products INC. | Oklahoma City | OK | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| CCContemporary Cabinets, INC | Edmond | OK | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| CIContinental Industries | Tulsa | OK | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| CTCooling Tower Composites and Fabricatio / Cooling Tower Composites | Chickasha | OK | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| CCCooper Creek Manufacturing Inc. | Loyal | OK | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CMCopeland Manufacturing Corporation | Tulsa | OK | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| CFCopy Fast | Oklahoma City | OK | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| CECordova Enterprises, LLC | Owasso | OK | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| CECorsair Enterprises INC. | Stillwater | OK | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| CPCortrol Process Systems, INC. | Tulsa | OK | Plastics and Rubber Products Manufacturing326122 | — | ◇ UNVERIFIED |
| CICounter Intelligence, INC. | Lawton | OK | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| CPCowan Priting & Litho, INC. | Bethany | OK | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
