| SPStp Products Manufacturing Company | Vandalia | — | ◐ LIKELY ACTIVE |
 Sun Chemical | Cincinnati | — | ◐ LIKELY ACTIVE |
| TPThe Proctor and Gamble Company | Cincinnati | 20–99 | ◐ LIKELY ACTIVE |
| TSTrinity Specialty Compounding INC | West Unity | — | ◐ LIKELY ACTIVE |
| WHWampum Hardware CO. | Salesville | — | ◐ LIKELY ACTIVE |
| 3C3m CO Grove City Ac&s | Grove City | — | ◇ UNVERIFIED |
| 3E3m Elyria | Elyria | — | ◇ UNVERIFIED |
| AGAga Gas INC | Twinsburg | — | ◇ UNVERIFIED |
| ARAgg Rok Materials, Div of W.s.g. | Columbus | — | ◇ UNVERIFIED |
| AUAirgas USA LLC - Canton Asu | Canton | — | ◇ UNVERIFIED |
| ALAir Liquide America CORP Oregon Cdx * | Oregon | — | ◇ UNVERIFIED |
| APAir Plastics INC. | Mason | — | ◇ UNVERIFIED |
| APAir Products, Middletown,oh | Middletown | — | ◇ UNVERIFIED |
| ANAkzo Nobel Coatings, INC. | Springfield | — | ◇ UNVERIFIED |
| AAlchem | Mentor | — | ◇ UNVERIFIED |
| AIAlkermes INC | Wilmington | — | ◇ UNVERIFIED |
| ACAllied Chemical & Ironton Coke | Ironton | — | ◇ UNVERIFIED |
| AAmcor | Medina | — | ◇ UNVERIFIED |
| AFAmerican Future Fuels Facility | Lima | — | ◇ UNVERIFIED |
| AJAndrew Jergens CO | Cincinnati | — | ◇ UNVERIFIED |
| APArvesta Perry Plant | Perry | — | ◇ UNVERIFIED |
| ASA Schulman INC | Stryker | — | ◇ UNVERIFIED |
| ASA Schulman INC Specialty Compounding Div | Sharon Center | — | ◇ UNVERIFIED |
| ACAsk Chemicals LP | Cuyahoga Heights | — | ◇ UNVERIFIED |
| AAAvient Advanced Dispersions | Massillon | — | ◇ UNVERIFIED |
| BCBasf Corporation | Cleveland | — | ◇ UNVERIFIED |
| BTBasf Toda America LLC (0247042020) | Elyria | — | ◇ UNVERIFIED |
| BCBetco CORP | Toledo | — | ◇ UNVERIFIED |
| BCBondo/mar-hyde CORP * | Cincinnati | — | ◇ UNVERIFIED |
| CMCansto Manufacturers of Coatings | Cleveland | — | ◇ UNVERIFIED |
| C4Cbi 4800 | Independence | — | ◇ UNVERIFIED |
| CLChemtrade Logistics INC * | Cleveland | — | ◇ UNVERIFIED |
| CPChester Packaging, LLC | Cincinnati | — | ◇ UNVERIFIED |
| CLChristen & Laudon- Aep Fgd Project | Tiltonsville | — | ◇ UNVERIFIED |
| CICintech Industrial Coatings | Cincinnati | — | ◇ UNVERIFIED |
| CHClestra Hauserman INC. Div. of Steelcase | Solon | — | ◇ UNVERIFIED |
| CCCleveland Central Enterprises | Cleveland | — | ◇ UNVERIFIED |
| CPClorox Product Manufacturing CO. | Cleveland | — | ◇ UNVERIFIED |
| CRColor Resolutions Intl | Cincinnati | — | ◇ UNVERIFIED |
| CPContinental Products CO | Cleveland | — | ◇ UNVERIFIED |
| CCCore Composites Cincinnati, LLC (1413020248) | Batavia | — | ◇ UNVERIFIED |
| CLCovestro LLC (0145020221) | Hebron | — | ◇ UNVERIFIED |
| CCCp Chemicals Group LP | Wickliffe | — | ◇ UNVERIFIED |
| CRCrest Rubber Company | Ravenna | — | ◇ UNVERIFIED |
| CICustom-pak, INC. | Cleveland | — | ◇ UNVERIFIED |
| CICustompak INC | Medina | — | ◇ UNVERIFIED |
| DIDacar Industries INC | East Liverpool | — | ◇ UNVERIFIED |
| DIDap INC | Dayton | — | ◇ UNVERIFIED |
| DEDavid E Easterday and CO INC | Wilmot | 20–99 | ◇ UNVERIFIED |
| DFDeerfield Farms Service, INC. | Deerfield | — | ◇ UNVERIFIED |
