Aerospace Lubricants, LLC. | Columbus | 20–99 | ● ACTIVE |
| JCJacobi Carbons, INC. | Columbus | 20–99 | ● ACTIVE |
| LRLima Refinery | Lima | 500+ | ● ACTIVE |
| LCLubrizol CORP | Wickliffe | 500+ | ● ACTIVE |
| MBM & B Asphalt CO INC | Tiffin | 20–99 | ● ACTIVE |
| OROhio Refining Company LLC | Oregon | 500+ | ● ACTIVE |
| OEOrion Engineered Carbons | Belpre | 20–99 | ● ACTIVE |
| SESuncoke Energy Middletown Operations | Middletown | 20–99 | ● ACTIVE |
| TGThe Garland Company, INC. | Cleveland | 100–499 | ● ACTIVE |
| TLThe Lubrizol Corporation | Painesville | — | ● ACTIVE |
| TIThorworks Industries, INC | Sandusky | 100–499 | ● ACTIVE |
| TRToledo Refining Company LLC | Oregon | 100–499 | ● ACTIVE |
Kc Marketing LLC | Cincinnati | 20–99 | ● ACTIVE |
| BBBenchmark Biodiesel, INC. | Columbus | — | ● ACTIVE |
Tgp Holdings, LLC | Akron | — | ● ACTIVE |
Topps Products INC | Cleveland | — | ● ACTIVE |
| VAValley Asphalt CORP | Cincinnati | 100–499 | ● ACTIVE |
Varouh Oil, INC. | Elyria | — | ● ACTIVE |
| EPEtna Products INC | Chagrin Falls | 20–99 | ◐ LIKELY ACTIVE |
| FBFiske Brothers Refining CO | Toledo | 20–99 | ◐ LIKELY ACTIVE |
| GMGerken Materials INC | Napoleon | 20–99 | ◐ LIKELY ACTIVE |
| NSNovagard Solutions INC | Cleveland | 100–499 | ◐ LIKELY ACTIVE |
| BLBernard Laboratories INC | Cincinnati | 20–99 | ◐ LIKELY ACTIVE |
| COClark Oil & Chemical/cochem INC | Cleveland | 1–19 | ◐ LIKELY ACTIVE |
| EOEmery Oleochemicals | Cincinnati | 100–499 | ◐ LIKELY ACTIVE |
| MAM. Argueso & Co., INC. | Cleveland | — | ◐ LIKELY ACTIVE |
| SHSoprema Headquarters Addition | Wadsworth | 500+ | ◐ LIKELY ACTIVE |
| TBThe Blaster Chemical Companies | Valley View | 20–99 | ◐ LIKELY ACTIVE |
| TEThe Elco Corporation | Cleveland | 1–19 | ◐ LIKELY ACTIVE |
| AEAmerican Electric Power Gavin Plant | Cheshire | — | ◐ LIKELY ACTIVE |
| BRBucyrus Road Materials (0317010049) | Bucyrus | 1–19 | ◐ LIKELY ACTIVE |
| GMGerken Materials, INC. | Napoleon | 20–99 | ◐ LIKELY ACTIVE |
| HNHaverhill North Cogeneration Facility | Franklin Furnace | — | ◐ LIKELY ACTIVE |
| MPMarathon Petroleum Company LP | Findlay | — | ◐ LIKELY ACTIVE |
| MBMfm Building Products CORP. | Coshocton | 20–99 | ◐ LIKELY ACTIVE |
| PPP&t Products INC | Sandusky | 20–99 | ◐ LIKELY ACTIVE |
| QCQuaker Chemical CORP | Middletown | — | ◐ LIKELY ACTIVE |
| RMRAP Management | Columbus | 20–99 | ◐ LIKELY ACTIVE |
| SMShelly Materials Plant #90 | Columbus | — | ◐ LIKELY ACTIVE |
| AMAsphalt Materials, INC. | Oregon | — | ◐ LIKELY ACTIVE |
| ARAtlas Roofing Corporation, Franklin Roofing Facility (1483040201) | Franklin | — | ◐ LIKELY ACTIVE |
| COCentral Ohio Asphalt | Chesterville | 1–19 | ◐ LIKELY ACTIVE |
| CLCertainteed LLC (0322000017) | Milan | — | ◐ LIKELY ACTIVE |
| CIChs INC Kenton Lube Plant | Kenton | — | ◐ LIKELY ACTIVE |
| CICrafco Inc-youngstown | Youngstown | — | ◐ LIKELY ACTIVE |
| HRHeartland Refinery Group LLC | Columbus | — | ◐ LIKELY ACTIVE |
| LSLTD Steel Coke Plant | Warren | — | ◐ LIKELY ACTIVE |
| MPMarathon Petroleum Company LP | North Bend | — | ◐ LIKELY ACTIVE |
| MCMaster Chemical CORP | Perrysburg | 100–499 | ◐ LIKELY ACTIVE |
| OROhio Refining Division Mpc | Canton | — | ◐ LIKELY ACTIVE |