| DGDlubak Glass | Upper Sandusky | 20–99 | ◐ LIKELY ACTIVE |
| EPEncore Precast, LLC | Dayton | 100–499 | ◐ LIKELY ACTIVE |
| GCGlen-gery CORP | Galion | — | ◐ LIKELY ACTIVE |
| GDGraymont Dolime Oh INC * | Genoa | — | ◐ LIKELY ACTIVE |
| HWHarbison Walker Refractories Plant | Windham | — | ◐ LIKELY ACTIVE |
| HUHolcim US - Paulding Plant (including Systech Env Corp) | Paulding | — | ◐ LIKELY ACTIVE |
 Johns Manville International INC | Waterville | — | ◐ LIKELY ACTIVE |
| Johns Manville International INC Plant No 8 | Defiance | — | ◐ LIKELY ACTIVE |
| MCMack Concrete | Akron | 20–99 | ◐ LIKELY ACTIVE |
 Mack Industries, INC. | Valley City | 100–499 | ◐ LIKELY ACTIVE |
 Momentive Performance Materials Quartz, INC. (0145000213) | Hebron | — | ◐ LIKELY ACTIVE |
| NMNextech Materials LTD | Lewis Center | 20–99 | ◐ LIKELY ACTIVE |
| OBOwens Brockway Glass Containers - Plant No 12 | Zanesville | — | ◐ LIKELY ACTIVE |
| OCOwens Corning (0142010065) | Mount Vernon | — | ◐ LIKELY ACTIVE |
| OCOwens Corning Insulating Systems, LLC | Newark | — | ◐ LIKELY ACTIVE |
| PNPilkington NA INC -rossford Facility | Rossford | — | ◐ LIKELY ACTIVE |
| PSPrestress Services Industries, LLC - Plant 6 | Mount Vernon | 20–99 | ◐ LIKELY ACTIVE |
| QTQuikrete - Toledo, Oh Plant | Toledo | 1–19 | ◐ LIKELY ACTIVE |
| RSRepublic Steel - Canton Facility | Canton | — | ◐ LIKELY ACTIVE |
| SBSlater Builders Supply | Logan | 1–19 | ◐ LIKELY ACTIVE |
| TBTri-county Block & Brick INC | Swanton | 20–99 | ◐ LIKELY ACTIVE |
| TCTri-county Concrete Company | Twinsburg | 1–19 | ◐ LIKELY ACTIVE |
| WCWestview Concrete CORP | Olmsted Falls | 1–19 | ◐ LIKELY ACTIVE |
| BBBelden Brick CO Plant 4 | Sugarcreek | — | ◐ LIKELY ACTIVE |
| BBBelden Brick Plant 3 (0679005018) | Sugarcreek | — | ◐ LIKELY ACTIVE |
| Johns Manville - Waterville 07 (0448000013) | Waterville | — | ◐ LIKELY ACTIVE |
| MIMarietta Industrial Enterprises (0684000148) | Marietta | — | ◐ LIKELY ACTIVE |
| MMMartin Marietta Magnesia Specialties, LLC | Woodville | — | ◐ LIKELY ACTIVE |
| STSummitville Tiles INC | Minerva | — | ◐ LIKELY ACTIVE |
| AWArmstrong World Industries INC | Hilliard | — | ◇ UNVERIFIED |
| BBBelden Brick CO Plant 2 | Sugarcreek | — | ◇ UNVERIFIED |
| BCBelletech CORP | Bellefontaine | — | ◇ UNVERIFIED |
| BSBowerston Shale CO | Newark | — | ◇ UNVERIFIED |
| BSBowerston Shale Company (0634000012) | Bowerston | — | ◇ UNVERIFIED |
| DIDiamond Innovations INC | Worthington | — | ◇ UNVERIFIED |
| ECEdward C Levy INC | Canton | — | ◇ UNVERIFIED |
| FCFairborn Cement CO LLC | Xenia | — | ◇ UNVERIFIED |
| FPForterra Pipe & Precast, LLC - Macedonia Facility | Macedonia | — | ◇ UNVERIFIED |
| GLGe Lucalox (0243160086) | Willoughby | — | ◇ UNVERIFIED |
 High Concrete Group LLC (1483140150) | Springboro | — | ◇ UNVERIFIED |
| Johns Manville Plant No 2 | Defiance | — | ◇ UNVERIFIED |
| MPMansfield Plumbing Products INC China Division | Perrysville | — | ◇ UNVERIFIED |
| MIMilacron INC Consumable Prods Div | Cincinnati | — | ◇ UNVERIFIED |
| Momentive Performance Materials Quartz INC. (1318558216) | Strongsville | — | ◇ UNVERIFIED |
| PGPittsburgh Glass Works, LLC (0370000217) | Crestline | — | ◇ UNVERIFIED |
| RPResco Products INC (1576000771) | East Canton | — | ◇ UNVERIFIED |
| SCSika Corporation | Streetsboro | — | ◇ UNVERIFIED |
| SIStein INC | Middletown | — | ◇ UNVERIFIED |
| SCSuperior Clay CORP | Uhrichsville | — | ◇ UNVERIFIED |
| VUVesuvius USA CORP. - Conneaut Plant (0204020036) | Conneaut | — | ◇ UNVERIFIED |
