| CLClosed Loop Glass Solutions | Columbus | — | ◇ UNVERIFIED |
| CICorning Incorporated - Greenville, Oh | Greenville | — | ◇ UNVERIFIED |
| CSCustar Stone CO INC Custar Plant | Custar | — | ◇ UNVERIFIED |
| CCCuyahoga Concrete Hummell Rd Plant | Brookpark | — | ◇ UNVERIFIED |
| DIDgm INC. | Jackson | — | ◇ UNVERIFIED |
| DIDgm, INC. Tow Path Ready Mix | Frankfort | — | ◇ UNVERIFIED |
| DED.r.s. Enterprises, INC. | Garfield Heights | — | ◇ UNVERIFIED |
| EMErie Materials INC. | Sandusky | — | ◇ UNVERIFIED |
| FPFabcon Precast LLC | Grove City | — | ◇ UNVERIFIED |
| FMFoseco Metallurgical, INC. | Ashtabula | — | ◇ UNVERIFIED |
| GLGe Lighting CO Niles Mahoning Glass Plant | Niles | — | ◇ UNVERIFIED |
| GLGe Logan Glass Plant | Logan | — | ◇ UNVERIFIED |
| GCGlen-gery CORP Caledonia Plant | Caledonia | — | ◇ UNVERIFIED |
| GMGranger Materials, INC. | Cleveland | — | ◇ UNVERIFIED |
| GLGreat Lakes an Oldcastle Company | Sheffield | — | ◇ UNVERIFIED |
| HMHarsco Metals - Warren | Warren | — | ◇ UNVERIFIED |
| HMHeidelberg Materials US Cement LLC | Plain, Township of | — | ◇ UNVERIFIED |
| HMHeidelberg Materials US Cement LLC | Cleveland | — | ◇ UNVERIFIED |
| HSHeritage Stone | Zanesville | — | ◇ UNVERIFIED |
| JIJabo INC | Marietta | — | ◇ UNVERIFIED |
 Johns Manville International, INC. - Plant 3 (0320010004) | Defiance | — | ◇ UNVERIFIED |
| KSKonya Sands LLC | Jackson | — | ◇ UNVERIFIED |
| KCKuhlman Corporation | Ohio | — | ◇ UNVERIFIED |
| LNLafarge North America - Dba Whitestone Supply CO | Twinsburg | — | ◇ UNVERIFIED |
| LGLancaster Glass Corporation * | Lancaster | — | ◇ UNVERIFIED |
| MCMack Concrete | Grafton | — | ◇ UNVERIFIED |
| MCMack Concrete, LLC | Mount Vernon | — | ◇ UNVERIFIED |
| MIMack Industries | Vienna | — | ◇ UNVERIFIED |
| MMMartin Marietta Materials INC - Fairborn | Medway | — | ◇ UNVERIFIED |
| MSMedina Supply North Ridgeville Plant 500 | North Ridgeville | — | ◇ UNVERIFIED |
| MIMinteq International INC Zedmark Div | Dover | — | ◇ UNVERIFIED |
| MIMinteq Intl INC | Bryan | — | ◇ UNVERIFIED |
 Momentive Technologies | Richmond Heights | — | ◇ UNVERIFIED |
| MEMorgan Electro Ceramics (1318031627) | Bedford | — | ◇ UNVERIFIED |
| MRM&r Ready Mix, INC. | Stony Ridge | — | ◇ UNVERIFIED |
| NNNew Ngc INC | Lorain | — | ◇ UNVERIFIED |
| OAOldcastle Apg Company, Great Lakes | Cincinnati | — | ◇ UNVERIFIED |
| OCOsborne Co., LTD. | Valley View | — | ◇ UNVERIFIED |
| OIOsborne INC. | Cleveland | — | ◇ UNVERIFIED |
| PEPark Enterprise Construction Company LLC | Marion | — | ◇ UNVERIFIED |
| PCPk Crushing & Materials LLC | Akron | — | ◇ UNVERIFIED |
| PIPpc Insulators | Carey | — | ◇ UNVERIFIED |
| PIProterra INC. | Cleveland | — | ◇ UNVERIFIED |
| RTRca Thompson | Circleville | — | ◇ UNVERIFIED |
| RPResco Products, INC. - United Refractories | Warren | — | ◇ UNVERIFIED |
| RMRichland Moulded Brick CO | Mansfield | — | ◇ UNVERIFIED |
| RMRinker Materials - Concrete Pipe Div | Diamond | — | ◇ UNVERIFIED |
| SNSaint-gobain Norpro | Stow | — | ◇ UNVERIFIED |
| SPScio Packaging Company | Scio | — | ◇ UNVERIFIED |
| SMSeaforth Mineral & Ore CO INC | East Liverpool | — | ◇ UNVERIFIED |
