| HPHanson Pipe & Products Ohio INC | Columbus | — | ◇ UNVERIFIED |
| HMHarsco Metals - Warren | Warren | — | ◇ UNVERIFIED |
| HMHeidelberg Materials US Cement LLC | Cleveland | — | ◇ UNVERIFIED |
| HMHeidelberg Materials US Cement LLC | Plain, Township of | — | ◇ UNVERIFIED |
| HSHeritage Stone | Zanesville | — | ◇ UNVERIFIED |
| JIJabo INC | Marietta | — | ◇ UNVERIFIED |
| JDJafe Decorating CO INC | Greenville | — | ◇ 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 |
| MAMidwest Acoust-a-fiber INC | Delaware | — | ◇ UNVERIFIED |
| MIMinteq International INC Zedmark Div | Dover | — | ◇ UNVERIFIED |
| MIMinteq Intl INC | Bryan | — | ◇ UNVERIFIED |
 Momentive Performance Materials Quartz, INC. | Richmond Heights | — | ◇ UNVERIFIED |
| MEMorgan Electro Ceramics (1318031627) | Bedford | — | ◇ UNVERIFIED |
| MCMoritz Concrete, INC. | Mansfield | — | ◇ UNVERIFIED |
| MRM&r Ready Mix, INC. | Stony Ridge | — | ◇ UNVERIFIED |
| NLNational Lime and Stone Company | Carey | — | ◇ UNVERIFIED |
| NNNew Ngc INC | Lorain | — | ◇ UNVERIFIED |
| NLNhmf, LLC | Columbus | — | ◇ UNVERIFIED |
| NSNock & Son CO | Oak Hill | — | ◇ UNVERIFIED |
| NNorthfield | Cincinnati | — | ◇ UNVERIFIED |
| NANorthfield an Oldcastle Company | Sheffield Lake | — | ◇ UNVERIFIED |
| OOOberfields - Obetz, Oh Hardscapes Plant | Columbus | — | ◇ UNVERIFIED |
| OSOberfields - Sunbury, Oh Masonry Plant | Sunbury | — | ◇ 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 |
| PCPavestone - Cincinnati, Oh Plant | Cincinnati | — | ◇ UNVERIFIED |
| PCPk Crushing & Materials LLC | Akron | — | ◇ UNVERIFIED |
| PIPpc Insulators | Carey | — | ◇ UNVERIFIED |
| PVPremier Vanity Tops LLC | Seaman | — | ◇ UNVERIFIED |
| PIProterra INC. | Cleveland | — | ◇ UNVERIFIED |
| PVP V P Industries INC | North Bloomfield | — | ◇ UNVERIFIED |
| QCQuikrete - Cincinnati, Oh Plant | Harrison | — | ◇ UNVERIFIED |
| QCQuikrete - Cleveland, Oh Plant | Ravenna | — | ◇ UNVERIFIED |
| QCQuikrete - Columbus, Oh Plant | Columbus | — | ◇ 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 |
