| Cleveland-Cliffs Cleveland Works Llc | Cleveland | 3.4M |
| Vickery Environmental Inc. | Vickery | 2.0M |
| Gavin Power Llc | Cheshire | 140.8k |
| Cardinal Plant | Brilliant | 81.2k |
| Kyger Creek Station | Cheshire | 63.0k |
| North Star Bluescope Steel Llc | Delta | 30.3k |
| Cleveland-Cliffs Inc. | Middletown | 26.2k |
| Mcwane Ductile Ohio | Coshocton | 7.4k |
| Charter Manufacturing Co. Inc. | Cuyahoga Heights | 6.3k |
| Canton Galvanizing Llc | Canton | 5.3k |
| Cleveland-Cliffs Steel Corp - Mansfield Works | Mansfield | 5.0k |
| Pixelle Specialty Solutions Llc | Chillicothe | 4.6k |
| Federal Metal Co | Oakwood Village | 4.4k |
| Vallourec Star Lp | Youngstown | 3.6k |
| Nagalv-Ohio Inc | Canton | 3.2k |
| Ddp Specialty Electronic Materials Us 5 Llc | West Alexandria | 2.2k |
| Johns Manville Plant 7 | Waterville | 2.1k |
| Ohio Galvanizing Corp | Marion | 1.8k |
| Azz Galvanizing Services-Cincinnati | Cincinnati | 1.7k |
| Amg Vanadium Llc | Cambridge | 1.6k |
| Valtir Llc Plt 1055 | Lima | 1.6k |
| Wieland Chase | Montpelier | 1.5k |
| Miami Fort Power Co Llc | North Bend | 1.5k |
| Stephen's Pipe & Steel Inc | Mount Sterling | 1.4k |
| Struktol Co Of America Llc | Stow | 1.2k |
| Azek Building Products | Wilmington | 1.1k |
| Tenneco Inc | Napoleon | 924 |
| Sanoh America Inc. | Findlay | 707 |
| Pcs Nitrogen Ohio L.p. | Lima | 698 |
| Yellowstone Industrial Llc | Girard | 629 |
| Equistar Chemicals Lp | Fairport Harbor | 600 |
| Art Galvanizing Works Inc | Cleveland | 560 |
| Amg Vanadium Llc | Zanesville | 538 |
| Baerlocher Production Usa Llc | Cincinnati | 505 |
| Provimi N.a. Inc. | Lewisburg | 505 |
| Hubbell Power Systems Inc. | Wadsworth | 503 |
| Detrex | Ashtabula | 500 |
| City Plating | Cleveland | 500 |
| Day-Glo Color Corp | Cleveland | 500 |
| Saco Aei Polymers Inc. | Aurora | 500 |
| V&s Columbus Galvanizing Llc | Columbus | 471 |
| Tarkett Usa Dba Johnsonite Rubber Flooring | Middlefield | 470 |
| The Goodyear Tire & Rubber Co | Findlay | 468 |
| Marathon Petroleum Co Lp Ohio Refining Div | Canton | 416 |
| Guaranteed Finishing Unlimited Inc | Cleveland | 384 |
| Monogram Metals Inc | Byesville | 314 |
| Honda Development & Manufacturing Of America Llc - Anna E | Anna | 292 |
| Advics Manufacturing Ohio Inc | Lebanon | 290 |
| Whirlpool Corp Marion Operations | Marion | 255 |
| Mechanical Galv-Plating Corp | Sidney | 250 |
| Hygenic Corp | Akron | 234 |
| Thomas Steel Strip Corp | Warren | 230 |
| Glass Coatings & Concepts | Monroe | 212 |
| Ppg Euclid Pretreatment & Specialty Products | Euclid | 201 |
| Albco Foundry Inc | Lisbon | 183 |
| Nucor Steel Marion Inc | Marion | 174 |
| Essity Operations Wausau Llc | Middletown | 166 |
| Envirite Of Ohio Inc | Canton | 166 |
| Honda Development & Manufacturing Of America Llc | East Liberty | 156 |
| Prospira America Corp | Upper Sandusky | 134 |
| Solvay Specialty Polymers Usa Llc | Marietta | 128 |
| Ppg Industries Ohio Inc - Delaware | Delaware | 121 |
| Basf Corp | Elyria | 119 |
| Erico International Corp | Solon | 97 |
| Johns Manville Plant 2 | Defiance | 92 |
| Msc Walbridge Coatings Inc | Walbridge | 79 |
| Imperial Aluminum-Minerva Llc | Minerva | 70 |
| Kaiser Aluminum Fabricated Products Llc. | Heath | 67 |
| Lubrizol Corp Painesvil Le Plant | Painesville | 61 |
| Chem Technologies Ltd. | Middlefield | 60 |
| Bekaert Corp | Orrville | 56 |
| Titan Tire Of Bryan | Bryan | 56 |
| Arcelormittal Tubular Products Usa Llc | Shelby | 54 |
| The Shepherd Color Co | Cincinnati | 51 |
| Cleveland-Cliffs Columbus Llc | Columbus | 45 |
| Zekelman Industries Wheatland Tube Division-Warren | Warren | 40 |
| Vibrantz Corp | Cleveland | 40 |
| Jsw Steel Usa Ohio Inc. | Mingo Junction | 38 |
| Americhem Inc Scp | Cuyahoga Falls | 38 |
| The Pittsburgh Paints Co. | Huron | 35 |
| Revlis Corp | Akron | 32 |
| American Rheinmetall | Saint Marys | 31 |
| Sunstar Engineering Americas Inc. Automotive Div | Springboro | 31 |
| Aalberts Surface Technologies Aa Llc | Canton | 30 |
| Vibrantz Color Solutions Inc. | Ashtabula | 27 |
| Profusion Industries Llc | Marietta | 27 |
| Pyrotek | Aurora | 27 |
| Varland Plating | Cincinnati | 24 |
| Republic Powdered Metals Inc | Medina | 23 |
| Tremco Cpg Inc. Cleveland Plant | Cleveland | 22 |
| Twist Inc | Xenia | 20 |
| Charter Steel Risingsun | Risingsun | 20 |
| Johns Manville | Milan | 17 |
| Ford Motor Co - Ohio Assembly Plant | Avon Lake | 16 |
| Alliance Tubular Products Llc | Alliance | 16 |
| Chardon Custom Polymers | Chardon | 15 |
| Flow Polymers Llc | Cleveland | 15 |
| Teijin Automotive Technologies - Van Wert | Van Wert | 14 |
| Linde Toledo Facility | Oregon | 13 |
| Polymerics Inc | Kent | 13 |