The Cluster
Click to EnlargeNortheast Ohio’s Advanced Energy Industry Cluster Directory lists more than 400 organizations that are engaged in Northeast Ohio’s advanced energy industry, including manufacturers, consultants, engineers & architects, research & development, sales & distribution, installers, testing labs, energy providers, and education & training institutions. The list further categorizes these organizations based on the energy sectors in which they are involved: wind energy, smart grid, solar, transportation electrification, biomass/waste-to-energy, clean coal/ccs, energy efficient building materials & systems, energy storage, fuel cells, nuclear and others.
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| Organization | City | County | Sector | Line of Business |
|---|---|---|---|---|
| 11 Good Energy | Canton | Stark | Biomass/Waste-To-Energy | Manufacturing |
| 24plug, Inc. | Cleveland | Cuyahoga | Fuel Cells | Manufacturing |
| 3-D Service | Massilon | Stark | Wind Energy | Service Provider |
| 5iTech, LLC | Cleveland | Cuyahoga | Fuel Cells | Consulting |
| A Better Focus Co. | Massillon | Stark | Solar | Manufacturing |
| A.J. Rose Manufacturing | Avon | Lorain | Other | Manufacturing |
| Acorn Technology Group | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| Acuren Materials Engineering & Testing | Akron | Summit | Wind Energy | Engineer, Architect |
| Adams Manufacturing Company | Cleveland | Cuyahoga | Energy Efficient Building Materials & Systems | Manufacturing |
| Adena Corporation | Mansfield | Richland | Solar | Installer |
| ADI Wind | Sheffield Village | Lorain | Wind Energy | Research, Development Consulting Engineer, Architect Manufacturing Professional Services Service Provider |
| ADMA Advanced Materials Group | Hudson | Summit | Manufacturing Research, Development Consulting |
|
| ADRC Technologies | Hudson | Summit | Wind Energy | Engineer, Architect Manufacturing |
| Advance Manufacturing Corporation | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| Advanced Control Solutions, Inc. | Sylvania | Lucas | Energy Efficient Building Materials & Systems | Consulting Professional Services Research, Development Service Provider |
| Advanced Hydro Solutions | Fairlawn | Summit | Other | Engineer, Architect |
| Advanced Material and Technology Commercialization | Akron | Summit | Fuel Cells | Research, Development |
| Advanced Technology Advisors | Cleveland | Cuyahoga | Energy Storage | Consulting |
| AKA CleanTech Holdings | Beachwood | Cuyahoga | Other | Investor |
| Akron Machine Services Inc. | Akron | Summit | Wind Energy | Manufacturing |
| Akron Polymer Products, Inc | Akron | Summit | Transportation Electrification | Manufacturing |
| ALD group LLC | Eastlake | Lake | Wind Energy | Manufacturing |
| ALL Aerials, LLC | Richfield | Summit | Wind Energy | Service Provider |
| ALL Crane Rental Corp. | Cleveland | Cuyahoga | Wind Energy | Service Provider |
| All Natural Lighting Solutions | Chagrin Falls | Cuyahoga | Energy Efficient Building Materials & Systems | Manufacturing |
| AlphaMicron, Inc. | Kent | Portage | Energy Efficient Building Materials & Systems | Manufacturing |
| Alside | Arkron | Summit | Energy Efficient Building Materials & Systems | Manufacturing |
| ALT Sales Corp. | Richfield | Summit | Wind Energy | Service Provider |
| American Metal Stamping | Cleveland | Cuyahoga | Manufacturing | |
| American Metal Treating Company | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| American Tank & Fabricating | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| American Tower Co. | Shelby | Richland | Wind Energy | Service Provider |
| APB & Associates, Inc. | Cleveland | Cuyahoga | Consulting Manufacturing Professional Services Sales, Distribution |
|
| Applied Industrial Technologies | Cleveland | Cuyahoga | Wind Energy | Sales, Distribution |
| Arisdyne | Cleveland | Cuyahoga | Biomass/Waste-To-Energy | Manufacturing |
| Arlington Energy | Mansfield | Richland | Biomass/Waste-To-Energy | Manufacturing |
| Armstrong Air Conditioning Inc | Bellevue | Huron | Energy Efficient Building Materials & Systems | Manufacturing |
| Ashland Comfort Control | Ashland | Ashland | Energy Efficient Building Materials & Systems | Installer |
| Ashland University | Ashland | Ashland | Other | Education, Training |
| Ashlawn Energy | Painesville | Lake | Fuel Cells | Research, Development Energy Provider Installer Manufacturing |
| Associated Materials (Alside parent company) | Akron | Summit | Other | Manufacturing |
| Astro Manufacturing & Design | Eastlake | Lake | Wind Energy | Manufacturing |
| Astrum Solar | Youngstown | Mahoning | Installer | |
| Avalon Precision Casting Co | Brookpark | Cuyahoga | Wind Energy | Manufacturing |
| AvMat. LLC | Akron | Summit | Fuel Cells | Manufacturing |
| Avon Bearings Corp | Avon | Lorain | Wind Energy | Manufacturing |
| Avtron Industrial Automation | Independence | Cuyahoga | Wind Energy | Manufacturing |
| AZ Renewable Energy | Cleveland | Cuyahoga | Wind Energy | Sales, Distribution |
| Babcock & Wilcox | Barberton | Summit | Solar | Manufacturing |
| Baldor Electric Company | Richmond Heights | Cuyahoga | Energy Efficient Building Materials & Systems | Research, Development |
| Barnes Group, Inc. | Cleveland | Cuyahoga | Fuel Cells | Manufacturing |
| Barth Industries, Inc. | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| Beckett Energy Systems | North Ridgeville | Lorain | Energy Storage | Energy Provider Manufacturing Research, Development |
| BecoTek Manufacturing, Inc. | Lorain | Lorain | Wind Energy | Manufacturing |
| Beverage Machine & Fabricators, Inc. | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| Bio-Gas Technologies, Ltd. | Norwalk | Huron | Biomass/Waste-To-Energy | Installer |
| Biomass Power Projects, LLC | Akron | Summit | Biomass/Waste-To-EnergyEnergy Storage | Consulting |
| Biotronics, Inc. | North Olmsted | Cuyahoga | Energy Efficient Building Materials & Systems | Manufacturing |
| Bodycote Thermal Processing | Highland Heights | Cuyahoga | Wind Energy | Manufacturing |
| Breakthrough Technology Development, Inc | Brecksville | Cuyahoga | Consulting | |
| Brewer-Garrett | Middleburg Heights | Cuyahoga | Biomass/Waste-To-Energy | Manufacturing |
| Brilex Industries | Youngstown | Mahoning | Wind Energy | Manufacturing |
| Brower Insurance Agency, LLC | Dayton | Montgomery | SolarWind Energy | Professional Services |
| C.T.Taylor Co.,Inc. | Hudson | Summit | Other | Service Provider |
| Canton Drop Forge | Canton | Stark | Wind Energy | Manufacturing |
| Carbon Limestone LF | Lowellville | Mahoning | Biomass/Waste-To-Energy | Energy Provider |
| Carbon Vision, LLC | Shaker Heights | Cuyahoga | Other | Consulting Education, Training Installer Professional Services Service Provider |
| Cardinal Fastener & Specialty Co., Inc. | Bedford Heights | Cuyahoga | Wind Energy | Manufacturing |
| CAS Data Loggers | Chesterland | Geauga | Other | Other |
| Case Western Reserve University (Great Lakes Energy Institute) | Cleveland | Cuyahoga | Other | Education, Training |
| Castinite | Chagrin Falls | Cuyahoga | Manufacturing | |
| Castle Energy Systems | North Royalton | Cuyahoga | Wind Energy | Consulting |
| Catacel | Garrettsville | Portage | Fuel Cells | Manufacturing Research, Development |
| CEC Consultants | Cleveland | Cuyahoga | Other | Consulting |
| Center for Transportation & Materials Engr. | Youngstown | Mahoning | Other | Education, Training |
| Century Heating and Cooling, LLC | Sagamore Hills | Summit | Energy Efficient Building Materials & Systems | Installer |
| CGI/Silvercote Inc | Solon | Cuyahoga | Other | Manufacturing |
| Chemsultants International | Mentor | Lake | Fuel Cells | Research, Development |
| China Invests in America, LLC | Cleveland | Cuyahoga | Other | Consulting |
| Cleveland Electric Laboratories | Twinsburg | Summit | Wind Energy | Engineer, Architect |
| Cleveland Gear Company | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| Cleveland Solar & Wind | Cleveland Hts. | Cuyahoga | SolarWind Energy | Installer Sales, Distribution |
| Cleveland State University | Cleveland | Cuyahoga | Other | Education, Training |
| Cleveland Thermal LLC | Cleveland | Cuyahoga | Energy Efficient Building Materials & Systems | Manufacturing |
| Cliffs Natural Resources, Inc. | Cleveland | Cuyahoga | Fuel Cells | Manufacturing |
| Clyde Industrial, LLC | Avon | Lorain | Wind Energy | Installer |
| Cole Design and Development, LLC | Stow | Summit | Other | Consulting |
| Compass Energy LLC | Cleveland | Cuyahoga | Other | Manufacturing |
| Contained Energy | Shaker Heights | Cuyahoga | Fuel Cells | Research, Development |
| COT-PURITECH Wind LLC | Canton | Stark | Wind Energy | Service Provider |
| COTSWORKS | Cleveland | Cuyahoga | Other | Manufacturing |
| Creative Fuels, LLC | Cuyahoga Falls | Summit | Biomass/Waste-To-Energy | Manufacturing |
| Creative Fuels,LLC | Cuyahoga Falls | Summit | Biomass/Waste-To-Energy | Manufacturing |
| CSA America Inc. | Cleveland | Cuyahoga | Fuel CellsOther | Other |
| Custom Solar Works | Massillon | Stark | Solar | Sales, Distribution |
| Cuyahoga Community College | Cleveland | Cuyahoga | Other | Education, Training |
| CW Ohio | Conneaut | Ashtabula | Energy Efficient Building Materials & Systems | Manufacturing |
| Cyber Utility | Cleveland | Cuyahoga | Biomass/Waste-To-Energy | Manufacturing |
| DAI Ceramics | Willoughby | Lake | Fuel Cells | Manufacturing |
| Darrah Electric Co Inc | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| DcNG and Technical Service | South Euclid | Cuyahoga | Other | Manufacturing |
| Delta Systems Inc | Streetsboro | Portage | Manufacturing Professional Services Research, Development Service Provider Other |
|
| Die-Matic Corporation | Brooklyn Heights | Cuyahoga | Fuel Cells | Manufacturing |
| Disconnect, LLC | Willoughby | Lake | Other | Manufacturing |
| Dix & Eaton | Cleveland | Cuyahoga | Other | Professional Services |
| Dornback Furnace Division | Garfield Heights | Cuyahoga | Energy Efficient Building Materials & Systems | Manufacturing |
| Doty & Miller Architects | Bedford | Cuyahoga | Other | Professional Services |
| Dovetail Solar and Wind | Chagrin Falls | Cuyahoga | SolarWind Energy | Manufacturing |
| Duffy+Duffy Energy Tax Savings | Westlake | Cuyahoga | Energy Efficient Building Materials & Systems | Engineer, Architect Professional Services Other |
| Dylon Industries, Inc. | Cleveland | Cuyahoga | Fuel Cells | Manufacturing |
| Dynamic Energy Group | Beachwood | Cuyahoga | Smart Grid | Consulting Education, Training Professional Services |
| Dynamic Technology, Inc. | Cleveland | Cuyahoga | Other | Service Provider |
| Dyson Corporation | Painesville | Lake | Wind Energy | Manufacturing |
| Early Stage Partners LP | Cleveland | Cuyahoga | Fuel Cells | Investor |
| Earth Day Coalition | Cleveland | Cuyahoga | Other | Other |
| Eaton Corporation | Cleveland | Cuyahoga | Fuel Cells | Research, Development |
| Ebner | Wadsworth | Medina | Wind Energy | Manufacturing |
| EBO Group | Sharon Center | Medina | Other | Manufacturing |
| Echos Air, Inc | Parma | Cuyahoga | Energy Efficient Building Materials & Systems | Installer |
| EcoEarth Energy, LLC | Lakewood | Cuyahoga | Biomass/Waste-To-Energy | Manufacturing |
| EGC | Chardon | Geauga | Wind Energy | Manufacturing |
| Elevated Sale, Inc. | Elyria | Lorain | Consulting | |
| Ellwood Engineered Castings | Hubbard | Trumbull | Wind Energy | Manufacturing |
| Eltech Systems/ De Nora Tech | Chardon | Geauga | Fuel Cells | Manufacturing |
| Energetix LLC | Chardon | Geauga | Biomass/Waste-To-Energy | Manufacturing |
| Energy Focus Inc. | Solon | Cuyahoga | Manufacturing Research, Development |
|
| Energy Industries of Ohio | Independence | Cuyahoga | Other | Other |
| Energy Technologies Inc. | Mansfield | Richland | Fuel Cells | Manufacturing |
| Enerlogics Networks Inc. | Youngstown | Mahoning | Energy Efficient Building Materials & Systems | Professional Services |
| Enterprise Corp | Twinsburg | Summit | Energy Efficient Building Materials & Systems | Installer |
| Enterprise Welding & Fabricating, Inc. | Mentor | Lake | Fuel CellsSolarWind Energy | Manufacturing |
| Enviro-Engine Ltd. | Magnolia | Stark | OtherTransportation Electrification | Manufacturing Research, Development |
| EPR Consulting Services, LLC | Concord Twp | Geauga | Clean Coal/CCSOther | Consulting Professional Services Other |
| ERICO Inc. | Solon | Cuyahoga | SolarWind Energy | Manufacturing |
| ESA Automation Services Inc | Pepper Pike | Cuyahoga | Other | Consulting |
| ESD Technologies, Inc. | Willoughby | Lake | Wind Energy | Installer |
| eSoft Sales | Cleveland | Cuyahoga | Consulting Education, Training Professional Services Sales, Distribution Service Provider |
|
| EXTOL of Ohio | Norwalk | Huron | Other | Manufacturing |
| Eye Lighting International | Mentor | Lake | Energy Efficient Building Materials & Systems | Manufacturing |
| F Squared Laboratories | Middlefield | Geauga | Fuel Cells | Testing (Labs) |
| F.O.M. Systems, Inc. | Mogadore | Portage | Other | Consulting |
| Federal Gear | Willoughby | Lake | Wind Energy | Manufacturing |
| Ferro | Cleveland | Cuyahoga | Solar | Sales, Distribution |
| Ferro Electronic Material Systems | Independence | Cuyahoga | Solar | Manufacturing |
| First Geothermal Energy | Wooster | Wayne | Energy Efficient Building Materials & SystemsOther | Installer |
| FirstEnergy | Akron | Summit | Biomass/Waste-To-EnergySolarWind Energy | Energy Provider |
| Five Star Technologies | Independence | Cuyahoga | Solar | Manufacturing |
| Fives North American Combustion | Cleveland | Cuyahoga | Biomass/Waste-To-EnergyClean Coal/CCSEnergy Efficient Building Materials & Systems | Manufacturing Research, Development Service Provider |
| Flex Fuel Combustion | Perrysville | Richland | Research, Development | |
| Flow Line Options Corp. | Macedonia | Summit | Other | Manufacturing |
| FoilTek Inc. | Cleveland | Cuyahoga | Solar | Manufacturing |
| Fomo Products Inc | Akron | Summit | Other | Manufacturing |
| Forry Inc | Chagrin Falls | Cuyahoga | Other | Manufacturing |
| Four Seasons WindPower | Medina | Medina | Wind Energy | Manufacturing |
| Friedberg-Americas | Cleveland | Cuyahoga | Sales, Distribution | |
| Fulton Manufacturing Industries, L.L.C. | Brecksville | Cuyahoga | Fuel Cells | Manufacturing |
| G & C Quality Air Care, Inc | Vermilion | Lorain | Energy Efficient Building Materials & Systems | Installer |
| Gardiner Trane | Solon | Cuyahoga | Energy Efficient Building Materials & Systems | Installer |
| Garick Solutions | Cleveland | Cuyahoga | Biomass/Waste-To-Energy | Manufacturing |
| Gaspar Inc. | Canton | Stark | Wind Energy | Manufacturing |
| GBSA, Inc. | Chardon | Geauga | Wind Energy | Manufacturing |
| GE Lumination | Valley View | Cuyahoga | Energy Efficient Building Materials & Systems | Manufacturing |
| Gearing Solutions Inc | Solon | Cuyahoga | Energy Efficient Building Materials & Systems | Manufacturing |
| Genesis Lamp Corporation | Painesville | Lake | Energy Efficient Building Materials & Systems | Manufacturing Sales, Distribution |
| Geo-Hydro Supply LTD | Sugarcreek | Tuscarawas | Energy Efficient Building Materials & Systems | Sales, Distribution |
| Geothermal Professionals | South Russell | Geauga | Energy Efficient Building Materials & SystemsOther | Installer |
| Gibraltar Industries | Cuyahoga Heights | Cuyahoga | Wind Energy | Manufacturing |
| Glebus Alloys LLC USA | Akron | Summit | Wind Energy | Manufacturing |
| Glennan Microsystems, Inc. | Cleveland | Cuyahoga | Other | Manufacturing |
| Global Sustainable Center | Sandusky | Erie | Energy Efficient Building Materials & SystemsOther | Other |
| GMX Inc (subsidiary of Garland) | Cleveland | Cuyahoga | Other | Manufacturing |
| Goodyear Tires | Akron | Summit | Other | Manufacturing |
| Grace Geothermal Inc. | Chardon | Geauga | Energy Efficient Building Materials & SystemsOther | Installer |
| Graco Ohio | Canton | Stark | Fuel Cells | Manufacturing |
| Graef Windows | Boardman | Mahoning | Energy Efficient Building Materials & Systems | Manufacturing |
| GrafTech International | Parma | Cuyahoga | Fuel CellsOtherSolar | Manufacturing Research, Development Testing (Labs) |
| GRAFTECH INTERNATIONAL LTD. | Parma | Cuyahoga | Fuel Cells | Manufacturing |
| GraftTech (Natural Graphite Operations) | Lakewood | Cuyahoga | Fuel Cells | Manufacturing |
| Graphite Sales | Chagrin Falls | Cuyahoga | Fuel Cells | Manufacturing |
| Gravitational Energy Corporation | Cuyahoga Falls | Summit | Manufacturing | |
| Graywacke Engineering Inc. | Mansfield | Richland | Energy Storage | Manufacturing |
| Great Lakes Institute for Energy Innovation | Cleveland | Cuyahoga | Fuel Cells | Research, Development |
| Great Lakes Towing Company | Cleveland | Cuyahoga | Wind Energy | Service Provider |
| Great Lakes Wind Energy LLC | Youngstown | Mahoning | Wind Energy | Energy Provider |
| Great Lakes Wind Network | Cleveland | Cuyahoga | OtherWind Energy | Other |
| Green City Blue Lake Institute (at CMNH) | Cleveland | Cuyahoga | Other | Other |
| Green Energy Ohio | Cleveland | Cuyahoga | Other | Education, Training |
| Green Energy Technologies | Akron | Summit | Wind Energy | Manufacturing |
| GreenField Solar Corp. | Oberlin | Lorain | Solar | Manufacturing Installer Research, Development Sales, Distribution |
| GreenStreet Solutions | Oakwood Village | Cuyahoga | Consulting Education, Training Installer Sales, Distribution |
|
| GreenTec, LLC | North Canton | Stark | Solar | Manufacturing |
| GSH Industries | Cleveland | Cuyahoga | Solar | Manufacturing |
| Hadlock Plastics, LLC | Geneva | Ashtabula | Fuel Cells | Manufacturing |
| Hamby Young | Aurora | Portage | Wind Energy | Engineer, Architect |
| Hardy Road Landfill | Akron | Summit | Biomass/Waste-To-Energy | Manufacturing |
| Harris Battery | Bolivar | Tuscarawas | Wind Energy | Service Provider |
| Hays Cleveland | Cleveland | Cuyahoga | Energy Efficient Building Materials & Systems | Manufacturing |
| HD Supply Utilities | Hudson | Summit | Sales, Distribution | |
| Heat Exchange Applied Technology Inc. | Orville | Wayne | Fuel Cells | Manufacturing |
| Herschman Architects, Inc | Warrensville Heights | Cuyahoga | Other | Engineer, Architect |
| Hicks Partners, LLC | Dublin | Franklin | Biomass/Waste-To-EnergyFuel CellsOtherSolar | Consulting |
| Hinkley Lighting | Cleveland | Cuyahoga | Energy Efficient Building Materials & Systems | Manufacturing |
| Hydro Air | Mansfield | Richland | Energy Efficient Building Materials & Systems | Manufacturing |
| Hyload Roofing Systems | Seville | Medina | Energy Efficient Building Materials & SystemsEnergy Storage | Manufacturing |
| Hyundai Ideal Electric Company | Mansfield | Richland | Wind Energy | Manufacturing |
| IBC Solar Inc. | Cleveland | Cuyahoga | Solar | Manufacturing |
| iBEng | Westlake | Cuyahoga | Wind Energy | Consulting |
| IBEW Training Facility | Cleveland | Cuyahoga | Other | Education, Training |
| Icykx | Sugarcreek | Tuscarawas | Energy Efficient Building Materials & Systems | Installer |
| IMDS Defense Systems | Youngstown | Mahoning | Consulting Energy Provider Manufacturing Preofessional Services Sales, Distribution Other |
|
| Industrial Railway Switching & Services | Lorain | Lorain | Other | Manufacturing |
| Innovative Industries,LLC | Macedonia | Summit | Wind Energy | Manufacturing |
| Innovative Power and Energy Storage Solutions (IPESsol, Inc.) | Sharon Center | Medina | Energy StorageSolar | Research, Development |
| InnoVentures Inc. | Mentor | Lake | Fuel Cells | Manufacturing |
| Insight Services | Cleveland | Cuyahoga | Wind Energy | Testing (Labs) |
| J&S Products, Inc. | Stow | Summit | Transportation Electrification | Manufacturing |
| J.R. Bovyer Electrical Sales of Ohio | Hudson | Summit | ||
| Jackson and Sons Drilling and Pump Co. | Mansfield | Richland | Energy Efficient Building Materials & Systems | Installer |
| Jarrett Inc | East Palestine | Columbiana | Energy Efficient Building Materials & Systems | Manufacturing |
| Jennings Heating | Akron | Summit | Energy Efficient Building Materials & SystemsSolar | Installer |
| Jergens, Inc. | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| Joe Mescan Windmill | Columbia Station | Lorain | Wind Energy | Sales, Distribution |
| Joel Bednar | Huson | Summit | Biomass/Waste-To-Energy | Research, Development |
| Joslyn Hi-Voltage | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| Joyce Manufacturing Company | Berea | Cuyahoga | Energy Efficient Building Materials & Systems | Manufacturing |
| JW Great Lakes Wind | Cleveland | Cuyahoga | Biomass/Waste-To-EnergySolarWind Energy | Installer Consulting |
| ka, Inc. | Cleveland | Cuyahoga | Energy Efficient Building Materials & SystemsOtherSolar | Engineer, Architect |
| Kalt Manufacturing | North Ridgeville | Lorain | Fuel CellsWind Energy | Manufacturing |
| Kaydon Corporation | Avon | Lorain | Wind Energy | Manufacturing |
| KB Compost Services, Inc. | Akron | Summit | Biomass/Waste-To-Energy | Manufacturing |
| KCA Geothermal Services Inc | Mansfield | Richland | Energy Efficient Building Materials & SystemsOther | Sales, Distribution |
| Kelly Aerospace | Willoughby | Lake | Wind Energy | Manufacturing Research, Development |
| Kent State University | Kent | Portage | Solar | Research, Development Education, Training |
| Kentak Products Co. | East Liverpool | Columbiana | Wind Energy | Manufacturing |
| Kichler Lighting | Independence | Cuyahoga | Energy Efficient Building Materials & Systems | Manufacturing |
| King Machine & Tool Co. | Massillon | Stark | Wind Energy | Manufacturing |
| Koyo Corporation of USA | Westlake | Cuyahoga | Wind Energy | Manufacturing |
| KST Coatings Manufacturing Inc (business unit of Sherwin-Williams) | Twinsburg | Summit | Other | Manufacturing |
| Labyrinth Management Group, Inc. | Medina | Medina | Other | Consulting |
| Lake County Landfill | Painesville | Lake | Biomass/Waste-To-Energy | Energy Provider |
| Lake Erie Electric | Westlake | Cuyahoga | Energy Efficient Building Materials & SystemsSolarWind Energy | Installer |
| Lanly Company | Cleveland | Cuyahoga | Fuel Cells | Sales, Distribution |
| Laszeray Technology, Inc. | North Royalton | Cuyahoga | Fuel Cells | Manufacturing |
| LeBeau Geothermal Heating and Cooling | Malvern | Carroll | Energy Efficient Building Materials & SystemsOther | Installer |
| Leff Electric | Cleveland | Sales, Distribution | ||
| Lighting Services, Inc. | Twinsburg | Summit | Energy Efficient Building Materials & Systems | Education, Training Installer Sales, Distribution |
| Lincoln Electric Company | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| LNE Group | Cleveland | Cuyahoga | Fuel CellsWind Energy | Consulting |
| Lockheed Martin MS2 | Akron | Summit | Fuel Cells | Research, Development |
| Lorain County Community College | Elyria | Lorain | Fuel Cells | Education, Training |
| Lorain County II Landfill | Oberlin | Lorain | Biomass/Waste-To-Energy | Energy Provider |
| Lorain County JVS | Oberlin | Lorain | Other | Education, Training |
| LTI Power Systems | Elyria, | Lorain | Other | Manufacturing |
| Lubrizol Advanced Materials, Inc. | Wickliffe | Lake | Wind Energy | Manufacturing |
| Lumination Technologies LLC | Rocky River | Cuyahoga | Energy Efficient Building Materials & Systems | Manufacturing |
| M&G Polymers USA | Sharon Center | Medina | Biomass/Waste-To-Energy | Manufacturing |
| M-7 Technologies | Youngstown | Mahoning | Investor Manufacturing Professional Services Research, Development |
|
| MAGNET | Cleveland | Cuyahoga | Other | Other |
| Magnetech Industrial Services | Massillon | Stark | Wind Energy | Manufacturing |
| Makel Engineering- Sensor Development | Cleveland | Cuyahoga | Biomass/Waste-To-EnergyFuel Cells | Research, Development |
| Mansfield Industries, Inc. | Mansfield | Richland | Fuel Cells | Manufacturing |
| Maple Fund | Cleveland | Cuyahoga | Fuel Cells | Investor |
| Marpro LLC | Akron | Summit | Other | Installer |
| Martindale Electric Co. | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| McMahon DeGulis, LLP | Cleveland | Cuyahoga | Other | Other |
| Meadow Environments LLC | Huron | Erie | Biomass/Waste-To-Energy | Consulting |
| MegaJoule Storage | Cleveland | Cuyahoga | Energy Storage | Manufacturing |
| Melamed Communications | Cleveland | Cuyahoga | Consulting | |
| Metal Improvement Company- Shot Peening | Twinsburg | Summit | Wind Energy | Manufacturing |
| Meyers, Roman, Friedberg & Lewis | Cleveland | Cuyahoga | Other | Professional Services |
| MHP Controls LLC | Sheffield Village | Lorain | Solar | Manufacturing |
| Michael Byrne Manufacturing Co., Inc. | Mansfield | Richland | Wind Energy | Service Provider |
| Mid America Stainless | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| Middleton Geothermal Services | Akron | Summit | Energy Efficient Building Materials & SystemsOther | Energy Provider |
| Midwest Industrial Supply Inc. | Canton | Stark | Wind Energy | Service Provider |
| Mirka Abrasives | Twinsburg | Summit | Wind Energy | Manufacturing |
| Mizar Technologies, LLC | Aurora | Portage | Manufacturing | |
| MK Metal Products Inc | Mansfield | Richland | Manufacturing | |
| Modtech Corp. | Willoughby | Lake | Energy Storage | Manufacturing |
| Molded Fiber Glass Companies | Ashtabula | Ashtabula | SolarWind Energy | Manufacturing |
| Momentive Performance Materials | Strongsville | Cuyahoga | Manufacturing | |
| Monarch Group | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| Moxon & Associates | Hudson | Summit | Biomass/Waste-To-EnergyClean Coal/CCSEnergy StorageFuel CellsSolarWind Energy | Professional Services |
| Mr. Excavtor | Chardon | Geauga | Biomass/Waste-To-Energy | Manufacturing |
| MRD Solutions LLC | Eastlake | Lake | Wind Energy | Manufacturing |
| Multi Solar Inc. | Cleveland | Cuyahoga | Solar | Sales, Distribution |
| Multi-Wing America Inc | Middlefield | Geauga | Wind Energy | Manufacturing |
| Multilink, Inc. | Elyria | Lorain | Solar | Manufacturing |
| MV Circuit Design Inc | Vermilion | Lorain | Wind Energy | Research, Development |
| Myers Motors | Tallmadge | Summit | Transportation Electrification | Manufacturing |
| Myers Power Products | Massillon | Stark | Fuel Cells | Manufacturing |
| Myron Wehr Farms, LLC | New Waterford | Columbiana | Biomass/Waste-To-Energy | Manufacturing |
| NASA Glenn Research Center | Cleveland | Cuyahoga | Other | Research, Development |
| National Instruments | Cleveland | Cuyahoga | Biomass/Waste-To-EnergyEnergy Efficient Building Materials & SystemsEnergy StorageFuel CellsOtherSolarTransportation ElectrificationWind Energy | Consulting Education, Training Service Provider Other |
| Nautica Windpower LLC | Olmsted Falls | Cuyahoga | Wind Energy | Research, Development |
| Nelson Stud Welding Inc. | Elyria | Lorain | Wind Energy | Manufacturing |
| Neural Systems LLC | Warren | Trumbull | Fuel CellsSolar | Research, Development |
| New Horizon Partners, Inc. | Solon | Cuyahoga | Other | Consulting |
| NEWGreen Legacy Services Inc. | Perry | Lake | Service Provider | |
| Norbar Torque Tools, Inc | Willoughby | Lake | Wind Energy | Manufacturing |
| Nordson | Westlake | Cuyahoga | Solar | Manufacturing |
| North American Coating Laboratories | Mentor | Lake | Solar | Manufacturing |
| North Shore Safety, Ltd. | Mentor | Lake | Transportation Electrification | Manufacturing |
| Northeast Ohio Council on Higher Education | Cleveland | Cuyahoga | Other | Research, Development |
| Northern States Metals | Youngstown | Mahoning | Solar | Manufacturing |
| Norton Environmental Equipment Company, Ltd. | Independence | Cuyahoga | Biomass/Waste-To-Energy | Sales, Distribution |
| Novolyte Technologies | Independence | Cuyahoga | Energy Storage | Manufacturing Research, Development |
| NPA Coatings | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| NSL Analytical Services, Inc. | Cleveland | Cuyahoga | Nuclear | Testing (Labs) |
| Oasis Sunrooms/Joyce Mfg | Berea | Cuyahoga | Energy Efficient Building Materials & Systems | Manufacturing |
| OíBrock Windmill Distributors | North Benton | Mahoning | Wind Energy | Installer |
| Oberlin College | Oberlin | Lorain | Other | Education, Training Research, Development |
| Ohio Aerospace Institute | Cleveland | Cuyahoga | Other | Research, Development |
| Ohio Agricultural Research and Development Center (OARDC) | Wooster | Wayne | Other | Research, Development |
| Ohio Cat-Caterpiller Power Systems Division | Broadview Heights Canton, Cleveland, Youngstown | Tuscarawas, Cuyahoga, Stark, Mahoning | Fuel Cells | Manufacturing |
| Ohio Department of Development | Akron | Summit | Other | |
| Ohio Fuel Cell Coalition | Cleveland | Cuyahoga | Fuel CellsOther | Other |
| Ohio Star Forge Co. | Warren | Trumbull | Wind Energy | Manufacturing |
| Ohio Windmill Manufacturing Co., LLC | Berlin Center | Mahoning | Wind Energy | Manufacturing |
| Old State Technologies | Chardon | Geauga | Solar | Energy Provider |
| Olymco, Inc. | Canton | Stark | Solar | Manufacturing |
| Olympic Steel Co. | Bedford Heights | Cuyahoga | Wind Energy | Manufacturing |
| Om Consulting Group, LLC | Shaker Heights | Cuyahoga | Energy Efficient Building Materials & SystemsOtherSolarWind Energy | Consulting Education, Training Professional Services |
| Omnitek LLC | Beachwood | Cuyahoga | Professional Services | |
| Ontic ProSource, Inc | Youngstown | Mahoning | Other | Professional Services |
| Orbital Research Inc. | Cleveland | Cuyahoga | Other | Manufacturing |
| Osborn Engineering | Cleveland | Cuyahoga | Energy Efficient Building Materials & SystemsSolarWind Energy | Engineer, Architect |
| Pacific Fuel Cell Corp. | Willoughby | Lake | Fuel Cells | Manufacturing |
| Panel Master LLC | La Grange | Lorain | Biomass/Waste-To-EnergyEnergy Efficient Building Materials & SystemsEnergy StorageOther | Engineer, Architect Manufacturing |
| Parker Fabricating Co. | Akron | Summit | Wind Energy | Manufacturing |
| PARKER HANNIFIN CORPORATION | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| Patriot Energy LLC | Cuyahoga Falls | Summit | Biomass/Waste-To-Energy | Manufacturing |
| Patriot Engineering Co. | Chagrin Falls | Geauga | Other | Consulting Professional Services Research, Development |
| PCX Energy Services, LLC | Independence | Cuyahoga | Energy Efficient Building Materials & Systems | Consulting |
| PEGASUS TECHNOLOGIES, INC. | Chardon | Geauga | Clean Coal/CCS | Manufacturing |
| Pew Environmental Group | Cleveland | Cuyahoga | Other | Other |
| Phillips Electric | Cleveland | Cuyahoga | Wind Energy | Consulting Installer |
| Phycal LLC | Highland Heights | Cuyahoga | Biomass/Waste-To-Energy | Research, Development |
| Pier Associates, Inc. | Akron | Summit | Energy Efficient Building Materials & Systems | Sales, Distribution |
| Plastech Consulting, Inc. | North Canton | Summit | Fuel Cells | Consulting |
| Plug Smart Solutions | Avon Lake | Lorain | Energy Efficient Building Materials & SystemsSolarWind Energy | Consulting Energy Provider Investor Professional Services |
| PolarCell - SKRL | Eastlake | Lake | Fuel Cells | Manufacturing |
| Polaris Technologies | Youngstown | Mahoning | Energy Storage | Manufacturing |
| Policy Matters Ohio | Cleveland | Cuyahoga | Other | Other |
| Polyflow | Akron | Summit | Biomass/Waste-To-Energy | Consulting Energy Provider Installer Manufacturing Research, Development |
| Polymer Packaging Inc. | Massillon | Stark | Fuel Cells | Manufacturing |
| PolyOne Corp | Avon Lake | Lorain | Fuel CellsSolarWind Energy | Manufacturing |
| Polywire Tough Composites | Hudson | Summit | Transportation Electrification | Research, Development |
| Powdermet Inc. | Euclid | Cuyahoga | Fuel Cells | Manufacturing |
| Power Systems Development (PSD) | Canton | Stark | Wind Energy | Engineer, Architect |
| Powers Financial Group | Pepper Pike | Cuyahoga | Other | Consulting |
| PPG Industries | Cleveland | Cuyahoga | Other | Manufacturing |
| PPM Instruments | Cleveland | Cuyahoga | Fuel Cells | Manufacturing |
| Precision Machined Products Assoc. | Brecksville | Cuyahoga | Other | Manufacturing |
| Preformed Line Products (Division of Ö) | Mayfield | Cuyahoga | Solar | Manufacturing |
| Premix, Inc | North Kingsville | Ashtabula | Energy StorageSolarWind Energy | Manufacturing |
| Proe Power Systems, LLC | Medina | Medina | Biomass/Waste-To-Energy | Research, Development |
| Proe Power Systems, LLC | Medina | Medina | Biomass/Waste-To-Energy | Research, Development |
| Progressive Foam Technologies Inc | Beach City | Stark | Other | Manufacturing |
| ProVia Door Inc | Sugarcreek | Tuscarawas | Other | Manufacturing |
| PSL of America | Twinsburg | Summit | Wind Energy | Manufacturing |
| PT Tech Inc | Sharon Center | Medina | Wind Energy | Manufacturing |
| Quantum Electronic Development | Hudson | Summit | Other | Consulting |
| R&A Energy Solutions, LLC | North Ridgeville | Lorain | Biomass/Waste-To-EnergyEnergy StorageOther | Energy Provider Professional Services |
| R&M Materials Handling Inc. | North Olmsted | Cuyahoga | Wind Energy | Manufacturing |
| R. A. Energy International, Inc. | Cleveland | Cuyahoga | Solar | Manufacturing |
| R. W. Beckett Corp. | North Ridgeville | Lorain | Energy Storage | Manufacturing Research, Development |
| Radcliffe Steel | Berea | Cuyahoga | Manufacturing | |
| RBB Systems, Inc. | Wooster | Wayne | Other | Manufacturing |
| Recharge Power LLC | Gates Mill | Cuyahoga | Transportation Electrification | Manufacturing |
| Refractory Specialties | Sebring | Mahoning | Fuel Cells | Manufacturing |
| Renaissance Group | Kirtland | Lake | SolarWind Energy | Service Provider |
| REPower Solutions | Cleveland | Cuyahoga | SolarWind Energy | Sales, Distribution Installer |
| Republic Powdered Metals Inc | Medina | Mediana | Other | Manufacturing |
| Revere Building Products | Akron | Summit | Energy Efficient Building Materials & Systems | Manufacturing |
| Rexorce Thermionics | Akron | Summit | Energy Efficient Building Materials & Systems | Manufacturing |
| Richard L. Middaugh | Rocky River | Cuyahoga | Energy Storage | Consulting |
| Rockwell Automation | Mayfield Heights | Cuyahoga | Other | Manufacturing Research, Development |
| Rol-Fab Incorporated | Garfield Heights | Cuyahoga | Wind Energy | Manufacturing |
| Rolls-Royce Fuel Cell Systems | North Canton | Stark | Fuel Cells | Manufacturing |
| Rotek Corporation | Aurora | Portage | Wind Energy | Manufacturing |
| RoviSys | Aurora | Portage | Professional Services | |
| Ryerson Steel | Cleveland | Cuyahoga | Other | |
| Sanborn Head and Associates, Inc. | Fairlawn | Summit | Engineer, Architect |
|
| Sawyer Technical Materials, LLC | Eastlake | Lake | Energy Storage | Manufacturing |
| Schalmo Builders | Canal Fulton | Stark | Energy Efficient Building Materials & SystemsOther | Installer |
| Schmack BioEnergy (Corporate Headquarters) | Cleveland | Cuyahoga | Biomass/Waste-To-Energy | Manufacturing |
| Seaman Corporation | Wooster | Wayne | Other | Manufacturing |
| Semtorq, Inc. | Aurora | Portage | ||
| SGI Global Business Advisors LLC | Cleveland | Cuyahoga | Other | Consulting |
| Shanklin & Associates | Cleveland | Cuyahoga | Other | |
| Sheffield Metals International | Sheffield Village | Lorain | Other | Manufacturing |
| Sherwin-Williams | Cleveland | Cuyahoga | SolarWind Energy | Manufacturing |
| Simpson Heating and Cooling | New Philadelphia | Tuscarawas | Energy Efficient Building Materials & SystemsOther | Installer |
| Sisler Heating and Cooling | Medina | Medina | Energy Efficient Building Materials & SystemsOther | Installer |
| SNL Enterprises, Inc | Wooster | Wayne | SolarWind Energy | Consulting Installer Sales, Distribution |
| SOFCO - EFS HOLDINGS LLC | Alliance | Stark | Fuel Cells | Manufacturing |
| Soft-Lite Windows | Streetboro | Portage | Energy Efficient Building Materials & Systems | Manufacturing |
| Solar Creations | Perrysville | Ashland | Solar | Installer |
| Solar Impact LLC | Shaker Hts | Cuyahoga | Other | |
| Solar Lighting and Roofing Systems, Inc. | Westlake | Cuyahoga | Energy StorageSolar | Installer |
| Solaris Blackstone | Kent | Portage | Solar | Installer |
| Soprema Inc | Wadsworth | Medina | Other | Manufacturing |
| SORBENT TECHNOLOGIES CORP | Twinsburg | Summit | Clean Coal/CCS | Manufacturing |
| Spero Electric Corporation | Streetboro | Portage | Energy Storage | Manufacturing |
| Spyglass Green Marketing | Mentor | Lake | Other | Professional Services Service Provider |
| SSP Fittings | Twinsburg | Summit | Fuel Cells | Manufacturing |
| Stanek Vinyl Windows | Cuyahoga Heights | Cuyahoga | Energy Efficient Building Materials & Systems | Manufacturing |
| Star Precision Products | Mentor | Lake | Fuel Cells | Manufacturing |
| Stark Development Board | Canton | Stark | Fuel Cells | Professional Services |
| Stark State College | North Canton | Stark | Fuel Cells | Education, Training Research, Development |
| STEMout | Cleveland | Cuyahoga | Other | Education, Training |
| Stonehouse Well Drilling | Ashtabula | Ashtabula | Energy Efficient Building Materials & SystemsOther | Installer |
| Story Equipment Sales, Inc. | Oakwood Village | Cuyahoga | Energy Efficient Building Materials & Systems | Sales, Distribution |
| Stratum Technologies | Cleveland | Cuyahoga | Energy Storage | Manufacturing |
| Sunflower Solutions | Cleveland | Cuyahoga | Solar | Sales, Distribution |
| Sunlight Energy Systems | North Lawrence | Stark | Solar | Sales, Distribution |
| SunVeil Solar Corp. | Cleveland | Cuyahoga | Solar | Manufacturing |
| SureSite Consulting Group, LLC | Beachwood | Cuyahoga | Consulting Engineer, Architect Professional Services Other |
|
| Sustainable Structures LLC | Chardon | Geauga | Wind Energy | Manufacturing |
| Swagelok | Solon | Cuyahoga | Energy Efficient Building Materials & SystemsFuel CellsOtherSolar | Manufacturing |
| Swiger Coil Systems Inc | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| System Seals Incorporated | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| T & B Foundry Co. | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| TCP Lighting | Aurora | Portage | Energy Storage | Manufacturing |
| Team NEO | Cleveland | Cuyahoga | Other | Other |
| TechColumbus | Columbus | Franklin | Biomass/Waste-To-EnergyEnergy StorageFuel CellsTransportation Electrification | Consulting |
| Technical Staffing Professionals LLC | Warren | Trumbull | Fuel CellsOther | Other |
| Technical Staffing Professionals LLC | Warren | Trumbull | Energy StorageFuel CellsOtherSolarTransportation Electrification | Professional Services |
| Technoform | Twinsburg | Summit | Energy Storage | Manufacturing |
| Technology Business Development LLC | North Ridgeville | Lorain | Biomass/Waste-To-Energy | Research, Development Consulting |
| Technology Management Inc. | Cleveland | Cuyahoga | Fuel Cells | Manufacturing |
| TekMark Growth Partners | Hudson | Summit | Fuel CellsOtherSolar | Consulting Professional Services |
| The Carmon Group | Avon | Lorain | Biomass/Waste-To-EnergyEnergy Efficient Building Materials & SystemsSolarWind Energy | Consulting Workforce Development |
| The Energy Factory | Akron | Summit | Energy Efficient Building Materials & Systems | Consulting |
| The Freedonia Group | Cleveland | Cuyahoga | Biomass/Waste-To-EnergyEnergy Efficient Building Materials & SystemsOtherSolarWind Energy | Research, Development |
| The Garland Company | Cleveland | Cuyahoga | Solar | Manufacturing |
| The Horsburgh & Scott Co. - Main Plant | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| The Horsburgh & Scott Co. - Repair Center | Euclid | Cuyahoga | Wind Energy | Manufacturing |
| The Lanly Company | Cleveland | Cuyahoga | Fuel Cells | Manufacturing |
| The Ohio State University ATI | Wooster | Wayne | Other | Education, Training |
| The Pipe Line Development Company | Westlake | Cuyahoga | Other | Manufacturing |
| The University of Akron Research Foundation | Akron | Summit | Energy StorageFuel Cells | Education, Training Research, Development |
| Thermatex Corporation | Newton Falls | Trumbull | Fuel CellsWind Energy | Manufacturing |
| ThetaSquared | Chardon | Geauga | Biomass/Waste-To-EnergyEnergy Efficient Building Materials & SystemsFuel CellsOtherSolarWind Energy | Consulting |
| Third Sun Solar | Akron | Summit | Solar | Energy Provider Installer Sales, Distribution |
| Timcal Graphite and Carbon | Westlake | Cuyahoga | Fuel Cells | Manufacturing |
| Timken Co. | Canton | Stark | Wind Energy | Manufacturing |
| Todayís Energy Solutions | Richfield | Summit | OtherWind Energy | Other |
| Torq Hoist Inc. | Cleveland | Cuyahoga | Wind Energy | Service Provider |
| Tradesmen International | Uniontown | Summit | Installer | |
| Tragus Environmental Consulting, Inc. | Akron | Summit | Wind Energy | Consulting |
| Transilience Energy Systems, Inc. | Brecksville | Cuyahoga | Transportation Electrification | Manufacturing |
| Trec Industries, Inc. | Brooklyn Hts | Cuyahoga | Other | Manufacturing |
| Tremco | Beachwood | Cuyahoga | Other | Manufacturing |
| Tremont Electric, LLC. | Cleveland | Cuyahoga | Other | Manufacturing |
| Truco Inc | Cleveland | Cuyahoga | Other | Manufacturing |
| TruSeal Technologies, Inc. | Solon | Cuyahoga | Energy Storage | Manufacturing |
| Tyco Electronics Corp | Mansfield | Richland | Biomass/Waste-To-EnergyEnergy Efficient Building Materials & SystemsFuel CellsOtherSolarWind Energy | Manufacturing |
| Tymoca Partners LLC, dba Federal Gear | Willoughby | Lake | Wind Energy | Manufacturing |
| UniControl Inc. | Cleveland | Cuyahoga | Biomass/Waste-To-EnergyEnergy Efficient Building Materials & Systems | Manufacturing |
| Uniflex (KST Coatings/ Sherwin-Williams) | Cleveland | Cuyahoga | Other | Manufacturing |
| United Tool & Gage Company | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| Universal Electric Power | Akron | Summit | Other | Energy Provider |
| University Clean Energy Alliance of Ohio (UCEAO) | Other | Other | ||
| University of Akron | Akron | Summit | Other | Education, Training Research, Development |
| Utility and Industrial Products | Medina | Medina | Other | Sales, Distribution |
| Vadose Research & Development LLC | Akron | Summit | Biomass/Waste-To-Energy | Manufacturing |
| Valley Electrical Consolidated Inc. | Girard | Trumbull | SolarWind Energy | Service Provider |
| Venture Lighting | Solon | Cuyahoga | Energy Storage | Manufacturing |
| VERITAS Consulting | Cleveland Heights | Cuyahoga | Consulting | |
| Vinylume Products Inc | Youngstown | Mahoning | Energy Storage | Manufacturing |
| Vista Window Company | Warren | Trumbull | Energy Storage | Manufacturing |
| Vogelsang | Ravenna | Portage | Biomass/Waste-To-Energy | Manufacturing |
| Walsh Manufacturing Corporation | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| Weatherking Heating and Air Conditioning | Northfield | Summit | Energy Efficient Building Materials & Systems | Installer |
| Weiss North America, Inc. | Willoughby | Lake | Wind Energy | Manufacturing |
| Wellman Products Group | Solon | Cuyahoga | Fuel Cells | Manufacturing |
| Wind Diverters | Hudson | Summit | Wind Energy | Research, Development |
| Wind Tech Solutions LLC | Fairlawn | Summit | Wind Energy | Consulting Installer Sales, Distribution |
| Wind Turbines of Ohio, LLC. | Alliance | Stark | Wind Energy | Installer Sales, Distribution |
| Windharness Development Corp. | Dennison | Tuscarawas | Wind Energy | Consulting |
| Wire-NET | Cleveland | Cuyahoga | OtherWind Energy | Other |
| WJJM Consulting LLC | Hudson | Summit | Fuel Cells | Research, Development Consulting |
| WLS Stamping & Fabricating | Cleveland | Cuyahoga | Wind Energy | Manufacturing |
| Woodling, Krost and Rust | Kirtland | Lake | Other | Professional Services |
| Wright Center for Sensor Systems Engineering | Cleveland | Cuyahoga | Other | Education, Training Investor Research, Development Testing (Labs) |
| Wright Tool | Barberton | Summit | Wind Energy | Manufacturing |
| XR3 Technologies, LLC | Cleveland | Cuyahoga | Smart GridTransportation Electrification | Manufacturing |
| Yoder Drilling and Geothermal | Sugarcreek | Tuscarawas | Energy Efficient Building Materials & SystemsOther | Installer |
| Youngstown State University | Youngstown | Mahoning | Other | Education, Training Research, Development |
| YXLON International Feinfocus Inc. | Mogadore | Summit | Fuel Cells | Testing (Labs) |
| Z & Z Manufacturing | Willoughby | Lake | Wind Energy | Manufacturing |
| Zircoa, Inc | Solon | Cuyahoga | Fuel Cells | Manufacturing |
| ZOOK Enterprises | Chagrin Falls | Cuyahoga | Fuel Cells | Manufacturing |
