Harris Welding and Machine Company | Ashland | — | ● ACTIVE |
Hartzell Fan, INC. | Piqua | — | ● ACTIVE |
| HTHk Technologies INC | Salem | 1–19 | ● ACTIVE |
Infosight Corporation | Chillicothe | — | ● ACTIVE |
Interscope Manufacturing INC | Middletown | — | ● ACTIVE |
| JIJlg Industries, INC. | Orrville | — | ● ACTIVE |
Kc Robotics INC | West Chester | 20–99 | ● ACTIVE |
Kennametal INC | Whitehouse | — | ● ACTIVE |
Kennametal INC | Orwell | — | ● ACTIVE |
Komar Industries, LLC | Groveport | — | ● ACTIVE |
Kornylak CORP | Hamilton | — | ● ACTIVE |
Kraft Werks Engineering LLC | Medina | — | ● ACTIVE |
Lanly CO | Euclid | 20–99 | ● ACTIVE |
Laser Fusion Solutions LLC | Fairborn | — | ● ACTIVE |
Luxfer Magtech, INC. | Cincinnati | — | ● ACTIVE |
Machine Concepts INC | Minster | 100–499 | ● ACTIVE |
| MIMakino INC | Mason | — | ● ACTIVE |
Martindale Electric Company, the | Lakewood | 20–99 | ● ACTIVE |
Meta Manufacturing CORP | Blue Ash | — | ● ACTIVE |
Micropyretics Heaters International INC | Cincinnati | — | ● ACTIVE |
Midwest Specialties INC | Wapakoneta | — | ● ACTIVE |
Minnich Manufacturing CO INC | Mansfield | 20–99 | ● ACTIVE |
Modula INC | Franklin | 100–499 | ● ACTIVE |
Numalliance-north America, INC. | Lebanon | 20–99 | ● ACTIVE |
Osi Environmental LLC | N Royalton | — | ● ACTIVE |
Pmc Gage, INC | Willoughby | — | ● ACTIVE |
Pme of Ohio, INC | Cincinnati | — | ● ACTIVE |
Polymet Corporation | Fairfield | 20–99 | ● ACTIVE |
Princeton Tool INC | Mentor | — | ● ACTIVE |
Prospect Mold & Die Company | Cuyahoga Falls | 100–499 | ● ACTIVE |
Quintus Technologies, LLC | Lewis Center | 20–99 | ● ACTIVE |
Ransom & Randolph LLC | Maumee | 20–99 | ● ACTIVE |
Ready Technology, INC | Dayton | 20–99 | ● ACTIVE |
Remlinger Manufacturing CO INC | Kalida | — | ● ACTIVE |
Renk America Marine & Industry LLC | Cincinnati | 20–99 | ● ACTIVE |
R & J Cylinder & Machine, INC | New Philadelphia | 20–99 | ● ACTIVE |
| RMRosewood Machine and Tool CO. | Rosewood | 20–99 | ● ACTIVE |
R.p. Gatta, INC. | Aurora | — | ● ACTIVE |
R. W. Martin and Sons INC | Kent | 20–99 | ● ACTIVE |
| SSSeven Stones Projects CORP | Mentor | — | ● ACTIVE |
Singleton CORP | Cleveland | — | ● ACTIVE |
Sroka INC. | Strongsville | — | ● ACTIVE |
| TMTe-co Manufacturing LLC | Union | 20–99 | ● ACTIVE |
Tetra Mold & Tool, INC. | New Carlisle | 20–99 | ● ACTIVE |
| TGThe Gorman-rupp Company | Mansfield | 100–499 | ● ACTIVE |
| TLThe Lincoln Electric Company | Mentor | 500+ | ● ACTIVE |
The Ultra-met Company | Urbana | — | ● ACTIVE |
T. J. Davies Company, INC. | Mantua | — | ● ACTIVE |
| TITrucut INC | Sebring | 20–99 | ● ACTIVE |
Tykma Electrox, LLC | Chillicothe | 20–99 | ● ACTIVE |