| AGAccel Group Inc. | Wadsworth | OH | Furniture and Related Product Manufacturing337212 | 20-99 | ◐ LIKELY ACTIVE |
| AIAco, INC (0243082019) | Mentor | OH | Plastics and Rubber Products Manufacturing326121 | — | ◐ LIKELY ACTIVE |
| ATAcro Tool and Die CO | Akron | OH | Machinery Manufacturing333514 | 20-99 | ◐ LIKELY ACTIVE |
| ATAda Technologies, Inc. | Ada | OH | Transportation Equipment Manufacturing336350 | 100-499 | ◐ LIKELY ACTIVE |
Adm Fostoria | Fostoria | OH | Food Manufacturing311222 | — | ◐ LIKELY ACTIVE |
| AFAdvanced Fiber Technology | Bucyrus | OH | Chemical Manufacturing325220 | 20-99 | ◐ LIKELY ACTIVE |
| ACAeroquip Corporation | Van Wert | OH | Fabricated Metal Product Manufacturing332912 | — | ◐ LIKELY ACTIVE |
| ACAexcel Corporation | Mentor | OH | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| AAirecon | Cincinnati | OH | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| ADAkron Dispersions, Inc. | Akron | OH | Chemical Manufacturing325998 | 20-99 | ◐ LIKELY ACTIVE |
| AFAkron Foundry Company | Akron | OH | Primary Metal Manufacturing331524 | 500+ | ◐ LIKELY ACTIVE |
| APAkron Polymer Systems INC | Cuyahoga Falls | OH | Chemical Manufacturing325211 | 1-19 | ◐ LIKELY ACTIVE |
| AIAlacriant INC | Streetsboro | OH | Fabricated Metal Product Manufacturing332311 | 100-499 | ◐ LIKELY ACTIVE |
| AIAlcon Industries, INC. (1318007755) | Cleveland | OH | Primary Metal Manufacturing331512 | — | ◐ LIKELY ACTIVE |
| AMAllied Moulded Products, INC. (0386010104) | Bryan | OH | Plastics and Rubber Products Manufacturing326199 | — | ◐ LIKELY ACTIVE |
| ACAllpass Corporation | Madison | OH | Plastics and Rubber Products Manufacturing326191 | 20-99 | ◐ LIKELY ACTIVE |
| ATAlpha Tool & Mold INC | Cleveland | OH | Fabricated Metal Product Manufacturing332999 | 1-19 | ◐ LIKELY ACTIVE |
| ABAltenloh, Brinck & CO. U.s., INC | Pioneer | OH | Fabricated Metal Product Manufacturing332811 | 100-499 | ◐ LIKELY ACTIVE |
| AIAluchem INC | Cincinnati | OH | Paper Manufacturing322110 | 20-99 | ◐ LIKELY ACTIVE |
American Aluminum Extrusions of Ohio LLC | Canton | OH | Primary Metal Manufacturing331314 | 20-99 | ◐ LIKELY ACTIVE |
American Apex Corporation | Delaware | OH | Transportation Equipment Manufacturing336992 | 1-19 | ◐ LIKELY ACTIVE |
| AAAmerican Augers | West Salem | OH | Machinery Manufacturing333120 | 100-499 | ◐ LIKELY ACTIVE |
| AEAmerican Electric Power Gavin Plant | Cheshire | OH | Petroleum and Coal Products Manufacturing324199 | — | ◐ LIKELY ACTIVE |
| AHAmerican Howa of Ohio | Delaware | OH | Transportation Equipment Manufacturing336360 | 20-99 | ◐ LIKELY ACTIVE |
| ATAmerican Trim | Sidney | OH | Fabricated Metal Product Manufacturing332116 | — | ◐ LIKELY ACTIVE |
| ATAmerican Trim LLC Pc3 | Wapakoneta | OH | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |
| ASAmericas Styrenics LLC | Marietta | OH | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| AVAmg Vanadium LLC | Zanesville | OH | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| AMAnchor Manufacturing Group, INC. | Cleveland | OH | Transportation Equipment Manufacturing336370 | 100-499 | ◐ LIKELY ACTIVE |
| ACAnomatic CORP (0145000510) | New Albany | OH | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |
| ATApex Tool Group, LLC | Dayton | OH | Fabricated Metal Product Manufacturing332212 | — | ◐ LIKELY ACTIVE |
| AMAppian Manufacturing Corp | Columbus | OH | Fabricated Metal Product Manufacturing332996 | 20-99 | ◐ LIKELY ACTIVE |
| ASApplied Scientific International LLC | Englewood | OH | Nonmetallic Mineral Product Manufacturing327910 | 1-19 | ◐ LIKELY ACTIVE |
| ASApplied Specialties LLC (Avon Lake) | Avon Lake | OH | Chemical Manufacturing325998 | 20-99 | ◐ LIKELY ACTIVE |
| AMAps Materials INC * | Dayton | OH | Fabricated Metal Product Manufacturing332812 | 100-499 | ◐ LIKELY ACTIVE |
| ALArboris LLC | Newark | OH | Chemical Manufacturing325191 | 20-99 | ◐ LIKELY ACTIVE |
| AMArdagh Metal Packaging USA CORP | Whitehouse | OH | Fabricated Metal Product Manufacturing332431 | — | ◐ LIKELY ACTIVE |
| AMArdagh Metal Packaging USA CORP. (0372030005) | Fremont | OH | Fabricated Metal Product Manufacturing332431 | — | ◐ LIKELY ACTIVE |
| ACArizona Chemical Company, LLC | Dover | OH | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| ALArthur Louis Steel Company, INC | Geneva | OH | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
Arzel Technology INC. | Cleveland | OH | Computer and Electronic Product Manufacturing334512 | 1-19 | ◐ LIKELY ACTIVE |
| AWAshley Ward | Mason | OH | Fabricated Metal Product Manufacturing332722 | 20-99 | ◐ LIKELY ACTIVE |
| ACASK Chemicals LLC - Headquarters | Dublin | OH | Chemical Manufacturing325998 | 20-99 | ◐ LIKELY ACTIVE |
| APAstrazeneca Pharmaceutical LP | West Chester | OH | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| ACAstro Coatings INC | Struthers | OH | Primary Metal Manufacturing331318 | — | ◐ LIKELY ACTIVE |
| AOAts Ohio INC | Lewis Center | OH | Machinery Manufacturing333298 | 100-499 | ◐ LIKELY ACTIVE |
| AHAuria Homesville LLC | Holmesville | OH | Transportation Equipment Manufacturing336360 | 100-499 | ◐ LIKELY ACTIVE |
Austin Powder Emulsion | Mc Arthur | OH | Chemical Manufacturing325920 | — | ◐ LIKELY ACTIVE |
| ASAutotec Solutions | Toledo | OH | Machinery Manufacturing333249 | 20-99 | ◐ LIKELY ACTIVE |
| ATAuto Temp, INC. | Batavia | OH | Nonmetallic Mineral Product Manufacturing327215 | 100-499 | ◐ LIKELY ACTIVE |