| DWDayton Wheel Concepts INC | Dayton | OH | Transportation Equipment Manufacturing336322 | 20-99 | ◐ LIKELY ACTIVE |
| DSDefiance Stamping Company | Napoleon | OH | Fabricated Metal Product Manufacturing332116 | 20-99 | ◐ LIKELY ACTIVE |
Deimling/jeliho Plastics INC | Amelia | OH | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| DSDelta Systems INC | Streetsboro | OH | Computer and Electronic Product Manufacturing334413 | 100-499 | ◐ LIKELY ACTIVE |
| DSDependable Stamping Company | Euclid | OH | Fabricated Metal Product Manufacturing332116 | 20-99 | ◐ LIKELY ACTIVE |
| DMDie Matic CORP | Brooklyn Heights | OH | Fabricated Metal Product Manufacturing332116 | 20-99 | ◐ LIKELY ACTIVE |
| DEDillin Engineered Systems CORP. | Perrysburg | OH | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| DLDimex LLC | Marietta | OH | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
| DPDinesol Plastics Inc-Niles | Niles | OH | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
| DLDmax LTD | Moraine | OH | Machinery Manufacturing333618 | 500+ | ◐ LIKELY ACTIVE |
| DLDominion Liquid Technologies, LLC | Cincinnati | OH | Food Manufacturing311930 | 20-99 | ◐ LIKELY ACTIVE |
| DHDover High Performance Plastics | Dover | OH | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| DTDowa Tht America INC | Bowling Green | OH | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| DIDownhome Inc. | Cincinnati | OH | Textile Product Mills314120 | 100-499 | ◐ LIKELY ACTIVE |
| DPDrainage Products, INC. | Haviland | OH | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| DIDualite INC | Williamsburg | OH | Miscellaneous Manufacturing339950 | 100-499 | ◐ LIKELY ACTIVE |
| DPDuray Plating CO. | Cleveland | OH | Fabricated Metal Product Manufacturing332813 | 1-19 | ◐ LIKELY ACTIVE |
| DIDynalab INC | Reynoldsburg | OH | Computer and Electronic Product Manufacturing334417 | 20-99 | ◐ LIKELY ACTIVE |
| EIElite Industrial Controls | Berlin Heights 44814 | OH | Fabricated Metal Product Manufacturing332911 | 20-99 | ◐ LIKELY ACTIVE |
| EMEngineered Mobile Solutions INC | Batavia | OH | Transportation Equipment Manufacturing336212 | 20-99 | ◐ LIKELY ACTIVE |
| EOEnvases Ohio, LLC | Fremont | OH | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
| EIErico International CORP. | Solon | OH | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| EPEtna Products INC | Chagrin Falls | OH | Petroleum and Coal Products Manufacturing324191 | 20-99 | ◐ LIKELY ACTIVE |
| EHEuclid Heat Treat CO. | Euclid | OH | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| ENEurostampa North America | Cincinnati | OH | Printing and Related Support Activities323111 | 100-499 | ◐ LIKELY ACTIVE |
| EPEveready Products CORP | Cleveland | OH | Chemical Manufacturing325998 | 1-19 | ◐ LIKELY ACTIVE |
| EPEverhard Products INC | Canton | OH | Fabricated Metal Product Manufacturing332216 | 20-99 | ◐ LIKELY ACTIVE |
Exact Machine CORP | Sunbury | OH | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| FSFalls Stamping & Welding CO | Cuyahoga Falls | OH | Fabricated Metal Product Manufacturing332119 | 20-99 | ◐ LIKELY ACTIVE |
| FUFca US LLC | Toledo | OH | Transportation Equipment Manufacturing336110 | — | ◐ LIKELY ACTIVE |
| FUFca US LLC - Toledo Machining Plant (0387040123) | Perrysburg | OH | Transportation Equipment Manufacturing336330 | 100-499 | ◐ LIKELY ACTIVE |
Fecon, LLC | Lebanon | OH | Machinery Manufacturing333111 | 100-499 | ◐ LIKELY ACTIVE |
| FMFerroglobe Metallurgical | Waterford | OH | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| FIFiber-tech Industries INC | Washington Court House | OH | Wood Product Manufacturing321211 | 20-99 | ◐ LIKELY ACTIVE |
| FIFiber-tech Industries INC | Washington Court House | OH | Plastics and Rubber Products Manufacturing326130 | 20-99 | ◐ LIKELY ACTIVE |
| FPFindlay Products | Findlay | OH | Transportation Equipment Manufacturing336370 | 100-499 | ◐ LIKELY ACTIVE |
| FCFirst Choice Packaging | Fremont | OH | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| FBFiske Brothers Refining CO | Toledo | OH | Petroleum and Coal Products Manufacturing324191 | 20-99 | ◐ LIKELY ACTIVE |
| FIFlex-Strut, Inc. | Warren | OH | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| FMFlohr Machine Company, Incorporated | Barberton | OH | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| FRFort Recovery Industries INC | Fort Recovery | OH | Primary Metal Manufacturing331523 | 100-499 | ◐ LIKELY ACTIVE |
| FWFranke's Wood Products, INC. | Marysville | OH | Wood Product Manufacturing321920 | 20-99 | ◐ LIKELY ACTIVE |
| FPFresh Products, LLC | Perrysburg | OH | Chemical Manufacturing325612 | 100-499 | ◐ LIKELY ACTIVE |
| FTF T Precision | Fredericktown | OH | Machinery Manufacturing333612 | 100-499 | ◐ LIKELY ACTIVE |
| FCFulton County Processing LTD | Delta | OH | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| FIFulton Industries, LLC | Wauseon | OH | Fabricated Metal Product Manufacturing332116 | 20-99 | ◐ LIKELY ACTIVE |
| FCFusion Ceramics INC | Carrollton | OH | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| FGFuyao Glass America | Moraine | OH | Nonmetallic Mineral Product Manufacturing327215 | 500+ | ◐ LIKELY ACTIVE |
| GRGambrinus Roller | Canton | OH | Fabricated Metal Product Manufacturing332991 | 20-99 | ◐ LIKELY ACTIVE |
| GPGardner Pie Company | Akron | OH | Food Manufacturing311811 | 100-499 | ◐ LIKELY ACTIVE |