| GLGreat Lakes an Oldcastle Company | Sheffield | OH | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| GLGreat Lakes Sugar Company (0372030103) | Fremont | OH | Food Manufacturing311313 | — | ◇ UNVERIFIED |
| GDGreenbrier Development LLC | Cleveland | OH | Chemical Manufacturing325100 | — | ◇ UNVERIFIED |
| GLGreene Lyon Metals LLC | Jackson | OH | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| GIGreif INC (0819070068) | Greenville | OH | Fabricated Metal Product Manufacturing332439 | — | ◇ UNVERIFIED |
| GPGreif Packaging LLC (0381020108) | Van Wert | OH | Paper Manufacturing322214 | — | ◇ UNVERIFIED |
| GEGrelton Elevator INC | Malinta | OH | Food Manufacturing311111 | — | ◇ UNVERIFIED |
| GAGrimes Aerospace CO * | Urbana | OH | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| GMGrk Manufacturing CO. (1409040302) | Hamilton | OH | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| GSG & S Titanium INC | Wooster | OH | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| HDHaas Door CO | Perrysburg | OH | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| HPHadlock Plastics CORP. Plant 3 | Geneva | OH | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| HGHalcore Group INC Dba Horton Emergency Vehicles (0125094031) | Grove City | OH | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |
| HCHall Company, the (0511010104) | Urbana | OH | Printing and Related Support Activities323120 | — | ◇ UNVERIFIED |
| HSHamilton Standard Controls | Lexington | OH | Computer and Electronic Product Manufacturing334512 | — | ◇ UNVERIFIED |
| HPHamlet Protein INC. | Findlay | OH | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| HMHanover Marine | Fairport Harbor | OH | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| HIHarris-thomas Industries INC | Dayton | OH | Fabricated Metal Product Manufacturing332111 | — | ◇ UNVERIFIED |
| HMHarry Masser CO INC | Columbus | OH | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| HMHarsco Metals - Warren | Warren | OH | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| HMHartzell Mfg CO INC (0857092018) | Miamisburg | OH | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| HEHeartland Engineered Products LLC | Harrison | OH | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| HPHebco Products INC | Bucyrus | OH | Transportation Equipment Manufacturing336340 | — | ◇ UNVERIFIED |
| HMHeidelberg Materials US Cement LLC | Cleveland | OH | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HMHeidelberg Materials US Cement LLC | Plain, Township of | OH | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| HFHeinz Frozen Food CO | Massillon | OH | Food Manufacturing311412 | — | ◇ UNVERIFIED |
| HEHelwig Enterprises INC. | Shandon | OH | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| HTHendrickson Trailer Commercial Vehicle Systems (1576051608) | Canton | OH | Transportation Equipment Manufacturing336330 | — | ◇ UNVERIFIED |
| HEHeritage Environmental Services, LLC (rotochopper Rg-1) | Lockland | OH | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| HIHeritage Industrial Finishing | Akron | OH | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| HIHeritage Industrial Finishing (1677011297) | Akron | OH | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| HMHeritage Marble of Ohio INC | Columbus | OH | Plastics and Rubber Products Manufacturing326191 | — | ◇ UNVERIFIED |
| HSHeritage Stone | Zanesville | OH | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| HCHess & Clark INC | Ashland | OH | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| HCHexcel Composites | Lancaster | OH | Textile Mills313320 | — | ◇ UNVERIFIED |
| HLHfi LLC | Columbus | OH | Transportation Equipment Manufacturing336360 | — | ◇ UNVERIFIED |
| HLHfi, LLC (0125034004) | Canal Winchester | OH | Transportation Equipment Manufacturing336360 | — | ◇ UNVERIFIED |
| HLHfi, LLC. - Green Pointe Dr | Groveport | OH | Transportation Equipment Manufacturing336360 | — | ◇ UNVERIFIED |
| HHH H Electronics INC | Twinsburg | OH | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| HVHilco Vision | Fairfield | OH | Miscellaneous Manufacturing339115 | — | ◇ UNVERIFIED |
| HLHinkley Lighting | Cleveland | OH | Electrical Equipment, Appliance & Component Manufacturing335121 | — | ◇ UNVERIFIED |
| HTHi Tec Metal Group INC - Hydrovac | Cleveland | OH | Fabricated Metal Product Manufacturing332811 | — | ◇ UNVERIFIED |
| HCHobart Cabinet CO | Troy | OH | Furniture and Related Product Manufacturing337214 | — | ◇ UNVERIFIED |
| HPHolland Paving | Cleveland | OH | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| HSHolmes Supply CORP | Holmesville | OH | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| HPHolophane Pataskala Plant | Pataskala | OH | Electrical Equipment, Appliance & Component Manufacturing335122 | — | ◇ UNVERIFIED |
| HUHolophane Utica Plant | Utica | OH | Electrical Equipment, Appliance & Component Manufacturing335122 | — | ◇ UNVERIFIED |
| HFHomestead Furniture | Fredericksburg | OH | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| HEHorton Emergency Vehicle CO | Grove City | OH | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |
| HIHospira INC | Ashland | OH | Plastics and Rubber Products Manufacturing326299 | — | ◇ UNVERIFIED |
