| HCHenkel Corporation | Port Huron | MI | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| HIHercules INC | Parchment | MI | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| HTHercules Tool & Die LLC | Warren | MI | Machinery Manufacturing333514 | — | ◇ UNVERIFIED |
| HPHeritage Propane Express | Reading | MI | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| HMHerman Miller INC | Holland | MI | Furniture and Related Product Manufacturing337214 | — | ◇ UNVERIFIED |
| HHH & H Metals Company | Inkster | MI | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| HWHickman Williams CO | Monroe | MI | Petroleum and Coal Products Manufacturing324199 | — | ◇ UNVERIFIED |
| HDHighwood Die & Engineering | Waterford | MI | Fabricated Metal Product Manufacturing332439 | — | ◇ UNVERIFIED |
| HTHilco Technologies | Armada | MI | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| HPHillsdale Pallet LLC | Hillsdale | MI | Wood Product Manufacturing321920 | 1-19 | ◇ UNVERIFIED |
| HTHillsdale Tool & Mfg CO | Jonesville | MI | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| HMHinkle Manufacturing, LLC | Dearborn | MI | Plastics and Rubber Products Manufacturing326112 | — | ◇ UNVERIFIED |
| HMHispanic Mfg / Gonzalez Mfg | Detroit | MI | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| HLH & L Tool-madison Hgts | Madison Heights | MI | Fabricated Metal Product Manufacturing332721 | — | ◇ UNVERIFIED |
| HPHms Products Company | Troy | MI | Machinery Manufacturing333921 | — | ◇ UNVERIFIED |
| HMHofley Mfg CO | Roseville | MI | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| HIHolcim (us) INC. D/b/a Lafarge Essexville Terminal | Essexville | MI | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| HHoneywell | Detroit | MI | Chemical Manufacturing325110 | — | ◇ UNVERIFIED |
| HCHowmet Corporation, Hrc and Plants 5 & 10 | Whitehall | MI | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| HPH P Pelzer | Port Huron | MI | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| HPHp Pelzer-sterling Heights | Sterling Heights | MI | Transportation Equipment Manufacturing336399 | — | ◇ UNVERIFIED |
| HRH R Technologies, INC | Madison Heights | MI | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| HCHti Cybernetics INC | Sterling Heights | MI | Machinery Manufacturing333992 | — | ◇ UNVERIFIED |
| HIHuhtamaki INC | Coleman | MI | Plastics and Rubber Products Manufacturing326112 | — | ◇ UNVERIFIED |
| HFHuntington Foam LLC (n6976) | Greenville | MI | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| HCHuntsman Corporation | Auburn Hills | MI | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| HVHuron Valley Steel CORP | Belleville | MI | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| HAHydro Aluminum Adrian INC | Adrian | MI | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| HAHydro Aluminum North America Kalamazoo Operation | Kalamazoo | MI | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| HSHydro-chem Systems, INC. | Grand Rapids | MI | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| IIIa INC | Ann Arbor | MI | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| IBIcg Berrien INC | Bridgman | MI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| IMIko Monroe INC | Monroe | MI | Paper Manufacturing322130 | — | ◇ UNVERIFIED |
| IAIllbruck Automotive Products INC | Howell | MI | Plastics and Rubber Products Manufacturing326150 | — | ◇ UNVERIFIED |
| IPImperial Plastics Manufacturing | North Branch | MI | Machinery Manufacturing333511 | — | ◇ UNVERIFIED |
| IRInalfa Roof Systems, Incorporated | Auburn Hills | MI | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| ISIndian Summer Co-op-hart | Hart | MI | Food Manufacturing311421 | — | ◇ UNVERIFIED |
| IAInergy Automotive Systems INC | Adrian | MI | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| IPInstaset Plastics | Anchorville | MI | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| IZInteramerican Zinc INC | Coldwater | MI | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| IIInterdyne INC | Jonesville | MI | Plastics and Rubber Products Manufacturing326291 | — | ◇ UNVERIFIED |
| IGInternal Grinding Abrasives | Grand Rapids | MI | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| IBInternational Bumper INC | Grand Rapids | MI | Transportation Equipment Manufacturing336000 | — | ◇ UNVERIFIED |
| IFInternational Foam & Trim | Jackson | MI | Plastics and Rubber Products Manufacturing326150 | — | ◇ UNVERIFIED |
| IPInternational Paint LLC | Pontiac | MI | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| IPInternational Paper | Three Rivers | MI | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| IPInternational Paper CO | Kalamazoo | MI | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| ICInvecast Corporation | Warren | MI | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| IRInventory Recovery Systems INC | Greenville | MI | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| ILIonbond LLC | Madison Heights | MI | Fabricated Metal Product Manufacturing332811 | — | ◇ UNVERIFIED |
