| HIHyPro Inc. Platteville (PT) | Platteville | WI | 20–99 | ◐ LIKELY ACTIVE |
| IAI Am Machining LLC | Albuquerque | NM | — | ◐ LIKELY ACTIVE |
| IIIbis Industries, INC. | Santa Ana | CA | — | ◐ LIKELY ACTIVE |
| IMIckler Manufacturing LLC | Mooresville | NC | — | ◐ LIKELY ACTIVE |
| IIIdea Induction, LLC | Auburn Hills | MI | — | ◐ LIKELY ACTIVE |
| ISIdeal Supply, INC | Huntley | IL | — | ◐ LIKELY ACTIVE |
| IFIDI Fabrication, Inc. d.b.a. The Gund Company Inc. Noblesville | Noblesville | IN | 1–19 | ◐ LIKELY ACTIVE |
| IIIDM- I do machining | Elmira | NY | 20–99 | ◐ LIKELY ACTIVE |
| IIIds@work INC | Hallandale Beach | FL | — | ◐ LIKELY ACTIVE |
| ITIDT Tools | Frankfort | KY | 20–99 | ◐ LIKELY ACTIVE |
| IIIKS Industries, Inc. | Park Falls | WI | 20–99 | ◐ LIKELY ACTIVE |
| IPIlam Precision INC | San Jose | CA | — | ◐ LIKELY ACTIVE |
| ITIllinois Tool Works Electronic Assembly Equipment - Camdenton, MO 65020 | Camdenton | MO | 20–99 | ◐ LIKELY ACTIVE |
| IEImpres Engineering Services, LLC | Holland | MI | — | ◐ LIKELY ACTIVE |
| IHIMR - Hayden | North Vernon | IN | 20–99 | ◐ LIKELY ACTIVE |
| IMIncremental Machine LLC | Baltimore | MD | — | ◐ LIKELY ACTIVE |
| IWIndependent Welding & Machine LLC | Cocoa | FL | — | ◐ LIKELY ACTIVE |
Industrial Automation LLC - Alabama | Montgomery | AL | 1–19 | ◐ LIKELY ACTIVE |
| ICIndustrial Consortium INC | Lancaster | PA | — | ◐ LIKELY ACTIVE |
| IDIndustrial Design Manufacturing LLC | Mount Sterling | KY | — | ◐ LIKELY ACTIVE |
| IEIndustrial Equipment Division - North | Appleton | WI | 20–99 | ◐ LIKELY ACTIVE |
| IEIndustrial Equipment Division - South | Appleton | WI | 100–499 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG CA Design Raleigh | Raleigh | NC | 20–99 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG WakefieldNashua | Nashua | NH | 100–499 | ◐ LIKELY ACTIVE |
| IDInfastech, Decorah MFG (IND, EF) Emhart Tecknologies LLC | Decorah | IA | 100–499 | ◐ LIKELY ACTIVE |
| IGIn Good Hans LLC | Mesa | AZ | — | ◐ LIKELY ACTIVE |
| IGInland Gov. LLC | Riverside | CA | — | ◐ LIKELY ACTIVE |
| ITInlet Tools, INC | Conneautville | PA | — | ◐ LIKELY ACTIVE |
| IEInnovative Engineered Solutions | Wilmington | OH | 20–99 | ◐ LIKELY ACTIVE |
| IDInrock Drilling Systems | Houston | TX | 20–99 | ◐ LIKELY ACTIVE |
| IMIntegrated Machining CO | Albuquerque | NM | — | ◐ LIKELY ACTIVE |
| IMIntegrated Machining Solutions INC | Norwalk | CA | — | ◐ LIKELY ACTIVE |
| IIIntegration INC | Albuquerque | NM | — | ◐ LIKELY ACTIVE |
| IEIntegrity Engineering Holding, Inc | Ramsey | MN | 20–99 | ◐ LIKELY ACTIVE |
| IMIntegrity Machining, INC | Augusta | IL | — | ◐ LIKELY ACTIVE |
| IWIntegrity Welding LLC | Las Cruces | NM | — | ◐ LIKELY ACTIVE |
| IVIntellectual Ventures Property Holdings LLC | Bellevue | WA | — | ◐ LIKELY ACTIVE |
| IMInter-city Manufacturing, INC. | Seaside | CA | — | ◐ LIKELY ACTIVE |
| IQInternational Quality Advantage LLC | Windsor Mill | MD | — | ◐ LIKELY ACTIVE |
| ITInternational Thermal Systems | Wauwatosa | WI | 20–99 | ◐ LIKELY ACTIVE |
International Tool and Manufacturing, INC | Fairfield | NJ | — | ◐ LIKELY ACTIVE |
| ICIpsen Cherry Valley | Cherry Valley | IL | 100–499 | ◐ LIKELY ACTIVE |
| IIIpsen, Inc. Pecatonica | Pecatonica | IL | 1–19 | ◐ LIKELY ACTIVE |
| IIIpsen, Inc. Souderton | Souderton | PA | 20–99 | ◐ LIKELY ACTIVE |
| IMIsland Machine, INC | Everett | WA | — | ◐ LIKELY ACTIVE |
| ICItech Custom Manufacturing and Design INC. | Riviera Beach | FL | — | ◐ LIKELY ACTIVE |
| ICITW Commercial Construction North America | Paris | KY | 20–99 | ◐ LIKELY ACTIVE |
| ICITW Commercial Construction North America | Itasca | IL | 20–99 | ◐ LIKELY ACTIVE |
| ICITW Commercial Construction North America- Glenview | Glenview | IL | 20–99 | ◐ LIKELY ACTIVE |
| IHITW Heartland - Manufactured Products | Alexandria | MN | 20–99 | ◐ LIKELY ACTIVE |