| ICIndustrial Consortium INC | Lancaster | PA | — | ◐ LIKELY ACTIVE |
| IDIndustrial Design Manufacturing LLC | Mount Sterling | KY | — | ◐ LIKELY ACTIVE |
| IEIndustrial Engineering Manufacturing Co, INC | Foxboro | MA | — | ▲ REPORTED CLOSED |
| IFIndustrial Fabrication LLC | Bridgman | MI | 20–99 | ◐ LIKELY ACTIVE |
| IFIndustrial Fabrication Resources INC. | Knoxville | TN | — | ▲ REPORTED CLOSED |
| IFIndustrial Fabrics Incorporated BR | Baton Rouge | LA | 20–99 | ◐ LIKELY ACTIVE |
| IFIndustrial Fabrics Incorporated New Roads | New Roads | LA | 20–99 | ◐ LIKELY ACTIVE |
| IMIndustrial Manufacturing Services | Lancaster | SC | 20–99 | ◐ LIKELY ACTIVE |
| IMIndustrial Metal Works LLC | Newtown | CT | — | ◐ LIKELY ACTIVE |
| IMIndustrial Models Group, Inc | Gainesville | TX | 20–99 | ◐ LIKELY ACTIVE |
| IPIndustrial Products and Sales, LLC | Portsmouth | VA | — | ◐ LIKELY ACTIVE |
| IPIndustrial Products Group, LLC | Chesapeake | OH | — | ◐ LIKELY ACTIVE |
| IRIndustrial Resources, Inc. | Fairmont | WV | 20–99 | ◐ LIKELY ACTIVE |
| IRIndustrial Rigging Services of Central Texas | Hewitt | TX | 20–99 | ◐ LIKELY ACTIVE |
| ISIndustrial Steel South LLC | Rockledge | FL | 1–19 | ◐ LIKELY ACTIVE |
| ISIndustrial Stripping Services LLC | Grand Rapids | MI | 20–99 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG CA Design Raleigh | Raleigh | NC | 20–99 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG Davies | Carol Stream | IL | 100–499 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG Field Controls | Kinston | NC | 100–499 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG Precision Engineering | Uxbridge | MA | 20–99 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG WakefieldNashua | Nashua | NH | 100–499 | ◐ LIKELY ACTIVE |
| ITIndustrial Tool & Plastics, INC. | Saint Croix Falls | WI | — | ◐ LIKELY ACTIVE |
| IVIndustrial Ventilation, Inc. - PA | Pasco | WA | 20–99 | ◐ LIKELY ACTIVE |
| IIndy | Indianapolis | IN | 1–19 | ◐ LIKELY ACTIVE |
| IIIN-FAB Inc. | Bedford | IN | 20–99 | ◐ LIKELY ACTIVE |
| IDInfastech, Decorah MFG (IND, EF) Emhart Tecknologies LLC | Decorah | IA | 100–499 | ◐ LIKELY ACTIVE |
| IEInfin8 Enterprises LLC | Bixby | OK | — | ◐ LIKELY ACTIVE |
| IDInfinity Drain LTD | Amityville | NY | 100–499 | ◐ LIKELY ACTIVE |
| IHInfinium HQ | Strongsville | OH | 100–499 | ◐ LIKELY ACTIVE |
| IOInfinium Operations Texas, LLC | Corpus Christi | TX | 20–99 | ◐ LIKELY ACTIVE |
| IVInfluunt Vascular INC | Acton | MA | — | ◐ LIKELY ACTIVE |
| ILInfomass LLC | Pearland | TX | — | ◐ LIKELY ACTIVE |
| IInfoSeal | Roanoke | VA | 20–99 | ◐ LIKELY ACTIVE |
| ITInfrared Tools LLC | Crofton | MD | — | ◐ LIKELY ACTIVE |
| IFInfrastructure Fabrication LLC | Bath | PA | — | ◐ LIKELY ACTIVE |
| ICIngevity - Covington Carbon Plant | Covington | VA | 100–499 | ◐ LIKELY ACTIVE |
| IMInland Midwest Corporation | Elmhurst | IL | 20–99 | ◐ LIKELY ACTIVE |
| ITInlet Tools, INC | Conneautville | PA | — | ◐ LIKELY ACTIVE |
| ISIn-mar Solutions LLC | Gonzales | LA | — | ◐ LIKELY ACTIVE |
| IMIn Mar Systems INC | Gonzales | LA | — | ◐ LIKELY ACTIVE |
| IBInner Banks Diesel, INC | Bath | NC | — | ◐ LIKELY ACTIVE |
| ICInner City Bleu S LLC | Detroit | MI | — | ◐ LIKELY ACTIVE |
| ICInnerwood & Company | Milford | OH | 20–99 | ◐ LIKELY ACTIVE |
| IWInnisfallen Works | Springfield | OH | 20–99 | ◐ LIKELY ACTIVE |
| IFInnovation First Manufacturing, Inc. | Greenville | TX | 20–99 | ◐ LIKELY ACTIVE |
| IMInnovations Manufacturing INC | Redding | CA | — | ◐ LIKELY ACTIVE |
| IAInnovative Aspects LLC | Houston | TX | — | ▲ REPORTED CLOSED |
| IEInnovative Engineered Solutions | Wilmington | OH | 20–99 | ◐ LIKELY ACTIVE |
| IQInnovative Quality Solutions, LLC | Grandview | MO | — | ◐ LIKELY ACTIVE |
| ISInnovative Science LLC | Lakeway | TX | — | ◐ LIKELY ACTIVE |
| ITInnovent Technologies, LLC/Main Office - Peaboby, MA | Peabody | MA | 20–99 | ◐ LIKELY ACTIVE |
| IEINOAC Exterior Systems | Livingston | TN | 100–499 | ◐ LIKELY ACTIVE |
| IOIn Our Gear, LLC | Manchester | MD | — | ◐ LIKELY ACTIVE |
| IDInrock Drilling Systems | Houston | TX | 20–99 | ◐ LIKELY ACTIVE |
| IIInstadiagnostics INC. | Philadelphia | PA | — | ◐ LIKELY ACTIVE |
| ISInstrument Specialties Company, INC. | Boonton | NJ | — | ◐ LIKELY ACTIVE |
| ICInsulet Corporation | Irvine California | CA | 20–99 | ◐ LIKELY ACTIVE |
| IIInteccon, INC. | Boca Raton | FL | — | ◐ LIKELY ACTIVE |
| IIIn'Tech Industries Ramsey | Ramsey, Mn | MN | 20–99 | ◐ LIKELY ACTIVE |
| INInteger N2 Surface Technologies | Woonsocket | MA | 20–99 | ◐ LIKELY ACTIVE |
| IQInteger, QKT | Quakertown | PA | 20–99 | ◐ LIKELY ACTIVE |
| IFIntegral Fabrication & Engineering, LLC | Orlando | FL | — | ◐ LIKELY ACTIVE |
| IPIntegra Pain Management | West Valley | UT | 20–99 | ◐ LIKELY ACTIVE |
| IPIntegratech Proteomics, LLC | Salt Lake City | UT | — | ◐ LIKELY ACTIVE |
| IMIntegrated Machining CO | Albuquerque | NM | — | ◐ LIKELY ACTIVE |
| IMIntegrated Machining Solutions INC | Norwalk | CA | — | ◐ LIKELY ACTIVE |
| IMIntegrated Manufacturing INC. | Tamuning | GU | — | ◐ LIKELY ACTIVE |
| IMIntegrated Molding Solutions, INC. | Houston | TX | — | ◐ LIKELY ACTIVE |
| IPIntegrated Packaging Machinery | Rockford | MI | 100–499 | ◐ LIKELY ACTIVE |
| IIIntegration INC | Albuquerque | NM | — | ◐ LIKELY ACTIVE |
| IIIntegricoat, INC. | Spring Lake | MI | — | ◐ LIKELY ACTIVE |
| IEIntegrity Engineering Holding, Inc | Ramsey | MN | 20–99 | ◐ LIKELY ACTIVE |
| IMIntegrity Machining, INC | Augusta | IL | — | ◐ LIKELY ACTIVE |
| IOIntelico of Delaware Valley | Paulsboro | NJ | 20–99 | ◐ LIKELY ACTIVE |
| IVIntellectual Ventures Property Holdings LLC | Bellevue | WA | — | ◐ LIKELY ACTIVE |
| IIIntellewave, INC | New Port Richey | FL | — | ◐ LIKELY ACTIVE |
| ISIntellifab Solutions LLC | Atlanta | GA | — | ◐ LIKELY ACTIVE |
| ICIntelligent Composites LLC | Milwaukee | WI | — | ◐ LIKELY ACTIVE |
| IIIntelligent Imaging Innovations, INC | Denver | CO | — | ◐ LIKELY ACTIVE |
| IIntelliPole | Belton | SC | 1–19 | ◐ LIKELY ACTIVE |
| ICInter-city Contracting, INC | Smithfield | RI | — | ◐ LIKELY ACTIVE |
| IMInter-city Manufacturing, INC. | Seaside | CA | — | ◐ LIKELY ACTIVE |
| IIntercontinentalChemicalCorporation | Cincinnati | OH | 1–19 | ◐ LIKELY ACTIVE |
| IDInterior Designs By Ricci, INC | Newport Beach | CA | — | ◐ LIKELY ACTIVE |
| IMInterior Mobile Welding & Services INC | Fairbanks | AK | — | ◐ LIKELY ACTIVE |
| IMInterlake Mecalux, Inc | Denton | TX | 20–99 | ◐ LIKELY ACTIVE |
| IMInterlake Mecalux San Diego | San Diego | CA | 1–19 | ◐ LIKELY ACTIVE |
| IAInternational Automated Systems INC | Andover | MN | — | ◐ LIKELY ACTIVE |
| IAInternational Automated Systems INC | Baldwin | WI | — | ◐ LIKELY ACTIVE |
| IAInternational Automotive Components | Sturgis | MI | 1–19 | ◐ LIKELY ACTIVE |
International Computer Appliances Corporation | Minneapolis | MN | 100–499 | ◐ LIKELY ACTIVE |
| ICinternational cooling tower | Deer Park | TX | 100–499 | ◐ LIKELY ACTIVE |
| IEInternational Environmental Corporation | Oklahoma City | OK | 100–499 | ◐ LIKELY ACTIVE |
| IMInternational Marble Inc - Woodstock | Woodstock | GA | 20–99 | ◐ LIKELY ACTIVE |
| IQInternational Quality Advantage LLC | Windsor Mill | MD | — | ◐ LIKELY ACTIVE |
International Tool and Manufacturing, INC | Fairfield | NJ | — | ◐ LIKELY ACTIVE |
| IAInterroll Atlanta, LLC | Hiram | GA | 100–499 | ◐ LIKELY ACTIVE |
| IAIntersand America Corp | Windsor | CO | 20–99 | ◐ LIKELY ACTIVE |
| IFInterstate Foam & Supply, Inc. Plant 5 | Conover | NC | 20–99 | ◐ LIKELY ACTIVE |
| IFInterstate Foam & Supply, Inc. Plant 7 | Conover | NC | 1–19 | ◐ LIKELY ACTIVE |