| IFIndustrial Fabrics Incorporated New Roads | New Roads | LA | 20–99 | ◐ LIKELY ACTIVE |
| IHIndustrial Heat Treat LLC | Salt Lake City | UT | — | ◐ LIKELY ACTIVE |
| IIINDUSTRIAL IRON WORKS, INC., dba ADAMS FERTILIZER EQUIPMENT | Dewitt | AR | 100–499 | ◐ LIKELY ACTIVE |
| IMIndustrial Maintenance and Welding | Chicago | IL | 100–499 | ◐ LIKELY ACTIVE |
| IMIndustrial Manufacturing Services | Lancaster | SC | 20–99 | ◐ LIKELY ACTIVE |
| IMIndustrial Metal Enterprises LLC | Blackfoot | ID | 20–99 | ◐ LIKELY ACTIVE |
| IMIndustrial Metal Works LLC | Newtown | CT | — | ◐ LIKELY ACTIVE |
| IMIndustrial Mold Manufacturer | Grafton | WI | 20–99 | ◐ LIKELY ACTIVE |
| IPIndustrial Panel Solutions, Inc. | Omaha | NE | 1–19 | ◐ LIKELY ACTIVE |
| IPIndustrial Performance Group | Beaver City | NE | 20–99 | ◐ LIKELY ACTIVE |
| IPIndustrial Products | Coon Rapids | MN | 20–99 | ◐ LIKELY ACTIVE |
| IPIndustrial Products and Sales, LLC | Portsmouth | VA | — | ◐ 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 Tank & Containment INC | Brookfield | OH | — | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG Bartell | Rome | NY | 100–499 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG CA Design Raleigh | Raleigh | NC | 20–99 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG Electric Eel | Springfield | OH | 20–99 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG Field Controls | Kinston | NC | 100–499 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG Insight Vision | Saukville, WI | WI | 1–19 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG Precision Engineering | Uxbridge | MA | 20–99 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG Spartan Tool | Niles | MI | 100–499 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG Versatile Mold and Design | Rutledge | GA | 20–99 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG WakefieldNashua | Nashua | NH | 100–499 | ◐ LIKELY ACTIVE |
| IWIndustrial Welding & Supply Co. | Sterling | CO | 20–99 | ◐ LIKELY ACTIVE |
| IFIndustries- Fresno | Fresno | CA | 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 |
Infinity Edm, LLC | Jackson | WI | — | ◐ LIKELY ACTIVE |
| IFInfinity Fabrication, INC. | Marysville | WA | — | ◐ LIKELY ACTIVE |
| IFInfinity Finishing Services, Inc. | Fort Worth | TX | 1–19 | ◐ LIKELY ACTIVE |
| IPInfinity Plast Automotive | Montgomery | AL | 20–99 | ◐ LIKELY ACTIVE |
| IDIn-flo Designs | Santa Clara | CA | — | ◐ LIKELY ACTIVE |
| IVInfluunt Vascular INC | Acton | MA | — | ◐ LIKELY ACTIVE |
| IInfoSeal | Roanoke | VA | 20–99 | ◐ LIKELY ACTIVE |
| IFInfrastructure Fabrication LLC | Bath | PA | — | ◐ LIKELY ACTIVE |
| IGIn Good Hans LLC | Mesa | AZ | — | ◐ LIKELY ACTIVE |
| IGInland Gov. LLC | Riverside | CA | — | ◐ LIKELY ACTIVE |
| IMInland Midwest Corporation | Elmhurst | IL | 20–99 | ◐ LIKELY ACTIVE |
| INInland NW Metallurgical | Spokane Valley | WA | 1–19 | ◐ LIKELY ACTIVE |
| ITInlet Tools, INC | Conneautville | PA | — | ◐ LIKELY ACTIVE |
| IFInline Filling Systems | Palmetto | FL | 20–99 | ◐ LIKELY ACTIVE |
| ICInner City Bleu S LLC | Detroit | MI | — | ◐ LIKELY ACTIVE |
| IAInnerface Architectural Signage INC | Atlanta | GA | — | ◐ LIKELY ACTIVE |
| IWInnisfallen Works | Springfield | OH | 20–99 | ◐ LIKELY ACTIVE |