| ITIndependent Technologies, LLC | Blair | NE | — | ◐ LIKELY ACTIVE |
| IIndigo | Auburn Hilles | MI | 20–99 | ◐ LIKELY ACTIVE |
| ITIndipro Tools CORP. | Franklin Square | NY | — | ◐ LIKELY ACTIVE |
| ICIndustrial Connections & Solutions LLC | Cary | NC | — | ◐ LIKELY ACTIVE |
| IDIndustrial Drives and Controls, Inc. | Waterbury | CT | 20–99 | ◐ LIKELY ACTIVE |
| IFIndustrial Fabrics Incorporated BR | Baton Rouge | LA | 20–99 | ◐ LIKELY ACTIVE |
| IFIndustrial Fabrics Incorporated New Roads | New Roads | LA | 20–99 | ◐ LIKELY ACTIVE |
| IPIndustrial Panel Solutions, Inc. | Omaha | NE | 1–19 | ◐ LIKELY ACTIVE |
| ISIndustrial Service and Supply, INC | Gilbert | AZ | — | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG Electric Eel | Springfield | OH | 20–99 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG Insight Vision | Saukville, WI | WI | 1–19 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG Spartan Tool | Niles | MI | 100–499 | ◐ LIKELY ACTIVE |
| ITIndustrial Test Equipment Company, INC. | Port Washington | NY | — | ◐ LIKELY ACTIVE |
| IFIndustries- Fresno | Fresno | CA | 20–99 | ◐ LIKELY ACTIVE |
| IEInfin8 Enterprises LLC | Bixby | OK | — | ◐ LIKELY ACTIVE |
| ICInfinetix CORP | Spokane Valley | WA | 1–19 | ◐ LIKELY ACTIVE |
| ITInfinid Technologies, INC | Pasadena | CA | — | ▲ REPORTED CLOSED |
| IIInfitec, Inc. | East Syracuse | NY | 20–99 | ◐ LIKELY ACTIVE |
| ILInfomass LLC | Pearland | TX | — | ◐ LIKELY ACTIVE |
| IRInformation Radio Technology INC. | Cleveland | OH | — | ▲ REPORTED CLOSED |
| IPInfrared Power Systems, LLC | Saint Petersburg | FL | — | ◐ LIKELY ACTIVE |
| IMinMusic MMI - Citizens Times | Asheville | NC | 20–99 | ◐ LIKELY ACTIVE |
| IMinMusic MMI Weaverville | Weaverville | NC | 20–99 | ◐ LIKELY ACTIVE |
| ICInner City Bleu S LLC | Detroit | MI | — | ◐ LIKELY ACTIVE |
| INInnomotics New Kensington | New Kensington | PA | 100–499 | ◐ LIKELY ACTIVE |
| IInnova | Houston | TX | 100–499 | ◐ LIKELY ACTIVE |
| IInnovation | San Jose | CA | 500+ | ◐ LIKELY ACTIVE |
| ISInnovative Science LLC | Lakeway | TX | — | ◐ LIKELY ACTIVE |
| ISInnovative Solar Solutions, L.l.c. | Bainbridge | NY | — | ◐ LIKELY ACTIVE |
| IIInnovativetek, INC. | Upland | CA | — | ◐ LIKELY ACTIVE |
| ITInnovent Technologies, LLC/Main Office - Peaboby, MA | Peabody | MA | 20–99 | ◐ LIKELY ACTIVE |
| IMInnoversa Mobile Solutions LP | Raleigh | NC | 20–99 | ◐ LIKELY ACTIVE |
| ILInotek LLC | Layton | UT | — | ◐ LIKELY ACTIVE |
| IOIn Our Gear, LLC | Manchester | MD | — | ◐ LIKELY ACTIVE |
| ILInPro/Seal, LLC d/b/a FW Murphy Production Control | San Antonio | TX | 1–19 | ◐ LIKELY ACTIVE |
| ILInPro/Seal, LLC d/b/a FW Murphy Production Controls | Tulsa | OK | 1–19 | ◐ LIKELY ACTIVE |
| ILInPro/Seal, LLC d/b/a FW Murphy Production Controls | Rosenberg | TX | 100–499 | ◐ LIKELY ACTIVE |
| IOInput Output Technology, INC | Ventura | CA | — | ◐ LIKELY ACTIVE |
| ISIn-Situ - Service and Rentals | Fort Collins | CO | 1–19 | ◐ LIKELY ACTIVE |
| ISInstrument Specialties Company, INC. | Boonton | NJ | — | ◐ LIKELY ACTIVE |
| ISIntact Sl INC | Bronx | NY | — | ◐ LIKELY ACTIVE |
| IIInteccon, INC. | Boca Raton | FL | — | ◐ LIKELY ACTIVE |
| IPIntegratech Proteomics, LLC | Salt Lake City | UT | — | ◐ LIKELY ACTIVE |
| ICIntegrated Control Systems LLC | Holly Springs | NC | — | ◐ LIKELY ACTIVE |
| IDIntegrated Design Tools INC | Pasadena | CA | — | ◐ LIKELY ACTIVE |
| IEIntegrated Electronic Solutions, INC. | Hailey | ID | — | ◐ LIKELY ACTIVE |
| IPIntegrated Power Services Liberty OH Service Center | Liberty Township | OH | 1–19 | ◐ LIKELY ACTIVE |
| IPIntegrated Power Services Switchgear Solutions Service Center | Tucson | AZ | 20–99 | ◐ LIKELY ACTIVE |
| ITIntegrated Technology Lab, INC. | Bay Shore | NY | — | ◐ LIKELY ACTIVE |
| ICIntegrity Control Systems INC | Hoover | AL | — | ◐ LIKELY ACTIVE |