| HSHighway Safety Corp. | Glastonbury | CT | 20–99 | ◐ LIKELY ACTIVE |
| HSHighway Safety LLC | Marion | OH | 20–99 | ◐ LIKELY ACTIVE |
| HBHi-tech Bed Systems, Corporation | Wheatland | WY | — | ◐ LIKELY ACTIVE |
| HLHkr, LLC | Catoosa | OK | 20–99 | ◐ LIKELY ACTIVE |
| HIHoffman Industries, LLC | Anoka | MN | 500+ | ◐ LIKELY ACTIVE |
| HFHormann Flexon LLC - Burgettstown | Burgettstown | PA | 20–99 | ◐ LIKELY ACTIVE |
| HFHormann Flexon LLC - Imperial | Imperial | PA | 1–19 | ◐ LIKELY ACTIVE |
| HLHormann LLC - Montgomery | Montgomery | IL | 20–99 | ◐ LIKELY ACTIVE |
| HLHormann LLC - Sparta, TN | Sparta | TN | 100–499 | ◐ LIKELY ACTIVE |
| HNHormann Northwest Door LLC - Boise | Meridian | ID | 1–19 | ◐ LIKELY ACTIVE |
| HNHormann Northwest Door LLC - Dallas | Dallas | TX | 1–19 | ◐ LIKELY ACTIVE |
| HNHormann Northwest Door LLC - Denver | Aurora | CO | 1–19 | ◐ LIKELY ACTIVE |
| HNHormann Northwest Door LLC - Marysville | Marysville | WA | 1–19 | ◐ LIKELY ACTIVE |
| HNHormann Northwest Door LLC - Phoenix | Phoenix | AZ | 1–19 | ◐ LIKELY ACTIVE |
| HNHormann Northwest Door LLC - Portland | Milwaukie | OR | 1–19 | ◐ LIKELY ACTIVE |
| HNHormann Northwest Door LLC - Puyallup | Puyallup | WA | 100–499 | ◐ LIKELY ACTIVE |
| HNHormann Northwest Door LLC - Salt Lake City | Salt Lake City | UT | 1–19 | ◐ LIKELY ACTIVE |
| HNHormann Northwest Door LLC - San Jose | San Jose | CA | 1–19 | ◐ LIKELY ACTIVE |
| HNHormann Northwest Door LLC - Spokane | Liberty Lake | WA | 1–19 | ◐ LIKELY ACTIVE |
| HUHormann USA LLC - Allentown | Allentown | PA | 1–19 | ◐ LIKELY ACTIVE |
| HUHormann USA LLC - Chicago | Montgomery | IL | 1–19 | ◐ LIKELY ACTIVE |
| HUHormann USA LLC - Cincinnati | West Chester | OH | 1–19 | ◐ LIKELY ACTIVE |
| HUHormann USA LLC - Grand Rapids | Grand Rapids | MI | 1–19 | ◐ LIKELY ACTIVE |
| HUHormann USA LLC - Greensboro | High Point | NC | 1–19 | ◐ LIKELY ACTIVE |
| HUHormann USA LLC - Long Island | Commack | NY | 1–19 | ◐ LIKELY ACTIVE |
| HUHormann USA LLC - Minneapolis | Hopkins | MN | 1–19 | ◐ LIKELY ACTIVE |
| HUHormann USA LLC - Nashville | Murfresboro | TN | 1–19 | ◐ LIKELY ACTIVE |
| HCHOUMP Contech Engineered Solutions LLC | Schulenburg | TX | 20–99 | ◐ LIKELY ACTIVE |
| HMHUI Manufacturing | Kiel | WI | 100–499 | ◐ LIKELY ACTIVE |
| HMHuntsville MFG | Huntsville | AL | 100–499 | ◐ LIKELY ACTIVE |
| HWHuron Welding LLC | Huron | SD | — | ◐ LIKELY ACTIVE |
| HPHye Precision Fab INC. | Anaheim | CA | — | ◐ LIKELY ACTIVE |
| IPIcon Protection 62B Green Mountain Rd. | Hazle Twp. | PA | 20–99 | ◐ LIKELY ACTIVE |
| ISIdaho Steel Products - Millwright Division | Idaho Falls | ID | 20–99 | ◐ LIKELY ACTIVE |
| IMIKO Metals USA, Inc. | Ennis | TX | 20–99 | ◐ LIKELY ACTIVE |
| IMIMETCO / Merchant Evans | Burlington | NJ | 20–99 | ◐ LIKELY ACTIVE |
| IEIndustrial Engineering Manufacturing Co, INC | Foxboro | MA | — | ◐ 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 |
| IFInnovation First Manufacturing, Inc. | Greenville | TX | 20–99 | ◐ LIKELY ACTIVE |
| ICInsingerMachine Company | Philadelphia | PA | 20–99 | ◐ LIKELY ACTIVE |
| IEInstitutional Equipment INC | Bolingbrook | IL | — | ◐ LIKELY ACTIVE |
| IFIntegral Fabrication & Engineering, LLC | Orlando | FL | — | ◐ LIKELY ACTIVE |
| ISIntellifab Solutions LLC | Atlanta | GA | — | ◐ LIKELY ACTIVE |
International Computer Appliances Corporation | Minneapolis | MN | 100–499 | ◐ LIKELY ACTIVE |
| IDir Distributers D. B. A. The Metal Shop | Dunnellon | FL | 20–99 | ◐ LIKELY ACTIVE |
| IFITW FEG Troy Plant | Troy | OH | 100–499 | ◐ LIKELY ACTIVE |
| INIVI North, Inc. | Greenville | WI | 100–499 | ◐ LIKELY ACTIVE |
| INIVI North, Inc. - OK Branch | Muskogee | OK | 1–19 | ◐ LIKELY ACTIVE |
| ISIVI South, Inc. | Inman | SC | 20–99 | ◐ LIKELY ACTIVE |