| Instrumental, Inc. CA | Professional & Technical Services | 2 | $163,977 | — |
| Instrumentation & Control Systems Engineering, Inc VA | Construction | 0 | — | F |
| Instrumentation Industries, Inc. PA | Manufacturing | 0 | — | A |
| Instrumentation Laboratory (Werfen) NY | Manufacturing | 0 | — | D |
| Instrumentation Laboratory Company MA | Wholesale Trade | 5 | $128,734 | A |
| Insul Bead Corporation AR | Manufacturing | 0 | — | A |
| Insul-Bead Corporation AR | Manufacturing | 0 | — | A |
| Insulated Panel Company IL | Construction | 0 | — | A |
| Insulated Products Corporation CA | Manufacturing | 0 | — | F |
| Insulating Services, Inc. NC | Construction | 0 | — | A |
| Insulation and Supply Company WI | Wholesale Trade | 0 | — | A |
| Insulation Contracting & Supply, Inc NV | Construction | 0 | — | A |
| Insulation Contractors of Washington, LLC WA | Construction | 0 | — | F |
| Insulation Distributors, Inc CA | Wholesale Trade | 0 | — | C |
| Insulation Distributors, Inc MA | Wholesale Trade | 0 | — | F |
| Insulation Distributors, Inc TX | Wholesale Trade | 0 | — | F |
| Insulation From Hale UT | Construction | 0 | — | A |
| Insulation Industries Inc WI | Construction | 0 | — | A |
| Insulation Northwest, LLC WA | Construction | 0 | — | F |
| Insulation Products IL | Wholesale Trade | 0 | — | A |
| Insulation Services, Inc MI | Administrative & Waste Services | 0 | — | C |
| Insulation Solutions of Tennessee TN | Construction | 0 | — | F |
| Insulation Specialties Contracting Corp PR | Construction | 0 | — | A |
| Insulation Specialties, Inc. MD | Construction | 0 | — | A |
| Insulation Specialties, Inc. VA | Construction | 0 | — | A |
| Insulation Technologies LA | Administrative & Waste Services | 0 | — | B |
| Insulation Technology Corp CO | Manufacturing | 0 | — | F |
| Insulations, LLC. LA | Construction | 0 | — | A |
| Insulations, LLC. TX | Construction | 0 | — | A |
| Insulations, LLC. @ Calumet Shreveport LA | Construction | 0 | — | A |
| Insulations, LLC. @ Formosa Plastics LA | Construction | 0 | — | A |
| Insulations, LLC. @ Kinder Morgan LA | Construction | 0 | — | A |
| Insulations, LLC. @ Rubicon LLC. LA | Construction | 0 | — | A |
| Insulations, LLC. @ Shintech LA | Construction | 0 | — | D |
| Insulations, LLC. @ Tokai Carbon LA | Construction | 0 | — | A |
| Insulations, LLC. @ Westlake Chemical LA | Construction | 0 | — | A |
| Insulectro AZ | Wholesale Trade | 0 | — | A |
| Insulectro CA | Wholesale Trade | 0 | — | A |
| Insulectro CO | Wholesale Trade | 0 | — | A |
| Insulectro IL | Wholesale Trade | 0 | — | A |
| Insulectro MN | Wholesale Trade | 0 | — | A |
| Insulectro NH | Wholesale Trade | 0 | — | A |
| Insulectro OR | Wholesale Trade | 0 | — | A |
| Insulet Corporation CA | Manufacturing | 0 | — | F |
| Insulet Corporation MA | Manufacturing | 15 | $150,305 | D |
| Insulfab Plastics SC | Manufacturing | 0 | — | A |
| Insulfab Plastics, Inc. NH | Manufacturing | 0 | — | A |
| Insulsafe Textiles, Inc. ME | Manufacturing | 0 | — | C |
| INSULTAB, INC. MA | Manufacturing | 0 | — | A |
| InsulVail Insulation, LLC CO | Construction | 0 | — | F |
