| Industrial Pump & Machine AL | Other Services | 0 | — | A |
| Industrial Quality Services, Inc. TX | Administrative & Waste Services | 0 | — | B |
| Industrial Rail LA | Transportation & Warehousing | 0 | — | A |
| Industrial Rail TX | Transportation & Warehousing | 0 | — | A |
| Industrial Refrigeration Service, Inc. MD | Construction | 0 | — | C |
| Industrial Reliability and Repair OH | Other Services | 0 | — | A |
| Industrial Repair Service WA | Manufacturing | 0 | — | F |
| Industrial Resources Inc. WA | Construction | 0 | — | A |
| Industrial Riggers, Inc. CT | Construction | 0 | — | F |
| Industrial Rivet & Fastener Co. NJ | Wholesale Trade | 0 | — | A |
| Industrial roofing and Construction LA | Construction | 0 | — | A |
| Industrial Roofing Company, LLC ME | Construction | 0 | — | D |
| Industrial Rubber Inc. OK | Manufacturing | 0 | — | A |
| Industrial Sales & service Corp NY | Other Services | 0 | — | A |
| Industrial Sales and Manufacturing Inc. PA | Manufacturing | 0 | — | F |
| Industrial Scaffolding L.L.C. DBA Industrial Specialty Crafts L.L.C. TX | Construction | 0 | — | A |
| Industrial Scientific Corporation PA | Manufacturing | 1 | $180,107 | B |
| Industrial Service & Installation, Inc. PA | Manufacturing | 0 | — | F |
| Industrial Service Solutions, LLC CA | Other Services | 0 | — | A |
| Industrial Service Solutions, LLC CO | Other Services | 0 | — | A |
| INDUSTRIAL SERVICE SOLUTIONS, LLC TX | Other Services | 1 | $151,000 | A |
| Industrial Services Enterprises NJ | Construction | 0 | — | D |
| Industrial Sewing and Innovation Center (ISAIC) MI | Manufacturing | 0 | — | F |
| Industrial Skilled Trades, Inc IL | Administrative & Waste Services | 0 | — | A |
| Industrial Source/National Fire Fighter Corp. OR | Wholesale Trade | 0 | — | D |
| Industrial Specialists, LLC LA | Construction | 0 | — | A |
| Industrial Specialists, LLC TX | Construction | 0 | — | A |
| Industrial Specialty Company Inc. AL | Manufacturing | 0 | — | D |
| Industrial Specialty Services USA LLC DE | Other Services | 0 | — | A |
| Industrial Specialty Services USA LLC LA | Other Services | 0 | — | A |
| Industrial Specialty Services USA LLC MS | Other Services | 0 | — | A |
| Industrial Specialty Services USA LLC TX | Other Services | 0 | — | A |
| Industrial Spring Corporation MO | Manufacturing | 0 | — | F |
| Industrial Steel & Boiler Services, Inc. MA | Other Services | 0 | — | F |
| Industrial Steel & Machinery, Inc GA | Construction | 0 | — | A |
| INDUSTRIAL STEEL & SUPPLY CO INC OR | Manufacturing | 0 | — | F |
| Industrial Steel & Wire CT | Wholesale Trade | 0 | — | A |
| Industrial Steel & Wire IL | Wholesale Trade | 0 | — | A |
| Industrial Steel & Wire NC | Wholesale Trade | 0 | — | A |
| Industrial Steel & Wire OH | Wholesale Trade | 0 | — | A |
| Industrial Steel LLC FL | Manufacturing | 0 | — | F |
| Industrial Strength Corporation CA | Manufacturing | 0 | — | C |
| Industrial Stripping Services LLC MI | Manufacturing | 0 | — | F |
| Industrial Summit Technology Corporation NJ | Manufacturing | 0 | — | A |
| Industrial Supply & Service LLC LA | Manufacturing | 0 | — | A |
| Industrial Supply Company IN | Wholesale Trade | 0 | — | A |
| Industrial Support INC NY | Manufacturing | 0 | — | A |
| Industrial Support Services, Inc FL | Manufacturing | 0 | — | A |
| INDUSTRIAL SYSTEMS OF CAPE GIRARDEAU, INC. MO | Construction | 0 | — | A |
| Industrial Tech Services Inc KY | Professional & Technical Services | 0 | — | A |
