| Iron Tiger Logistics PA | — | 0 | — | — |
| Iron Valley Golf Course PA | Arts & Entertainment | 0 | — | C |
| Iron Woman Construction & Environmental Services LLC CO | Construction | 0 | — | A |
| Iron-Horse Cranes Inc IL | Manufacturing | 0 | — | A |
| Ironclad Energy, LLC TX | Mining & Extraction | 0 | — | A |
| Ironclad Pressure Control LLC TX | Mining & Extraction | 0 | — | A |
| Ironclad Services LLC MA | Construction | 0 | — | A |
| Ironclad, Inc. CA | Professional & Technical Services | 14 | $182,557 | — |
| IronCraft TN | Manufacturing | 0 | — | F |
| Irondale Industrial Contractors, Inc. AL | Construction | 0 | — | D |
| IronEarth Construction Inc. NC | Construction | 0 | — | A |
| Irongate Azrep BW LLC dba Trump International Hotel Waikiki HI | — | 0 | — | — |
| IronHead Construction Company, LLC NC | Construction | 0 | — | F |
| Ironhorse Funding, LLC. TX | — | 0 | — | — |
| IronHustler Excavating, Inc. IL | Construction | 0 | — | A |
| Ironman 4x4 USA OR | Wholesale Trade | 0 | — | A |
| IronRidge, Inc. CA | Manufacturing | 1 | $98,155 | — |
| IRONROCK CAPITAL INC OH | Manufacturing | 0 | — | D |
| Ironrock Commercial Construction FL | Construction | 0 | — | F |
| IRONSDN, CORP. CA | Information & Media | 1 | $110,000 | — |
| IronShore Contracting MD | Construction | 0 | — | D |
| Ironside Inc CA | — | 0 | — | — |
| Ironside Inc. dba Ironside Fish & Oyster CA | — | 0 | — | — |
| Ironside Industrial Services, LLC TX | Mining & Extraction | 0 | — | A |
| Ironside Logistics LLC OH | Transportation & Warehousing | 0 | — | B |
| Ironsmith Fire, LLC TN | Construction | 0 | — | F |
| IronTiger Logistics TX | — | 0 | — | — |
| IronTiger Logistics, Inc. OH | Transportation & Warehousing | 0 | — | F |
| IronTiger Logistics, Inc. PA | Transportation & Warehousing | 0 | — | F |
| IronTiger Logistics, Inc. VA | Transportation & Warehousing | 0 | — | D |
| Ironton OH 0313 LLC OH | Accommodation & Food Services | 0 | — | A |
| Ironton OH 0817 LLC OH | Arts & Entertainment | 0 | — | C |
| IronUnits LLC. OH | Manufacturing | 0 | — | F |
| Ironville Rail & Transfer, Toledo Industrial Railroad, Midwest Terminals of Toledo OH | Transportation & Warehousing | 0 | — | C |
| Ironwood Assisted Living AZ | — | 0 | — | — |
| Ironwood Assisted Living, LLC OH | Healthcare & Social Assistance | 0 | — | F |
| Ironwood Capital Management CA | Finance & Insurance | 1 | $125,000 | — |
| Ironwood Commercial Builders, Inc. CA | Construction | 0 | — | B |
| Ironwood Heavy Highway LLC NY | Construction | 0 | — | D |
| IRONWOOD HOMES, INC. IL | Construction | 0 | — | A |
| Ironwood Industries IL | Manufacturing | 0 | — | A |
| Ironwood Management CA | — | 0 | — | — |
| Ironwood Manufacturing WA | Manufacturing | 0 | — | F |
| Ironwood Plastics, Inc WI | Manufacturing | 0 | — | A |
| Ironwood State Prison CA | Public Administration | 0 | — | F |
| Irony, LLC dba Mulberrys Garment Care MN MN | Other Services | 0 | — | A |
| Iroquois Assembly Systems, Inc MI | Manufacturing | 0 | — | F |
| Iroquois Bar Corp NY | Construction | 0 | — | B |
| Iroquois Bio-Energy Company IN | Manufacturing | 0 | — | C |
| Iroquois Hotel LLC NY | — | 0 | — | — |
