| IRVING WOODLANDS LLC ME | Agriculture & Forestry | 0 | — | B |
| Irvinville Enterprise LLC OR | Agriculture & Forestry | 0 | — | A |
| Irwin & Leighton PA | Construction | 0 | — | A |
| Irwin A. and Robert D. Goodman Community Center WI | Healthcare & Social Assistance | 0 | — | F |
| IRWIN ELECTRIC MEMBERSHIP CORPORATION GA | Utilities | 0 | — | D |
| Irwin Industries, Inc. (AECOM) CA | — | 0 | — | — |
| Irwin Industries, Inc. (Ashland LLC) CA | — | 0 | — | — |
| Irwin Industries, Inc. (Carpinteria Pier Marine CA | — | 0 | — | — |
| Irwin Industries, Inc. (Lompoc Oil Field) CA | — | 0 | — | — |
| Irwin Industries, Inc. (PBF Torrance Refinery) CA | — | 0 | — | — |
| Irwin Industries, Inc. (Phillips 66 Coalinga CA | — | 0 | — | — |
| Irwin Industries, Inc. (Shore Terminals LLC) CA | — | 0 | — | — |
| Irwin Industries, Inc.(3M Moreno Valley) CA | — | 0 | — | — |
| Irwin R. Rose & Company IN | Real Estate | 0 | — | A |
| Irwin Seating Company IL | Manufacturing | 0 | — | F |
| Irwin Seating Company MI | Manufacturing | 0 | — | D |
| Irwin Steel LLC TX | Manufacturing | 0 | — | F |
| Irwin Tools IN | — | 0 | — | — |
| Irwin, Inc. CA | Professional & Technical Services | 1 | $206,315 | — |
| IS Chrystie Management LLC dba Public Hotel NY | — | 0 | — | — |
| ISA Life Sciences Inc CO | Other Services | 1 | $82,000 | — |
| Isaac Blair & Company, Inc. MA | Construction | 0 | — | F |
| ISAAC GROUP LLC NY | Administrative & Waste Services | 1 | $80,080 | — |
| Isaac Heating and air conditioning NY | Construction | 0 | — | F |
| ISAAC HOLDINGS, INC. KY | Transportation & Warehousing | 0 | — | D |
| ISAAC MUNOZ CA | Agriculture & Forestry | 0 | — | A |
| Isaac School District No. 5 AZ | Educational Services | 8 | $54,855 | — |
| Isaacs Company Corporation OH | Wholesale Trade | 0 | — | A |
| Isaacson Structural Steel, Inc. NH | — | 0 | — | — |
| Isabel Bloom Inc. IA | Manufacturing | 0 | — | A |
| Isabel Chiu & Co., LLP CA | Professional & Technical Services | 1 | $104,832 | — |
| ISABELLA CITIZENS FOR HEALTH INC MI | Healthcare & Social Assistance | 2 | $207,500 | — |
| Isabella County MI | Public Administration | 0 | — | F |
| Isabella Foods TX | Manufacturing | 0 | — | F |
| ISABELLA STEWART GARDNER MUSEUM INC MA | Arts & Entertainment | 0 | — | C |
| Isabella Visiting Care, Inc. NY | — | 0 | — | — |
| Isabelles Kitchen Inc PA | Manufacturing | 0 | — | F |
| Isagenix UT | — | 0 | — | — |
| Isaiah House KY | Healthcare & Social Assistance | 0 | — | C |
| iSAM FUNDS (USA) LLC FL | Finance & Insurance | 1 | $174,100 | — |
| ISAM Hybrid Information Systems LLC IL | Professional & Technical Services | 3 | $94,000 | — |
| ISANI CONSULTANTS, L.P. TX | Professional & Technical Services | 1 | $126,000 | — |
| Isanti County MN | Public Administration | 0 | — | D |
| Isbell Construction Ltd TX | Construction | 0 | — | A |
| ISC Constructors, LLC LA | Construction | 0 | — | A |
| ISC Contracting MO | Construction | 0 | — | F |
| ISC Holdings, LLC GA | Finance & Insurance | 1 | $82,493 | — |
| ISC Inc dba Isernio Sausage Company WA | Manufacturing | 0 | — | F |
| ISC Manufacturing LLC TX | Manufacturing | 0 | — | A |
| ISC Structures Inc NJ | Construction | 0 | — | A |
