| Insteel Wire Products KYW KY | Manufacturing | 0 | — | F |
| Insteel Wire Products MOW MO | Manufacturing | 0 | — | D |
| Insteel Wire Products NCW NC | Manufacturing | 0 | — | F |
| Insteel Wire Products PAW PA | Manufacturing | 0 | — | F |
| Insteel Wire Products TNS TN | Manufacturing | 0 | — | C |
| Insteel Wire Products TXS TX | Manufacturing | 0 | — | A |
| Insteel Wire Products TXW TX | Manufacturing | 0 | — | C |
| Instellars Global Consulting Inc DE | Professional & Technical Services | 2 | $124,071 | — |
| Insticator, Inc. FL | Professional & Technical Services | 2 | $115,000 | — |
| Instiglio Inc NY | Other Services | 1 | $99,636 | — |
| Instil Bio Inc TX | Manufacturing | 0 | — | A |
| Instil Bio, Inc. CA | — | 0 | — | — |
| Instinct NE | Manufacturing | 0 | — | D |
| Instinet Holdings Incorporated NY | Finance & Insurance | 2 | $159,753 | — |
| Instinet, LLC (United States Equity Research & United States Equity Research Sales platform) NY | — | 0 | — | — |
| Institute for Advanced Study NJ | Professional & Technical Services | 3 | $80,353 | — |
| Institute for Applied Ecology OR | Other Services | 0 | — | C |
| Institute for Cancer Research PA | Professional & Technical Services | 4 | $66,815 | — |
| Institute for Education, Research, and Scholarships CA | Educational Services | 2 | $138,788 | — |
| Institute for Education, Research, and Scholarships (IFERS) CA | Educational Services | 5 | $106,642 | — |
| Institute for Environmental Assessment, Inc. MN | Professional & Technical Services | 0 | — | A |
| Institute for Human Resources & Services PA | Healthcare & Social Assistance | 0 | — | A |
| Institute for Intergovernmental Research, Inc. FL | — | 0 | — | — |
| Institute for Molecular Medicine CA | Professional & Technical Services | 1 | $138,000 | — |
| Institute for Multicultural Counseling & Education Services CA | Healthcare & Social Assistance | 0 | — | A |
| Institute for Musculoskeletal Advancement IL | Professional & Technical Services | 2 | $85,238 | — |
| Institute for Palestine Studies - USA DC | Information & Media | 1 | $54,766 | — |
| Institute for Systems Biology WA | Professional & Technical Services | 1 | $81,100 | — |
| Institute for the International Education of Students IL | — | 0 | — | — |
| Institute for the Redesign of Learning CA | Educational Services | 0 | — | D |
| Institute of Contemporary Art MA | Arts & Entertainment | 0 | — | A |
| Institute of Gas Technology IL | Professional & Technical Services | 7 | $119,525 | — |
| Institute of Information Technology, Inc. TX | Professional & Technical Services | 1 | $96,600 | — |
| Institute of International Finance DC | Other Services | 2 | $185,692 | — |
| Institute of Nuclear Medicine Inc. MD | Professional & Technical Services | 1 | $79,000 | — |
| Institute on Aging CA | Healthcare & Social Assistance | 0 | — | F |
| Institutes of Applied Human Dynamics, Inc. NY | — | 0 | — | — |
| Institutional Capital Network, Inc. NY | Finance & Insurance | 11 | $147,364 | — |
| Institutional Equipment Inc. IL | Manufacturing | 0 | — | A |
| Institutional Shareholder Services Inc. MD | Finance & Insurance | 4 | $124,925 | — |
| Instore Design Display MO | Manufacturing | 0 | — | A |
| Instron, a Division of Illinois Tool Works MA | Manufacturing | 1 | $90,040 | — |
| Instructional ABA Consultants IL | Healthcare & Social Assistance | 1 | $78,607 | — |
| Instrument and Valve Service Company LA | Other Services | 0 | — | A |
| Instrument and Valve Service Company TX | Other Services | 0 | — | A |
| Instrument and Valve Services Company GA | Other Services | 0 | — | A |
| Instrument Control Services CA | Other Services | 0 | — | D |
| Instrument Development Company, LLC WI | Manufacturing | 0 | — | B |
| Instrument LLC OR | Professional & Technical Services | 3 | $125,683 | — |
| INSTRUMENTAL SERVICES INC NY | Professional & Technical Services | 6 | $151,833 | — |
