| 4-County Electric Power Association MS | Utilities | 0 | — | D |
| 4-K Housing, Inc. TX | Healthcare & Social Assistance | 0 | — | F |
| 4-M Precision Industries, Inc. NY | Manufacturing | 0 | — | A |
| 4-Serv Solutions Inc. MI | Professional & Technical Services | 3 | $89,317 | — |
| 4-STAR Hose & Supply, Inc. TX | Wholesale Trade | 0 | — | A |
| 4-Star Trailers Inc. OK | Manufacturing | 0 | — | F |
| 4/15/2024 MA | Retail Trade | 0 | — | A |
| 40 - AMERICAN HOMECARE HEALTH CA | Healthcare & Social Assistance | 0 | — | A |
| 400 East Corp. NY | Construction | 0 | — | A |
| 4005 BR SNF, LLC dba Mid City Community Nursing and Rehab LA | Healthcare & Social Assistance | 0 | — | D |
| 401 FOOD LLC, dba Merchants Restaurant TN | — | 0 | — | — |
| 401 Manufacturing Inc MN | Manufacturing | 0 | — | A |
| 401 North Wabash Avenue Hotel Condominium Association IL | Accommodation & Food Services | 0 | — | F |
| 401 North Wabash Venture LLC IL | Accommodation & Food Services | 0 | — | F |
| 402 East Broughton Street, Inc GA | Retail Trade | 0 | — | A |
| 404 Roof Roof, Inc GA | Construction | 0 | — | A |
| 406 ASSET LIVING - ARKANSAS AR | Real Estate | 0 | — | F |
| 40th District Court MI | Public Administration | 0 | — | A |
| 41 CASE AND MILLWORK, INC. SC | Manufacturing | 0 | — | F |
| 41 Cross St Hospitality LLC NY | Accommodation & Food Services | 0 | — | A |
| 41 MANAGEMENT IL | Healthcare & Social Assistance | 0 | — | A |
| 41 North Contractors, LLC IL | Construction | 0 | — | A |
| 41 Oak Street CT | Healthcare & Social Assistance | 0 | — | A |
| 411 Industries, LLC TN | Administrative & Waste Services | 0 | — | A |
| 413 Ind School District MN | Educational Services | 0 | — | A |
| 416 Johnson Properties PA | Manufacturing | 0 | — | F |
| 41st Midtown LLC NY | Accommodation & Food Services | 0 | — | F |
| 41st Parameter, Inc. CA | Information & Media | 1 | $135,130 | — |
| 42 North Dental Care, LLC MA | Healthcare & Social Assistance | 9 | $123,970 | — |
| 42 North Dental Care, PLLC MA | Healthcare & Social Assistance | 6 | $135,110 | — |
| 423 MAIN STREET GROUP LP TX | Accommodation & Food Services | 0 | — | A |
| 423830 ME | Wholesale Trade | 0 | — | F |
| 424490 CA | Wholesale Trade | 0 | — | F |
| 424490 WA | Wholesale Trade | 0 | — | F |
| 42dot Inc. CA | Professional & Technical Services | 1 | $159,000 | — |
| 42nd Apple, LLC NY | — | 0 | — | — |
| 43-1717711 MO | Manufacturing | 0 | — | F |
| 431 E Division St WI | Manufacturing | 0 | — | F |
| 4312 ARGENTINA LLC MN | Accommodation & Food Services | 0 | — | D |
| 431317073 NV | Real Estate | 0 | — | A |
| 4330 Unitek Learning Education Group Corp. CA | — | 0 | — | — |
| 435 West 31st Street B, LLC NY | Accommodation & Food Services | 0 | — | F |
| 43rd St., Inc. PA | Manufacturing | 0 | — | A |
| 44 Ball Street Operating Company, LLC NY | Healthcare & Social Assistance | 0 | — | A |
| 44 Design LLC NY | Professional & Technical Services | 1 | $90,000 | — |
| 44 Restaurant LLC dba The Lambs Club NY | — | 0 | — | — |
| 440 Jericho Turnpike Auto Sales, LLC dba Ford & Lincoln of Smithtown NY | — | 0 | — | — |
| 440 Saratoga Partners, LP CA | Accommodation & Food Services | 0 | — | F |
| 442 Amsterdam Ave. Rest. Corp. dba The Gin Mill NY | — | 0 | — | — |
| 442110 NC | Retail Trade | 0 | — | D |