| Six Flags WWBay LLC OK | Arts & Entertainment | 0 | — | A |
| Six on Broadway, L.P. (SIX at the Brooks Atkinson Theatre, NYC) NY | — | 0 | — | — |
| Six Sigma Academy International, LLC NY | Professional & Technical Services | 1 | $243,875 | — |
| Six Sigma Winery, LLC CA | Manufacturing | 0 | — | A |
| Six Star Management, LLC UT | Construction | 0 | — | A |
| Sixarp LLC MI | Administrative & Waste Services | 0 | — | C |
| Sixarp LLC NJ | Administrative & Waste Services | 0 | — | D |
| Sixarp LLC OH | Administrative & Waste Services | 0 | — | A |
| SixB Labels TX | Manufacturing | 0 | — | A |
| SixDOF Tesing and Analysis Inc. OH | Professional & Technical Services | 1 | $72,800 | — |
| Sixel & Schwinn, Inc. WI | Construction | 0 | — | A |
| Sixense Inc WA | Construction | 1 | $141,102 | — |
| Sixfold AI, Inc. NY | Information & Media | 1 | $160,000 | — |
| Sixt Rent A Car GA | Real Estate | 0 | — | F |
| Sixt Rent A Car LLC AZ | Real Estate | 0 | — | A |
| Sixt Rent A Car LLC CA | Real Estate | 0 | — | F |
| Sixt Rent A Car LLC FL | Real Estate | 0 | — | A |
| Sixt Rent A Car LLC HI | Real Estate | 0 | — | A |
| Sixt Rent A Car LLC IL | Real Estate | 0 | — | A |
| Sixt Rent A Car LLC NV | Real Estate | 0 | — | A |
| Sixt Rent A Car LLC NY | Real Estate | 0 | — | A |
| Sixt Rent A Car LLC PA | Real Estate | 0 | — | A |
| Sixt Rent A Car LLC TX | Real Estate | 0 | — | A |
| Sixt Rent A Car, LLC CO | Real Estate | 0 | — | A |
| Sixt Rent A Car, LLC MA | Real Estate | 0 | — | A |
| Sixt Rent A Car, LLC MN | Real Estate | 0 | — | A |
| Sixt Rent A Car, LLC NJ | Real Estate | 0 | — | F |
| Sixt Rent A Car, LLC NM | Real Estate | 0 | — | A |
| Sixt Rent A Car, LLC OR | Real Estate | 0 | — | A |
| Sixt Rent A Car, LLC UT | Real Estate | 0 | — | A |
| Sixt Rent A Car, LLC VA | Real Estate | 0 | — | A |
| Sixt Rent A Car, LLC WA | Real Estate | 0 | — | A |
| Sixt Rent A Cr LLC FL | Real Estate | 0 | — | A |
| Sixth Avenue Electronics NJ | — | 0 | — | — |
| Sixth Jdcl Dist Dept of Crctnl Svc IA | Public Administration | 0 | — | A |
| Sixth Street Opportunities Partners, LP TX | Finance & Insurance | 5 | $179,520 | — |
| Sixty Hospitality, LLC dba Avra Madison Estiatorio NY | — | 0 | — | — |
| Sixty Soho Hotel NY | Accommodation & Food Services | 0 | — | A |
| Siyatech Consulting Inc TX | Professional & Technical Services | 1 | $99,965 | — |
| Sizelove Construction Co Inc TX | Construction | 0 | — | A |
| Sizemore Inc AL | Administrative & Waste Services | 0 | — | A |
| Sizemore Inc DE | Administrative & Waste Services | 0 | — | B |
| Sizemore Inc FL | Administrative & Waste Services | 0 | — | A |
| Sizemore Inc GA | Administrative & Waste Services | 0 | — | A |
| Sizemore Inc KY | Administrative & Waste Services | 0 | — | A |
| Sizemore Inc LA | Administrative & Waste Services | 0 | — | A |
| Sizemore Inc MS | Administrative & Waste Services | 0 | — | A |
| Sizemore Inc NC | Administrative & Waste Services | 0 | — | C |
| Sizemore Inc OH | Administrative & Waste Services | 0 | — | A |
| Sizemore Inc SC | Administrative & Waste Services | 0 | — | F |
