| ATA Tools Inc. OH | Manufacturing | 0 | — | A |
| ATACO Steel Products WI | Manufacturing | 0 | — | F |
| Atai Constructions LLC GA | Construction | 1 | $55,266 | — |
| ATALIAN Global Services MA | Administrative & Waste Services | 0 | — | F |
| ATALIAN Global Services MO | Administrative & Waste Services | 0 | — | A |
| ATALIAN Global Services NJ | Administrative & Waste Services | 0 | — | C |
| ATALIAN Global Services OH | Administrative & Waste Services | 0 | — | A |
| Atallah Group US Inc. NY | Retail Trade | 1 | $207,000 | — |
| Atalys Asheboro LLC NC | Manufacturing | 0 | — | D |
| Atalys Tucson, LLC AZ | — | 0 | — | — |
| Atalys, LLC NY | Manufacturing | 0 | — | F |
| Atalys/RoMOld NY | Manufacturing | 0 | — | F |
| ATANE Engineers P.C. MA | Professional & Technical Services | 0 | — | A |
| ATANE Engineers, Architects & Land Surveyors, D.P.C. NY | Professional & Technical Services | 0 | — | A |
| ATANE Engineers, Architects & Land Surveyors, P.C. NJ | Professional & Technical Services | 0 | — | A |
| ATANE Engineers, Architects and Land Surveyors, D.P.C. NY | Professional & Technical Services | 0 | — | A |
| ATANE Engineers, Architects and Land Surveyors, P.C. PA | Professional & Technical Services | 0 | — | A |
| ATANE Engineers, P.C. CT | Professional & Technical Services | 0 | — | A |
| ATANE Engineers, P.C. RI | Professional & Technical Services | 0 | — | A |
| ATAP Inc. AL | Manufacturing | 0 | — | F |
| Atara Biotherapeutics CA | Manufacturing | 0 | — | F |
| Atara Biotherapeutics CO | Manufacturing | 0 | — | A |
| Ataraxis, Inc. ID | Administrative & Waste Services | 0 | — | A |
| ATARFIL USA INC. VA | Manufacturing | 0 | — | F |
| Atascadero Glass Inc CA | Construction | 0 | — | C |
| Atascadero Mutual Water Company CA | Utilities | 0 | — | F |
| Atascadero Pet Hospital and Emergency Center CA | Professional & Technical Services | 0 | — | F |
| Atavistik Bio, Inc. MA | Professional & Technical Services | 1 | $105,331 | — |
| ATB Growers CA | Agriculture & Forestry | 0 | — | A |
| ATC OK | Manufacturing | 0 | — | F |
| ATC TN | Manufacturing | 0 | — | F |
| ATC Drivetrain MI | Management of Companies | 0 | — | A |
| ATC Drivetrain TN | Manufacturing | 0 | — | F |
| ATC Drivetrain, LLC. OK | Manufacturing | 2 | $75,088 | F |
| ATC Power Systems Inc NH | Manufacturing | 0 | — | F |
| ATC Trailers IN | Manufacturing | 0 | — | A |
| ATC/Vancom of Arizona L.P. dba Veolia Tranport. AZ | — | 0 | — | — |
| ATCC MD | Transportation & Warehousing | 0 | — | B |
| Atcheson's Express CA | Transportation & Warehousing | 0 | — | A |
| Atchison-Holt Electric Cooperative MO | Utilities | 0 | — | F |
| ATCHLEY STEEL COMPANY, INC. AL | Manufacturing | 0 | — | F |
| ATCO ID | — | 0 | — | — |
| ATCO Industries LLC MI | Administrative & Waste Services | 0 | — | B |
| ATCO Manufacturing Company GA | Manufacturing | 0 | — | A |
| ATCO Products, Inc TX | Wholesale Trade | 0 | — | F |
| Atco Rubber Products GA | — | 0 | — | — |
| ATCO Structures TX | — | 0 | — | — |
| ATCO Structures & Logistics LA | — | 0 | — | — |
| ATCO Structures & Logistics (USA), Inc TX | Construction | 1 | $154,500 | — |
| ATCS, Inc OH | Construction | 0 | — | A |
