| Atrium Hospitality - St. Charles Embassy Suites MO | - | 0 | - | - |
| Atrium Hospitality dba Embassy Suites Franklin TN | - | 0 | - | - |
| Atrium Hospitality dba Embassy Suites Murfreesboro TN | - | 0 | - | - |
| Atrium Hospitality dba Long Beach Hilton CA | - | 0 | - | - |
| Atrium Hospitality dba Monterey Embassy Suites CA | - | 0 | - | - |
| Atrium Hospitality dba Sacramento Holiday Inn CA | - | 0 | - | - |
| Atrium Hospitality dba Stamford Hilton* CT | - | 0 | - | - |
| Atrium Hospitality Embassy Suites Hampton VA | - | 0 | - | - |
| Atrium Hospitality LP/Denver Crowne Plaza CO | - | 0 | - | - |
| Atrium Hospitality- Concord Embassy Suites COVID19 NC | - | 0 | - | - |
| Atrium Hospitality-Holiday Inn Bowling Green KY | - | 0 | - | - |
| Atrium Hospitality: Chateau on the Lake Resort Spa & Convention Center MO | - | 0 | - | - |
| Atrium Living Centers MI | Healthcare & Social Assistance | 0 | - | F |
| Atrium Living Centers OH | Healthcare & Social Assistance | 0 | - | F |
| Atrium Living Centers WI | Healthcare & Social Assistance | 0 | - | F |
| Atrium LTS CA | - | 0 | - | - |
| Atrium Medical Center / Premier Health OH | Healthcare & Social Assistance | 0 | - | D |
| Atrium Medical Corporation NH | Manufacturing | 1 | $99,440 | - |
| Atrium Patio Doors by Woodgrain Millwork TX | - | 0 | - | - |
| Atrium Windows & Door NC | Manufacturing | 0 | - | F |
| Atrium Windows and Doors TX | Manufacturing | 0 | - | C |
| Atrius Health MA | - | 0 | - | - |
| Atrix Networx LLC WY | Professional & Technical Services | 1 | $106,127 | - |
| Atrix Technologies LLC NM | Professional & Technical Services | 2 | $106,004 | - |
| Atrixsoft LLC WY | Professional & Technical Services | 111 | $106,197 | - |
| Atrutec LLC NJ | Professional & Technical Services | 2 | $101,100 | - |
| Atruz Solutions LLC CA | Professional & Technical Services | 1 | $100,000 | - |
| ATS Drilling, Inc. TX | Construction | 0 | - | F |
| ATS Logistics, Inc SC | Transportation & Warehousing | 0 | - | D |
| ATS Ohio, Inc. OH | Manufacturing | 1 | $96,000 | - |
| ATS Operating LLC GA | Retail Trade | 0 | - | C |
| ATS Operating LLC MS | Retail Trade | 0 | - | A |
| ATS Operating, LLC AL | Retail Trade | 1 | $246,376 | D |
| ATS Test and Assembly, Inc. PA | Manufacturing | 0 | - | D |
| ATS Trans LLC WA | Transportation & Warehousing | 0 | - | F |
| Atsalis Brothers Painting MI | Construction | 0 | - | F |
| ATSCO Remanufacturing Inc. AZ | - | 0 | - | - |
| Attainment Holdco LLC CA | Educational Services | 6 | $205,986 | - |
| AttainX, Inc. VA | Professional & Technical Services | 2 | $100,079 | - |
| Attala Steel Industries MS | Manufacturing | 0 | - | F |
| Attala Steel Industries TX | Manufacturing | 0 | - | F |
| Attala Steel, Inc. MS | - | 0 | - | - |
| Attala Steele Industries (Hilsboro Plant) TX | - | 0 | - | - |
| Attaway Hauling GA | Transportation & Warehousing | 0 | - | F |
| Attawheed Foundation PA | Other Services | 1 | $70,000 | - |
| Attempt IT Solutions Inc MI | Professional & Technical Services | 1 | $72,000 | - |
| Attentive Mobile, Inc. NY | Professional & Technical Services | 13 | $235,466 | - |
| Attic Angel Community WI | Healthcare & Social Assistance | 0 | - | F |
| Atticman Heating & Air Conditioning, Insulation Inc. CA | Construction | 0 | - | F |
| Atticus LLC (To Kill a Mockingbird at the Shubert Theatre) NY | - | 0 | - | - |