| Allegheny County PA | Public Administration | 1 | $96,886 | — |
| Allegheny County Airport Authority PA | Transportation & Warehousing | 1 | $170,000 | — |
| Allegheny Direct Logistics LLC PA | Transportation & Warehousing | 0 | — | A |
| Allegheny East Conference Corporation of Seventh-day Adventists PA | Other Services | 1 | $85,883 | — |
| Allegheny Excavating, Inc. PA | Construction | 0 | — | A |
| Allegheny General Hospital PA | — | 0 | — | — |
| ALLEGHENY HEALTH NETWORK NY | Healthcare & Social Assistance | 0 | — | C |
| ALLEGHENY HEALTH NETWORK PA | Healthcare & Social Assistance | 0 | — | D |
| Allegheny Health Network Home Medical Equipment, LLC PA | Real Estate | 0 | — | F |
| ALLEGHENY LUTHERAN SOCIAL MINISTRIES INC PA | Administrative & Waste Services | 0 | — | F |
| Allegheny Paper Shredders Corporation PA | Administrative & Waste Services | 0 | — | F |
| Allegheny Performance Plastics,LLC PA | Manufacturing | 0 | — | A |
| Allegheny Petroleum Products Company PA | Manufacturing | 0 | — | B |
| Allegheny Singer Research Institute PA | Healthcare & Social Assistance | 3 | $74,346 | — |
| Allegheny Structural Components PA | Manufacturing | 0 | — | F |
| Allegheny Supply PA | Wholesale Trade | 0 | — | D |
| Allegheny Surveys, Inc. WV | Professional & Technical Services | 0 | — | A |
| Allegheny Technologies Inc (ATI) PA | Manufacturing | 0 | — | A |
| Allegheny Technologies Inc. (ATI) IL | Manufacturing | 0 | — | A |
| Allegheny Technologies Inc. (ATI) MA | Manufacturing | 0 | — | A |
| Allegheny Technologies Inc. (ATI) OH | Manufacturing | 0 | — | A |
| Allegheny Technologies Inc. (ATI) PA | Manufacturing | 0 | — | C |
| Allegheny Technologies Incorporated IN | — | 0 | — | — |
| Allegheny Tecnologies Inc. (ATI) PA | Manufacturing | 0 | — | A |
| Allegheny Transportation Services PA | Transportation & Warehousing | 0 | — | A |
| Allegheny Valve & Coupling, Inc. PA | Manufacturing | 0 | — | F |
| Allegheny West Conference Corporation of Seventh-day Adventists OH | Other Services | 1 | $49,338 | — |
| Allegheny West Conference of Seventh-day Adventists OH | Other Services | 1 | $49,824 | — |
| Allegheny Wood Products, Inc. WV | Manufacturing | 0 | — | F |
| Allegheny Wood Products, Inc. Beckley Mill WV | — | 0 | — | — |
| Allegheny Wood Products, Inc. Marble Sawmill PA | — | 0 | — | — |
| Allegheny Wood Products, Inc. Norton Mill WV | — | 0 | — | — |
| Allegiance Fire Protection , LLC TX | Construction | 0 | — | A |
| Allegiance Health Management MS | Healthcare & Social Assistance | 0 | — | F |
| Allegiance health Management, Inc LA | Healthcare & Social Assistance | 0 | — | A |
| Allegiance LLC MS | Transportation & Warehousing | 0 | — | B |
| Allegiance Logistics LLC OR | Administrative & Waste Services | 0 | — | D |
| Allegiance Mobile Health TX | Healthcare & Social Assistance | 0 | — | A |
| Allegiance Roof Systems FL | Construction | 0 | — | A |
| ALLEGIANT AIR AZ | Transportation & Warehousing | 0 | — | D |
| ALLEGIANT AIR CA | Transportation & Warehousing | 0 | — | C |
| ALLEGIANT AIR FL | Transportation & Warehousing | 0 | — | F |
| ALLEGIANT AIR GA | Transportation & Warehousing | 0 | — | F |
| ALLEGIANT AIR IA | Transportation & Warehousing | 0 | — | F |
| ALLEGIANT AIR ID | Transportation & Warehousing | 0 | — | F |
| ALLEGIANT AIR IL | Transportation & Warehousing | 0 | — | D |
| Allegiant Air IN | Transportation & Warehousing | 0 | — | F |
| ALLEGIANT AIR KY | Transportation & Warehousing | 0 | — | C |
| ALLEGIANT AIR MI | Transportation & Warehousing | 0 | — | F |
| ALLEGIANT AIR NC | Transportation & Warehousing | 0 | — | D |
