| AMP Robotics GA | Wholesale Trade | 0 | — | F |
| AMP Robotics OH | Wholesale Trade | 0 | — | F |
| AMP Solutions LLC NC | Professional & Technical Services | 1 | $88,629 | — |
| AMP Solutions LLC NJ | Professional & Technical Services | 9 | $93,457 | — |
| Amp's Future Inc. MN | Construction | 0 | — | D |
| AMP-Cherokee Environmental Solutions NC | Real Estate | 0 | — | F |
| AMPAC Fine Chemicals VA | Manufacturing | 0 | — | A |
| AMPAC Fine Chemicals LLC CA | Manufacturing | 1 | $165,000 | F |
| Ampac Fine Chemicals LLC TX | Manufacturing | 0 | — | C |
| AMPAC Fine Chemicals Texas LLC TX | Manufacturing | 1 | $97,635 | — |
| AMPAC Fine Chemicals Virginia LLC VA | Manufacturing | 0 | — | B |
| Ampac Holdings LLC OH | Manufacturing | 0 | — | C |
| Ampacet OH | Manufacturing | 0 | — | D |
| Ampacet Corp GA | Manufacturing | 0 | — | D |
| Ampacet Corp IN | Manufacturing | 0 | — | A |
| Ampacet Corporation LA | Manufacturing | 0 | — | A |
| AMPAIRE INC CA | Professional & Technical Services | 1 | $134,001 | — |
| AMPAL, Inc. PA | Manufacturing | 0 | — | F |
| AMPAM PARKS MECHANICAL CA | Construction | 0 | — | F |
| Ampco TN | — | 0 | — | — |
| AMPCO Contracting, Inc. CA | Construction | 0 | — | F |
| Ampco Distribution Services NY | Wholesale Trade | 0 | — | F |
| AMPCO North, Inc. CA | Construction | 0 | — | F |
| Ampco Pumps Company WI | Manufacturing | 0 | — | F |
| Ampco Roofing OH | Construction | 0 | — | A |
| Ampco Systems Parking/Ppm,LLC (Oakland Airport Pkg) CA | — | 0 | — | — |
| Ampcontrol Technologies Inc. NY | Professional & Technical Services | 1 | $96,848 | — |
| Ampcus IA | — | 0 | — | — |
| AMPCUS MD | — | 0 | — | — |
| AMPCUS, Inc. VA | Professional & Technical Services | 7 | $123,286 | — |
| Ampd Energy USA LLC DE | Utilities | 2 | $170,000 | — |
| Amped I LLC IL | Professional & Technical Services | 0 | — | A |
| Ampelmann Operations B.V. / Ampelmann USA Corps TX | Professional & Technical Services | 0 | — | F |
| Ampere Computing LLC CA | Manufacturing | 11 | $177,120 | — |
| Amperesand Inc. CA | Manufacturing | 2 | $208,902 | — |
| Amperity, Inc. WA | Professional & Technical Services | 2 | $170,155 | — |
| Ampersand Biomedicines, Inc. MA | Professional & Technical Services | 1 | $90,000 | — |
| Amphastar Pharmaceutical Inc. CA | Manufacturing | 0 | — | F |
| Amphenol AZ | Manufacturing | 0 | — | A |
| Amphenol CA | Manufacturing | 0 | — | A |
| Amphenol CT | Manufacturing | 0 | — | F |
| Amphenol FL | Manufacturing | 0 | — | A |
| Amphenol NH | Manufacturing | 0 | — | A |
| Amphenol NY | Manufacturing | 0 | — | C |
| Amphenol PA | Manufacturing | 0 | — | B |
| Amphenol Adronics KS | Manufacturing | 0 | — | C |
| Amphenol Advanced Sensors CA | Manufacturing | 0 | — | A |
| Amphenol Advanced Sensors PR | Manufacturing | 0 | — | A |
| Amphenol Aerospace AZ | Manufacturing | 0 | — | F |
| Amphenol Aerospace NY | Manufacturing | 0 | — | B |
