| Antares Technology Solutions | Louisiana |
| Antares Therapeutics | |
| Antcom Corporation | California |
| Antech Systems, Inc. | |
| Antek Systems, LLC | Maryland |
| Antelecom, Inc. | California |
| Antelope Valley College | California |
| Antelope Web | |
| Antenen Robotics | Ohio |
| Antenna Associates | Massachusetts |
| Antenna Group | |
| Antenna House | Delaware |
| Antenna Research Associates, Inc. | Maryland |
| Antenna World | Florida |
| Antennas Direct | Missouri |
| Antennas for Communications | Florida |
| Antennasys, Inc. | New Hampshire |
| Anteriad, LLC | New York |
| Anterra Technology Holding, LLC | Texas |
| Antesky Science Technology, Inc. | |
| Antharis Therapeutics | |
| Antheia, Inc. | California |
| Anthem Content, LLC | |
| Anthem Venture Partners | California |
| Anthemis | |
| Antheus Capital | New Jersey |
| Antheus Technology, Inc. | Florida |
| Anthill | |
| Anthologic | |
| Anthology | Michigan |
| Anthony Savino | |
| Anthony Technology, LLC | Oklahoma |
| Anthony Web Design | North Carolina |
| Anthony's Computer | Virginia |
| Anthos Therapeutics | |
| Anthro | California |
| Anthro-Tech, Inc. | Washington |
| Anthropic | California |
| Anthropos | |
| Anthym | Arizona |
| Antibodies, Inc. | California |
| Antibody Design Labs | California |
| Antibody Research Corporation | |
| Antibody Solutions | California |
| Antibody Systems, Inc. | Texas |
| Anticipate Ventures | Missouri |
| Anticipated Digital, LLC | |
| Antics Marketing Solutions | |
| Antidote Solutions | New York |
| Antidote Technologies, Inc. | Florida |