| Alltegrio | |
| Alltek Circuit | Texas |
| Alltemated, Inc. | Illinois |
| Allterum Therapeutics | |
| AllTheRooms | |
| AllTheRooms, Inc. | |
| AllThingsAI | |
| Alltrack USA | Georgia |
| Alltrna | Massachusetts |
| Allucent | North Carolina |
| Allumia, Inc. | |
| Allurata, Inc. | |
| Allure Digital | |
| Allure Security | Massachusetts |
| Allurion Technologies | Massachusetts |
| Alluvus, LLC | District of Columbia |
| Alluxio, Inc. | California |
| Allvision | Pennsylvania |
| Allvivo Vascular, Inc. | California |
| AllVoices | California |
| Allvue Systems | Florida |
| Allways, Inc. | Illinois |
| AllWebCo | Alabama |
| Allwebjobs.com | Louisiana |
| ALLWIN Informatics, Inc. | |
| Allwin21 Corporation | California |
| Ally Techno Grit Solutions Corporation | |
| Ally.io | Washington |
| AllyCloud | |
| Allyhealth Solutions | Texas |
| Allyis, Inc. | |
| Allyx Therapeutics, Inc. | |
| ALM Corporation | |
| ALM Global, LLC | New York |
| Alma College Computer Science | Michigan |
| Alma College Mathematics | Michigan |
| Almabase, Inc. | |
| AlmaConnect | |
| Almaden Genomics, LLC | Texas |
| AlmaLinux OS Foundation | Florida |
| Almatica Pharma, LLC | |
| Almatron Electronics, Inc. | California |
| Almaworks | New York |
| ALMAX | Washington |
| ALMAX design agency | |
| Almaz Capital | California |
| Almeida & Associates | Massachusetts |
| Almo Corporation | Maryland |
| Almod Corporation | California |
| Almodovar Group, LLC | |