| Aleta BioTherapeutics | |
| Aletheia Interactive | |
| Alex Beals | |
| Alex Beige Web Dev | |
| Alex Design, LLC | Florida |
| Alex Furfaro SEO Consulting | |
| Alex MacCaw | |
| Alex PC Tech, LLC | Minnesota |
| Alex Rice | |
| Alex White | Oregon |
| Alexander & Tom, Inc. | |
| Alexander Capital Ventures, LLC | New Jersey |
| Alexander Computer Technologies of Arizona, LLC | Arizona |
| Alexander Online Media | |
| Alexandria Data, LLC | Connecticut |
| Alexandria Library Management Software | Utah |
| Alexandria Point of Sale | Florida |
| Alexey Cherkasov | Pennsylvania |
| Alexion Pharmaceuticals, Inc. | |
| Alexis Information Systems, LLC | Arkansas |
| Alexsander Studios | |
| Alfa Chemistry | |
| Alfa Cytology | |
| Alfa hosting services & VDS, Inc.. | Georgia |
| Alfa Jango, LLC | Michigan |
| Alfa Scientific Designs, Inc. | California |
| Alfa Web Coders | |
| Alfahive | New Jersey |
| Alfasigma USA, Inc. | |
| Alfatek Digital | |
| Alfred State College of Technology | New York |
| Alfred University | New York |
| AlfredCamera | |
| Alfresco | California |
| ALG Systems, Inc. | Massachusetts |
| Alga Biosciences | |
| Algebra Buster | Texas |
| Algebra Fun Sheets | California |
| Algebra Homework Help | Illinois |
| Algebra-Class | Maryland |
| Algemetric, LLC | Colorado |
| Alger | |
| Algernon Health, Inc. | |
| Algo Clan, Inc. | |
| AlgoExpert, LLC | |
| Algok Bio, Inc. | |
| Algoma | |
| Algomedix | |
| AlgoPear | |
| Algopix Holdings Ltd | California |