| Base Ventures | |
| Base-Two Investment Systems, Inc. | Massachusetts |
| Base10 | California |
| Base22, LLC | |
| Base4 Biotechnology, Inc. | North Carolina |
| Base44, Inc. | |
| Base5 Genomics, Inc. | California |
| Base64.ai, Inc. | |
| Baseblock Software, LLC | Florida |
| BaseCamp Ventures | New Jersey |
| BaseConnect | Oklahoma |
| BaseDash, Inc. | |
| Basejump | |
| Baselayer | New York |
| Baselayer Technology, LLC | |
| Baseline Creative, Inc. | |
| Baseline Data Systems, Inc. | California |
| Baselinemag | New York |
| Baselinev | California |
| Basepair | New York |
| Basepoint Ventures | |
| Baseten | California |
| Basetool, Inc. | |
| BaseVoice, LLC | Pennsylvania |
| Basewell | |
| Basewell, Inc. | Texas |
| Bash Biotech, Inc. | |
| BASi Research Products | Indiana |
| Basic Computer Center, Inc. | Idaho |
| Basic Computers Retired | Washington |
| Basic Electonics | California |
| Basic Software Systems | Texas |
| Basil Systems | Massachusetts |
| Basil Systems, Inc. | |
| Basilard BioTech | |
| Basilisk Games | Indiana |
| Basin Broadband, Inc. | Texas |
| BASIS International Ltd | New Mexico |
| Basis Set Builders, LLC | |
| Basis Technologies | Illinois |
| Basis Technology | Massachusetts |
| Basking Biosciences | Ohio |
| Basking Biosciences, Inc. | |
| Bass Computers, Inc. | Texas |
| Bassets | New Jersey |
| Basso Marketing Agency | |
| Bastille Networks, Inc. | Georgia |
| Bastion Internet, Inc. | California |
| Bastion Research Ltd | |
| BastionPoint Technologies | Virginia |