| Balero Ventures | California |
| BalkanID, Inc. | Texas |
| Ball State University | Indiana |
| Ball State University Department of Computer Science | Indiana |
| Ball State University Department of Mathematical Sciences | Indiana |
| Ball Ventures | Idaho |
| Ballantyne Designs | North Carolina |
| Ballast Lane Applications, LLC | |
| Ballast Point Ventures | Florida |
| Ballistic Agency | |
| Ballistic Arts, Inc. | |
| Ballistic Ventures | |
| BALLOGY | |
| Balloon | California |
| Ballpark, LLC | Tennessee |
| BallStat | Pennsylvania |
| Balor University | Texas |
| Balsamiq Studios, LLC | California |
| Baltic Networks, Inc. | Illinois |
| Baltimore Computer Solutions, LLC | Maryland |
| Baltimore Perl Mongers | Maryland |
| Balto | Missouri |
| Balto Pharmaceuticals | |
| Baltoro, LLC | Illinois |
| Baltu Technologies, Inc. | Arizona |
| Balyasny Asset Management, L.P. | |
| BAM Technologies | |
| Bam Ventures | |
| Bambee | California |
| Bambenek Consulting Ltd | |
| Bamboo Rose, Inc. | |
| Bamboo Solutions | Virginia |
| Bamboo Technologies, Inc. | |
| BambooHR, LLC | Utah |
| Bambu Wallet | |
| BambuMeta | New York |
| Bambusa Therapeutics | |
| Bambusa Therapeutics, Inc. | |
| Ban-Koe Companies | Minnesota |
| Bananote, LLC | |
| Bancsource, Inc. | Missouri |
| Band Agency | |
| Band of Angels, LLC | California |
| Band of Coders | |
| Bandana | |
| BandaPixels, LLC | |
| Bandcamp | California |
| Bandgap Ventures | Texas |
| Bandicam | |
| Bandicoot | |