- Bactest Limited
- BaseClear B.V.
- BCC Research
- BD Diagnostic Systems
- Beckman Coulter
- Beckman Coulter Inc.
- Bertin Technologies
- Bibby Scientific Limited
- Bibby Scientific Ltd
- Binax, Inc.
- BIO Plas, Inc.
- Bio-Rad Laboratories
- Bio-Rad Laboratories, S.A.
- Biochrom Ltd
- BioCision, LLC
- BioConnections
- BioControl Systems Inc.
- BioDtech, Inc.
- BIOHIDRICA
- Biohit
- Biolog Inc.
- BioLumix, Inc.
- bioMérieux (clinical diagnostic applications)
- bioMérieux (industrial applications)
- Bioo Scientific Corporation
- Bioscrypt Inc.
- BIOTECON Diagnostics GmbH
- BioTek Instruments, Inc.
- BioTool AG
- BioTX Automation, Inc.
- BJS Biotechnologies
- Brady Corporation Limited
- Bridge4Bio, LLC
- Bruker Daltonics Inc