- Sangtec Molecular Diagnostics AB
- SANYO Biomedical Europe B.V.
- SANYO E&E Europe BV
- Sartorius Group
- Savyon Diagnostics
- Scharlab,S.L.
- Scie-Plas Limited
- Scientific Laboratory Supplies (SLS)
- SciGene
- SciLabware Ltd.
- SciLog, Inc.
- SDIX
- Seegene Inc.
- Sequenom Inc.
- SeraCare Life Sciences, Inc.
- Serion Immundiagnostica GmbH
- Serosep
- Severn Trent Services Analytical Services
- Seward Limited
- SGM Biotech, Inc.
- Sheldon Manufacturing
- Siemens Healthcare Diagnostics
- Siemens Medical Solutions
- Sigma-Aldrich Corp.
- SIRS-Lab GmbH
- SmartGene Services GmbH
- SoBran, Inc.
- Socorex Isba S.A
- Spectral Diagnostics Inc.
- Spiral Biotech, Inc.
- STARLIMS Corporation
- Starna Scientific Ltd
- Sterilin Ltd
- Steris Corporation
- Strategic Consulting, Inc.
- Sunquest Information Systems
- Sunquest Information Systems (Europe) Limited
- SY-LAB Geraete GmbH
- Synbiosis
- Synbiotics Corporation