- Sekisui Diagnostics, LLC
- Sempermed USA
- Sepracore
- Siemens Diagnostics
- Simport Plastics
- Simport Scientific
- Smith & Nephew, Inc.
- Smiths Medical ASD, Inc.
- Smiths Medical ASD, Inc. - See ICU Medical
- SockIt/McMerlin Dental Products
- Sol-Millennium Medical Inc.
- Sol-Millennium Medical, Inc.
- Solon Manufacturing - SEE AMD-RITMED
- Solventum Corporation
- Sombra Professional Therapy Products
- Sombra Wellness Products
- Southwest Technologies, Inc.
- SpecLinc
- SpecLinc Products, LLC
- Stable Step
- Stanbio Laboratory, L.P.
- Stat Medical Devices, Inc.
- State Surgical
- Stopain® Clinical
- Stradis Healthcare