S
- Sainsbury's – John James Sainsbury
- Saks Fifth Avenue – Andrew Saks
- Saleen – Steve Saleen
- Sam's Club – Sam Walton
- Samsonite – Samson
- Santoni – Andrea and Rosa Santoni
- Sauber – Peter Sauber
- Savoia-Marchetti – Umberto Savoia and Alessandro Marchetti
- Sbarro (U.S. pizza restaurant chain) – Gennaro and Carmela Sbarro
- Sbarro (Swiss automaker) – Franco Sbarro
- S. C. Johnson & Son – Samuel Curtis Johnson, Sr.
- Schnitzer Motorsport – Josef and Herbert Schnitzer
- Schumacher Racing Products – Cecil Schumacher
- Schwinn Bicycle Company – Ignaz Schwinn
- SCHWIND eye-tech-solutions - Herbert Schwind
- Scott – Ed Scott
- Sears – Richard Warren Sears
- Formerly Sears, Roebuck – Sears and Alvah Roebuck
- Seeburg Corporation – Justus Sjöberg (Anglicized name)
- Seecamp – Ludwig Wilhelm "Louis" Seecamp
- Seedorf Racing – Clarence Seedorf
- Sennheiser electronic – Fritz Sennheiser
- Shakespeare Fishing Tackle – William Shakespeare, Jr.
- Shanghai Tang – David Tang
- Shaw Brothers Studio, Shaw Organisation – Run Run Shaw and Runme Shaw
- Sheetz – Bob Sheetz
- Sherwin-Williams Company – Henry Sherwin and Edward Williams
- Shimano – Shozaburo Shimano
- Shugart Associates – Alan Shugart
- Shure Incorporated – Sidney Shure
- Siemens AG – Werner von Siemens
- Sikorsky Aircraft – Igor Sikorsky
- Simpson Performance Products – Bill Simpson
- Sinclair Radionics, Sinclair Research, Sinclair Vehicles – Clive Sinclair
- Singer Corporation – Isaac Merritt Singer
- Skip Barber Racing School – Skip Barber
- Smith & Wesson – Horace Smith and Daniel B. Wesson
- Sopwith Aviation Company – Thomas Sopwith
- Sotheby's – John Sotheby
- Spice Engineering – Gordon Spice
- SRAM Corporation – Scott King, Stanley Ray Day, and SAM Patterson
- Standard & Poor's – Henry Varnum Poor
- Stanley Black & Decker – Frederick Trent Stanley, S. Duncan Black, and Alonzo G. Decker
- Formerly Stanley Works, named after the aforementioned Stanley.
- Steinway & Sons – Henry E. Steinway
- Stern – Sam Stern
- Stewart Grand Prix – Jackie and Paul Stewart
- Stewart Haas Racing – Tony Stewart and Gene Haas (via Haas Automation)
- Stewart-Warner – John K. Stewart and Arthur P. Warner
- Stihl – Andreas Stihl
- Stillen – STeve MILLEN
- Stockmann – Georg Franz Stockmann
- Stone Brothers Racing – Ross and Jim Stone
- Strömberg – Gottfrid Strömberg
- Sturm, Ruger – Alexander McCormick Sturm and William B. Ruger
- Stutz Motor Company – Harry C. Stutz
- Sukhoi – Pavel Sukhoi
- Don Bluth Entertainment – Don Bluth and Morris Sullivan
- Sumitomo Group – Sumitomo Masatomo
- Super Aguri F1 – Aguri Suzuki
- Surtees – John Surtees
- Suzuki – Michio Suzuki
- Swarovski – Daniel Swarovski
Read more about this topic: List Of Companies Named After People