1. S3 Incorporated
  2. Sage
  3. Samsung Semiconductor (SEC)
  4. Samsung Electro-Mechanics
  5. SanDisk
  6. Sanken Electric
  7. Sanyo
  8. Scenix
  9. Seattle Silicon
  10. Seeq
  11. Seiko Epson
  12. Seiko Instruments (SII)
  13. Semelab
  14. Semiconductor Laser International (SLI)
  15. Semtech
  16. Sensory
  17. Serano Systems
  18. SGS-Thomson (-> STMicroelectronics)
  19. Sharp
  20. Shindengen
  21. SIDSA
  22. Siemens (->Infineon)
  23. Signal Processing Technologies (SPT)
  24. Signetics (-> Philips)
  25. Silicon Dynamics
  26. Silicon General Semiconductor
  27. Silicon Image
  28. Silicon Laboratories
  29. Silicon Storage Technology (SST)
  30. Silicon Systems (SSI) (-> Texas Instruments)
  31. Siliconians
  32. Siliconix
  33. Silicore
  34. Silonex
  35. Simtek
  36. Sipex
  37. SiQuest
  38. Sirius Communications
  39. SIS Microelectronics
  40. SiTera
  41. SMC (-> SMSC)
  42. S-MOS Systems
  43. Softcom Microsystems
  44. Solid State Optronics
  45. Solitron Devices
  46. Sony
  47. SPaSE
  48. Standard Microsystems Corp. (SMSC, was SMC)
  49. Stanford Microdevices (SMI)
  50. Stanford Telecom
  51. Stanley
  52. STMicroelectronics (was SGS-Thomson)
  53. Sumitomo Metals
  54. Summit Microelectronics
  55. Supertex
  56. Swindon Silicon Systems
  57. Switchcore
  58. Symbios
  59. Synergy
  60. Synova