| SISensortronics INC | Covina | — | ◇ UNVERIFIED |
| SESgb Enterprises INC | Santa Clarita | — | ◇ UNVERIFIED |
| SISharp Image Gamming INC | Chatsworth | — | ◇ UNVERIFIED |
| SWShintom West CORP of America | Torrance | — | ◇ UNVERIFIED |
| SLSierra Lobo INC | Pasadena | — | ◇ UNVERIFIED |
 Silc Technologies INC | Los Angeles | — | ◇ UNVERIFIED |
| SESlocombe Enterprises INC Dba Halseys Auto Center | Canyon Country | — | ◇ UNVERIFIED |
| SDSmiths Detection | Inglewood | — | ◇ UNVERIFIED |
| SESolar Electronics Company | North Hollywood | — | ◇ UNVERIFIED |
| SPSolo Power Equipment, LLC | West Covina | — | ◇ UNVERIFIED |
| SESonic Electronix INC. | Valencia | — | ◇ UNVERIFIED |
| SPSource Photonics | West Hills | — | ◇ UNVERIFIED |
 Southwestern Industries INC | Rancho Dominguez | — | ◇ UNVERIFIED |
| SESpace Exploration Technologies | Hawthorne | — | ◇ UNVERIFIED |
| SSSpace Systems Loral | Long Beach | — | ◇ UNVERIFIED |
| SVSpace Vector Corporation | Chatsworth | — | ◇ UNVERIFIED |
| SISpatron INC | Los Angeles | — | ◇ UNVERIFIED |
| SLSpectradyne LLC | Torrance | — | ◇ UNVERIFIED |
| SISpectrolab, INC | Sylmar | — | ◇ UNVERIFIED |
| SISpinlaunch INC | Long Beach | — | ◇ UNVERIFIED |
| SCSru Corporation | Pasadena | — | ◇ UNVERIFIED |
| SAStandard Aero Business Aviation Services LLC | Van Nuys | — | ◇ UNVERIFIED |
| SZStantron Zero CORP Div | North Hollywood | — | ◇ UNVERIFIED |
| SIStarled INC | Rancho Dominguez | — | ◇ UNVERIFIED |
| SMStellar Microelectronics INC Dba Neo Tech | Valencia | — | ◇ UNVERIFIED |
| SJSteve J. Crisanti and Tammy A. Crisanti, Trustees of Crisanti Living Trust, date | Whittier | — | ◇ UNVERIFIED |
| SJSt Jude Medical | Sylmar | — | ◇ UNVERIFIED |
| SPStock Point Electronics INC | Chatsworth | — | ◇ UNVERIFIED |
| SAStudio Art & Tecnology, LLC | Chatsworth | — | ◇ UNVERIFIED |
| TITalon Instruments | San Dimas | — | ◇ UNVERIFIED |
| TCTechno Components INC | Van Nuys | — | ◇ UNVERIFIED |
 Tektronix, INC. | Covina | — | ◇ UNVERIFIED |
 Teledyne Controls Div Teledyn | Los Angeles | — | ◇ UNVERIFIED |
| TETeledyne Electronic Systems | Northridge | — | ◇ UNVERIFIED |
| TMTeledyne Microelectronic Techonolgies | Los Angeles | — | ◇ UNVERIFIED |
| TRTeledyne Reynolds INC | Los Angeles | — | ◇ UNVERIFIED |
| TCTelevision City Productions, LLC | Los Angeles | — | ◇ UNVERIFIED |
| TSTellkamp Sys INC | Santa Fe Springs | — | ◇ UNVERIFIED |
| TBThe Boeing Company | El Segundo | — | ◇ UNVERIFIED |
| TBThe Boeing Company | El Segundo | — | ◇ UNVERIFIED |
| TBThe Boeing Company | Torrance | — | ◇ UNVERIFIED |
| TPThe Paladin Group | West Hollywood | — | ◇ UNVERIFIED |
| TIThis Is a Test for E-manifest in Production | Long Beach | — | ◇ UNVERIFIED |
| TTitan/sesco | Chatsworth | — | ◇ UNVERIFIED |
| TPTopanga Productions | Los Angeles | — | ◇ UNVERIFIED |
| TTTransaction Tech INC | Los Angeles | — | ◇ UNVERIFIED |
| TTribogenics | Los Angeles | — | ◇ UNVERIFIED |
| TLTrue Lee Loudspeakers, LLC | Los Angeles | — | ◇ UNVERIFIED |
| TLTrue Lee Loudspeakers, LLC | Los Angeles | — | ◇ UNVERIFIED |
| TSTrue Story | Los Angeles | — | ◇ UNVERIFIED |
