| Entity Name | Type | License # | City | Status | Action |
|---|---|---|---|---|---|
| SILVERHAWK SECURITY SPECIALISTS INC | Business | 122000666 | BEARDSTOWN | NOT RENEWED | Verify |
| SILVERHAWK SECURITY SPECIALISTS INC | Business | 123000231 | ROCHELLE | NOT RENEWED | Verify |
| SILVERTON LOCK & KEY LLC | Business | 192000287 | PALOS HEIGHTS | NOT RENEWED | Verify |
| SIMPLEX TIME RECORDER COMPANY | Business | 127000360 | LOMBARD | NOT RENEWED | Verify |
| SIMPLEX TIME RECORDER COMPANY | Business | 128000011 | PEORIA | NOT RENEWED | Verify |
| SIMPLEX TIME RECORDER COMPANY | Business | 128000091 | EAST PEORIA | NOT RENEWED | Verify |
| SIMPLEX TIME RECORDER COMPANY | Business | 128000106 | LOVES PARK | NOT RENEWED | Verify |
| SINCLAIR SERVICES LTD | Business | 127000339 | FREEPORT | NOT RENEWED | Verify |
| SIPCO PRODUCTS INC | Business | 262000065 | PEORIA HEIGHTS | NOT RENEWED | Verify |
| SIUE EAST ST LOUIS CAMPUS | Business | 201000204 | EAST ST LOUIS | ACTIVE | Verify |
| SIZEMORE INC | Business | 122001551 | WESTCHESTER | INOPERATIVE | Verify |
| SKOKIE VALLEY DETECTIVE AGCY LTD | Business | 123000009 | CHICAGO | NOT RENEWED | Verify |
| SKOKIE VALLEY DETECTIVE AGCY LTD | Business | 122000417 | SKOKIE | NOT RENEWED | Verify |
| SKOKIE VALLEY DETECTIVE AGENCY LTD | Business | 118000001 | CHICAGO | NOT RENEWED | Verify |
| SKOKIE VALLEY DETECTIVE AGENCY LTD | Business | 117000171 | SKOKIE | NOT RENEWED | Verify |
| SKY SECURITY SERVICES ILLINOIS INC | Business | 122001164 | CHICAGO | NOT RENEWED | Verify |
| SKYLINE ENTERPRISES LTD | Business | 201000067 | CHICAGO | ACTIVE | Verify |
| SKYLINE ENTERPRISES LTD | Business | 122000231 | CHICAGO | NOT RENEWED | Verify |
| SKYLINE ENTERPRISES LTD | Business | 117000265 | CHICAGO | NOT RENEWED | Verify |
| SKYLINE MERCHANT PATROL | Business | 201000020 | CHICAGO HEIGHTS | ACTIVE | Verify |
| SKYLINE MERCHANT PATROL | Business | 122000098 | CHICAGO HEIGHTS | CLOSED | Verify |
| SKYLINE SECURITY SERVICES | Business | 122000489 | SAUK VILLAGE | INOPERATIVE | Verify |
| SKYLINE SECURITY TRAINING CENTER LIMITED | Business | 102000403 | OAK FOREST | ACTIVE | Verify |
| SKYTECH ENTERPRISES LTD | Business | 122000882 | CHICAGO | ACTIVE | Verify |
| SKYTECH SECURITY SERVICES LLC | Business | 122000823 | CHICAGO | CLOSED | Verify |
| SL&A INVESTIGATIONS LLC | Business | 117001583 | CHICAGO | NOT RENEWED | Verify |
| SLAN INCORPORATED | Business | 117001205 | GLENVIEW | INOPERATIVE | Verify |
| SLAVISH AND ASSOCIATES LTD | Business | 122000229 | MOLINE | INOPERATIVE | Verify |
| SLAVISH AND ASSOCIATES LTD | Business | 117000262 | MOLINE | INOPERATIVE | Verify |
| SLEUTH AND ASSOCIATES | Business | 122000045 | SPRINGFIELD | NOT RENEWED | Verify |
| SLEUTH AND ASSOCS PRIVATE INVESTIGATIONS | Business | 117000056 | SPRINGFIELD | NOT RENEWED | Verify |
| SLEVNIK INVESTIGATIONS | Business | 117001048 | HICKORY HILLS | NOT RENEWED | Verify |
| SLICKMAN PRIVATE DETECTIVE AGENCY LLC | Business | 117001634 | ROCKFORD | NOT RENEWED | Verify |
| SLOAN VALVE COMPANY | Business | 120500152 | FRANKLIN PARK | ACTIVE | Verify |
| SLOAN VALVE COMPANY SECURITY DEPT | Business | 120100026 | FRANKLIN PARK | NOT RENEWED | Verify |
| SLOCOMB DETECTIVE SERVICE | Business | 122000052 | WOODRIDGE | NOT RENEWED | Verify |
| SLOCOMB DETECTIVE SERVICE | Business | 117000294 | WOODRIDGE | NOT RENEWED | Verify |
| SLS TECHNOLOGY INC | Business | 127001447 | BUFFALO GROVE | ACTIVE | Verify |
| SMG SECURITY HOLDINGS LLC | Business | 127001709 | ELK GROVE VILLAGE | ACTIVE | Verify |
| SMG SECURITY SYSTEMS INC | Business | 127000893 | ELK GROVE VILLAGE | NOT RENEWED | Verify |
| SMILEY AND ASSOCIATES | Business | 117000924 | ROCK ISLAND | NOT RENEWED | Verify |
| SMITH AND ASSOCIATES | Business | 117000423 | CHICAGO | NOT RENEWED | Verify |
| SMITH AND ASSOCIATES | Business | 122000087 | CHICAGO | NOT RENEWED | Verify |
| SMITH DETECTIVE AGENCY INC | Business | 117000985 | DANVILLE | INOPERATIVE | Verify |
| SMITH ELECTRIC CO | Business | 127000690 | BARRINGTON | INOPERATIVE | Verify |
| SMITH INVESTIGATIONS INC | Business | 118000209 | URBANA | NOT RENEWED | Verify |
| SMITH INVESTIGATIONS INC | Business | 117001038 | DANVILLE | NOT RENEWED | Verify |
| SMITH SECURITY CORPORATION | Business | 122000710 | CHICAGO | NOT RENEWED | Verify |
| SMITH SURVEILLANCE INC | Business | 117001289 | SAINT CHARLES | ACTIVE | Verify |
| SMITHSONIAN TACTICAL ORGANIZATION INC | Business | 117001011 | OAK FOREST | NOT RENEWED | Verify |