| Entity Name | Type | License # | City | Status | Action |
|---|---|---|---|---|---|
| SMITHSONIAN TACTICAL ORGANIZATION INC | Business | 122000912 | OAK FOREST | NOT RENEWED | Verify |
| SNC INC | Business | 127001053 | DES PLAINES | NOT RENEWED | Verify |
| SNE DETECTIVE COMPANY, LLC | Business | 117001792 | CHICAGO | ACTIVE | Verify |
| SNEED & ASSOCIATES DETECTIVE AGENCY INC | Business | 117001618 | CHICAGO | NOT RENEWED | Verify |
| SOC SECURITY | Business | 122001084 | CHICAGO | ACTIVE | Verify |
| SOCIAL SLOOTH INC | Business | 117001917 | GALESBURG | ACTIVE | Verify |
| SOLID SECURITY | Business | 122000512 | CHICAGO | NOT RENEWED | Verify |
| SOLID SECURITY AND DETECTIVE AGENCY | Business | 122001034 | CHICAGO | NOT RENEWED | Verify |
| SOLID SECURITY AND DETECTIVE AGENCY | Business | 117001348 | CHICAGO | NOT RENEWED | Verify |
| SOLUTIA INC | Business | 120500097 | SAUGET | NOT RENEWED | Verify |
| SOLVED SECURITY INC | Business | 122001102 | LYONS | ACTIVE | Verify |
| SOLVED SECURITY INC | Business | 117001382 | CICERO | NOT RENEWED | Verify |
| SONITROL SECURITY SYSTEMS OF PEORIA INC | Business | 127000636 | PEORIA | INOPERATIVE | Verify |
| SONTEC SYSTEMS | Business | 127000625 | CARY | NOT RENEWED | Verify |
| SORENSEN INVESTIGATIVE AGCY INC | Business | 117000473 | WASHINGTON | NOT RENEWED | Verify |
| SOS INTELLECTUAL SECURITY LTD | Business | 122001266 | CHICAGO | NOT RENEWED | Verify |
| SOS PROCESS SERVICE LLC | Business | 117001534 | LIBERTYVILLE | NOT RENEWED | Verify |
| SOS SECURITY INCORPORATED | Business | 122000822 | CHICAGO | NOT RENEWED | Verify |
| SOS SECURITY OF ILLINOIS LLC | Business | 123000444 | CHICAGO | CLOSED | Verify |
| SOS SECURITY OF ILLINOIS LLC | Business | 122001269 | CHICAGO | CLOSED | Verify |
| SOUND AND SECURE INC | Business | 127000822 | SHOREWOOD | ACTIVE | Verify |
| SOUND INCORPORATED | Business | 127000068 | NAPERVILLE | ACTIVE | Verify |
| SOUND OFF ALARM INC | Business | 127000268 | ITASCA | INACTIVE | Verify |
| SOURCE ONE SOLUTIONS, INC. | Business | 117001899 | SOUTH HOLLAND | ACTIVE | Verify |
| SOURCE ONE SOLUTIONS, INC. | Business | 122001587 | SOUTH HOLLAND | ACTIVE | Verify |
| SOURCE ONE SOLUTIONS, INC. | Business | 262000165 | SOUTH HOLLAND | ACTIVE | Verify |
| SOUTH CENTRAL BANK & TRUST CO | Business | 120500085 | CHICAGO | NOT RENEWED | Verify |
| SOUTH SHORE HOSPITAL | Business | 120100040 | CHICAGO | NOT RENEWED | Verify |
| SOUTH SIDE BANK | Business | 120000026 | CHICAGO | NOT RENEWED | Verify |
| SOUTH SIDE TRUST AND | Business | 120500071 | PEORIA | NOT RENEWED | Verify |
| SOUTH SUBURBAN COLLEGE | Business | 102000159 | HARVEY | ACTIVE | Verify |
| SOUTH SUBURBAN FIRE ALARMS, PLLC | Business | 127001847 | TINLEY PARK | ACTIVE | Verify |
| SOUTH SUBURBAN SECURITY TRAINING INSTIT | Business | 102000002 | CHICAGO HEIGHTS | ACTIVE | Verify |
| SOUTHEASTERN ILLINOIS COLLEGE | Business | 102000083 | HARRISBURG | ACTIVE | Verify |
| SOUTHEASTERN ILLINOIS COLLEGE | Business | 102000111 | HARRISBURG | ACTIVE | Verify |
| SOUTHEASTERN SECURITY AND | Business | 122000559 | CENTRALIA | NOT RENEWED | Verify |
| SOUTHERN ELECTRONICS & TELEPHONE INC | Business | 127001100 | HARRISBURG | NOT RENEWED | Verify |
| SOUTHERN FINANCIAL INC DBA AMERICAN FIREARM TRAINING AND EDUCATION | Business | 262000068 | PINCKNEYVILLE | NOT RENEWED | Verify |
| SOUTHERN ILL SECURITY CONSULTANTS INC | Business | 122001199 | MURPHYSBORO | NOT RENEWED | Verify |
| SOUTHERN ILLINOIS FINGERPRINTING INC | Business | 262000051 | GLEN CARBON | NOT RENEWED | Verify |
| SOUTHERN ILLINOIS INVESTIGATIONS | Business | 117001256 | MARION | NOT RENEWED | Verify |
| SOUTHERN ILLINOIS LOCK & KEY CO | Business | 192000191 | CARBONDALE | NOT RENEWED | Verify |
| SOUTHERN ILLINOIS SECURITY | Business | 122001200 | MURPHYSBORO | NOT RENEWED | Verify |
| SOUTHERN ILLINOIS SECURITY | Business | 122000948 | MARION | NOT RENEWED | Verify |
| SOUTHERN ILLINOIS SECURITY CONSULTANTS | Business | 122000621 | MURPHYSBORO | NOT RENEWED | Verify |
| SOUTHERN ILLINOIS UNIVERSITY | Business | 201000828 | CARBONDALE | ACTIVE | Verify |
| SOUTHERN PRAIRIE CLAIMS INC | Business | 117000693 | CAHOKIA | NOT RENEWED | Verify |
| SOUTHWEST BANK | Business | 120500088 | BELLEVILLE | CLOSED | Verify |
| SOUTHWEST SENTRY SECURITY SYSTEMS INC | Business | 127000187 | MOKENA | NOT RENEWED | Verify |
| SOUTHWESTERN ELECTRIC COMPANY | Business | 127000226 | BELLEVILLE | CANCELLED | Verify |