| Entity Name | Type | License # | City | Status | Action |
|---|---|---|---|---|---|
| D C L SECURITY INC | Business | 117000248 | BOLINGBROOK | CANCELLED | Verify |
| D E GAFFNEY SECURITY | Business | 122000138 | HAMPSHIRE | CLOSED | Verify |
| D E GAFFNEY SECURITY | Business | 127000044 | HAMPSHIRE | CLOSED | Verify |
| D E GAFFNEY SECURITY | Business | 117000195 | HAMPSHIRE | CLOSED | Verify |
| D L S PRIVATE DETECTIVE AGENCY | Business | 117000380 | VILLA PARK | NOT RENEWED | Verify |
| D L S SECURITY PATROL | Business | 122000317 | VILLA PARK | NOT RENEWED | Verify |
| D M C SECURITY SERVICES INC | Business | 127000032 | MIDLOTHIAN | ACTIVE | Verify |
| D M C SECURITY SERVICES INC | Business | 117000156 | MIDLOTHIAN | NOT RENEWED | Verify |
| D M C SECURITY SERVICES INC | Business | 122000202 | EVERGREEN PARK | NOT RENEWED | Verify |
| D P S PROTECTION SYSTEMS | Business | 201000112 | EAST ST LOUIS | ACTIVE | Verify |
| D S C SECURITY | Business | 117000069 | PARK FOREST | INOPERATIVE | Verify |
| D S C SECURITY INC | Business | 122000059 | PARK FOREST | INOPERATIVE | Verify |
| D W MACHINE PRODUCTS | Business | 120100107 | HIGHLAND | NOT RENEWED | Verify |
| D W MACHINE PRODUCTS | Business | 102000189 | HIGHLAND | ACTIVE | Verify |
| D-TECT INVESTIGATIONS | Business | 117000701 | CHICAGO | NOT RENEWED | Verify |
| D.M.G. SECURITY INC | Business | 262000076 | CHICAGO | ACTIVE | Verify |
| D.M.G. SECURITY INC | Business | 122001303 | CHICAGO | NOT RENEWED | Verify |
| D.M.G. SECURITY INC | Business | 265000006 | CHICAGO | ACTIVE | Verify |
| D'JOY ALARM SYSTEMS INC | Business | 127000302 | MARSEILLES | ACTIVE | Verify |
| D/B/A REEF SECURITY SOLUTIONS PLLC | Business | 122001548 | CHICAGO | NOT RENEWED | Verify |
| D&S PRIVATE DETECTIVE, INC | Business | 122001573 | BARTONVILLE | ACTIVE | Verify |
| D&S PRIVATE DETECTIVE, INC | Business | 117001885 | BARTONVILLE | ACTIVE | Verify |
| D1 NETWORKS LLC | Business | 127001692 | CHAMPAIGN | NOT RENEWED | Verify |
| DAHL PROCESS SERVING & DETECTIVE AGCY INC | Business | 117001066 | SOUTH ELGIN | NOT RENEWED | Verify |
| DAILEY PROTECTION INC | Business | 117001362 | CHICAGO | NOT RENEWED | Verify |
| DAKOTA SECURITY SYSTEMS INC | Business | 128000206 | PALATINE | NOT RENEWED | Verify |
| DAKOTA SECURITY SYSTEMS INC | Business | 192000269 | PALATINE | NOT RENEWED | Verify |
| DAN HARNETT INVESTIGATIONS | Business | 117000665 | RIVER GROVE | NOT RENEWED | Verify |
| DAN HARNETT INVESTIGATIONS | Business | 122000572 | RIVER GROVE | NOT RENEWED | Verify |
| DAN THE KEY MAN INC | Business | 192000161 | LIBERTYVILLE | NOT RENEWED | Verify |
| DANIEL J CONIDI AND ASSOCS | Business | 117000542 | CHICAGO | NOT RENEWED | Verify |
| DANIELS ELECTRICAL SERVICE CORP | Business | 127000375 | CHICAGO | NOT RENEWED | Verify |
| DANMARK SECURITY LLC | Business | 122000849 | CHICAGO | ACTIVE | Verify |
| DANMARK SECURITY TRAINING SCHOOL | Business | 102000254 | CHICAGO | ACTIVE | Verify |
| DANNAN SECURITY INC | Business | 127000857 | CHICAGO | NOT RENEWED | Verify |
| DANNAN SECURITY INC | Business | 122000589 | CHICAGO | NOT RENEWED | Verify |
| DANNAN SECURITY INC | Business | 117000687 | CHICAGO | NOT RENEWED | Verify |
| DANNY KEYS 247 INC | Business | 192000332 | NORTHBROOK | ACTIVE | Verify |
| DANVILLE DETECTIVE AGENCY | Business | 117000045 | DANVILLE | INOPERATIVE | Verify |
| DANVILLE DETECTIVE AGENCY | Business | 122000038 | DANVILLE | INOPERATIVE | Verify |
| DARCI ASSOCIATES | Business | 127000111 | CHICAGO | NOT RENEWED | Verify |
| DARK GROUP INC | Business | 117001246 | OAK PARK | NOT RENEWED | Verify |
| DARK GROUP INC | Business | 118000217 | CHICAGO | NOT RENEWED | Verify |
| DARK STAR DETECTIVE | Business | 102000036 | MT VERNON | ACTIVE | Verify |
| DARK STAR DETECTIVE AGENCY | Business | 117000405 | MOUNT VERNON | NOT RENEWED | Verify |
| DARK STAR DETECTIVE AGENCY INC | Business | 122000455 | MOUNT VERNON | CANCELLED | Verify |
| DARNALL GUNWORKS & RANGES FIREARM | Business | 102000274 | BLOOMINGTON | ACTIVE | Verify |
| DARPIS INVESTIGATIONS INC | Business | 117001121 | SOUTH HOLLAND | ACTIVE | Verify |
| DARPIS SECURITY INC | Business | 122000865 | SOUTH HOLLAND | ACTIVE | Verify |
| DARRAH AND LEIBRECHT | Business | 117000415 | HICKORY HILLS | NOT RENEWED | Verify |