| CLASSIFIED INVESTIGATION BUREAU INC | Business | 117000904 | OAK BROOK | NOT RENEWED | Verify |
| E L JOHNSON INVESTIGATIONS | Business | 117000912 | GLENVIEW | ACTIVE | Verify |
| GLENBROOK ENTERPRISES INC | Business | 117000913 | WHEELING | NOT RENEWED | Verify |
| US INVESTIGATIONS SERVICES INC | Business | 117000914 | OAK BROOK | INOPERATIVE | Verify |
| GDK & ASSOCIATES INC | Business | 117000923 | ELMHURST | NOT RENEWED | Verify |
| ESI INVESTIGATIONS | Business | 117000925 | PEORIA | NOT RENEWED | Verify |
| THOMAS SECURITY & INVESTIGATIONS LLC | Business | 117000933 | CHICAGO | NOT RENEWED | Verify |
| HANRAHAN INVESTIGATIONS INC | Business | 117000934 | HILLSIDE | ACTIVE | Verify |
| CONDOR INVESTIGATIVE AGENCY INC | Business | 117000948 | NAPERVILLE | NOT RENEWED | Verify |
| SPYGLASS PRE-EMPLOYMENT SPECIALISTS, INC. | Business | 117000952 | CHICAGO | NOT RENEWED | Verify |
| PRO-ACTIVE RESEARCH COMPANY INC | Business | 117000959 | OAK BROOK | NOT RENEWED | Verify |
| HARRIS PRIVATE INVESTIGATIVE SERVICES INC | Business | 117000962 | CHICAGO | INOPERATIVE | Verify |
| TKO SECURITY & INVESTIGATIONS INC | Business | 117000965 | CHICAGO | CLOSED | Verify |
| FERRET DIVERSIFIED SERVICES INC | Business | 117000977 | HIGHLAND PARK | NOT RENEWED | Verify |
| AMERICAN HERITAGE PROTECTIVE SERVICES INC | Business | 117000980 | ALSIP | INOPERATIVE | Verify |
| FWB INC | Business | 117001010 | WINFIELD | NOT RENEWED | Verify |
| SMITHSONIAN TACTICAL ORGANIZATION INC | Business | 117001011 | OAK FOREST | NOT RENEWED | Verify |
| RIVER BEND INVESTIGATIONS | Business | 117001017 | COLLINSVILLE | NOT RENEWED | Verify |
| ABSOLUTE INVESTIGATIONS & | Business | 117001018 | CHICAGO | NOT RENEWED | Verify |
| BROWDER'S MAXIMUM SECURITY DETECTIVE AGCY INC | Business | 117001024 | CHICAGO | NOT RENEWED | Verify |
| A-PRO INVESTIGATIVE SERVICES INC | Business | 117001027 | OFALLON | NOT RENEWED | Verify |
| CORPORATE SECURITY AND PROFESSIONAL SERVICES INC | Business | 117001037 | CHICAGO | NOT RENEWED | Verify |
| SMITH INVESTIGATIONS INC | Business | 117001038 | DANVILLE | NOT RENEWED | Verify |
| INFORCE INC | Business | 117001043 | CHICAGO | NOT RENEWED | Verify |
| TBX ASSOCIATES INC | Business | 117001050 | DOWNERS GROVE | NOT RENEWED | Verify |
| DAHL PROCESS SERVING & DETECTIVE AGCY INC | Business | 117001066 | SOUTH ELGIN | NOT RENEWED | Verify |
| AMERITRAK INVESTIGATIONS | Business | 117001081 | BLOOMINGDALE | NOT RENEWED | Verify |
| ACUMEN PROBE LLC | Business | 117001088 | CHICAGO | ACTIVE | Verify |
| THE DETECTIVE GROUP LTD | Business | 117001093 | BRIDGEVIEW | NOT RENEWED | Verify |
| ASAP PROCESS SERVICE & INVESTIGATIONS LLC | Business | 117001095 | CHICAGO | ACTIVE | Verify |
| ILLINOIS BUREAU OF INVESTIGATION | Business | 117001100 | CHICAGO | CANCELLED | Verify |
| UNITED PROCESSING INC | Business | 117001101 | CHICAGO | ACTIVE | Verify |
| ACCURATE INVESTIGATIVE GROUP INC | Business | 117001109 | DARIEN | NOT RENEWED | Verify |
| CHI STAR SECURITY SYSTEMS INC | Business | 117001110 | CHICAGO | NOT RENEWED | Verify |
| HUSARIK INC | Business | 117001130 | BOLINGBROOK | NOT RENEWED | Verify |
| POPE & ASSOCIATES LTD | Business | 117001139 | NAPERVILLE | NOT RENEWED | Verify |
| HAPPIE OF USA INC | Business | 117001144 | CHICAGO | NOT RENEWED | Verify |
| SDI CONSULTING GROUP INC | Business | 117001152 | MURPHYSBORO | NOT RENEWED | Verify |
| UNITED SECURITY SERVICE INC | Business | 117001170 | CHICAGO | INOPERATIVE | Verify |
| VINCENT L CALCAGNO | Business | 117001174 | BOLINGBROOK | NOT RENEWED | Verify |
| COUNTYWIDE DETECTIVE BUREAU INC | Business | 117001184 | CHICAGO | ACTIVE | Verify |
| PRIVATE DETECTIVE SERVICES | Business | 117001186 | CHICAGO HEIGHTS | NOT RENEWED | Verify |
| SHIU AND TIEDJE INCORPORATED | Business | 117001203 | WAUKEGAN | CLOSED | Verify |
| H & B DETECTIVE AGENCY INC | Business | 117001204 | DOLTON | NOT RENEWED | Verify |
| CLUTTER INVESTIGATIONS INC | Business | 117001206 | SPRINGFIELD | ACTIVE | Verify |
| NEMESIS INVESTIGATIVE RESEARCH LTD | Business | 117001207 | FRANKFORT | NOT RENEWED | Verify |
| ADVANCED PRIVATE INVESTIGATIONS AND PERSONAL PROTECTION SERVICES | Business | 117001214 | CHICAGO | NOT RENEWED | Verify |
| RICHARDSON & ASSOCIATES PRIVATE DETECTIVE AGENCY INC | Business | 117001215 | LANSING | NOT RENEWED | Verify |
| APIC-A PRIVATE INVESTIGATIONS COMPANY | Business | 117001226 | BELVIDERE | NOT RENEWED | Verify |
| COUNTER-INTELLIGENCE ASSOCIATES INC | Business | 117001249 | PALOS HEIGHTS | ACTIVE | Verify |