| SHATTUC SYSTEMS | Business | 117000464 | SHATTUC | CANCELLED | Verify |
| SORENSEN INVESTIGATIVE AGCY INC | Business | 117000473 | WASHINGTON | NOT RENEWED | Verify |
| LASKER INVESTIGATIONS | Business | 117000475 | CHICAGO | NOT RENEWED | Verify |
| J K GUARDIAN SECURITY SERVICES INC | Business | 117000479 | BLUE ISLAND | ACTIVE | Verify |
| SECURATEX LTD | Business | 117000489 | OAKBROOK TERRACE | CANCELLED | Verify |
| MASON INVESTIGATIVE AND SEC CONSULTANTS | Business | 117000490 | LAKE VILLA | INOPERATIVE | Verify |
| ORION SECURITY & INVESTIGATIVE SERVS INC | Business | 117000491 | CHICAGO | NOT RENEWED | Verify |
| SPENCERS DETECTIVE AGENCY INC | Business | 117000505 | SHERMAN | NOT RENEWED | Verify |
| METROPOLITAN DETECTIVE AGENCY | Business | 117000508 | CHICAGO | INOPERATIVE | Verify |
| COMBINED INVESTIGATIVE SERVICES INC | Business | 117000512 | WHEATON | NOT RENEWED | Verify |
| CENTRAL STATES INVESTIGATIONS | Business | 117000528 | SPRINGFIELD | NOT RENEWED | Verify |
| USA DETECTIVE AGENCY | Business | 117000554 | CHICAGO | INOPERATIVE | Verify |
| THREE STAR DETECTIVE | Business | 117000557 | CHICAGO | NOT RENEWED | Verify |
| GERALD GOLD & ASSOCIATES LTD | Business | 117000560 | SCHAUMBURG | NOT RENEWED | Verify |
| CONTINENTAL SECURITY SERVICES, LTD | Business | 117000566 | MUNDELEIN | NOT RENEWED | Verify |
| ROCKFORD DETECTIVE AGENCY INC | Business | 117000573 | LOVES PARK | CANCELLED | Verify |
| EL-KO INVESTIGATIONS | Business | 117000598 | CHICAGO | NOT RENEWED | Verify |
| INVESTIGATIVE SERVICES BUREAU INC | Business | 117000610 | ORLAND PARK | NOT RENEWED | Verify |
| LEGAL PROCESS SERVICE INC | Business | 117000613 | ELGIN | CLOSED | Verify |
| DEVELOPMENTAL RESEARCH CONSULTANTS INC | Business | 117000624 | PEORIA | NOT RENEWED | Verify |
| NATIONAL CENTRAL SPECIAL SERVICES INC | Business | 117000626 | NAPERVILLE | NOT RENEWED | Verify |
| ARROW SECURITY SERVICES INC | Business | 117000627 | HOMEWOOD | NOT RENEWED | Verify |
| A PRIVATE INVESTIGATOR INC | Business | 117000634 | JOLIET | INACTIVE | Verify |
| GLOBAL PROTECTION ASSOCIATES INC | Business | 117000636 | CHICAGO | NOT RENEWED | Verify |
| INFOTRACK INFORMATION SERVICES INC | Business | 117000645 | DEERFIELD | NOT RENEWED | Verify |
| GREGG INVESTIGATIONS | Business | 117000654 | ROSCOE | NOT RENEWED | Verify |
| HEARTLAND INVESTIGATIONS INC | Business | 117000672 | MURPHYSBORO | CLOSED | Verify |
| UNITED SECURITY AGENTS INC | Business | 117000696 | DARIEN | NOT RENEWED | Verify |
| IMPERIAL INVESTIGATIONS INC | Business | 117000698 | CHICAGO | NOT RENEWED | Verify |
| D-TECT INVESTIGATIONS | Business | 117000701 | CHICAGO | NOT RENEWED | Verify |
| WORLDWIDE SECURITY SERVICES LTD | Business | 117000705 | HINSDALE | NOT RENEWED | Verify |
| HAMILTON SECURITY & INVESTIGATIONS INC | Business | 117000724 | O FALLON | NOT RENEWED | Verify |
| TRA SERVICES INC | Business | 117000736 | CHICAGO | NOT RENEWED | Verify |
| THE GUARDIAN FORCE | Business | 117000737 | CHICAGO | NOT RENEWED | Verify |
| ON-LINE INVESTIGATIONS INC | Business | 117000749 | LIBERTYVILLE | NOT RENEWED | Verify |
| INVESTIGATIONS INTERNATIONAL | Business | 117000750 | BEACH PARK | CLOSED | Verify |
| EL-KO INVESTIGATIONS | Business | 117000753 | CHICAGO | NOT RENEWED | Verify |
| PITTENGER INVESTIGATIONS LLC | Business | 117000758 | DECATUR | NOT RENEWED | Verify |
| CUSHING PROTECTIVE SERVICES | Business | 117000767 | DECATUR | NOT RENEWED | Verify |
| SEARCHERS INVESTIGATING COMPANY INC | Business | 117000787 | CHICAGO | NOT RENEWED | Verify |
| EDWARD R LEFEVOUR AND ASSOCIATES | Business | 117000792 | CHICAGO | NOT RENEWED | Verify |
| B & J SECURITY & INVESTIGATIVE SERVS INC | Business | 117000804 | CHICAGO | NOT RENEWED | Verify |
| UNITED SECURITY SERVICES INC | Business | 117000814 | CHICAGO | NOT RENEWED | Verify |
| COMMERCIAL SECURITY SERVICES INC | Business | 117000818 | CHICAGO RIDGE | INOPERATIVE | Verify |
| ORION MANAGEMENT INTERNATIONAL LTD | Business | 117000834 | FLOSSMOOR | NOT RENEWED | Verify |
| P & L MANAGEMENT SERVICES INC | Business | 117000842 | CHICAGO | NOT RENEWED | Verify |
| TOWER INVESTIGATIONS | Business | 117000845 | CHICAGO | NOT RENEWED | Verify |
| WALTER S CHAMBERS LTD | Business | 117000846 | LIBERTYVILLE | NOT RENEWED | Verify |
| QUEST CONSULTANTS INTL LTD | Business | 117000854 | OAK BROOK | ACTIVE | Verify |
| QUEST INVESTIGATIONS | Business | 117000855 | BOLINGBROOK | NOT RENEWED | Verify |