| HIGHTACT SECURITY LIMITED | Private company limited by shares | Dissolved |
| HITECH SECURITY LIMITED | Private company limited by shares | Live |
| Shenzhen Wolf-Guard Security Hi-tech Co., Limited | Private company limited by shares | Live |
| Yatu Hi-Tech Security Company Limited | Private company limited by shares | Live |
| HOLLAND SECURITY SYSTEMS LIMITED | Private company limited by shares | Live |
| Honeywell Security (Hong Kong) Limited | Private company limited by shares | Live Ceased dormancy on 03-Jun-1999 |
| SECURITY CARD (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Cloud Security (Hong Kong) Limited | Private company limited by shares | Live |
| Cyber Security (Hong Kong) Limited | Private company limited by shares | Live |
| WK Security (Hong Kong) Limited | Private company limited by shares | Live |
| ASM Security Hong Kong Co Limited | Private company limited by shares | Live |
| D TEG SECURITY (HONG KONG) LIMITED | Private company limited by shares | Live |
| TTS Security Hong Kong Limited | Private company limited by shares | Live |
| Security (Hong Kong) Limited | Private company limited by shares | Live |
| Oyster Security (Hong Kong) Limited | Private company limited by shares | Live |
| HONWAY SECURITY LIMITED | Private company limited by shares | Live |
| HYPERION SECURITY LIMITED | Private company limited by shares | Live |
| IDENTOGRAPH SECURITY SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| I.L.C. SECURITY INVESTMENTS LIMITED | Private company limited by shares | Live |
| IMMUNEEDGE SECURITY LIMITED | Private company limited by shares | Dissolved |
| IMPERIAL SECURITY LIMITED | Private company limited by shares | Dissolved |
| INDIAN SECURITY SERVICE CO. LIMITED | Private company limited by shares | Live |
| HSY SECURITY INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| DRAGON SECURITY INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| JOY SECURITY (HONG KONG) INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| SECURITY POWER INDUSTRIAL LIMITED | Private company limited by shares | Live |
| SAFELOCK SECURITY INDUSTRIAL LIMITED | Private company limited by shares | Live |
| SECURITY INDUSTRY LIMITED | Private company limited by shares | Live |
| INNOV SECURITY LIMITED | Private company limited by shares | Dissolved |
| INSTANT SECURITY (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Road Security Insurance Limited | | Live |
| INTEGRATED SECURITY SOLUTIONS LIMITED | Private company limited by shares | Live |
| STRUCTURAL SECURITY & INTEGRATED TRANSPORT LIMITED | Private company limited by shares | Dissolved |
| INTELLIGENT SECURITY SOLUTIONS LIMITED | Private company limited by shares | Live |
| Intelligent Security Solutions (Mongolia) Limited | Private company limited by shares | Live |
| Security Intelligent Systems Limited | Private company limited by shares | Live |
| XENA Intelligent Security Limited | Private company limited by shares | Live |
| INTER SECURITY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| INTERNAL SECURITY LIMITED | Private company limited by shares | Dissolved |
| 100 Internet Security Limited | Private company limited by shares | Live |
| DOMINION INVESTIGATION AND SECURITY SERVICE LIMITED | Private company limited by shares | Dissolved |
| SECURITY INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Key Security Investment Limited | Private company limited by shares | Live |
| Dart Security Investment Limited | Private company limited by shares | Live |
| INWELLS SECURITY SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| iRetail Security Technology Co. Limited | Private company limited by shares | Live |
| ISAT SECURITY ALARM & TELECOMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| I-SOON Digital Security Company Limited | | Live |
| ITSec Security Consulting Limited | | Live |
| JACKSON SECURITY SYSTEMS COMPANY LIMITED | Private company limited by shares | Live |
| JANTEC SECURITY SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| HK JINRUI SECURITY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| JKDC SECURITY CO LIMITED | Private company limited by shares | Live |
| SHENZHEN JOTECH SECURITY CO., LIMITED | Private company limited by shares | Dissolved |
| KABOARD SECURITY LIMITED | Private company limited by shares | Dissolved |
| KAPRO SECURITY SYSTEM LIMITED | Private company limited by shares | Live |
| KAVASS SECURITY TECH LIMITED | Private company limited by shares | Live |
| HK KEKAXI SECURITY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| KINGTING SECURITY AUTOMATION LIMITED | Private company limited by shares | Live |
| KONE SECURITY COMPANY LIMITED | Private company limited by shares | Live |
| CENTIGON SECURITY HONG KONG LIMITED | Private company limited by shares | Live |
| APAC SECURITY (HONG KONG) LIMITED | Private company limited by shares | Live |
| BELL SECURITY (HONG KONG) LIMITED | Private company limited by shares | Live |
| DEIMOS SECURITY HONG KONG LIMITED | Private company limited by shares | Live |
| Tenable Network Security Hong Kong Limited | Private company limited by shares | Live |
| YALE SECURITY PRODUCTS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| G4S Security Systems (Hong Kong) Limited | Private company limited by shares | Live |
| BIOCOME SECURITY TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Live |
| SECURITY TICKETING HONG KONG LIMITED | Private company limited by shares | Live |
| Korea An Nai Security Technology Limited | Private company limited by shares | Live |
| KUOKON SECURITY LIMITED | Private company limited by shares | Live |
| EASTERN SECURITY LABELS LIMITED | Private company limited by shares | Dissolved |
| Laputa Security Technology Limited | | Live |
| SKY LEOPARD SECURITY LIMITED | Private company limited by shares | Live |
| SECURITY LEVERAGE SYSTEMS, LIMITED | Private company limited by shares | Dissolved |
| LICHEN SECURITY CO., LIMITED | Private company limited by shares | Live |
| SECURITY LIFE ASSURANCE COMPANY LIMITED | Private company limited by shares | Dissolved |
| Loyalty Security Service Limited | Private company limited by shares | Live |
| CMF SECURITY (MACAU) LIMITED | Private company limited by shares | Dissolved |
| MALDUN SECURITY LIMITED | Private company limited by shares | Live |
| Z MANAGEMENT AND SECURITY LIMITED | Private company limited by shares | Dissolved |
| HOK MAN SECURITY & MANAGEMENT LIMITED | Private company limited by shares | Live |
| ON WAH SECURITY MANAGEMENT COMPANY LIMITED | Private company limited by shares | Live |
| A-BOND SECURITY & MANAGEMENT COMPANY LIMITED | Private company limited by shares | Live |
| Security Management Resources Asia Limited | Private company limited by shares | Live |
| SECURITY ASSETS MANAGEMENT LIMITED | Private company limited by shares | Live |
| Security Of Supply Chain Management Co., Limited -The- | Private company limited by shares | Live |
| LEADER DATA SECURITY AND MANAGEMENT COMPANY LIMITED | Private company limited by shares | Live |
| DEKA Security and Management Limited | Private company limited by shares | Live |
| Easy Security Management Limited | Private company limited by shares | Live |
| G4One Security & Management Limited | Private company limited by shares | Live |
| GALORE SECURITY MANAGEMENT LIMITED | Private company limited by shares | Live |
| HANG SENG SECURITY MANAGEMENT LIMITED | Private company limited by shares | Live |
| JOYFUL MANAGEMENT & SECURITY CO. LIMITED | Private company limited by shares | Live |
| S.P.Property Management & Security Company Limited | Private company limited by shares | Live |
| TIGA SECURITY MANAGEMENT COMPANY LIMITED | Private company limited by shares | Live |
| Mandata Security Limited | Private company limited by shares | Live |
| MG3 Security & Manpower Limited | Private company limited by shares | Live |
| MANTON SECURITY LIMITED | Private company limited by shares | Live |
| Kloongs Security Seals Manufacturing Company Limited | Private company limited by shares | Live |