| M.L.M SECURITY LIMITED | Private company limited by shares | Dissolved |
| ASIA MODERN SECURITY LIMITED | Private company limited by shares | Live |
| Shield Security Monitoring Limited | Private company limited by shares | Dissolved |
| FIRST SECURITY MORTGAGE COMPANY LIMITED | Private company limited by shares | Dissolved |
| M-Phoenix Security Limited | | Live |
| SECURITY MUTUAL LIMITED | Private company limited by shares | Dissolved |
| nCipher Security (Hong Kong) Limited | Private company limited by shares | Live |
| NEGACO SECURITY LIMITED | Private company limited by shares | Live |
| Neptune Cyber Security Limited | Private company limited by shares | Live |
| SECURITY & NETWORK SERVICE LIMITED | Private company limited by shares | Live |
| NETWORK SECURITY SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| Network Security Solutions Limited | Private company limited by shares | Live |
| NEWERTON SECURITY LIMITED | Private company limited by shares | Live |
| New-vision Security Co., Limited | Private company limited by shares | Live |
| Next Security Limited | | Live |
| NovoTech Security Systems Company Limited | Private company limited by shares | Dissolved |
| Numen Security Limited | Private company limited by shares | Live |
| Omas Security Limited | Private company limited by shares | Live |
| ONWARD SECURITY COMPANY LIMITED | Private company limited by shares | Live |
| ORIENT SECURITY SYSTEM LIMITED | Private company limited by shares | Live |
| ORIENTAL SECURITY COMPANY LIMITED | Private company limited by shares | Live |
| Ouroboros Security Limited | Private company limited by shares | Live |
| OYESEE SECURITY LIMITED | Private company limited by shares | Live |
| Pacific HRA Security Limited | Private company limited by shares | Live |
| ASIA PACIFIC SECURITY SYSTEMS LIMITED | Private company limited by shares | Live Commenced dormancy on 18-Aug-2010 |
| Packetfilters Network Security Limited | Private company limited by shares | Live |
| PARADIGM SECURITY LIMITED | Private company limited by shares | Live |
| Paramount Security Limited | Private company limited by shares | Live |
| Paranoiak Security Limited | Private company limited by shares | Live |
| KEM PARKING SECURITY LIMITED | Private company limited by shares | Live |
| SECURITY PATROLS LIMITED | Private company limited by shares | Dissolved |
| PCCW Security Solutions Limited | Private company limited by shares | Live Ceased dormancy on 31-May-1999 |
| PEACE SECURITY CO., LIMITED | Private company limited by shares | Live |
| SHENZHEN PEACE SECURITY CO., LIMITED | Private company limited by shares | Live |
| PEGASUS SECURITY SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| PENTASTIC SECURITY LIMITED | Private company limited by shares | Live |
| PERFECTION SECURITY COMPANY LIMITED | Private company limited by shares | Live |
| Perun Security Limited | Private company limited by shares | Live |
| Excellence Security Planning Limited | Private company limited by shares | Live |
| POLARIS SECURITY LIMITED | Private company limited by shares | Live |
| DOG POWER SECURITY LIMITED | Private company limited by shares | Dissolved |
| PREMIER SECURITY COMPANY LIMITED | Private company limited by shares | Live |
| PREMIER TECHNOLOGY SECURITY LIMITED | Private company limited by shares | Live |
| Prestige Security Limited | Private company limited by shares | Live |
| PRESTIGE SECURITY SERVICE LIMITED | | Live |
| C & C SECURITY PRINTING COMPANY LIMITED | Private company limited by shares | Live |
| SECURITY PRINTING LIMITED | Private company limited by shares | Live |
| CHINA SECURITY PRINTING LIMITED | Private company limited by shares | Live |
| FORMERS SECURITY PRINTING LIMITED | Private company limited by shares | Live |
| SECURITY PRINTING AND TYPESETTING LIMITED | Private company limited by shares | Dissolved |
| HK Security Products Limited | Private company limited by shares | Dissolved |
| ASIA SECURITY PRODUCTS LIMITED | Private company limited by shares | Live |
| SECURITY PRODUCTS HONG KONG LIMITED | Private company limited by shares | Dissolved |
| HOPESAIL SECURITY PRODUCTS LIMITED | Private company limited by shares | Live |
| KAMBO SECURITY PRODUCTS LIMITED | Private company limited by shares | Live |
| MENTOR SECURITY PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| NESS SECURITY PRODUCTS (ASIA) LIMITED | Private company limited by shares | Live |
| ASIA PUBLIC SECURITY PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| SECURITY AND SURVEILLANCE PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| SECURITY PRODUCTS UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| WUJIANG SECURITY PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| LOX Data Protection & Security Limited | Private company limited by shares | Live |
| Asia Security and Protection Group Limited | Private company limited by shares | Live |
| Protection Star Security Limited | Private company limited by shares | Live |
| Security Protocol Company Limited -The- | Private company limited by shares | Live |
| PULSE SECURITY LIMITED | Private company limited by shares | Live |
| QUALITY SECURITY LIMITED | Private company limited by shares | Live |
| Quality Security System Limited | Private company limited by shares | Live |
| Quest Security Limited | Private company limited by shares | Live |
| HKS RACING SECURITY LIMITED | Private company limited by shares | Dissolved |
| RAYOO SECURITY LIMITED | Private company limited by shares | Live |
| RELIANCE SECURITY LIMITED | Private company limited by shares | Live |
| REUNION SECURITY LIMITED | Private company limited by shares | Live |
| RICH & WISDOM SECURITY LIMITED | Private company limited by shares | Dissolved |
| River Security Hong Kong Co., Limited | | Live |
| ROBERTO SECURITY HK LIMITED | Private company limited by shares | Live |
| Synerion Rosslare Security Limited | | Live |
| r-pac Security Company Limited | Private company limited by shares | Live |
| Safe Security Limited | Private company limited by shares | Live |
| One Safe Security Company Limited | | Live |
| PUBLIC SAFE SECURITY COMPANY LIMITED | Private company limited by shares | Live |
| SOUTHERN SAFE SECURITY SYSTEM ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| SAFEGUARD SECURITY LIMITED | Private company limited by shares | Dissolved |
| SAFEGUARD SECURITY COMPANY LIMITED | Private company limited by shares | Live |
| SAFELY SECURITY SERVICE LIMITED | Private company limited by shares | Live |
| 3S SAFETY SECURITY SYSTEM LIMITED | Private company limited by shares | Live |
| Safeway security Service Limited | Private company limited by shares | Live |
| HK SAITEKM SECURITY ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| SANYO SECURITY LIMITED | Private company limited by shares | Live |
| SAYOTECH SECURITY LIMITED | Private company limited by shares | Live |
| HK SECURITY SEALS LIMITED | Private company limited by shares | Live |
| AE SECURITY SEALS LIMITED | Private company limited by shares | Live |
| SECURITY SECRETARIES LIMITED | Private company limited by shares | Dissolved |
| SEA MAN SECURITY SERVICE COMPANY LIMITED | Private company limited by shares | Live |
| Security Service Limited | Private company limited by shares | Live |
| DRAGON ONE SECURITY SERVICE LIMITED | Private company limited by shares | Live |
| Giffen Security Service Company Limited | Private company limited by shares | Live |
| MANIFEST SECURITY SERVICE LIMITED | Private company limited by shares | Live |
| PRO-SHIELD SECURITY SERVICE COMPANY LIMITED | Private company limited by shares | Live |
| Standard Security Service Limited | Private company limited by shares | Dissolved |