| C.I.S. ADAPT LIMITED | Private company limited by shares | Dissolved |
| Aero Jet C.I.S. SPV, Limited | Private company limited by shares | Dissolved |
| C.I.S. & CO., LIMITED | Private company limited by shares | Live |
| C.I.S. Education Limited | Private company limited by shares | Live |
| Great Property (C.I.S.) Company Limited | | Live |
| C.I.S. INTERNATIONAL IMPEX COMPANY LIMITED | Private company limited by shares | Live |
| C.I.S INTERNATIONAL TRADING CO., LIMITED | Private company limited by shares | Live |
| ISLAND PROPERTY (C.I.S.) LIMITED | Private company limited by shares | Live |
| KINGSWAY C.I.S. (KLN) PROPERTIES LIMITED | Private company limited by shares | Live |
| KINGSWAY C.I.S. PROPERTIES LIMITED | Private company limited by shares | Live |
| CHARMING PROPERTY (C.I.S.) LIMITED | Private company limited by shares | Live |
| FLOURISH PROPERTY AGENCY (C.I.S.) LIMITED | Private company limited by shares | Live |
| MILLION SKY PROPERTY AGENCY (C.I.S.) LIMITED | Private company limited by shares | Live |
| Tak Ko Realty (C.I.S.) Limited | Private company limited by shares | Dissolved |
| C.I.S. SECRETARY COMPANY LIMITED | Private company limited by shares | Dissolved |
| C.I.S. Tour Limited | Private company limited by shares | Live |
| HK AGENT TRANSPORT CIS, LIMITED | Private company limited by shares | Live |
| CIS2I LIMITED | Private company limited by shares | Live |
| CISA LIMITED | Private company limited by shares | Live |
| CISA DEVELOPMENTS LIMITED | Private company limited by shares | Dissolved |
| Cisaga Electronic HK Limited | | Live |
| CISAL (ASIA) LIMITED | Private company limited by shares | Dissolved |
| CISAM TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Cisam Technology Development Co., Limited | Private company limited by shares | Live |
| CISAM ELECTRONIC TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| CISANG COMPANY LIMITED | Private company limited by shares | Dissolved |
| CISARE COMPANY LIMITED | Private company limited by shares | Live |
| CISARI INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CISATLANTIC COMPANY LIMITED | Private company limited by shares | Dissolved |
| CISATRON LIMITED | Private company limited by shares | Dissolved |
| Cisbio Asia Pacific, Limited | Private company limited by shares | Live |
| CISC LIMITED | Private company limited by shares | Live |
| Ciscero Limited | Private company limited by shares | Dissolved |
| CISCO-LINKSYS (HK) LIMITED | Private company limited by shares | Dissolved |
| CISCORP LIMITED | Private company limited by shares | Live |
| CISD (ASIA) CO., LIMITED | Private company limited by shares | Live |
| CISE LIMITED | Private company limited by shares | Dissolved |
| CISE ELECTRONIC CO., LIMITED | Private company limited by shares | Live |
| RONG CISE (FRANCE) COSMETICS CO., LIMITED | Private company limited by shares | Live |
| CISEA LIMITED | Private company limited by shares | Live |
| HONGKONG CISENDA TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Ciserv China Limited | Private company limited by shares | Dissolved |
| CISGATE LIMITED | Private company limited by shares | Live |
| CISH LIMITED | Private company limited by shares | Live |
| CISH CO. LIMITED | | Live |
| HONGKONG CISHANG INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| GUANGDONG FOSHAN CISHANG PASSWORD CERAMICS LIMITED | Private company limited by shares | Live |
| HK KL CISHANHUI LIMITED | Private company limited by shares | Live |
| CISION COMPANY LIMITED | Private company limited by shares | Dissolved |
| CISIRUN TRADING CO., LIMITED | Private company limited by shares | Live |
| Cisive Hong Kong, Limited | Private company limited by shares | Live |
| CISLEY FURNITURE CO., LIMITED | Private company limited by shares | Live |
| CISLO ENTERPRISES LIMITED | Private company limited by shares | Live |
| CISM LIMITED | Private company limited by shares | Live |
| CISM CAPITAL LIMITED | | Live |
| CISM Asset Management Limited | Private company limited by shares | Live |
| CISM Sustainability Limited | Private company limited by shares | Live |
| CISMON ASSETS INC. LIMITED | Private company limited by shares | Live |
| CISO LIMITED | Private company limited by shares | Dissolved |
| CISON HONGKONG CO., LIMITED | Private company limited by shares | Live |
| CISON INTERNATIONAL GROUP (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| CISON TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| CISOO (UK) INT'L COMMERCE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Cisplatin Limited | | Live |
| CISS LIMITED | Private company limited by shares | Dissolved |
| CISSA LIMITED | | Live |
| CISSEN (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Cissiod Holding HK Limited | Private company limited by shares | Live |
| CISSKA INTERNATIONAL CORPORATION LIMITED | Private company limited by shares | Live |
| CISSLONG CORPORATION LIMITED | Private company limited by shares | Live |
| CISSY COMPANY, LIMITED | Private company limited by shares | Dissolved |
| CISSY BEAUTY CO., LIMITED | Private company limited by shares | Live |
| CISSY JEWELRY & WATCH COMPANY, LIMITED | Private company limited by shares | Dissolved |
| CISTec Limited | Private company limited by shares | Live |
| CISTECH LIMITED | Private company limited by shares | Live |
| Cistera Limited | Private company limited by shares | Live |
| CISTERN INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| CISTO INC LIMITED | Private company limited by shares | Live |
| CISTOR HK LIMITED | Private company limited by shares | Live |
| CISTOV INVESTMENT LIMITED | Private company limited by shares | Live |
| CISTRON ELECTRONICS (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| CISTRON Therapeutics HK Limited | | Live |
| CISTUS LIMITED | Private company limited by shares | Dissolved |
| CISV (CHINA) LIMITED | Company limited by guarantee | Live |
| CISVA TECH LIMITED | Private company limited by shares | Live |
| CISVEY LIMITED | Private company limited by shares | Dissolved |
| CiSystem Solutions Company Limited | Private company limited by shares | Live |