| HK SIER CO., LIMITED | Private company limited by shares | Live |
| SIER TRADE CO., LIMITED | Private company limited by shares | Live |
| SIER TOOLS INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| SIER Legal Company Limited | Private company limited by shares | Live |
| SIER SEMI CORPORATION LIMITED | Private company limited by shares | Live |
| SIERA LIMITED | | Live |
| SIERAD INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CHINA.SHANGHAI SIERDAN CLOTHING LIMITED | Private company limited by shares | Dissolved |
| SIERLIGHTING SHARES LIMITED | Private company limited by shares | Live |
| SIERRA JOY LIMITED | Private company limited by shares | Live |
| SIERRA SEA LIMITED | Private company limited by shares | Dissolved |
| SIERRA ART LIMITED | Private company limited by shares | Dissolved |
| SIERRA BAY LIMITED | Private company limited by shares | Dissolved |
| LA SIERRA LIMITED | Private company limited by shares | Dissolved |
| SIERRA LIMITED | Private company limited by shares | Live |
| Sierra Asia Limited | Private company limited by shares | Live |
| SIERRA BASE LIMITED | Private company limited by shares | Dissolved |
| SIERRA CAPITAL LIMITED | Private company limited by shares | Dissolved |
| SIERRA CAPITAL LIMITED | Private company limited by shares | Dissolved |
| Sierra Capital Limited | Private company limited by shares | Live |
| SIERRA CHANCE LIMITED | Private company limited by shares | Dissolved |
| SIERRA CHEMICAL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Sierra Sun Co., Limited | Private company limited by shares | Live |
| SIERRA TIRE CO., LIMITED | Private company limited by shares | Live |
| Sierra Engineering Consultant Company Limited | | Live |
| SIERRA CORPORATION LIMITED | Private company limited by shares | Live |
| SIERRA TECHNOLOGY CORPORATION LIMITED | Private company limited by shares | Live |
| SIERRA UNO CREDIT LIMITED | Private company limited by shares | Dissolved |
| Imperial Sierra Development Holdings Limited | Private company limited by shares | Live |
| SIERRA LEONE DEVELOPMENT HOLDINGS COMPANY LIMITED | Private company limited by shares | Dissolved |
| SIERRA FAR EAST ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| SIERRA ENTERPRISES LIMITED | Private company limited by shares | Live |
| SIERRA EXPORTS LIMITED | Private company limited by shares | Live |
| SIERRA DELTA (FAR EAST) LIMITED | Private company limited by shares | Dissolved |
| Imperial Sierra Finance Company Limited | Private company limited by shares | Live |
| Sierra Global Limited | Private company limited by shares | Live |
| GOLDEN SIERRA LIMITED | Private company limited by shares | Dissolved |
| SIERRA GRATHER LIMITED | Private company limited by shares | Live |
| Sierra Pacific Hardware Manufacturing Limited | Private company limited by shares | Live |
| SIERRA GLOW (HK) LIMITED | Private company limited by shares | Live |
| Imperial Sierra (HK) Holdings Limited | Private company limited by shares | Dissolved |
| SIERRA (HK) CLOTHING & HEADWEAR INDUSTRIAL LIMITED | Private company limited by shares | Live |
| SIERRA NEVADA (H.K.) LIMITED | Private company limited by shares | Dissolved |
| SIERRA HOLDINGS LIMITED | Private company limited by shares | Live |
| Imperial Sierra (China) Holdings Limited | Private company limited by shares | Live |
| Sierra Holdings Foundation Limited | Private company limited by shares | Dissolved |
| Imperial Sierra Property Holdings Limited | Private company limited by shares | Live |
| SIERRA ASIA HONG KONG, LIMITED | Private company limited by shares | Live |
| SIERRA HONG KONG LIMITED | Private company limited by shares | Dissolved |
| LA SIERRA (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Sierra Glow Group (Hong Kong) Limited | Private company limited by shares | Live |
| Sierra Solar Power (Hong Kong) Limited | Private company limited by shares | Live |
| SIERRA HOUSE LIMITED | Private company limited by shares | Dissolved |
| Sierra Industries Limited | Private company limited by shares | Live |
| SIERRA INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SIERRA ENTERPRISE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SIERRA PETROLEUM INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SIERRA INTERNATIONAL TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Sierra Investment Limited | Private company limited by shares | Dissolved |
| SIERRA LIMA 2 LIMITED | Private company limited by shares | Live |
| SIERRA MADRE LIMITED -THE- | Private company limited by shares | Live |
| Sierra Madre Group Limited | Private company limited by shares | Live |
| SIERRA MADRE INVESTMENTS LIMITED | Private company limited by shares | Live |
| SIERRA MAESTRA LIMITED | Private company limited by shares | Live |
| SIERRA MANAGEMENT CO., LIMITED | Private company limited by shares | Live |
| Sierra Manufacturing Limited | Private company limited by shares | Live |
| SIERRA MEDICAL CENTRE LIMITED | | Live |
| SIERRA MIDDLE EAST CORPORATION LIMITED | Private company limited by shares | Dissolved |
| SIERRA MINES LIMITED | Private company limited by shares | Dissolved |
| SIERRA TIME MISSION LIMITED | Private company limited by shares | Live |
| Sierra Nevada Limited | Private company limited by shares | Live |
| SIERRA ORIENT LIMITED | Private company limited by shares | Dissolved |
| SIERRA PACIFIC LIMITED | Private company limited by shares | Dissolved |
| SIERRA PAGODA COMPANY LIMITED | Private company limited by shares | Live |
| SIERRA PLENITUDE LIMITED | Private company limited by shares | Live |
| Sierra Business Private Limited | | Live |
| SIERRA PRODUCTION LIMITED | Private company limited by shares | Live |
| SIERRA PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| SIERRA SALES LIMITED | Private company limited by shares | Dissolved |
| Imperial Sierra Commercial Consultancy Services Company Limited | Private company limited by shares | Live |
| Sierra Services London Limited | Private company limited by shares | Live |
| SIERRA SHINE LIMITED | Private company limited by shares | Live |
| Sierra Soluna Company Limited | Private company limited by shares | Live |
| SIERRA SPORTS HK LIMITED | Private company limited by shares | Dissolved |
| SIERRA STAND LIMITED | Private company limited by shares | Dissolved |
| Sierra Studio Limited | Private company limited by shares | Live |
| SIERRA SUPERIOR ELECTRON LIMITED | Private company limited by shares | Live |
| SIERRA SUPERIOR TECHNOLOGY LIMITED | Private company limited by shares | Live |
| FIRST SIERRA TITLE LIMITED | Private company limited by shares | Dissolved |
| Sierra Trade Limited | Private company limited by shares | Live |
| SIERRA TRADING LIMITED | Private company limited by shares | Dissolved |
| SIERRA SHIPPING AND TRADING LIMITED | Private company limited by shares | Dissolved |
| SIERRA VENTURE CAPITAL LIMITED | Private company limited by shares | Live |
| SIERRA VISTA TRADING LIMITED | Private company limited by shares | Live |
| Sierra Wireless Hong Kong Limited | Private company limited by shares | Live |
| SIERRA WIRELESS (ASIA PACIFIC) LIMITED | Private company limited by shares | Live |
| SIERTE CO., LIMITED | Private company limited by shares | Live |
| HONG KONG SIERWO CO., LIMITED | Private company limited by shares | Live |