| STAR SEIKI (HONGKONG) COMPANY LIMITED | Private company limited by shares | Live |
| SAKURA SEIKI INDUSTRIAL CO., LIMITED | Private company limited by shares | Dissolved |
| HONG KONG SEIKI PRECISION INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| SEIKI INTERNATIONAL LIMITED | Private company limited by shares | Live |
| HI-TECH SEIKI INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| DAIWA SEIKI INTERNATIONAL INDUSTRY GROUP LIMITED | Private company limited by shares | Live |
| SEIKI JEWELLERY (INTERNATIONAL) LIMITED | Private company limited by shares | Live |
| NOMURA SEIKI (INTERNATIONAL) LIMITED | Private company limited by shares | Live |
| SEIKI INVESTMENT LIMITED | Private company limited by shares | Live |
| JAPAN IVAGAKI SEIKI CO., LIMITED | Private company limited by shares | Live |
| Kasuga Seiki Limited | Private company limited by shares | Live |
| MITSUI SEIKI KOGYO CO., LIMITED | Private company limited by shares | Live |
| HONG KONG KORIYAMA SEIKI LIMITED | Private company limited by shares | Live |
| SEIKI LIGHTING LIMITED | Private company limited by shares | Live |
| KEODO SEIKI MACHINE TOOL LIMITED | | Live |
| MAENISHI SEIKI LIMITED | | Live |
| MITSUYO SEIKI CO LIMITED | Private company limited by shares | Live |
| MITSUYO SEIKI (H.K.) CO., LIMITED | Private company limited by shares | Live |
| NAKAMURA SEIKI COMPANY LIMITED | Private company limited by shares | Live |
| OSAKA SEIKI COMPANY LIMITED | Private company limited by shares | Dissolved |
| SUNWAY SEIKI TRADING CO., LIMITED | Private company limited by shares | Live |
| SUNWAY SEIKI INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| Seiki System Furniture Limited | Private company limited by shares | Live |
| TAIAN SEIKI COMPANY LIMITED | Private company limited by shares | Live |
| Taichung Seiki Co., Limited | Private company limited by shares | Live |
| TAIWAN FUTE SEIKI SHARE LIMITED | Private company limited by shares | Live |
| TAIWAN FUTE SEIKI SHARE LIMITED | Private company limited by shares | Live |
| HI-TECH SEIKI TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| TOKAI SEIKI COMPANY (H.K.) LIMITED | Private company limited by shares | Live |
| Toustar Seiki Co., Limited | Private company limited by shares | Live |
| SEIKI TRANSPORTATION LIMITED | Private company limited by shares | Live |
| SEIKO COMPANY LIMITED | Private company limited by shares | Live |
| JVS SEIKO LIMITED | Private company limited by shares | Live |
| VSU SEIKO LIMITED | Private company limited by shares | Live |
| JM SEIKO LIMITED | | Live |
| AOBA SEIKO CO. LIMITED | Private company limited by shares | Live |
| SEIKO CENTRE LIMITED | Private company limited by shares | Dissolved |
| SUNRISE SEIKO COMPANY LIMITED | | Live |
| TINON SEIKO COMPANY LIMITED | Private company limited by shares | Live |
| WELL-TRANS SEIKO COMPANY LIMITED | Private company limited by shares | Dissolved |
| SEIKOHOME COMPANY LIMITED | Private company limited by shares | Live |
| SEIKOM TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| SEIKOM METAL WORKS LIMITED | Private company limited by shares | Dissolved |
| SEIKON LIMITED | Private company limited by shares | Dissolved |
| Seikonveyor Co., Limited | Private company limited by shares | Live |
| SEIKOO TRADING CO., LIMITED | | Live |
| CHINA SEIKOPACKING CO., LIMITED | Private company limited by shares | Live |
| SEIKO-SIGYO INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SEIKOTECH COMPANY LIMITED | Private company limited by shares | Dissolved |
| DAIWA SEIKOU COMPANY LIMITED | Private company limited by shares | Dissolved |
| SEIKOU INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| SeiKou Precision Machinery Limited | Private company limited by shares | Live |
| SEIKOU SHOJI COMPANY LIMITED | Private company limited by shares | Dissolved |
| KAWASAKI SEIKOUKI CO. LIMITED | Private company limited by shares | Live |
| SEIKO-VIP LIMITED | Private company limited by shares | Live |
| SeikoYamaha Power Industry & Trade Co., Limited | Private company limited by shares | Live |
| SEIL LIMITED | | Live |
| HONG KONG SEILAN TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| SEILL COMPANY LIMITED | Private company limited by shares | Live |
| SEILLER LIMITED | Private company limited by shares | Live |
| SEILOP LIMITED | Private company limited by shares | Dissolved |
| Seilov Co. Limited | | Live |
| SEIMEI HK LIMITED | Private company limited by shares | Live |
| Seimens ELECTRIC (HONG KONG) LIMITED | | Live |
| NSD SEIMITSU COMPANY LIMITED | Private company limited by shares | Live |
| SHINTEC SEIMITSU LIMITED | Private company limited by shares | Dissolved |
| FUNKIN SEIMITU CO., LIMITED | | Live |
| TIKUSIN SEIMITU COMPANY LIMITED | Private company limited by shares | Live |
| SEIMLONG TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| SEIMORA INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| HK SEIMOU TECHNOLOGY (ASIA) LIMITED | Private company limited by shares | Dissolved |
| SUN SEIN KUNG LIMITED | Private company limited by shares | Dissolved |
| Manzel & Seinberg Limited | | Live |
| SEINBO CO., LIMITED | Private company limited by shares | Live |
| SEINE HK COMPANY LIMITED | Private company limited by shares | Dissolved |
| LA SEINE LIMITED | Private company limited by shares | Live |
| SEINE LIMITED | Private company limited by shares | Live |
| SEINE CHINA TRADE COMPANY LIMITED | Private company limited by shares | Dissolved |
| SEINE ESTATES COMPANY LIMITED | Private company limited by shares | Live |
| SEINE EXPORT CO. LIMITED | Private company limited by shares | Dissolved |
| GOLD SEINE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SEINE GROUP LIMITED | Private company limited by shares | Dissolved |
| LA SEINE INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| Seine Investment Limited | Private company limited by shares | Live |
| Grand Seine Shipping Limited | Private company limited by shares | Live |
| Seine Trading Limited | Private company limited by shares | Live |
| SEINESON INVESTMENTS COMPANY LIMITED | Private company limited by shares | Live |
| SEINEX LIMITED | Private company limited by shares | Dissolved |
| SEINFEL COMPANY LIMITED | Private company limited by shares | Live Commenced dormancy on 14-Aug-2006 |
| SEINOH OPTICAL (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| SEINOR Trading Limited | Private company limited by shares | Live |
| Seintai Industrial Company Limited | Private company limited by shares | Live |
| SEINVA INVESTMENT CO., LIMITED | Private company limited by shares | Live |
| SEIOU (HK) TRADING CO., LIMITED | Private company limited by shares | Dissolved |
| SEIP United Limited | | Live |
| SEIPLE LIMITED | Private company limited by shares | Dissolved |
| SEIPON LIMITED | Private company limited by shares | Dissolved |
| SEIR & CHELL INTERNATIONAL CLOTHING CO., LIMITED | Private company limited by shares | Live |
| SEIRUDA TRADING AND KNITTING CO., LIMITED | Private company limited by shares | Dissolved |
| Seiryu (Hong Kong) Investment Company Limited | Private company limited by shares | Live |