| LLP SYNC LIMITED | Private company limited by shares | Live |
| Q Sync Limited | Private company limited by shares | Live |
| DIGITAL SYNC H.K COMPANY LIMITED | Private company limited by shares | Live |
| SYNC INNOVATIONS LIMITED | Private company limited by shares | Live |
| Kitchen Sync Limited | Private company limited by shares | Live |
| SYNC MODE LIMITED | Private company limited by shares | Dissolved |
| SYNC SYSTEM LIMITED | Private company limited by shares | Live |
| Sync-channel Limited | Private company limited by shares | Live |
| SYNCCHIC (HK) LIMITED | Private company limited by shares | Live |
| SYNCCO LIMITED | Private company limited by shares | Dissolved |
| Sync-ed Technology Limited | Private company limited by shares | Live |
| Syncflo International Limited | Private company limited by shares | Live |
| SYNCGROUP COMPANY LIMITED | Private company limited by shares | Live |
| SYNCH LIMITED | Private company limited by shares | Live |
| SYNCHEM LIMITED | Private company limited by shares | Live |
| SYNCHEM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SYNCHEM ENTERPRISES LIMITED | Private company limited by shares | Live |
| SYNCHEMER CO., LIMITED | Private company limited by shares | Live |
| SYNCHEMIE COMPANY LIMITED | Private company limited by shares | Live |
| SynchoTrading Limited | | Live |
| SYNCHRO PRO LIMITED | Private company limited by shares | Live |
| Synchro Consulting Limited | Private company limited by shares | Live |
| SYNCHRO CONSULTING INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Synchro International Education Co. Limited | Private company limited by shares | Live |
| FIRST GLOBAL SYNCHRO EDUCATION LIMITED | Private company limited by shares | Dissolved |
| SYNCHRO OVERSEAS EDUCATION COMPANY LIMITED | Private company limited by shares | Live |
| Synchro Technology Limited | Private company limited by shares | Live |
| Synchrodots Limited | | Live |
| SynchroKnot Limited | | Live |
| SynchroLife, Limited | Private company limited by shares | Live |
| Synchromax Entertainment Company Limited | Private company limited by shares | Live |
| Synchron Limited | Private company limited by shares | Live |
| Tech Synchron Limited | Private company limited by shares | Live |
| SYNCHRONGAIN GLOBAL HOLDING LIMITED | Private company limited by shares | Live |
| SYNCHRONICITY LIMITED | Private company limited by shares | Live |
| Synchronise Trading Limited | Private company limited by shares | Live |
| SYNCHRONIZE CONSULTANTS LIMITED | Private company limited by shares | Live |
| SYNCHRONIZE TRADING ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| Synchronizer Golf Co., Limited | Private company limited by shares | Dissolved |
| SYNCHRONOUS LIMITED | | Live |
| Synchrony Association Limited | | Live |
| Synchub Media Limited | Private company limited by shares | Live |
| SyncIn Limited | Private company limited by shares | Live |
| SYNCINIT COMPANY LIMITED | Private company limited by shares | Live |
| Synclone company Limited | Private company limited by shares | Live |
| SYNCO LIMITED | Private company limited by shares | Live |
| SYNCO GLOBAL LIMITED | Private company limited by shares | Live |
| SYNCO GLOBAL TRADING LIMITED | Private company limited by shares | Live |
| SYNCO GROUP LIMITED | Private company limited by shares | Live |
| SYNCO (H.K.) LIMITED | Private company limited by shares | Live |
| SYNCO INTERNATIONAL (H.K.) CO. LIMITED | Private company limited by shares | Dissolved |
| SYNCO (HK) IMPORT EXPORT CO., LIMITED | Private company limited by shares | Dissolved |
| SYNCO INTERNATIONAL INDUSTRIAL LIMITED | Private company limited by shares | Live |
| SYNCO INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SYNCO INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Synco Marketing Limited | Private company limited by shares | Live |
| SYNCO MOTOR COMPANY LIMITED | Private company limited by shares | Live |
| SYNCO TECH COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYNCO TECHNOLOGY (HONGKONG) LIMITED | Private company limited by shares | Live |
| SYNCOLAS APPAREL CO., LIMITED | Private company limited by shares | Dissolved |
| SYNCOLOUR LIMITED | Private company limited by shares | Live |
| Syncom Limited | Private company limited by shares | Live |
| SYNCOMM TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| SYN-CONCEPTS LIMITED | Private company limited by shares | Live |
| Synconexus Limited | | Live |
| SYNCON-LOTUS INSURANCE AGENTS LIMITED | Private company limited by shares | Live |
| SYNCON-LOTUS (H.K.) LIMITED | Private company limited by shares | Dissolved |
| SYNCOPART (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Syncopate Limited | Private company limited by shares | Live |
| SYNCORD 3D TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SYNCORDIA CONSULTANCY LIMITED | Private company limited by shares | Live |
| SYNCORE HOLDING CO., LIMITED | Private company limited by shares | Live |
| SYNCORE COMMODITIES LIMITED | Private company limited by shares | Live |
| Syncore Energy Technology Limited | Private company limited by shares | Live |
| Syncore International Limited | Private company limited by shares | Live |
| SYNCORP LIMITED | Private company limited by shares | Dissolved |
| SYNCOTEX LIMITED | Private company limited by shares | Dissolved |
| SYNCOW COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYNCPART INDSTRIAL CO., LIMITED | Private company limited by shares | Live |
| SYNCPLUS LIMITED | Private company limited by shares | Live |
| SyncPro Group Limited | | Live |
| SYNCQUICK LIMITED | Private company limited by shares | Live |
| SYNCRETIC LIMITED | Private company limited by shares | Live |
| SYNCRETIC INTERNATIONAL (HK) LANDSCAPE PLANNING & DESIGN CO., LIMITED | Private company limited by shares | Dissolved |
| Syncretic Leader's College Limited | Private company limited by shares | Live |
| Isen Syncretic Company Limited | | Live |
| SYNCRETIC SEMITECH LIMITED | Private company limited by shares | Live |
| Syncretica Limited | Private company limited by shares | Live |
| Syncretism College Co., Limited | Private company limited by shares | Live |
| Z&H Syncretism Information Consulting Limited | Private company limited by shares | Live |
| Syncrify Limited | Private company limited by shares | Live |
| SYNCRO ASIA CO., LIMITED | Private company limited by shares | Live |
| SYNCRO PLASTICS MACHINERY CO., LIMITED | Private company limited by shares | Live |
| Syncro Software Limited | Private company limited by shares | Live |
| SYNCROCHAIN LIMITED | Private company limited by shares | Live |
| SYNCSIGN LIMITED | Private company limited by shares | Live |
| SYNCSOFT LIMITED | Private company limited by shares | Live |
| Sync-Supply Technology Limited | | Live |
| SYNCTA LIMITED | Private company limited by shares | Dissolved |
| WIN SYNC-TECH COMPANY LIMITED | Private company limited by shares | Dissolved |