| SINC TRADE LIMITED | Private company limited by shares | Dissolved |
| SINC TRADE LIMITED | Private company limited by shares | Live |
| SINCA LIMITED | Private company limited by shares | Dissolved |
| SINCA LIMITED | Private company limited by shares | Dissolved |
| SINCAN LIMITED | Private company limited by shares | Dissolved |
| HK SINCANO TECHNOLOGY HOLDING CO., LIMITED | Private company limited by shares | Dissolved |
| ITALY SINCARO GARMENT GROUP LIMITED | Private company limited by shares | Dissolved |
| SINCDH (HK) INTERNATIONAL ENTERPRISE GROUP INVESTMENT HOLDING CO., LIMITED | Private company limited by shares | Live |
| SINCE JOB LIMITED | Private company limited by shares | Dissolved |
| SINCE LIMITED | Private company limited by shares | Live |
| TOP SINCE LIMITED | Private company limited by shares | Dissolved |
| SINCE RAY LIMITED | Private company limited by shares | Live |
| SINCE TEK LIMITED | Private company limited by shares | Live |
| SINCE DAY ONE LIMITED | Private company limited by shares | Live |
| Since Now Company Limited | Private company limited by shares | Live |
| SINCE 1967 LIMITED | Private company limited by shares | Live |
| CHRISTY & CO. SINCE 1983 LIMITED | Private company limited by shares | Dissolved |
| We Since 2013 Limited | Private company limited by shares | Live |
| SINCE ALIVE LIMITED | Private company limited by shares | Live |
| Since Alive Limited | | Live |
| Since Shoes Materials Co., Limited | Private company limited by shares | Live |
| SINCE WANG CO., LIMITED | Private company limited by shares | Live |
| EASY SINCE LIMITED | Private company limited by shares | Dissolved |
| WIN SINCE ENTERPRISES LIMITED | Private company limited by shares | Live |
| TIN SINCE GOLD LIMITED | Private company limited by shares | Dissolved |
| GRAND SINCE LIMITED | Private company limited by shares | Dissolved |
| Since Group Limited | Private company limited by shares | Live |
| SINCE ASIA GROUP LIMITED | Private company limited by shares | Dissolved |
| SINCE JOB INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SINCE Technology Limited | Private company limited by shares | Live |
| Since Today Limited | Private company limited by shares | Live |
| SINCE TRADING LIMITED | Private company limited by shares | Live |
| WELL SINCE LIMITED | Private company limited by shares | Dissolved |
| CANADIAN EXHIBITIONS GROUP SINCE-1975 LIMITED | Private company limited by shares | Dissolved |
| HK SINCEE VIVERS STOCK CO., LIMITED | Private company limited by shares | Dissolved |
| SINO-AFRICA SINCEER INTERNATIONAL GROUP CO., LIMITED | Private company limited by shares | Live |
| SINCEER INNOVATION & INVESTMENT LIMITED | | Live |
| SINCEERE (HONGKONG) TRADING COMPANY LIMITED | Private company limited by shares | Live |
| SINCEFORD INVESTMENT LIMITED | Private company limited by shares | Live |
| SINCEIRO ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Sincel Network Technology Co., Limited | | Live |
| Sincell Parts Technology Co., Limited | Private company limited by shares | Live |
| Sincem (Hong Kong) Co., Limited | | Live |
| Sincemark Technology Co., Limited | Private company limited by shares | Dissolved |
| Sincen Smart (Hong Kong) Co., Limited | Private company limited by shares | Live |
| SINCEN PRINTING COMPANY LIMITED | Private company limited by shares | Dissolved |
| SINCERE COMPANY LIMITED -THE- | Private company limited by shares | Dissolved |
| SINCERE COMPANY, LIMITED -THE- | Public company limited by shares | Live |
| SINCERE WAY COMPANY LIMITED | Private company limited by shares | Live |
| JAY SINCERE LIMITED | Private company limited by shares | Dissolved |
| SINCERE SUN LIMITED | Private company limited by shares | Dissolved |
| SINCERE BAR LIMITED | Private company limited by shares | Live |
| YAM SINCERE LIMITED | Private company limited by shares | Dissolved |
| TOP SINCERE LIMITED | Private company limited by shares | Dissolved |
| SINCERE JOY LIMITED | Private company limited by shares | Live |
| SUN SINCERE LIMITED | Private company limited by shares | Dissolved |
| SINCERE FUN LIMITED | Private company limited by shares | Dissolved |
| NEW SINCERE LIMITED | Private company limited by shares | Dissolved |
| SINCERE WIN LIMITED | Private company limited by shares | Dissolved |
| KEY SINCERE LIMITED | Private company limited by shares | Dissolved |
| SINCERE TOP LIMITED | Private company limited by shares | Dissolved |
| ART SINCERE LIMITED | Private company limited by shares | Dissolved |
| ALL SINCERE LIMITED | Private company limited by shares | Dissolved |
| JAY SINCERE LIMITED | Private company limited by shares | Live |
| SUN SINCERE LIMITED | Private company limited by shares | Dissolved |
| SKY SINCERE LIMITED | Private company limited by shares | Dissolved |
| HK SINCERE COMPANY LIMITED | Private company limited by shares | Dissolved |
| SINCERE ON LIMITED | Private company limited by shares | Live |
| SINCERE SKY LIMITED | Private company limited by shares | Live |
| TOP SINCERE LIMITED | Private company limited by shares | Dissolved |
| MAX SINCERE LIMITED | Private company limited by shares | Dissolved |
| SINCERE ART LIMITED | Private company limited by shares | Live |
| SINCERE PRO LIMITED | Private company limited by shares | Live |
| ART SINCERE LIMITED | Private company limited by shares | Live |
| MAX SINCERE LIMITED | Private company limited by shares | Live |
| JOY SINCERE LIMITED | Private company limited by shares | Live |
| SKY SINCERE COMPANY LIMITED | Private company limited by shares | Live |
| SINCERE WAY INC LIMITED | Private company limited by shares | Live |
| SINCERE ACE LIMITED | Private company limited by shares | Live |
| Max Sincere HK Limited | Private company limited by shares | Live |
| SINCERE KEY LIMITED | Private company limited by shares | Live |
| TOP SINCERE LIMITED | | Live |
| ON SINCERE LIMITED | | Live |
| NEW SINCERE LIMITED | | Live |
| Sincere A&T Limited | | Live |
| ABLE SINCERE LIMITED | Private company limited by shares | Live |
| SINCERE ACCESSORIES LIMITED | Private company limited by shares | Live |
| Sincere Accessory Limited | Private company limited by shares | Live |
| ACI Sincere Adheresco Limited | Private company limited by shares | Dissolved |
| SINCERE ESTATE AGENCY COMPANY LIMITED | Private company limited by shares | Dissolved |
| SINCERE INSURANCE AGENCY LIMITED | Private company limited by shares | Dissolved |
| SINCERE PROPERTIES AGENCY LIMITED | Private company limited by shares | Live |
| SINCERE AIR-CONDITIONING COMPANY LIMITED | Private company limited by shares | Dissolved |
| SINCERE ALLIANCE LIMITED | Private company limited by shares | Live |
| ALLIED SINCERE LIMITED | Private company limited by shares | Dissolved |
| SINCERE ALLIED LIMITED | Private company limited by shares | Live |
| SINCERE ARCHITECTS LIMITED | Private company limited by shares | Dissolved |
| SINCERE WAY (ASIA) LIMITED | Private company limited by shares | Dissolved |
| SINCERE ASIA LIMITED | Private company limited by shares | Dissolved |
| ASIA SINCERE LIMITED | Private company limited by shares | Dissolved |