| SUMKO LIMITED | Private company limited by shares | Dissolved |
| SUMKO INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SUMLAC CONCRETE BLOCKS, PRE-CAST MANUFACTORY LIMITED | Private company limited by shares | Dissolved |
| SUMLAC QUARRY LIMITED | Private company limited by shares | Dissolved |
| SUMLAND LIMITED | Private company limited by shares | Dissolved |
| SumLaw & Co. Limited | Private company limited by shares | Live |
| SUMLEASE FINANCE LIMITED | Private company limited by shares | Dissolved |
| SUMLEASE INVESTMENT LIMITED | Private company limited by shares | Live |
| SUMLEASE SHIPPING LIMITED | Private company limited by shares | Dissolved |
| SUMLIGHT LIMITED | Private company limited by shares | Dissolved |
| Sumlink Technology Limited | | Live |
| SUMLOK COMPANY LIMITED | | Live |
| HK SUMLONG (INT'L) DRESS LIMITED | Private company limited by shares | Dissolved |
| SUMLUCK FURNITURE LIMITED | Private company limited by shares | Dissolved |
| SUMLUCK INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SUMLUNG TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SUMLY ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Modum Summ Capital Limited | Private company limited by shares | Live |
| SUMMA ECI LIMITED | Private company limited by shares | Dissolved |
| SUMMA LIMITED | Private company limited by shares | Dissolved |
| Summa Company Limited | Private company limited by shares | Live |
| SUMMA CAPITAL LIMITED | Private company limited by shares | Dissolved |
| SUMMA ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SUMMAGRAPHICS FAR EAST LIMITED | Private company limited by shares | Dissolved |
| Summan Company Limited | Private company limited by shares | Live |
| SUMMAN BASKETBALL COMPANY LIMITED | Private company limited by shares | Live |
| SUMMAN ENGINEERING LIMITED | Private company limited by shares | Live |
| SUMMANA COMPANY LIMITED | Private company limited by shares | Dissolved |
| Summanus Limited | | Live |
| Summarize Limited | Private company limited by shares | Live |
| Summary Limited | Private company limited by shares | Live |
| SUMMATICS LIMITED | Private company limited by shares | Live |
| Summation Group Limited | Private company limited by shares | Live |
| SUMMATION X HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| Summation FinTech (Hong Kong) Limited | Private company limited by shares | Live |
| SUMMATION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Live |
| SUMMATION OFFICE SYSTEMS CO. LIMITED | Private company limited by shares | Dissolved |
| Summau Investment Co., Limited | | Live |
| SUMMAX COMPANY LIMITED | Private company limited by shares | Live |
| SUMMCO (HONG KONG) LIMITED | Private company limited by shares | Live |
| SUMMEDIA.COM.ASIA LIMITED | Private company limited by shares | Dissolved |
| SUMMEDIA.COM.HK LIMITED | Private company limited by shares | Dissolved |
| SumMei HealthTec Limited | Private company limited by shares | Live |
| SUMMEI LABELS COMPANY LIMITED | Private company limited by shares | Live |
| SumMei (Hong Kong) Technology Limited | Private company limited by shares | Live |
| SUMMENG LIMITED | Private company limited by shares | Dissolved |
| PO SUMMER COMPANY LIMITED | Private company limited by shares | Dissolved |
| SUMMER WAY LIMITED | Private company limited by shares | Dissolved |
| SUMMER SKY LIMITED | Private company limited by shares | Dissolved |
| SUMMER JOY LIMITED | Private company limited by shares | Dissolved |
| SUMMER SUN COMPANY LIMITED | Private company limited by shares | Dissolved |
| SUMMER LIMITED | Private company limited by shares | Dissolved |
| SUMMER WIN LIMITED | Private company limited by shares | Live |
| SUMMER ART LIMITED | Private company limited by shares | Dissolved |
| SUMMER SUN LIMITED | Private company limited by shares | Dissolved |
| SUMMER LIMITED | Private company limited by shares | Live |
| Summer Lai Limited | Private company limited by shares | Live |
| SUMMER SKY LIMITED | Private company limited by shares | Live |
| Summer Ice Limited | Private company limited by shares | Live |
| KI SUMMER LIMITED | Private company limited by shares | Live |
| SUMMER JOY LIMITED | Private company limited by shares | Live |
| LEO SUMMER LIMITED | Private company limited by shares | Live |
| SUMMER ART LIMITED | Private company limited by shares | Live |
| HEA SUMMER COMPANY LIMITED | Private company limited by shares | Live |
| SEE SUMMER LIMITED | Private company limited by shares | Live |
| TOP SUMMER LIMITED | Private company limited by shares | Live |
| Summer Mae Limited | Private company limited by shares | Live |
| SUMMER SKY LIMITED | | Live |
| SUMMER 44 LIMITED | | Live |
| SUMMER FAN LIMITED | | Live |
| SUMMER 1 LIMITED | | Live |
| SUMMER 2 LIMITED | | Live |
| SUMMER 3 LIMITED | | Live |
| SUMMER 4 LIMITED | | Live |
| SUMMER 5 LIMITED | | Live |
| Summer May Company Limited | | Live |
| SUMMER 03 LIMITED | | Live |
| SUMMER HK LIMITED | | Live |
| SUMMER ONE LIMITED | | Live |
| SUMMER DAY LIMITED | | Live |
| SUMMER AIRWAYS LIMITED | | Live |
| Amazing Summer Limited | | Live |
| AQUARIUS SUMMER LIMITED | Private company limited by shares | Live |
| ARIES SUMMER LIMITED | Private company limited by shares | Live |
| Summer Asia Limited | Private company limited by shares | Dissolved |
| SUMMER ASIA LIMITED | Private company limited by shares | Live |
| Summer Atlantic Capital Limited | Private company limited by shares | Live |
| Summer Atlantic Capital Holding Limited | Private company limited by shares | Live |
| SUMMER AUDIO TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| BANANA SUMMER LIMITED | Private company limited by shares | Live |
| SUMMER BEACH LIMITED | Private company limited by shares | Dissolved |
| Summer Beauty Limited | Private company limited by shares | Live |
| Summer WL Beauty Limited | | Live |
| SUMMER BERRY INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SUMMER BEST LIMITED | Private company limited by shares | Live |
| SUMMER BLAST, LIMITED | Private company limited by shares | Dissolved |
| SUMMER BLAZE LIMITED | Private company limited by shares | Live |
| SUMMER BLAZE LIMITED | Private company limited by shares | Live |
| BLESSING SUMMER LIMITED | Private company limited by shares | Live |
| Summer Bloom Limited | Private company limited by shares | Dissolved |