| SIGHTLY VIEW LIMITED | Private company limited by shares | Live |
| SIGHTMAN MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| SIGHTNOON INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SIGHTON ELECTRONIC LIMITED | Private company limited by shares | Dissolved |
| SIGHTONE LIMITED | Private company limited by shares | Dissolved |
| Sightone Marble Limited | | Live |
| SIGHTOPIA LIMITED | Private company limited by shares | Live |
| SIGHTRICH DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| ALL SIGHTS LIMITED | Private company limited by shares | Live |
| CHINA SIGHTS AND INSIGHTS TOURS LIMITED | Private company limited by shares | Dissolved |
| China Three Sights Industry Group Limited | Private company limited by shares | Live |
| JOYFUL SIGHTS INVESTMENTS LIMITED | Private company limited by shares | Live |
| DO SIGHTSEEING LIMITED | Private company limited by shares | Dissolved |
| JOY SIGHTSEEING CO LIMITED | Private company limited by shares | Dissolved |
| A-ONE SIGHTSEEING LIMITED | Private company limited by shares | Live |
| SINGAPORE SIGHTSEEING CO., LIMITED | Private company limited by shares | Live |
| SightSeeker Limited | Private company limited by shares | Live |
| Sightstone Limited | Private company limited by shares | Live |
| SIGHTWELL LIMITED | Private company limited by shares | Dissolved |
| SIGHTWORTHY PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| SIGHTYET INVESTMENTS LIMITED | Private company limited by shares | Live |
| Sightys Limited | Private company limited by shares | Live |
| SIGI INTERNATIONAL TRADE CO., LIMITED | Private company limited by shares | Live |
| SIGI MAIER INTERNATIONAL DESIGN LIMITED | Private company limited by shares | Dissolved |
| S.I.G.I TECHNOLOGIES CO., LIMITED | Private company limited by shares | Live |
| Sigil Limited | | Live |
| SIGITAL ELECTRONICS COMPANY LIMITED | Private company limited by shares | Dissolved |
| SIGKIO SHOES COMPANY LIMITED | Private company limited by shares | Dissolved |
| SIGLAN LIMITED | Private company limited by shares | Live |
| SIGLETT ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SIGLO LIMITED | Private company limited by shares | Live Commenced dormancy on 18-Jun-2014 |
| SIGLO F & B LIMITED | Private company limited by shares | Live |
| Siglo Cambodia (HK) Limited | Private company limited by shares | Live |
| SIGLO CAPITAL LIMITED | | Live |
| SIGLO HONG KONG LIMITED | Private company limited by shares | Live Commenced dormancy on 16-Dec-2015 |
| SIGLO INDUSTRY LIMITED | Private company limited by shares | Live |
| SIGLO INVESTMENT HK LIMITED | | Live |
| SIGLO PROPERTIES HK LIMITED | | Live |
| SIGLO ROAD LIMITED | | Live |
| New Siglo International Trading Limited | Private company limited by shares | Dissolved |
| SIGMA V LIMITED | Private company limited by shares | Live |
| SIGMA LIMITED | Private company limited by shares | Dissolved |
| SIGMA LIMITED | Private company limited by shares | Live |
| SIX SIGMA LIMITED | Private company limited by shares | Dissolved |
| AMG SIGMA LIMITED | Private company limited by shares | Dissolved |
| Pop Sigma Limited | Private company limited by shares | Live |
| 6 SIGMA LIMITED | Private company limited by shares | Live |
| Lex Sigma Limited | Private company limited by shares | Live |
| Sigma X PTE Limited | Private company limited by shares | Live |
| Sigma 6 Limited | Private company limited by shares | Live |
| Sigma Tau Limited | Private company limited by shares | Live |
| SIGMA ASIA LIMITED | Private company limited by shares | Dissolved |
| SIGMA ASIA LIMITED | Private company limited by shares | Live |
| Sigma V (Asia) Pty Limited | Private company limited by shares | Live |
| SIGMA GI (ASIA) LIMITED | Private company limited by shares | Live |
| SIGMA CAPITAL LIMITED | | Live |
| CHINA SIGMA (H.K.) CO., LIMITED | Private company limited by shares | Live |
| SIGMA CONSORTIUM LIMITED | | Live |
| SIGMA CAPITAL CONSORTIUM LIMITED | | Live |
| Sigma Consultancy Limited | | Live |
| Six Sigma Controls Limited | Private company limited by shares | Live |
| SIGMA DELTA LIMITED | Private company limited by shares | Dissolved |
| SIGMA DIAMONDS LIMITED | Private company limited by shares | Live |
| SIGMA TEL AND ELECTROICS LIMITED | Private company limited by shares | Live |
| SIGMA ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| SIGMA ENTERPRISE LIMITED | Private company limited by shares | Live |
| SIGMA ENTERPRISES LIMITED | Private company limited by shares | Live |
| Sigma Entertainment Limited | Private company limited by shares | Live |
| Sigma Equity Limited | Private company limited by shares | Live |
| SIX SIGMA FINANCE LIMITED | Private company limited by shares | Live |
| SIGMA FOOTWEAR LIMITED | Private company limited by shares | Dissolved |
| Sigma Frontier Limited | | Live |
| SIGMA Greece Limited | Private company limited by shares | Live |
| SIGMA HI-TECH LIMITED | Private company limited by shares | Dissolved |
| SIGMA HOLDING COMPANY LIMITED | Private company limited by shares | Dissolved |
| SIX SIGMA HOLDING LIMITED | Private company limited by shares | Live |
| Sigma Holding Enterprise Limited | Private company limited by shares | Live |
| CHINA HONG KONG SIX SIGMA ASSOCIATION LIMITED | Private company limited by shares | Dissolved |
| SIGMA INSURANCE BROKERS LIMITED | Private company limited by shares | Live Commenced dormancy on 26-Oct-2007 |
| SIGMA INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| SIGMA INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Sigma Capital Investment Limited | Private company limited by shares | Live |
| Sigma Sigma Capital Investment Limited | Private company limited by shares | Live |
| SIGMA INVESTMENT CONSORTIUM LIMITED | | Live |
| SIGMA INVESTMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| SIGMA INVESTMENTS LIMITED | Private company limited by shares | Live |
| SIGMA LEISURE COMPANY LIMITED | Private company limited by shares | Live |
| LIN'S SIGMA LIMITED | Private company limited by shares | Dissolved |
| Sigma Mascot Company Limited | Private company limited by shares | Live |
| SIGMA MICROELECTRONICS LIMITED | Private company limited by shares | Live |
| SIGMA MOBILITY COMPANY LIMITED | | Live |
| ORIENT SIGMA LIMITED | Private company limited by shares | Live |
| Two Sigma Asia Pacific, Limited | Private company limited by shares | Live |
| SIGMA PETRA LIMITED | Private company limited by shares | Dissolved |
| SIGMA POLYCHEM LIMITED | Private company limited by shares | Live |
| SIGMA PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| SIGMA PROTECH COMPANY LIMITED | Private company limited by shares | Live |
| SIGMA RESOURCES LIMITED | Private company limited by shares | Live |
| SIGMA SHIPPING COMPANY, LIMITED -THE- | Private company limited by shares | Live |
| Sigma Solutions Limited | Private company limited by shares | Live |