| SecondMarket Asia Limited | Private company limited by shares | Dissolved |
| SECONDMENT LIMITED | Private company limited by shares | Live |
| Secondnatvre Limited | | Live |
| SecondOfMay Limited | Private company limited by shares | Live |
| SECONDOOR LIMITED | Private company limited by shares | Dissolved |
| SECONDOPINION.COM LIMITED | Private company limited by shares | Dissolved |
| 5 SECONDS LIMITED | Private company limited by shares | Live |
| 3 Seconds Limited | | Live |
| THIRTY SECONDS FILM COMPANY LIMITED | Private company limited by shares | Live |
| Ten Seconds Digital Technology (HONGKONG) Co., Limited | Private company limited by shares | Live |
| LIGHT SECONDS TECHNOLOGY (INTERNATIONAL) LIMITED | Private company limited by shares | Live |
| Thirty Seconds Online Shopping Mall HK Limited | | Live |
| MINING SECONDS LIMITED | Private company limited by shares | Live |
| Counting Seconds Mobile Limited | Private company limited by shares | Live |
| NINE SECONDS NINE COMPANY LIMITED | | Live |
| HK SECONDS PAYING TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Three Seconds Trading Limited | Private company limited by shares | Live |
| Twenty Seconds Restaurant Limited | Private company limited by shares | Live |
| Twenty Seconds Workshop Limited | Private company limited by shares | Live |
| Five Seconds Worldwide Limited | Private company limited by shares | Live |
| SecondsGold Trading Limited | Private company limited by shares | Live |
| SECONDUS NOMINEES LIMITED | Private company limited by shares | Live |
| SECONDVIEW MARKET LIMITED | Private company limited by shares | Live |
| SECONEX COMPANY LIMITED | Private company limited by shares | Dissolved |
| SECONOM LIMITED | Private company limited by shares | Live |