| SECO LIMITED | Private company limited by shares | Dissolved |
| SECO CO. LIMITED | Private company limited by shares | Dissolved |
| SECO LIMITED | Private company limited by shares | Live |
| SECO ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SECO ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SECODATA TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| SECO-ELECTRONIC COMPANY LIMITED | Private company limited by shares | Dissolved |
| ISTITUTO SECOLARE ANCELLE DELLA MISERICORDIA LIMITED | Private company limited by shares | Dissolved |
| SECOLO LIMITED | Private company limited by shares | Live |
| SECOM LIMITED | Private company limited by shares | Dissolved |
| Secomau Limited | Private company limited by shares | Live |
| Secomm Technology Limited | Private company limited by shares | Live |
| SECONA LIMITED | Private company limited by shares | Dissolved |
| SECOND VOW LIMITED | Private company limited by shares | Live |
| M SECOND COMPANY LIMITED | Private company limited by shares | Live |
| Second Box Company Limited -The- | Private company limited by shares | Live |
| Second Limited | Private company limited by shares | Live |
| Second Day Limited | Private company limited by shares | Live |
| The Second Pig Limited | | Live |
| DE SECOND LIMITED | | Live |
| C&S SECOND LIMITED | | Live |
| Second Above Limited | | Live |
| SECOND Advisories Limited -The- | Private company limited by shares | Live |
| ARCHER SECOND LIMITED | Private company limited by shares | Dissolved |
| SECOND CUP ASIA LIMITED | Private company limited by shares | Dissolved |
| Second Cup Asia Limited | Private company limited by shares | Live |
| SECOND BASE INVESTMENTS LIMITED | Private company limited by shares | Live |
| Second Bite Limited | Private company limited by shares | Live |
| Second Bonding Limited | | Live |
| SECOND BOOKSTORE LIMITED -THE- | Private company limited by shares | Live |
| SECOND CHANCE LIMITED -THE- | Private company limited by shares | Dissolved |
| SECOND CHANCE LIMITED | Private company limited by shares | Live |
| SECOND CHANCE ANIMAL AID LIMITED | Company limited by guarantee | Dissolved |
| Second ACT CO., LIMITED | Private company limited by shares | Live |
| Second Supply Chain Co., Limited | Private company limited by shares | Live |
| Second Life Experience Centre Co., Limited | Private company limited by shares | Live |
| SECOND NATIONAL CO., LIMITED | Private company limited by shares | Live |
| SECOND CUP COFFEE CO. LIMITED | Private company limited by shares | Dissolved |
| SECOND COMING LIMITED -THE- | Private company limited by shares | Live |
| Second Wave Creation Group Limited | Private company limited by shares | Live |
| SECOND ENCOUNTER LIMITED | Private company limited by shares | Live |
| Second Enlightenment Technology Limited | | Live |
| SECOND EXCHANGE LIMITED | Private company limited by shares | Dissolved |
| 90 SECOND EXPLAINER VIDEOS LIMITED | Private company limited by shares | Live |
| Second Hand First Love Limited | | Live |
| SECOND FORM LIMITED | Private company limited by shares | Dissolved |
| FIRST FRIENDS AND SECOND FRIENDS LIMITED | Private company limited by shares | Dissolved |
| Second Frog Limited | Private company limited by shares | Live |
| Shenzhen Gold Phoenix Second Furniture Company., Limited | Private company limited by shares | Live |
| Second Half Glory Limited | Private company limited by shares | Live |
| Second Group Limited | Private company limited by shares | Live |
| SECOND PAGE CATERING GROUP LIMITED | Private company limited by shares | Live |
| SECOND HARVEST CONSULTING ASIA LIMITED | Private company limited by shares | Live |
| One Minute One Second (Hong Kong) Limited | Private company limited by shares | Live |
| SECOND IMAGE TEXTILES LIMITED | Private company limited by shares | Dissolved |
| TIMES INVESTMENT SECOND LIMITED | Private company limited by shares | Live |
| SECOND JEWELRY LIMITED | Private company limited by shares | Live |
| SECOND KILL LIMITED | Private company limited by shares | Live |
| SECOND LIFE LIMITED | Private company limited by shares | Live |
| SECOND LIFE-SCIENCES COMPANY LIMITED | Private company limited by shares | Live |
| SECOND LINE LIMITED -THE- | Private company limited by shares | Dissolved |
| SECOND LINE LIMITED -THE- | Private company limited by shares | Dissolved |
| Second Link Asia Company Limited | Private company limited by shares | Live |
| SECOND HAND MALL LIMITED | Private company limited by shares | Live |
| SECOND MILLION ASSETS LIMITED | Private company limited by shares | Live |
| Second Mind Limited | Private company limited by shares | Live |
| Ye Second Floor Rear Music Company Limited | Private company limited by shares | Live |
| NEVER SECOND COMPANY, LIMITED | Private company limited by shares | Live |
| NEVER SECOND ELECTRICAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Never Second (Holding) Co. Limited | Private company limited by shares | Live |
| NEVER SECOND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SECOND NURTURE LIMITED | Private company limited by shares | Dissolved |
| PT. Second Best Packing Limited | Private company limited by shares | Live |
| YIBO PARKING SECOND HOLDING LIMITED | Private company limited by shares | Dissolved |
| SECOND BITE PATISSERIE LIMITED | Private company limited by shares | Live |
| MAKONG PROPERTY SECOND LIMITED | Private company limited by shares | Live |
| SECOND REACH LIMITED | Private company limited by shares | Live |
| READY-TO-WEAR CENTRE (SECOND FACTORY) LIMITED | Private company limited by shares | Dissolved |
| SECOND ROUND LIMITED | | Live |
| Second Sense Limited | Private company limited by shares | Live |
| Second Skyrise Limited | Private company limited by shares | Live |
| Second Skin Solutions Limited | | Live |
| Speed Second Hand Limited | | Live |
| SPLIT SECOND LIMITED | Private company limited by shares | Live |
| SECOND STAGE COMPANY LIMITED | Private company limited by shares | Dissolved |
| Second Star Company Limited | | Live |
| Second State Company Limited | Private company limited by shares | Live |
| SECOND STEP LIMITED | Private company limited by shares | Dissolved |
| Second Step Capital Limited | Private company limited by shares | Live |
| SECOND STRENGTH INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Studio at Second Limited | Private company limited by shares | Live |
| SECOND SUNSHINE COMPANY LIMITED | Private company limited by shares | Live |
| Second Space Tech Limited | Private company limited by shares | Live |
| BT SECOND TECHNOLOGY HK LIMITED | Private company limited by shares | Live |
| SECOND LIFE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Second Thousand Thousand Limited | Private company limited by shares | Live |
| No Second Choice Trading Limited | | Live |
| PRESERVED EGG SECOND TRADING LIMITED | Private company limited by shares | Live |
| Second Life Translations Limited | | Live |
| WAI TUNG SECOND DENTAL LIMITED | | Live |