| S.E.C. Accessories Limited | Private company limited by shares | Live |
| SECA Academy Hongkong Limited | Private company limited by shares | Live |
| ARROYO SECA LIMITED | Private company limited by shares | Dissolved |
| SECA Incorporate (Hongkong) Limited | Private company limited by shares | Live |
| SECA INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| SECA Motorsports Limited | Private company limited by shares | Live |
| Secabo Limited | Private company limited by shares | Dissolved |
| BIAOZHI SECAI CO., LIMITED | Private company limited by shares | Live |
| HK SECAI TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| HONG KONG SECAIHANG CULTURES DISSEMINATION LIMITED | Private company limited by shares | Dissolved |
| SECAL LIMITED | Private company limited by shares | Live |
| SECAN LIMITED | Private company limited by shares | Live |
| SECARE INTERNATIONAL TRADING (HONGKONG) COMPANY LIMITED | Private company limited by shares | Live |
| Secceful Technology Co., Limited | Private company limited by shares | Live |
| Hong Kong SECCES Investment Management Company Limited | Private company limited by shares | Live |
| SECCHIC COMPANY LIMITED | Private company limited by shares | Live |
| SECCO CHINA CO., LIMITED | Private company limited by shares | Live |
| Secco HuiFeng Set Co., Limited | | Live |
| Secco Eko Technology Co., Limited | Private company limited by shares | Live |
| SECCO ELECTRONICS (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| HONGKONG SECCO RANGE COATING LIMITED | Private company limited by shares | Live |
| Secco Offshore Service (HongKong) Limited | Private company limited by shares | Live |
| SECCO EXS INTERNATIONAL (HONGKONG) LIMITED | Private company limited by shares | Live |
| SECCO ARCHITECTURAL SERVICES LIMITED | Private company limited by shares | Dissolved |
| Secco Technology Limited | Private company limited by shares | Live |
| SecDev Capital Limited | Private company limited by shares | Live |
| SECDIN LIMITED | Private company limited by shares | Live |
| Young Seceret Limited | Private company limited by shares | Live |
| SECESPOL ASIA CO., LIMITED | Private company limited by shares | Live |
| SECESPOL TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| SECESSION LIMITED | Private company limited by shares | Live |
| SECFUNNY LIMITED | | Live |
| Secga Data Limited | Private company limited by shares | Live |
| SEC-GROW FASHION CO. (H.K.) LIMITED | Private company limited by shares | Live |
| SECH Group (HK) Limited | Private company limited by shares | Dissolved |
| SECHEA INDUSTRIAL LIMITED | Private company limited by shares | Live |
| SECHOUSE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Sechs Company Limited | | Live |
| SECHURA COMPANY LIMITED | Private company limited by shares | Dissolved |
| SECID LIMITED | Private company limited by shares | Dissolved |
| FONG'S HI-TECH ENVIRONMENTAL SECIENCE AND TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SECILIAN CARE AND HOMES LIMITED | Private company limited by shares | Live |
| Secintellgent Technologies Co., Limited | Private company limited by shares | Live |
| Seck Limited | Private company limited by shares | Live |
| SECKA LIMITED | Private company limited by shares | Live |
| SECKFORD LIMITED | Private company limited by shares | Dissolved |
| SECKFORD-LAWRANCE LIMITED | Private company limited by shares | Dissolved |
| SECK&FRERES SENEGAL LIMITED | Private company limited by shares | Live |
| SECKON COMPANY LIMITED | Private company limited by shares | Dissolved |
| Secluded Villas Limited | | Live |
| SECMAN COMPANY LIMITED | Private company limited by shares | Dissolved |
| SECNOMCON LIMITED | Private company limited by shares | Live |
| SECNOVO LIMITED | Private company limited by shares | Live |
| 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 |