| I Classroom Limited | Private company limited by shares | Live |
| Fun Classroom Limited | | Live |
| CSD Classroom Limited | | Live |
| All-Round Classroom Limited | Private company limited by shares | Live |
| BAND 1 CLASSROOM LIMITED | Private company limited by shares | Live |
| CLASSROOM CENTRE LIMITED | Private company limited by shares | Live |
| First Classroom Tutorial Centre Company Limited -The- | Private company limited by shares | Live |
| Cheer Classroom Limited | Private company limited by shares | Live |
| CHINESE CLASSROOM LIMITED | Private company limited by shares | Live |
| CLASSROOM CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| CREATIVE CLASSROOM COMPANY LIMITED | Private company limited by shares | Live |
| DoReMi Classroom Limited | Private company limited by shares | Live |
| DRAMATIC CLASSROOM LIMITED | Private company limited by shares | Dissolved |
| Ascending Classroom Education Centre Limited | Private company limited by shares | Live |
| Eureka Classroom Limited | Private company limited by shares | Live |
| Beyond Classroom Foundation Limited | Private company limited by shares | Live |
| FUNG CLASSROOM LIMITED | Private company limited by shares | Live |
| Mr Fung Chinese Classroom Limited | Private company limited by shares | Live |
| Future Classroom Limited | Private company limited by shares | Live |
| GATHER TALENT CLASSROOM LIMITED | Private company limited by shares | Live |
| GRACE CLASSROOM LIMITED | Private company limited by shares | Dissolved |
| HAPPY CLASSROOM LIMITED | Private company limited by shares | Dissolved |
| HEADMISTRESS CLASSROOM LIMITED | Private company limited by shares | Live |
| Yoga Holistic Classroom Limited | | Live |
| Classroom for Democratic Education in Hong Kong Limited | Company limited by guarantee | Live |
| Kapok Classroom (Hong Kong) Limited | Company limited by guarantee | Live |
| HONG WAI ART PHOTOGRAPHY CLASSROOM LIMITED | Private company limited by shares | Live |
| STUDIO CLASSROOM HONG KONG LIMITED | Company limited by guarantee | Live |
| INSPIRE CLASSROOM LIMITED | Private company limited by shares | Live |
| INTELLI-ART CLASSROOM LIMITED | Private company limited by shares | Live |
| INTELLIGENT CLASSROOM LIMITED | | Live |
| INTERACTIVE CLASSROOM LIMITED | Private company limited by shares | Live |
| Classroom International Limited -The- | Private company limited by shares | Live |
| i-STEM CLASSROOM LIMITED | Private company limited by shares | Live |
| JOYFUL CLASSROOM LIMITED | Private company limited by shares | Live |
| Kapok Classroom Limited | Private company limited by shares | Live |
| KIDDY CLASSROOM LEARNING CENTRE LIMITED | Private company limited by shares | Dissolved |
| KIDS COMPANION CLASSROOM LIMITED | Private company limited by shares | Live |
| MISS Lam's Classroom Limited | Private company limited by shares | Live |
| Lecturer's Classroom Limited | Private company limited by shares | Live |
| MARSDOU ELECTRONIC CLASSROOM COMPANY LIMITED | Private company limited by shares | Dissolved |
| Miss Melody Classroom Limited | Private company limited by shares | Live |
| Miss Tam Classroom Limited | Private company limited by shares | Live |
| Miss Amy's Classroom Limited | Private company limited by shares | Live |
| NATURE CLASSROOM LIMITED | Private company limited by shares | Live |
| Ki Ngai Classroom Limited | Private company limited by shares | Live |
| OPEN CLASSROOM LIMITED -THE- | Private company limited by shares | Live |
| Dr. Owl's Classroom Limited | Private company limited by shares | Live |
| Red Panda Classroom Limited | Private company limited by shares | Live |
| CEO PARENT-CHILD CLASSROOM LIMITED | Private company limited by shares | Dissolved |
| AC Phonics & English Classroom Limited | | Live |
| CLASSROOM PUBLICATIONS LIMITED | Private company limited by shares | Live |
| Jinghua Putonghua Classroom Co. Limited | Private company limited by shares | Live |
| TEACHER ZHAO PUTONGHUA CLASSROOM LIMITED | Private company limited by shares | Dissolved |
| CLASSROOM eLearning & Technology Services Limited | Private company limited by shares | Live |
| CLASSROOM SUPPLIES COMPANY LIMITED | Private company limited by shares | Dissolved |
| Jamie's Violin Classroom Limited | Private company limited by shares | Live |
| WeLearn Classroom Limited | Private company limited by shares | Live |
| CHINA WINNER PRACTICE CLASSROOM INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| Classroom334 Limited | Private company limited by shares | Live |
| PHD CLASSROOMS LIMITED | Private company limited by shares | Live |
| LC Classrooms Limited | Private company limited by shares | Live |
| CLASSTIFY TECH LIMITED | Private company limited by shares | Live |
| CLASSTOWN INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| CLASSTUCK LIMITED | Private company limited by shares | Dissolved |
| Classtwo Limited | Private company limited by shares | Live |
| CLASSUP INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CLASSWAY LIMITED | Private company limited by shares | Dissolved |
| CLASSWAY ENTERPRISES COMPANY LIMITED | Private company limited by shares | Dissolved |
| CLASSWELL ASIA LIMITED | Private company limited by shares | Dissolved |
| CLASSWIN LIMITED | Private company limited by shares | Dissolved |
| CLASSWIN INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| CLASSWOOD LIMITED | Private company limited by shares | Dissolved |
| CLASSWORK LIMITED | Private company limited by shares | Dissolved |
| CLASSY COMPANY LIMITED | Private company limited by shares | Dissolved |
| CLASSY LIMITED | Private company limited by shares | Live |
| CLASSY42 LIMITED | Private company limited by shares | Live |
| Classylife Company Limited | Private company limited by shares | Live |
| Classylife HK Limited | | Live |
| CLASSYY CARATS LIMITED | | Live |
| CLAST TRADING LIMITED | Private company limited by shares | Live |
| CLASTAP COMPANY LIMITED | Private company limited by shares | Dissolved |
| NINGBO CLASTAR INDUSTRY AND TRADE CO., LIMITED | Private company limited by shares | Live |
| CLASTER LIMITED | | Live |
| Clastone Limited | Private company limited by shares | Live |