| ACORP INTERNATIONAL ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| ACORSON LIMITED | Private company limited by shares | Dissolved |
| Acorus Properties Limited | Private company limited by shares | Live |
| ACOS (ASIA) LIMITED | Private company limited by shares | Live |
| ACOS (CHINA) LIMITED | Private company limited by shares | Live |
| ACOS METAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| Acosec Services Limited | Private company limited by shares | Live |
| ACOSKA LIMITED | Private company limited by shares | Live |
| Acoss Limited | Private company limited by shares | Live |
| ACOSTA. LIMITED | Private company limited by shares | Live |
| ACOSTA PACIFIC LIMITED | Private company limited by shares | Live |
| ACOSTAR LIMITED | Private company limited by shares | Dissolved |
| ACOSYS LIMITED | Private company limited by shares | Live |
| ACOT INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| ACOTA LIMITED | Private company limited by shares | Live |
| ACOTAINERS LIMITED | Private company limited by shares | Dissolved |
| ACOTEX HK LIMITED | Private company limited by shares | Live |
| Aco-tion Company Limited | | Live |
| ACOUMA LIMITED | Private company limited by shares | Dissolved |
| Acoust Technology Limited | | Live |
| ACOUSTECH LIMITED | Private company limited by shares | Live |
| TC ACOUSTIC LIMITED | Private company limited by shares | Live |
| Acoustic Limited | | Live |
| Oule Singen Aero & Acoustic Technology Limited | Private company limited by shares | Live |
| Alex Acoustic & Cable Limited | Private company limited by shares | Live |
| AVON ACOUSTIC LIMITED | Private company limited by shares | Live |
| BAIWEI ACOUSTIC (HK) CO., LIMITED | Private company limited by shares | Live |
| CN ACOUSTIC CO., LIMITED | Private company limited by shares | Live |
| TDS ACOUSTIC CO., LIMITED | Private company limited by shares | Live |
| ACOUSTIC COMPONENT LIMITED | Private company limited by shares | Dissolved |
| BEST ACOUSTIC COMPONENTS (HK) LIMITED | Private company limited by shares | Live |
| Acoustic Consulting Company Limited | Private company limited by shares | Live |
| DAIWA ACOUSTIC PRODUCTS MANUFACTURING LIMITED | Private company limited by shares | Live |
| ACOUSTIC DETERRENT SYSTEMS LIMITED | Private company limited by shares | Live |
| Acoustic Dimensionality Technology Co. Limited | Private company limited by shares | Live |
| ACOUSTIC DYNAMICS LIMITED | Private company limited by shares | Live |
| EASE (CHINA) ACOUSTIC DESIGN AND CONSULTING LIMITED | Private company limited by shares | Live |
| GRAND EAST ACOUSTIC (HK) CO. LIMITED | Private company limited by shares | Dissolved |
| ACOUSTIC ELEMENT LIMITED | Private company limited by shares | Live |
| ACOUSTIC ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| AME Acoustic Material & Engineering Co., Limited | Private company limited by shares | Live |
| SAFFIRE ACOUSTIC ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| Raymond Acoustic Technology Engineering Limited | Private company limited by shares | Live |
| FIDUE ACOUSTIC LIMITED | Private company limited by shares | Live |
| GOLD FRUIT ACOUSTIC TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Fulcrum Acoustic Asia Limited | Private company limited by shares | Live |
| LONG FUNG ACOUSTIC MANUFACTORY LIMITED | Private company limited by shares | Live |
| GLOBAL ACOUSTIC PRODUCTS LIMITED | Private company limited by shares | Live |
| GLOBAL ACOUSTIC TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| GOLD OCEAN ACOUSTIC LIMITED | Private company limited by shares | Live |
| Guangzhou Shengyi Electro Acoustic Limited | Private company limited by shares | Live |
| ACOUSTIC HARMONIC LIMITED | Private company limited by shares | Live |
| Hong Kong Acoustic Industrial Co., Limited | Private company limited by shares | Live |
| Anyi Acoustic (Hong Kong) Co., Limited | Private company limited by shares | Live |
| HONG KONG LANGJUN ACOUSTIC CO., LIMITED | Private company limited by shares | Live |
| DRAGON ACOUSTIC INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| Initial Acoustic Electronic Co., Limited | Private company limited by shares | Live |
| ACOUSTIC INNOVATION LIMITED | Private company limited by shares | Live |
| ACOUSTIC ARC INTERNATIONAL LIMITED | Private company limited by shares | Live |
| JADE ACOUSTIC LIMITED | Private company limited by shares | Live |
| KINGLUX ACOUSTIC COMPANY LIMITED | Private company limited by shares | Dissolved |
| Acoustic Metamaterials Company Limited | Private company limited by shares | Live |
| MUKO ACOUSTIC CO., LIMITED | Private company limited by shares | Live |
| ACOUSTIC MUSIC CO. LIMITED | Private company limited by shares | Dissolved |
| Omni Acoustic Company Limited | Private company limited by shares | Live |
| Orca Acoustic Limited | Private company limited by shares | Live |
| OCEAN PACIFIC ACOUSTIC LIMITED | Private company limited by shares | Dissolved |
| TWD ACOUSTIC PRODUCTS LIMITED | Private company limited by shares | Live |
| Acoustic Professor Technology Company Limited | Private company limited by shares | Live |
| RONSTAR ACOUSTIC LIMITED | Private company limited by shares | Dissolved |
| Acoustic Solution (HK) Company Limited | Private company limited by shares | Live |
| Joe's Acoustic Studio Limited | Private company limited by shares | Live |
| AAC ACOUSTIC TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| GLOBAL ACOUSTIC TECHNOLOGIES (HK) LIMITED | Private company limited by shares | Dissolved |
| ACOUSTIC PRO TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| Acoustic Technology Limited | Private company limited by shares | Live |
| Acoustic Arc Technology Limited | Private company limited by shares | Live |
| CAR ACOUSTIC TECHNOLOGY HK LIMITED | Private company limited by shares | Live |
| Acoustic Abyss Technology Limited | | Live |
| E&E Acoustic Technology Co., Limited | Private company limited by shares | Live |
| TASSO ACOUSTIC TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| TENDO ACOUSTIC CO., LIMITED | Private company limited by shares | Live |
| Tianyu Acoustic Co., Limited | | Live |
| UNITED ACOUSTIC (ASIA) LIMITED | Private company limited by shares | Live |
| VISUAL ACOUSTIC INTERNATIONAL LIMITED | Private company limited by shares | Live |
| PXD ACOUSTIC WORKS CO., LIMITED | Private company limited by shares | Live |
| BADER ELECTRO ACOUSTICAL (GERMANY) LIMITED | Private company limited by shares | Live |
| NEW-GLORY ELECTRO ACOUSTICAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ACOUSTICAL ENTERPRISES (H.K.) LIMITED | Private company limited by shares | Dissolved |
| AOLAITE INT'L ELECTRO ACOUSTICAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ACOUSTICRAFX LIMITED | Private company limited by shares | Dissolved |
| JAM ACOUSTICS LIMITED | Private company limited by shares | Dissolved |
| MAN ACOUSTICS LIMITED | Private company limited by shares | Live |
| THD ACOUSTICS LIMITED | Private company limited by shares | Live |
| PTS ACOUSTICS LIMITED | Private company limited by shares | Dissolved |
| AP ACOUSTICS LIMITED | Private company limited by shares | Live |
| COD ACOUSTICS LIMITED | Private company limited by shares | Live |
| KUN NAI ACOUSTICS LIMITED | Private company limited by shares | Live |
| ADVANCED ACOUSTICS LIMITED | Private company limited by shares | Live |
| AEROTECH ACOUSTICS LIMITED | Private company limited by shares | Live |