| Apple Taiwan | Taiwan |
| Apple Xidan Joy City | Beijing |
| AppleClub | Taiwan |
| Appointech, Inc. | Taiwan |
| Apposite Solution Ltd | Hong Kong |
| AppPark.cn | Guangdong |
| AppWorks Ventures | Taiwan |
| APrevent Medical Ltd | Taiwan |
| APRINOIA Therapeutics | |
| Apris Technologies Co., Ltd | Jiangsu |
| APT Satellite Co., Ltd | Hong Kong |
| Apusic | Guangdong |
| Aquim | Guangdong |
| AQUMON | Hong Kong |
| Arbele Ltd | Hong Kong |
| ARBOR Technology Corporation | Taiwan |
| ARCH Capital | |
| Archforce Technology | Guangdong |
| Arcotect Ltd | Hong Kong |
| ARCS Precision Technology Co., Ltd | Taiwan |
| Arctic Vision Hong Kong Biotech Ltd | Hong Kong |
| Areca Technology Corporation | Taiwan |
| Areson, Inc. | Taiwan |
| Arestós | |
| Arex Communications (HK) Co., Ltd | Hong Kong |
| Argosy Research, Inc. | |
| ARISTOTLE Design | Taiwan |
| Ark Biopharmaceutical | |
| ARK Electronic Co., Ltd | Hong Kong |
| Arlitech Electronic Corporation | Taiwan |
| Army Medical University | |
| Armybeat Electronic Co., Ltd | Guangdong |
| ARMYSoft Technology Co., Ltd | |
| Arontac Systems Ltd | Hong Kong |
| Arphic Technology Co., Ltd | Taiwan |
| Art Fair Enterprise Ltd | Hong Kong |
| Artech Technology Co., Ltd | Taiwan |
| Artie Design Enterprise Co., Ltd | Taiwan |
| Artivila Biopharma Co., Ltd | |
| Artplus International Ltd | Hong Kong |
| Arts Electronics Co., Ltd | Hong Kong |
| Ascentage | |
| Ascletis BioScience Co., Ltd | Zhejiang |
| ASE Technology Holding Co., Ltd | Taiwan |
| Aseal, Inc. | Taiwan |
| Asia Money Fintech Company | Taiwan |
| Asia Pacific Advantage Microsystems Co., Ltd | Taiwan |
| Asia Pacific Compunet Ltd | Hong Kong |
| Asia Pacific Hosting | Hong Kong |
| Asia Pacific Space Cooperation Organization | |