| Asia Tech Engineering & Contracting W.L.L | Construction |
| Asian Insulation Company Qatar W.L.L. | Construction |
| Askar Industries Company W.L.L | Industrial Manufacturing |
| Aspetar | Health Care |
| Aspetar Qatar Orthopaedic and Sports Medicine Hospital | Health Care |
| Aspire Academy for Sports Excellence | Education |
| Assaco Design Metal Construction | Construction |
| Assets Real Estate Development Co. WLL | Real Estate |
| Assiyana | Services |
| AST Digital Printer Center | Media |
| Asta Consulting | Services |
| Astad Engineering Consultancy and Project Management | Construction |
| Aswan Trading & Contracting Co. | Mining and Metals |
| Athab Qatar Engineering and Contracting Company W.L.L. | Construction |
| Atlanta Shipping & Marine Services | Transport |
| Atlantic Ocean Trading Company W.L.L | Retail |
| ATMOC WLL | Conglomerates |
| Atop Uniforms Company | Consumer Goods |
| Automak Car Rental | Transport |
| Avon Trading & Contracting Company W.L.L. | Construction |
| Awad ali trading & contacting | Oil and Gas |
| Awsaj Academy | Education |
| Ayn Al Shaheen Films | Media |
| A and S High Tech Solutions | Information Technology |
| A to Z Services | Services |
