| Abu Hail Trading & Contracting Co WLL | Construction |
| Abu Issa Holding | Retail |
| Access Gulf Trading & Contracting WLL Qatar | Conglomerates |
| Accord Real Estate And Car Rentals | Conglomerates |
| ACON Travels & Rent a Car | Leisure and Tourism |
| Acongulf W.L.L. | Real Estate |
| Acontec Engineering WLL | Construction |
| Action International Services LLC | Industrial Manufacturing |
| Ad Astra WLL | Construction |
| Adam Import & Export & Real Estate | Real Estate |
| Adept Tech | Information Technology |
| ADIB Qatar | Financial Services |
| Advance Technologies & Solution | Information Technology |
| Advanced Business Computing W.L.L. | Information Technology |
| Advanced Technical Services W.L.L | Education |
| AEA Designs | Services |
| AECOM Middle East - Doha | Construction |
| Aegis Services W.L.L. | Services |
| Aero Freight Company Limited | Transport |
| Affinity Logistics Co WLL | Services |
| AFFIX SCAFFOLDING WLL | Construction |
| AGA-MEP Contracting & Engineering Co. LLC. | Construction |
| Agbizz Events and Media | Media |
| Age Corporation WLL | Construction |
| Agial Enterprises | Construction |
