| i4 Solutions W.L.L. | Information Technology |
| Ibin Ajayan Group | Transport |
| Ideal Marketing and Services W.L.L | Food and Beverages |
| Ideal Solutions Company W.L.L | Information Technology |
| IFC - INTERNATIONAL FILTER CENTER | Services |
| Image Point Media Solution W.L.L | Media |
| Imalco Paints | Construction |
| Impulse Contracting W.L.L | Services |
| Inarat Trading and Services Company | Industrial Manufacturing |
| Inchcape Shipping Services (Qatar) W.L.L. | Transport |
| Industrial Cable Management System Company | Industrial Manufacturing |
| Industrial Equipment & Services Company L.L.C. | Industrial Manufacturing |
| Industries Qatar Q.S.C. | Mining and Metals |
| Infocenter Training & Consulting | Education |
| Inma Company Qatar LLC | Construction |
| Insha Contracting and Trading WLL | Construction |
| Inspection Corrosion Engineering Services W.L.L. | Oil and Gas |
| Insure Plus | Financial Services |
| Intechs Co WLL | Oil and Gas |
| Integra International Trading & Contracting Company W.L.L. | Construction |
| Integral Food Services W.L.L | Food and Beverages |
| Integral Services Company WLL | Consumer Goods |
| Integrated Logistics Co. WLL | Oil and Gas |
| Integrated Logistics Trading & Contracting W.L.L | Transport |
| Integrity & Reliability Engineering Service WLL | Conglomerates |