| In-Docs |
| In-Situ-In-Place |
| Independent Arts Projects |
| Independent Hostels UK |
| Independent Talent Group Limited |
| Indian Institute of Crafts & Design |
| Indian Institute of Science Education and Research (IISER Pune) |
| Indian National Students Association (INSA-UK) CIC |
| Inditex Group |
| Indus Valley School of Art and Architecture |
| Infinity Foods Co-operative Limited |
| Influence Digital |
| Ingka Holding B.V |
| Initiative for Heritage Conservation |
| Injaro Investments Limited |
| Innovate UK |
| Innovation 1st |
| Innovation Partners |
| Insaan Culture Club |
| Inspera AS |
| Inspirate |
| Inspired Pet Nutrition Limited (was Wagg Foods Ltd) |
| Instagram LLC |
| Institut Pedagogique National de I’Enseignement Technique et Professionel |
| Institute for Strategic Dialogue |