| Hydromax Incorporated Limited | Administrative & support | 2004 |
| Hydroscot Energies Ltd | Professional & scientific | 2011 |
| Hyfold Import L.P. | | 2015 |
| Hygieia Cleaning Services Limited | Other services | 2020 |
| Hylion E-Fuels (Dundee) Ltd | Manufacturing | 2025 |
| Hyper Luminal Developments Ltd | Information & communication | 2021 |
| Hyper Luminal Games Ltd | Information & communication | 2014 |
| Hypnot-Eyes Limited | Wholesale & retail | 2009 |
| Hyrex Consulting L.P. | | 2016 |
| Hytech Inter L.P. | | 2015 |
| Höfn Coffee Ltd | Hospitality | 2023 |
| I & a Property Limited | Real estate | 2025 |
| I & G (Monifieth) Ltd | Other services | 2022 |
| I & S Floral Design Ltd | Wholesale & retail | 2023 |
| I Homes Solutions Ltd | Construction | 2017 |
| I Law Legal Ltd | Information & communication | 2025 |
| I&A Dundee Ltd | Wholesale & retail | 2022 |
| I&K Decorators Ltd | Construction | 2022 |
| I&P Properties Ltd | Real estate | 2024 |
| I&R Property Solutions Ltd | Real estate | 2018 |
| I-Design Multi Media Limited | Information & communication | 1995 |
| I-On Dundee Limited | Other services | 2015 |
| I-Revive Limited | Wholesale & retail | 2015 |
| I.Box Cabs Ltd | Transport & logistics | 2020 |
| Iain Law Limited | Wholesale & retail | 2020 |
| IAN Jamieson Farming Partnership Limited | Agriculture & fishing | 2024 |
| IAN Johnstone Services Ltd | Professional & scientific | 2018 |
| IAN Kidd & SON Ltd | Construction | 2011 |
| IAS (Dundee) Ltd. | Construction | 2009 |
| IC Fire & Security Limited | Administrative & support | 2009 |
| IC Project Management Limited | Professional & scientific | 2013 |
| Icdas Foundation | Health & social care | 2006 |
| Ice Beam Ltd. | Information & communication | 2015 |
| Ice Beam Productions Ltd | Information & communication | 2021 |
| Ice Dundee Limited | Arts & recreation | 2019 |
| ICF Contract Services Ltd | Professional & scientific | 2025 |
| Ichi NI SAN Dundee Limited | Administrative & support | 2009 |
| Icon Signs Ltd | Manufacturing | 2012 |
| ICS2 Limited | Manufacturing | 2002 |
| ICT Battery Storage Limited | Professional & scientific | 2022 |
| IEC Inspections Ltd | Construction | 2019 |
| Ifixcommercial Limited | Energy | 2018 |
| Iger Limited | Professional & scientific | 2012 |
| IGK Properties Ltd | Real estate | 2022 |
| Ihttp Ltd | Information & communication | 2019 |
| Ijapa Ltd | Information & communication | 2022 |
| IJS Autos Ltd | Transport & logistics | 2026 |
| Ik&K Taxi Limited | Transport & logistics | 2025 |
| Ikards Ltd | Transport & logistics | 2020 |
| Ikjyot Ltd | Wholesale & retail | 2025 |
| Ikon Hair Extensions Ltd | Other services | 2024 |
| IKR UK Ltd | Wholesale & retail | 2024 |
| Ikram Engineering Services Ltd | Other services | 2012 |
| ILD Project Services Limited | Professional & scientific | 2021 |
| ILG Arbroath Limited | Construction | 2019 |
| ILG Plumbing and Heating (Scotland) Limited | Construction | 2020 |
| ILM Halal Student Halls Limited | Professional & scientific | 2025 |
| ILM Hospitality Limited | Hospitality | 2023 |
| ILR Construction Ltd | Mining & quarrying | 2026 |
| Imageneer Ltd | Wholesale & retail | 2025 |
| Imagepixel Limited | Information & communication | 2023 |
| Imak Consultants Ltd | Other services | 2024 |
| IMC Energy Ltd | Professional & scientific | 2023 |
| Imca Engineering Ltd | Construction | 2024 |
| Imexa Construction L.P. | | 2015 |
| Immaginare Limited | Professional & scientific | 2011 |
| IMP Mortgage & Protection Advice Ltd | Financial services | 2014 |
| Impact Plastering & Roughcasting Services Ltd | Construction | 2011 |
| Impartial Financial Solutions Dundee LLP | | 2013 |
| Impexcroft L.P. | | 2015 |
| Importcredit L.P. | | 2015 |
| Improvise Systems Ltd | Professional & scientific | 2016 |
| Impulse Wholesale Ltd | Wholesale & retail | 2024 |
| Imteco Limited | Professional & scientific | 2013 |
| Imtex Limited | Real estate | 2007 |
| IN Home Displays Limited | Manufacturing | 2012 |
| IN Motion Theatre Company Ltd | Arts & recreation | 2017 |
| IN Residence Cafe Ltd | Hospitality | 2017 |
| Inchcape Joinery Ltd | Construction | 2026 |
| Inchcolm Private Hire Ltd | Transport & logistics | 2017 |
| Inchtay Furnished Apartments Ltd | Hospitality | 2025 |
| Inclusive Development Consulting Ltd | Professional & scientific | 2019 |
| Inclusivetech Scotland Ltd | Information & communication | 2024 |
| Independent Accessible Storage Limited | Real estate | 2023 |
| Independent Insurance Information Limited | Financial services | 1986 |
| Independent Mobile Phone Consultants Limited | Information & communication | 2006 |
| Independent Motor Vehicle Assessors Limited | Wholesale & retail | 2020 |
| Independent Vent Ltd | Construction | 2025 |
| Indexo Accents LP | | 2017 |
| Indiana Spice Scotland Ltd | Extraterritorial | 2023 |
| Indigo North Berwick Ltd | Hospitality | 2018 |
| Indomax Express L.P. | | 2015 |
| Indulge Kitchens & Bathrooms Ltd | Construction | 2026 |
| Industry Services Limited | Construction | 2026 |
| Infinitas 2 Ltd | Real estate | 2015 |
| Infiniti Bathrooms Ltd | Construction | 2017 |
| Infinity Design Scotland Limited | Wholesale & retail | 2025 |
| Infinity Driveway Solutions Ltd | Construction | 2021 |
| Infinity Garden Solutions Ltd | Construction | 2019 |
| Infinity Gardens Ltd. | Other services | 2018 |