| HI Scotland | Health & social care | 2023 |
| Highclere Hair Ltd | Other services | 2023 |
| Highland Style Living Ltd | Manufacturing | 2026 |
| Highlandhues Ltd | Wholesale & retail | 2026 |
| Highlands Apex Ltd | Wholesale & retail | 2026 |
| Highlands Plastering Services Ltd | Construction | 2023 |
| Hill Electrical Ltd | Construction | 2024 |
| Hill Mckie Holdings Ltd | Professional & scientific | 2010 |
| Hillcrawf Renovations Ltd | Real estate | 2025 |
| Hippo Tilt Ltd | Construction | 2019 |
| History Walk Tours Ltd. | Administrative & support | 2025 |
| HJH Solutions Ltd | Professional & scientific | 2025 |
| HKK Estates Ltd | Real estate | 2024 |
| Hkpa Properties Limited | Real estate | 2019 |
| HLD Garage Ltd | Wholesale & retail | 2023 |
| HMS 485 Properties Limited | Real estate | 2020 |
| HMS Barberry Limited | Real estate | 2021 |
| HMS Severn Limited | Real estate | 2021 |
| Hobi Goblin Limited | Wholesale & retail | 2003 |
| Hofmen Software Ltd | Information & communication | 2025 |
| Hogarth Consulting Ltd. | Professional & scientific | 2012 |
| Holehouse Property Company Limited | Real estate | 1973 |
| Holland Lettings Ltd | Real estate | 2026 |
| Holly Campbell Ltd | Wholesale & retail | 2022 |
| Home Fire Protection Scotland Ltd | Construction | 2019 |
| Home-Start Renfrewshire and Inverclyde | Health & social care | 2005 |
| Homeworld MH Ltd | Wholesale & retail | 2025 |
| Homezone Plus Limited | Wholesale & retail | 2018 |
| Honts Strategic Impact Ltd | Wholesale & retail | 2025 |
| Hope and Elliott Ltd | Other services | 2009 |
| Hopeful Spaces CIC | Health & social care | 2023 |
| Horizon Management Systems Limited | Administrative & support | 2019 |
| Horizon Photography Ltd | Wholesale & retail | 2017 |
| Horncroft Limited | Wholesale & retail | 1990 |
| Horse Energy Holdings Ltd | Agriculture & fishing | 2025 |
| Hoste Direct Limited | Information & communication | 2020 |
| Hote-El Apartments Ltd | Hospitality | 2019 |
| Hotelpilot Tech Ltd | Information & communication | 2025 |
| House of 12 Ltd | Professional & scientific | 2024 |
| Housesmart Properties Ltd | Real estate | 2023 |
| Houston Kiltmakers Limited | Wholesale & retail | 2019 |
| Howick Marketing Services Limited | Professional & scientific | 2009 |
| Howie Design Services Ltd | Construction | 2022 |
| HQ Carwash Paisley Ltd | Administrative & support | 2025 |
| HQ Wash Limited | Administrative & support | 2022 |
| HRS IT and Web Solutions Ltd. | Information & communication | 2019 |
| HS Traders Paisley Ltd | Wholesale & retail | 2023 |
| Huckleberry Inc Limited | Administrative & support | 2012 |
| HUE Pro Academy Ltd | Other services | 2023 |
| Humble Abode (Scotland) Ltd | Real estate | 2015 |
| Hummingbird OUT of School Care Limited | Other services | 2015 |
| Hurlet Films Ltd | Information & communication | 2024 |
| Hutchinson Maintenance Solutions Ltd | Other services | 2022 |
| Hutchison Law Limited | Professional & scientific | 2024 |
| Hutchison Law Property Limited | Real estate | 2025 |
| HV Property Clearance Limited | Administrative & support | 2012 |
| Hvsc Solutions Ltd | Construction | 2025 |
| HXY Couriers Ltd | Transport & logistics | 2025 |
| Hybrid Services (Scotland) Limited | Manufacturing | 2012 |
| Hydroluminum Scotland Limited | Manufacturing | 2024 |
| Hydrotest Ltd | Construction | 2009 |
| I D Contracts Scotland Ltd | Construction | 2010 |
| I D S Electrical Contractors Ltd | Construction | 2011 |
| I.T.M Advisors Ltd | Professional & scientific | 2020 |
| Iain Semple Chemicals Ltd | Wholesale & retail | 2015 |
| Iain Stewart Hairdressing Ltd | Other services | 2023 |
| IAN Adam Plastering Ltd | Construction | 2021 |
| IAN Allan Associates (UK) Limited | Professional & scientific | 2006 |
| IAN Kelly Planning Consultancy Limited | Professional & scientific | 2021 |
| IAN RAE Electrical Services Limited | Construction | 2014 |
| Ian&Ld Ltd | Construction | 2020 |
| IAT Facility Management Limited | Construction | 2023 |
| Icdriving Ltd | Transport & logistics | 2024 |
| ID Resilience Limited | Administrative & support | 2014 |
| IDS Electrical Services Limited | Construction | 2025 |
| IDS Group (Scotland) Limited | Construction | 2025 |
| IDS Holdings (Scotland) Limited | Financial services | 2025 |
| IDS Renewables Limited | Construction | 2025 |
| Ifca Resources Ltd | Real estate | 2022 |
| Ifinance Cars Limited | Financial services | 2016 |
| Ifit Auto Ltd | Wholesale & retail | 2022 |
| IG Valeting Limited | Administrative & support | 2021 |
| Iiteda Limited | Professional & scientific | 2020 |
| IJ Property Ltd | Real estate | 2015 |
| Ijeynoc Engineering Limited | Professional & scientific | 2022 |
| IK INT Ltd | Wholesale & retail | 2023 |
| IL Pescatore Trading Limited | Hospitality | 2024 |
| IL Restaurant Limited | Hospitality | 2026 |
| Ilika Consulting Group Limited | Professional & scientific | 2024 |
| IM Pipe Fitting Services Ltd | Extraterritorial | 2015 |
| Impact Digital Radio Limited | Extraterritorial | 2014 |
| Imports-Ant (UK) Trading Ltd | Wholesale & retail | 2020 |
| Inarcova Ltd | Wholesale & retail | 2025 |
| Independent Financial Advice Centre (Glasgow) Limited | Administrative & support | 2007 |
| Independent First (Mortgages) Limited | Administrative & support | 2001 |
| Independent First Limited | Financial services | 2001 |
| Indevar Ltd. | Professional & scientific | 2011 |
| India Inn Ltd | Hospitality | 2026 |
| Indian Scene Cuisine Limited | Hospitality | 2013 |
| Indigo Food Solutions Ltd | Manufacturing | 2019 |