| Holavie Solutions Limited | Hospitality | 2020 |
| Holcon Ltd | Real estate | 2022 |
| Holland America Line Limited | | 2025 |
| Hollywood Nails C&D Ltd | Other services | 2025 |
| Hollywood Nails T&T Ltd | Other services | 2026 |
| Holm Limited | Hospitality | 2024 |
| Home Visiting Optics Ltd | Health & social care | 2021 |
| Homeheat Ltd | Construction | 2022 |
| Homesight Services Ltd | Health & social care | 2024 |
| Homic Care Ltd | Health & social care | 2025 |
| Honey BEE Scot Ltd | Other services | 2019 |
| Honeyskye Alphaglobal Limited | Health & social care | 2023 |
| Hook and Line Fishing Supplies Ltd | Wholesale & retail | 2025 |
| Hoot Desserts Ltd | Manufacturing | 2018 |
| Hope CBD Limited | Manufacturing | 2018 |
| Horizon Aviation Services Limited | Transport & logistics | 2017 |
| Horizon Rose Lily Ltd | Real estate | 2018 |
| Host. Play Cafe Ltd | Health & social care | 2025 |
| Hot Plate Ltd | Hospitality | 2026 |
| House of Caledonia Limited | Wholesale & retail | 2013 |
| House of Glenroy Limited | Wholesale & retail | 2020 |
| HPA Estates Limited | Real estate | 2024 |
| HR Hamilton Ltd | Hospitality | 2023 |
| Hrhs Consultancy Ltd. | Professional & scientific | 2008 |
| HRS Logistics Ltd | Transport & logistics | 2026 |
| HS Care Ltd | Health & social care | 2020 |
| HSK Property Investments Ltd | Real estate | 2022 |
| HST Plumbing & Heating Limited | Construction | 2020 |
| Hugh Logan Plant & Engineering Services Limited | Manufacturing | 1976 |
| Hunter Auto Engineers Limited | Wholesale & retail | 1994 |
| Hunter Mercury Ltd | Professional & scientific | 2018 |
| Hurry Couriers Limited | Transport & logistics | 2018 |
| HY Studios Limited | Arts & recreation | 2024 |
| Hyde Park Properties Limited | | 2023 |
| Hydro Project Solutions Ltd | Professional & scientific | 2015 |
| Hydrosun Limited | Extraterritorial | 2017 |
| Hyndland Home Ltd | Other services | 2023 |
| Hyndland Motor Company Ltd | Wholesale & retail | 2004 |
| Hyndland Motor Services (East Kilbride) Ltd | Wholesale & retail | 2021 |
| Hyzone Limited | Health & social care | 2002 |
| I AM Site Services Limited | Manufacturing | 2017 |
| I Compare for Business Limited | Other services | 2020 |
| I D Property Limited | Extraterritorial | 2011 |
| I Fell OFF Limited | Extraterritorial | 2018 |
| I&K Investments Ltd | Real estate | 2024 |
| I-Oven Limited | Administrative & support | 2012 |
| I.S.H Contractors Ltd | Construction | 2025 |
| Iamagiant Limited | Professional & scientific | 2021 |
| IAN Kenny Limited | Professional & scientific | 2003 |
| IAN Milne Group Limited | Information & communication | 2015 |
| IAN Picken Motor Engineer Limited | Wholesale & retail | 2017 |
| Ibby GAS Services Limited | Construction | 2025 |
| Icare at Home (East) Ltd | Health & social care | 2021 |
| Ice Box 85 Ltd | Health & social care | 2020 |
| Icevalley Gifts Ltd | Wholesale & retail | 2024 |
| Iclient Management Services Ltd | Professional & scientific | 2026 |
| Icon Automations Limited | Manufacturing | 2017 |
| Icss Technology Ltd | Professional & scientific | 2022 |
| Ideal Property Sourcing Ltd | Real estate | 2022 |
| Igloo (Scotland) Ltd | Real estate | 2007 |
| Ikon Entertainments Ltd | Other services | 2018 |
| ILI (Borders PSH) Limited | Real estate | 2017 |
| ILI (One) Ltd | Construction | 2005 |
| ILI (Security) Limited | Real estate | 2017 |
| ILI (Trossachs PSH) Limited | Real estate | 2017 |
| ILI Attalus Limited | Construction | 2025 |
| ILI Aurelius Limited | Construction | 2024 |
| ILI Cato Limited | Construction | 2024 |
| ILI Chrysippus Limited | Construction | 2025 |
| ILI Cleanthes Limited | Construction | 2024 |
| ILI Dalshannon PLC | Construction | 2008 |
| ILI Diogenes Limited | Construction | 2024 |
| ILI Energy Storage PLC | Construction | 2019 |
| ILI Epictetus Limited | Construction | 2024 |
| ILI Pump Storage Hydro P.L.C. | Real estate | 2017 |
| ILI Rufus Limited | Construction | 2024 |
| ILI Seneca Limited | Construction | 2024 |
| ILI Zeno Limited | Construction | 2024 |
| Ilmi Wholesale Ltd | Wholesale & retail | 2025 |
| IM CAM Ltd | Information & communication | 2025 |
| Impact Signs SCO Limited | Professional & scientific | 2024 |
| Imperium Security Global Ltd | Other services | 2025 |
| IN Colour Estates Ltd | Real estate | 2017 |
| Indellie Limited | Wholesale & retail | 2016 |
| Indigo Cost Consultancy Limited | Administrative & support | 2019 |
| Industrial Maintenance Engineering Services Ltd | Manufacturing | 2020 |
| Infinite INK Ltd | Other services | 2020 |
| Infinity Competitions Ltd | Arts & recreation | 2025 |
| Infoplex Ltd. | Information & communication | 1994 |
| Informa Middle East Limited | | 2014 |
| Informed Tree Services Ltd | Administrative & support | 2011 |
| Inframech Limited | Construction | 2024 |
| Initiate Clothing Limited | Wholesale & retail | 2018 |
| Inner Strength Gym Limited | Arts & recreation | 2025 |
| Innes Vets Ltd | Professional & scientific | 2014 |
| Innovo Properties Limited | Real estate | 2019 |
| Inspiral Graphics Limited | Other services | 2018 |
| Instant Images Limited | Professional & scientific | 2006 |
| Instantaneous Shop Limited | Wholesale & retail | 2024 |
| Integral Business Group Limited | Professional & scientific | 2015 |