| HCI Holdings Limited | Financial services | 2021 |
| Heartbeat Dynamics Ltd | Health & social care | 2026 |
| Heartlands Industries Limited | Manufacturing | 2020 |
| Heartwork Services (Scotland) Ltd | Health & social care | 2021 |
| Heather Havens Limited | Real estate | 2026 |
| Heather Morton Ltd | Education | 2013 |
| Heatwave Site Services Limited | Construction | 2019 |
| Heatworks Stove and Cooker Centre Limited | Administrative & support | 2009 |
| Hell Yeah Home Ltd | Wholesale & retail | 2026 |
| Hendry Ramsay Waters (Worldwide) Limited | Agriculture & fishing | 2002 |
| Hepburn Group Ltd | Agriculture & fishing | 2022 |
| Here'Stheplan Limited | Professional & scientific | 2020 |
| Heritage Ecological Limited | Professional & scientific | 2021 |
| Hermanos Sweets Limited | Hospitality | 2025 |
| Herofix Ltd | Construction | 2026 |
| HG Marketing Ltd | Professional & scientific | 2021 |
| HG Oak Gardens Limited | Construction | 2023 |
| HHS Home Services Ltd | Professional & scientific | 2025 |
| Hidden Route Limited | Education | 2019 |
| High Fyfe Ltd | Information & communication | 2021 |
| High Side Ventures Ltd | Wholesale & retail | 2025 |
| High Stay Ltd | Hospitality | 2025 |
| Highland Construction Limited | Construction | 2019 |
| Highland Elements Limited | Construction | 2025 |
| Highland Fayre Limited | Wholesale & retail | 1985 |
| Highland Grove UK Ltd | Hospitality | 2023 |
| Highland Harth Group Ltd | Financial services | 2024 |
| Highland Hustle Ltd | Arts & recreation | 2014 |
| Highland Leisure Ltd | Hospitality | 2024 |
| Highland Workwear Limited | Wholesale & retail | 2025 |
| Highlander Cabins Limited | Hospitality | 2022 |
| Hill and Garden Ltd | Administrative & support | 2023 |
| Hilltop Leaf Ltd | Wholesale & retail | 2019 |
| Hine Eyecare Limited | Health & social care | 2014 |
| Hire Intelligence International Limited | | 2023 |
| Hire Intelligence PTY Ltd | | 1997 |
| HIS Contracts Ltd | Construction | 2013 |
| HIS Design Ltd | Wholesale & retail | 2013 |
| Hodge Solicitors LLP | | 2004 |
| Home Electrical Services (Scotland) Limited | Construction | 2025 |
| Home Heating Property Services Ltd | Real estate | 2026 |
| Home Heating Services & Repairs Limited | Construction | 2020 |
| Home Heating Services (Scotland) Ltd | Construction | 2014 |
| Home Renewable Design Services Limited | Professional & scientific | 2026 |
| Home-Start Perth and Kinross Ltd | Health & social care | 2004 |
| Homescape (Perth) Limited | Administrative & support | 2016 |
| Hometrust Care Limited | Health & social care | 2003 |
| Hoolie Consulting Limited | Professional & scientific | 2019 |
| Horne Developments Ltd | Construction | 2023 |
| Horsecross Arts Limited | Arts & recreation | 2006 |
| Horsecross Trading Ltd | Hospitality | 1983 |
| Horsescotland | Arts & recreation | 2004 |
| Hospitality Skye Ltd | Financial services | 2026 |
| Hotel Operating Company Limited | Hospitality | 2025 |
| HTC Human Technologies Ltd. | Professional & scientific | 1994 |
| HTC Properties Limited | Real estate | 2012 |
| Huffman's Limited | Hospitality | 2016 |
| Humble Investment Group Limited | Financial services | 2024 |
| Humna Zohaib Limited | Wholesale & retail | 2025 |
| Humphreys Owen PTY Ltd | | 2023 |
| Hunt Scotland Ltd | Agriculture & fishing | 2022 |
| Hunter Partnership Ltd | Professional & scientific | 2022 |
| Hunting Tower Lodges Ltd | Hospitality | 2023 |
| Huntingtower Limited Liability Partnership | | 2008 |
| Huntingtower Properties Limited | Real estate | 2021 |
| Huntingtower Removals Limited | Transport & logistics | 2018 |
| Huntingtower Self Storage Ltd | Real estate | 2024 |
| Huntly Thomson Limited | Wholesale & retail | 2017 |
| Hurricane Communications Limited | Information & communication | 2001 |
| Hutchison Holdings (Scone) Ltd | Financial services | 2025 |
| Hutton Bars Limited | Hospitality | 2024 |
| Huttsport Ltd | Manufacturing | 2023 |
| HW Opals Ltd | Other services | 2023 |
| Hydro Electric Ltd | Professional & scientific | 2003 |
| Hydro Electric Pension Scheme Trustees Limited | Administrative & support | 2017 |
| Hydropower River Leven Ltd | Energy | 2018 |
| Hygiene Partners (OH) Limited | Health & social care | 2009 |
| Hylands Property Ltd | Real estate | 2019 |
| I & R Paton Limited | Construction | 2004 |
| I C Services Limited | Extraterritorial | 2002 |
| I K S (Developments) Ltd. | Construction | 2017 |
| I K S (Properties) Ltd. | Real estate | 2017 |
| I K S (Trading) Ltd. | Wholesale & retail | 2017 |
| I MAC Golf Ltd | Administrative & support | 2021 |
| I. & H. Brown Limited | Construction | 1964 |
| I. D. Murray Limited | Professional & scientific | 2020 |
| I.G.D.F. Consulting Ltd | Professional & scientific | 2026 |
| I.M.I.G. Car Wash & Valeting Services Perth Ltd | Administrative & support | 2024 |
| IAG Property Ltd | Real estate | 2023 |
| Iain Anderson Agencies Limited | Wholesale & retail | 2024 |
| IAN Bonthrone Building & Groundworks Ltd | Construction | 2018 |
| IAN H. Cameron Limited | Wholesale & retail | 1960 |
| IAN White Limited | Agriculture & fishing | 1982 |
| ID (Snowie) Holdings Ltd | Professional & scientific | 2021 |
| IDR INK Lover Ltd | Arts & recreation | 2024 |
| Idylltec Ltd | Information & communication | 2025 |
| IF Only Training & Consultancy Limited | Education | 2015 |
| Ignite Plumbing Heating Perth Ltd | Construction | 2024 |
| Ilashbymollyx Limited | Extraterritorial | 2024 |
| Ilift Scotland Ltd | Manufacturing | 2019 |