| Henderson Capital Holdings Limited | Financial services | 2026 |
| Henderson Optics Ltd | Professional & scientific | 2023 |
| Herbals-Are-Us Ltd | Hospitality | 2011 |
| Herd Properties Limited | Real estate | 2023 |
| Heritage Park Estates Ltd | Wholesale & retail | 2019 |
| Hero Properties Ltd | Real estate | 2003 |
| HH Foods Ltd | Hospitality | 2025 |
| Hi-Q Precision Engineering Ltd | Professional & scientific | 2023 |
| Hi-Spec Roofing Systems Ltd | Construction | 2017 |
| Higgins Haldane Ltd | Health & social care | 2020 |
| High Marketing & Recruitment Company Ltd | Administrative & support | 2014 |
| High Marketing Recruitment Limited | Administrative & support | 2023 |
| High Valleyfield Pharmacy Limited | Health & social care | 2002 |
| Highland Capital Ltd. | Financial services | 2003 |
| Highlane Food Ltd | Hospitality | 2019 |
| Hikari Properties Ltd | Real estate | 2026 |
| Hillend Community Land CIC | Administrative & support | 2024 |
| Hillend Holdings Ltd | Real estate | 2020 |
| Hillend Investments Limited | Real estate | 2006 |
| Hillersdon Heart Limited | Health & social care | 2018 |
| Hillstone Developments (Causewayside) Limited | Construction | 2015 |
| Himalayan YAK Delights Limited | Wholesale & retail | 2025 |
| Hinney Home Solutions Ltd | Real estate | 2025 |
| Hmfas Ltd | Hospitality | 2024 |
| HMS Auditing Services Ltd | Professional & scientific | 2018 |
| HO Chung Ltd | Hospitality | 2024 |
| Hoffmann Gray Homes Limited | Construction | 2025 |
| Hola! Coffee Ltd | Hospitality | 2024 |
| Holborn Bespoke Limited | Construction | 2025 |
| Holder Planning Ltd. | Professional & scientific | 2010 |
| Hole Shipper Limited | Wholesale & retail | 2025 |
| Homastudios Ltd | Wholesale & retail | 2025 |
| Home Entertainment Solutions Limited | Manufacturing | 2004 |
| Home Inc Ltd | Construction | 2020 |
| Home Investment Solutions Ltd | Real estate | 2018 |
| Home Renovations Scotland Ltd | Construction | 2019 |
| Homes in Focus Ltd | Real estate | 2013 |
| Homeslide Door Systems Ltd. | Construction | 2009 |
| Honeysuckle Taxis Limited | Professional & scientific | 2007 |
| Hope Hairdressing Limited | Other services | 2003 |
| Horne Capital Ltd | Financial services | 2025 |
| Hot Toddy Limited | Hospitality | 2023 |
| Hoteru Kojo Ltd | Professional & scientific | 2021 |
| HOU Yuan Ltd | Hospitality | 2025 |
| House of Ikigai Limited | Health & social care | 2020 |
| HSZ Cake Studio Ltd | Wholesale & retail | 2024 |
| Huga Holidays Ltd | Hospitality | 2022 |
| Human Designed Innovation Limited | Professional & scientific | 2025 |
| Humanist Society Scotland | Other services | 2011 |
| Hungrr Ltd | Hospitality | 2026 |
| Hunter Caird Ltd | Real estate | 2014 |
| Hunter Draughting Limited | Administrative & support | 2008 |
| Hybriddreich Ltd | Information & communication | 2021 |
| Hydraforce Ltd | Professional & scientific | 2026 |
| Hydraulic Pipefitting Ltd | Construction | 2023 |
| Hynds Properties Developments Ltd | Construction | 2025 |
| Hynds Properties Limited | Real estate | 2016 |
| Hyperprime Limited | Information & communication | 2026 |
| I Animal Health Limited | Professional & scientific | 2013 |
| I Know Some People Limited | Professional & scientific | 2020 |
| I S Harley (Castlandhill) | | 2000 |
| I-Legal Limited | Professional & scientific | 2024 |
| I.P.S Aloha (Scotland) Limited | Manufacturing | 2010 |
| I.V. Stirbu Ltd | Wholesale & retail | 2022 |
| IAN Averill Law Accountants Limited | Professional & scientific | 2012 |
| IAN Beveridge Electrical Services Ltd | Construction | 2017 |
| IAN Hodge Joiners Limited | Construction | 2004 |
| IAN Muir Delivery Ltd | Transport & logistics | 2026 |
| IAN O'Connor Project Services Ltd | Professional & scientific | 2020 |
| Ibrahussa Ltd | Wholesale & retail | 2025 |
| Ice Factor GP Ltd | Arts & recreation | 2014 |
| Ice Factor International Ltd. | Administrative & support | 2008 |
| ID Agencies Limited | Wholesale & retail | 2015 |
| IFO Shopfitting Ltd | Construction | 2015 |
| IGA Solutions Ltd | Information & communication | 2019 |
| Igar Garden Maintenance Services Limited | Administrative & support | 2024 |
| Ignite TV Community Interest Company | Information & communication | 2018 |
| Iiwas Ltd | Professional & scientific | 2023 |
| Ijkm Properties Limited | Real estate | 2021 |
| Illam House Ltd | Hospitality | 2026 |
| IM Production UK (Group) Limited | Wholesale & retail | 2019 |
| Imgs Media Ltd | Information & communication | 2024 |
| Import Games Ltd | Information & communication | 2022 |
| Impulse Cable Services Ltd | Energy | 2024 |
| IN Developments Limited | Construction | 2008 |
| IN Haus Collaboration Ltd | Manufacturing | 2026 |
| In-Site Property Solutions Limited | Real estate | 2006 |
| Inchcolm Holdings Limited | Financial services | 2025 |
| Inchcolm Veterinary Services Limited | Professional & scientific | 2003 |
| Inchwood Ltd | Real estate | 2020 |
| Inclusive Games UK Ltd | Wholesale & retail | 2025 |
| Incontri Limited | Hospitality | 2015 |
| Incredible IT Business Ltd | Information & communication | 2026 |
| Independent Legal Advice Within Scotland Limited | Professional & scientific | 2024 |
| Indri Records Ltd | Information & communication | 2025 |
| Industrial Systems and Control Limited | Information & communication | 1987 |
| Indylo Ltd | Information & communication | 2026 |
| Inferry Forestry Limited | Agriculture & fishing | 2024 |
| Infilm Trading Limited | Wholesale & retail | 2025 |
| Infinite Heating Solutions Ltd | Construction | 2020 |