| HR223 Engineering Ltd | Professional & scientific | 2024 |
| HTJ Commercial Services Ltd | Professional & scientific | 2025 |
| Hunter Freelance Limited | Administrative & support | 2005 |
| Hydro Siphon Limited | Construction | 2009 |
| IBT Travel Limited | Administrative & support | 2006 |
| Icert[Scotland] Ltd | Professional & scientific | 2023 |
| ID Holdings (Scotland) Ltd | Professional & scientific | 2026 |
| Igkg Consultants Limited | Administrative & support | 2011 |
| IMT Aviation Scotland Limited | Manufacturing | 2004 |
| IMT Scotland Holdings Limited | Financial services | 2023 |
| Incident Free Operations Ltd | Administrative & support | 2008 |
| Infinity Allstars Ltd | Arts & recreation | 2022 |
| Infinity Digital Solutions Ltd | Professional & scientific | 2019 |
| Ingen Engineering Limited | Administrative & support | 2003 |
| Innovatus Technologies Limited | Professional & scientific | 2018 |
| Inspired Vision Bathrooms & Wetrooms Ltd | Wholesale & retail | 2018 |
| Inter-Tec Services Limited | Professional & scientific | 1991 |
| Interflex (UK) Limited | Administrative & support | 2005 |
| Interliminal Ltd | Information & communication | 2025 |
| International Oilfield Services Ltd | Mining & quarrying | 2016 |
| Inventeq Solutions Limited | Information & communication | 2008 |
| Inverops Limited | Professional & scientific | 2018 |
| IR35 Buddy Limited | Professional & scientific | 2013 |
| ISD Associates Ltd | Real estate | 2022 |
| Islands Property Ltd | Real estate | 2026 |
| Isle of Pladda Limited | Hospitality | 2024 |
| Isle Project Services Ltd | Administrative & support | 2001 |
| Istic Limited | Professional & scientific | 2004 |
| ITW4 Limited | Administrative & support | 2010 |
| J Bailey Productions Ltd | Arts & recreation | 2023 |
| J Morrison Engineering Ltd | Construction | 2016 |
| J Smith Exterior Cleaning Ltd | Administrative & support | 2026 |
| James Harper Electrical Limited | Construction | 2003 |
| James Mitchell & SON Ltd. | Agriculture & fishing | 2004 |
| Jamesbrown Group Ltd | Professional & scientific | 2024 |
| JAW Consulting Ltd | Real estate | 2008 |
| JC Aerostructures Ltd | Manufacturing | 2022 |
| JCQ Goods Ltd | Wholesale & retail | 2025 |
| JDH7 Limited | Administrative & support | 2012 |
| Jewel Fashion House Ltd | Manufacturing | 2025 |
| JF Property Developments Ltd | Construction | 2025 |
| Jhme Consultants Limited | Administrative & support | 2010 |
| JJT Enterprises Ltd | Wholesale & retail | 2011 |
| Jkcb Property Ltd | Real estate | 2025 |
| Jogo Futures Ltd | Real estate | 2023 |
| John Gilmour & Co. (Metal Workers) Limited | Manufacturing | 1973 |
| Johnston Engineering Services Limited | Administrative & support | 2008 |
| Jqinternational Ltd | Health & social care | 2017 |
| Jssk Retail Ltd | Wholesale & retail | 2022 |
| JT Completions Limited | Administrative & support | 2012 |
| Judy Laing Fashions Limited | Wholesale & retail | 2005 |
| Julia.M Fishing Limited | Agriculture & fishing | 2004 |
| Juniper Financial Planning Ltd | Financial services | 2023 |
| K & M Electrical Limited | Construction | 2018 |
| KB Body Sculpt Ltd | Other services | 2023 |
| KBM Heavy Diesel Mechanics Ltd | Professional & scientific | 2024 |
| KD Cass Ltd | Other services | 2026 |
| Keir Air Ltd. Ltd | Manufacturing | 2026 |
| Kerr Tutoring Services Limited | Education | 2014 |
| Kestrel Inns Limited | Hospitality | 1996 |
| Kevin Knott Consulting Ltd | Administrative & support | 2020 |
| Kilmurry Clinics Limited | Health & social care | 2009 |
| Kingett Property Development Ltd | Real estate | 2025 |
| Kinneff Resources Ltd | Real estate | 2011 |
| Kintyre Investment Partners Limited | Financial services | 2019 |
| Kirkoswald Holdings Limited | Real estate | 2017 |
| Kirkoswald Limited | Information & communication | 2007 |
| Kizuna Global Limited | Professional & scientific | 2025 |
| Kkea Property Limited | Real estate | 2025 |
| Kmbs Project Consulting Ltd | Professional & scientific | 2025 |
| KRB Property Investment Ltd | Real estate | 2026 |
| Kvcayr Limited | Construction | 2010 |
| KW Management Consultancy Ltd | Administrative & support | 2020 |
| L Hodgkin Design Limited | Administrative & support | 2006 |
| L K Design Limited | Construction | 2011 |
| L&D Financial Limited | Financial services | 2011 |
| L.I.C Engineering Limited | Administrative & support | 2007 |
| Laird Erskine & Company Limited | Agriculture & fishing | 1975 |
| Lairfad Engineering Services Ltd | Professional & scientific | 2011 |
| Lamberton Autocare Limited | Wholesale & retail | 2015 |
| Lanico Property Management Limited | Real estate | 2021 |
| Lattice Lines Limited | Administrative & support | 2013 |
| LDE Consultants Ltd. | Professional & scientific | 2015 |
| Leo's Box | Other services | 2017 |
| Let's Looc @ the Hub CIC | Education | 2022 |
| Lime Green Estate Agents Limited | Real estate | 2015 |
| Link Holdings Scotland Limited | Financial services | 2022 |
| Link Management Services UK Ltd | Other services | 2017 |
| Little Heaven Nail Bar Ltd | Other services | 2024 |
| Litton Textile Engineering Ltd | Professional & scientific | 2022 |
| LMD (UK) Ltd | Wholesale & retail | 2014 |
| Loans Community Centre Ltd | Other services | 2010 |
| Local Convenience Hub Ltd | Wholesale & retail | 2023 |
| Lochtech Two Limited | Real estate | 2001 |
| Lomond Estate Agents Limited | Real estate | 2005 |
| Lomond Property (Kilmarnock) Limited | Real estate | 2022 |
| Lomond Property Group Limited | Financial services | 2026 |
| Lomond Property Limited | Real estate | 2011 |
| LOX Property Limited | Real estate | 2021 |
| LP North Twelve Limited | Wholesale & retail | 2023 |