| Hairstyle Troon Ltd | Other services | 2022 |
| Harling Consultants Limited | Professional & scientific | 2023 |
| Hayme Architecture & Design Ltd | Professional & scientific | 2020 |
| Heggie Engineering Limited | Professional & scientific | 2015 |
| Hensikt Consulting Limited | Professional & scientific | 2021 |
| Heritage Golf Tours Ltd | Administrative & support | 2021 |
| Heuroc Lotech Limited | Professional & scientific | 2021 |
| Highgrove House Hotel Ltd | Hospitality | 2005 |
| Highlander Property Limited | Administrative & support | 2018 |
| Highlander Security Systems Ltd. | Administrative & support | 2016 |
| Highlands Pride Ltd. | Manufacturing | 2007 |
| Hols in One Ltd | Administrative & support | 2025 |
| Holt's Garage Services Ltd | Wholesale & retail | 2017 |
| Human Edge Ltd | Administrative & support | 2025 |
| Hung Nails Ltd | Other services | 2025 |
| IAN Hitchman Fabrications Limited | Manufacturing | 1976 |
| IB Cameron Ltd | Hospitality | 2024 |
| IBT Transport Limited | Administrative & support | 1996 |
| ICARE2 Property Limited | Real estate | 2014 |
| ICARE3 Property Limited | Real estate | 2017 |
| ICM7 Ltd | Financial services | 2019 |
| Iconic Cosmetics Ltd | Other services | 2025 |
| Infinite Indulgence Ltd | Wholesale & retail | 2024 |
| Insight Pitch Media Ltd | Information & communication | 2026 |
| Inspiring Bathroom Solutions & Distribution Limited | Wholesale & retail | 2018 |
| Inter Dependent Purchasing Limited | Wholesale & retail | 2005 |
| Ismart Property Group Ltd | Real estate | 2020 |
| J Conway Gardening Services Ltd | Professional & scientific | 2025 |
| Jack Nicolson Access Ltd | Construction | 2022 |
| Jacqueline Ross Spa Consultancy Limited | Other services | 2008 |
| James Caldwell Golf Ltd | Wholesale & retail | 2024 |
| James Caldwell Limited | Professional & scientific | 2012 |
| JAN DE Vries Holdings Limited | Administrative & support | 2002 |
| Janus Medical Limited | Health & social care | 2022 |
| Jaxaco Ltd | Arts & recreation | 2022 |
| Jaydee Joiners Limited | Construction | 2001 |
| JD& ED Property Ltd | Real estate | 2018 |
| Jebb Ltd | Real estate | 2025 |
| Jennifer Agnes Dick Properties Limited | Real estate | 2019 |
| JET Water Services Ltd. | Administrative & support | 2010 |
| JHD Property Management Ltd | Households | 2026 |
| Joam Properties Ltd | Real estate | 2024 |
| John Dawson Butchers Limited | Wholesale & retail | 2003 |
| Joshuadaviesaeroservices Ltd | Manufacturing | 2026 |
| Jusher Holdings Ltd | Financial services | 2025 |
| Jusher Limited | Construction | 2005 |
| Kaem Properties Ltd | Real estate | 2026 |
| KAM Assets Ltd | Real estate | 2025 |
| KDC Engineering Inspection Services Limited | Professional & scientific | 2026 |
| Kebab Villa Ltd | Wholesale & retail | 2022 |
| KEN LEE Psychotherapy Ltd | Health & social care | 2024 |
| KEN Rolph Limited | Professional & scientific | 2016 |
| Kilmardinny 74 Limited | Health & social care | 2015 |
| Kitesurf Scotland Ayrshire Limited | Education | 2021 |
| Kitesurf Scotland Watersports Limited | Wholesale & retail | 2021 |
| KNK Property Ltd. | Real estate | 2013 |
| Komo Consultancy Ltd | Administrative & support | 2017 |
| Ksem Aircraft Engineering Limited | Extraterritorial | 2025 |
| KSM Enterprises Ltd | Professional & scientific | 2012 |
| Kyria Limited | Administrative & support | 2016 |
| L'S Little Stars Limited | Health & social care | 2023 |
| LA Consultants Ltd. | Professional & scientific | 2008 |
| LBJ HR Limited | Administrative & support | 2018 |
| Lesley Mcdonald Hair and Beauty Ltd | Other services | 2010 |
| LFM Mechanical Maintenance Limited | Manufacturing | 2017 |
| Liam Gerrie Ltd | Construction | 2024 |
| Listed Estate Agents Ltd | Real estate | 2024 |
| LMG Systems Solutions Ltd | Energy | 2022 |
| Loch Guard Ltd | Construction | 2023 |
| Lochgreen House Hotel Ltd | Hospitality | 2003 |
| Lochs Kitchen Ltd | Hospitality | 2024 |
| Lonie Property Ltd | Real estate | 2025 |
| LOOK2 Services Limited | Manufacturing | 2018 |
| Lunan Medical Limited | Health & social care | 2017 |
| M.J. Structural Design Limited | Mining & quarrying | 2018 |
| M.P. Insulations Ltd. | Manufacturing | 2012 |
| MAC Asphalt (Scotland) Ltd | Construction | 2019 |
| MAC Asphalt Limited | Construction | 1994 |
| Macleod Heilan Tours Limited | Transport & logistics | 2022 |
| Maggies Kitchen Ltd | Hospitality | 2023 |
| Maloney Holdings Ltd | Hospitality | 2025 |
| Mantle Clothing Ltd | Wholesale & retail | 2022 |
| MAP Central Florida Property Investments I Limited Partnership | | 2011 |
| MAP Central Florida Property Investments II Limited Partnership | | 2011 |
| MAP Enrolment Solutions Ltd | Financial services | 2013 |
| MAP Link (UK) Ltd. | Financial services | 2005 |
| MAP Premier Ltd. | Financial services | 2005 |
| MAR Engineering Consultants Limited | Other services | 2017 |
| Marr RFC Limited | Arts & recreation | 2019 |
| Martin & Sons Electrical Ltd | Manufacturing | 2024 |
| Masn Ltd | Hospitality | 2024 |
| MCA Tech Limited | Professional & scientific | 2025 |
| Mcclung Electrical Ltd | Construction | 2025 |
| Mcgarrity Consultancy Ltd | Health & social care | 2021 |
| Mckays Troon Ltd | Hospitality | 2025 |
| Mckenzie Health Limited | Administrative & support | 2025 |
| Mckinnell Solutions Ltd | Information & communication | 2024 |
| Mclaren Travel Concierge Ltd | Transport & logistics | 2015 |
| MCO Homes Ltd | Real estate | 2020 |
| Meadowgreen Healthcare Limited | Wholesale & retail | 2012 |