| IFB Services Ltd | Administrative & support | 2017 |
| IN Reach Scaffolding Ltd | Construction | 2024 |
| Infinity Commercial and Domestic GAS Ltd | Administrative & support | 2019 |
| Innovvares Ltd | Professional & scientific | 2019 |
| Interiors by Perfect Kitchens Limited | Wholesale & retail | 2025 |
| Inver Rigging Ltd | Administrative & support | 2019 |
| ISY Scaffolding Ltd | Construction | 2022 |
| It's Made UP Ltd | Arts & recreation | 2023 |
| Ivar Black Agencies Limited | Wholesale & retail | 2003 |
| Ixxam Electrical Ltd | Construction | 2026 |
| J Alexander Plant Hire Limited | Construction | 2003 |
| J Paton Plumbing & Heating Ltd | Construction | 2015 |
| J-Spec Property Ltd | Real estate | 2024 |
| J-Spec Scotland LLP | | 2021 |
| Jagga Brothers Limited | Hospitality | 2022 |
| JB Property Solutions Scotland Ltd | Construction | 2026 |
| JC & LM Limited | Financial services | 2011 |
| JCE Commercial Limited | Real estate | 2023 |
| JDW Contractors Limited | Construction | 2025 |
| Jennifer Reeves Hair Ltd | Other services | 2024 |
| JF Consulting and Coaching Ltd | Professional & scientific | 2020 |
| JGT Services Ayrshire Ltd | Wholesale & retail | 2023 |
| JH Packaging & Logistics Limited | Administrative & support | 2025 |
| JKM Services Dalry Ltd | Construction | 2023 |
| JMW Largs Ltd | Administrative & support | 2018 |
| JNJ ADI Dual Control Hire Limited | Administrative & support | 2025 |
| Jock Bros Ltd | Agriculture & fishing | 2019 |
| JR Contractors Scotland Limited | Construction | 2014 |
| K Mcgreal Limited | Other services | 2017 |
| KA Fenwick Limited | Hospitality | 2026 |
| KB Aero Tech Ltd. | Manufacturing | 2015 |
| KCR Academy Ltd | Education | 2021 |
| KCR Academy Training Ltd | Education | 2023 |
| KEM Elec Limited | Construction | 2019 |
| Keresley Properties Ltd | Construction | 2020 |
| Kerrzo Limited | Administrative & support | 2019 |
| KG Builders & Sons Ltd | Construction | 2019 |
| Kinetic Chain Release Limited | Other services | 2019 |
| Konexon Ltd | Information & communication | 2013 |
| Kronical Ltd. | Wholesale & retail | 2021 |
| KTA Contracts Limited | Administrative & support | 2023 |
| LA4TY Ltd | Wholesale & retail | 2022 |
| Laigh Baidland Escapes Ltd | Administrative & support | 2018 |
| Laurel Homes Limited | Construction | 1987 |
| LD Business Development Limited | Administrative & support | 2017 |
| Lemirl Limited | Water & waste | 2000 |
| Lennox NPD Ltd | Administrative & support | 2020 |
| Linn Events and Services Limited | Administrative & support | 2018 |
| Linn Marketing Ltd | Administrative & support | 2018 |
| Local Shop Dalry Ltd Ltd | Wholesale & retail | 2025 |
| Lockeroo Ltd | Wholesale & retail | 2019 |
| Lolaire Properties Ltd | Real estate | 2024 |
| Lollipop Boutique Glasgow Ltd | Wholesale & retail | 2019 |
| Lollipop Land Ltd | Arts & recreation | 2018 |
| Loop Consulting Limited | Professional & scientific | 2010 |
| Lothian Communications Limited | Other services | 1990 |
| LSR Process Limited | Construction | 2016 |
| M J M Bawa Limited | Real estate | 2013 |
| M Thomson Ltd | Hospitality | 2016 |
| Macphail Sports Recovery Ltd | Health & social care | 2026 |
| Macthomas Homes Ltd | Real estate | 2019 |
| Magilton Haulage Limited | Transport & logistics | 2015 |
| Magnificent Health Care Services Ltd | Health & social care | 2026 |
| Marchburn BP Ltd | Real estate | 2016 |
| Mark's Barbers Ltd | Other services | 2025 |
| Marley Offshore Limited | Professional & scientific | 2018 |
| Mathew Hunter Properties Limited | Real estate | 2008 |
| Maybole Developments Ltd | Construction | 2020 |
| Mbeq Consulting Limited | Agriculture & fishing | 1998 |
| MC Marine Fabrication Ltd | Manufacturing | 2023 |
| Mcbride Construction Ayrshire Ltd | Construction | 2025 |
| MCC Powder Coatings Ltd | Construction | 2020 |
| MCC Powdercoating & Blasting Ltd | Construction | 2025 |
| Mcdonald Nitrogen Process Services Ltd | Construction | 2014 |
| Mcewen Services Ltd | Mining & quarrying | 2023 |
| Mcghie Motors Limited | Administrative & support | 2022 |
| Mctaggart Civils Limited | Construction | 2008 |
| Mctaggart Construction Limited | Construction | 1965 |
| Mctaggart Group Holdings Limited | Financial services | 2021 |
| Mctaggart Group Limited | Construction | 2007 |
| Mctaggart Vets Limited | Professional & scientific | 2010 |
| Mearns Maintenance Ltd | Other services | 2025 |
| Middle Realm Productions Ltd | Construction | 2016 |
| Middlepart Academy Limited | Information & communication | 2023 |
| Millour Hill Farming Ltd | Energy | 2014 |
| Mitreline Construction Limited | Construction | 2025 |
| Mjcc Consultancy Limited | Administrative & support | 2011 |
| ML ENG Ltd | Professional & scientific | 2023 |
| MM Developments Scotland Ltd | Construction | 2023 |
| Montside Limited | Real estate | 2008 |
| Mosside Holdings Ltd | Real estate | 2025 |
| Mstronic Europe Limited | Wholesale & retail | 2012 |
| MTB Electrical Scotland Limited | Construction | 2026 |
| MTM Apex Logistics Ltd | Transport & logistics | 2025 |
| MTM Express Ltd | Transport & logistics | 2026 |
| Muir Roofing Limited | Construction | 2023 |
| MW Offshore and Industrial Rope Services Ltd | Construction | 2018 |
| Natures Retort Ltd | Agriculture & fishing | 2024 |
| Neil Macleod (Prints & Enterprises) Limited | Information & communication | 1985 |
| Neptune Information Systems Ltd | Information & communication | 2020 |