| JC Holdings (Scot) Limited | Professional & scientific | 2024 |
| JCP Networks Ltd | Information & communication | 2025 |
| JDF Trading Ltd | Construction | 2026 |
| JF Trading Ltd | Construction | 2016 |
| JHS Concepts Ltd | Other services | 2020 |
| JKD Consultancy Limited | Other services | 2015 |
| Jlmm Limited | Hospitality | 2019 |
| JM Services (Scotland) Limited | Manufacturing | 2006 |
| Jmas (Scotland) Ltd | Professional & scientific | 2014 |
| JMD Plumbing & Heating Limited | Construction | 2016 |
| John Gardiner Environmental Services Limited | Wholesale & retail | 1953 |
| Jomar Developments (Scotland) Limited | Construction | 2024 |
| JSM Logistics Management (Stonehouse) Ltd | Professional & scientific | 2017 |
| Juniors Ltd | Professional & scientific | 2024 |
| JYN Studio Limited | Wholesale & retail | 2026 |
| K & M Building Preservations Limited | | 1982 |
| K a Facilities Management Ltd | Administrative & support | 2024 |
| K&G Barbers Limited | Other services | 2023 |
| Kamcb Ltd | Households | 2025 |
| KCL Developments Ltd | Construction | 2016 |
| KDC Contracts Ltd | Construction | 2024 |
| Kdcs Contracts Ltd | Real estate | 2025 |
| Keir Hardie Store Ltd | Wholesale & retail | 2021 |
| Kerr Investments (Scot) Limited | Real estate | 2023 |
| Kerr Nisbet Holdings Limited | Professional & scientific | 2011 |
| Kimberley (Scotland) Limited | Real estate | 2014 |
| Kinetic Machine Tool Service & Repair Ltd | Manufacturing | 2009 |
| Kintore Investments Limited | Real estate | 2026 |
| Kirk Hendry Joiners Ltd | Construction | 2023 |
| KJB Housing Ltd | Real estate | 2015 |
| KK Seran Ltd | Wholesale & retail | 2021 |
| Kmac (Scotland) Ltd | Hospitality | 2021 |
| KO Accountancy Services Limited | Professional & scientific | 2014 |
| Kobe HGV Ltd | Transport & logistics | 2024 |
| Koolkid Music Limited | Information & communication | 2019 |
| Kpfit&Well Limited | Other services | 2025 |
| KPW Groundworks Limited | Construction | 2026 |
| Krishna & Traders Ltd | Wholesale & retail | 2022 |
| Krsna Raag Ltd | Wholesale & retail | 2023 |
| KWM Plumbing & Heating Limited | Construction | 2014 |
| L FOY & Sons Ltd | Administrative & support | 2024 |
| L&J Couriers Limited | Transport & logistics | 2016 |
| L&Sjoineryandbuildingservices Ltd | Construction | 2026 |
| Lablik Homes Limited | Construction | 2001 |
| Lachowicz Urban Properties Ltd | Real estate | 2023 |
| Lafferty Properties Ltd | Real estate | 2025 |
| Lanarkshire Building Supplies Limited | Wholesale & retail | 2023 |
| Lanarkshire Cars and Commercials Ltd | Wholesale & retail | 2024 |
| Lanarkshire Electrical Services Ltd | Construction | 2024 |
| Lanarkshire Property Management Ltd. | Administrative & support | 2007 |
| Lanarkshire Stoves Ltd | Construction | 2015 |
| Land Compass Limited | Information & communication | 2013 |
| Larkhall & District Volunteer Group | Administrative & support | 2000 |
| Larkhall Community Growers | Agriculture & fishing | 2010 |
| Larkhall Retail Ltd | Wholesale & retail | 2026 |
| Larkhall Supplements Limited | Wholesale & retail | 2026 |
| Larkhall Taxi's Ltd | Information & communication | 2024 |
| Larkhall Times Ltd | Hospitality | 2026 |
| Larkhall Van Centre Ltd | Wholesale & retail | 2017 |
| Laudrup Limited | Wholesale & retail | 2020 |
| Laura Lamont Aesthetics Ltd | Health & social care | 2017 |
| Laurdam Investments Limited | Real estate | 2009 |
| Laverock Landscapes Ltd | Professional & scientific | 2026 |
| Laxpermit Limited | Hospitality | 2023 |
| LC Katarzia Tattoo Ltd | Arts & recreation | 2017 |
| LD Roof Care Ltd | Construction | 2023 |
| LDH Roofing Ltd | Construction | 2026 |
| LEA Myles Ltd | Professional & scientific | 2026 |
| LEAN2 Joinery Ltd | Construction | 2023 |
| Lesmahagow Self Storage Ltd | Real estate | 2017 |
| LET Link (Bathgate) Ltd | Real estate | 2016 |
| Letserv Limited | Construction | 2023 |
| LFM Travel Limited | Transport & logistics | 2025 |
| LGM Fitness Ltd | Hospitality | 2019 |
| Liliana Limited | Transport & logistics | 2025 |
| Linx Online Limited | Information & communication | 2011 |
| Littlest Events Limited | Administrative & support | 2025 |
| LJB Sunrooms Ltd | Construction | 2015 |
| Localeyes Optometrists Limited | Health & social care | 2002 |
| LS Construction Services Ltd | Construction | 2025 |
| LS SMP (Scotland) Ltd | Other services | 2026 |
| LS SMP Ltd | Other services | 2023 |
| Lukas Solar Services Ltd | Construction | 2022 |
| Luxe Layer Supply Ltd | Wholesale & retail | 2025 |
| Lynch Home Improvements Limited | Wholesale & retail | 2013 |
| M & C Landscaping Limited | Administrative & support | 2020 |
| M & C Properties (Stewarton) Limited | Real estate | 2023 |
| M & G Rail Ltd | Transport & logistics | 2018 |
| M GAS Installations Ltd | Construction | 2017 |
| M Smith Fencing Ltd | Construction | 2021 |
| M&E/Meica Construction Services Ltd | Construction | 2023 |
| M&H Detailing Ltd | Administrative & support | 2026 |
| M-Tech Electrical (GB) Limited | Construction | 2012 |
| M. Lewis Consultancy Ltd | Professional & scientific | 2023 |
| M.C.M Cleaning Solutions Ltd | Administrative & support | 2023 |
| Maacck Ltd | Construction | 2024 |
| Mackenzie Solar Installations Ltd | Construction | 2025 |
| Maclaren Healthcare Ltd | Administrative & support | 2023 |
| Maclaren Holdings (Scotland) Ltd | Professional & scientific | 2024 |
| Maclaren Homecare Ltd | Health & social care | 2024 |