| Klick Ltd | Professional & scientific | 2025 |
| L & L Inspections Ltd | Professional & scientific | 2012 |
| L J Cook (Joiner) Ltd. | Construction | 2006 |
| LCE Highland Ltd | Professional & scientific | 2013 |
| Leah Grace Creations Ltd | Arts & recreation | 2024 |
| Leavesley Consulting Ltd | Professional & scientific | 2016 |
| LEE Edwardson Engineering and Surveying Services Ltd | Professional & scientific | 2012 |
| Leem Property Limited | Real estate | 2020 |
| Leuven Inventory Management Limited | Wholesale & retail | 2019 |
| LH IV12 Limited | Hospitality | 2026 |
| LI CAO Limited | Extraterritorial | 2019 |
| Lifemed Community Ltd | Health & social care | 2024 |
| LIL Beatz Inverness Ltd | Arts & recreation | 2021 |
| Lindsay Cameron & SON Ltd | Construction | 2024 |
| Lister Square (NO 207) Limited | Professional & scientific | 2014 |
| Ljack Consultancy Ltd | Professional & scientific | 2023 |
| LMB Falcons Ltd | Agriculture & fishing | 2022 |
| Lmbd Ltd | Other services | 2019 |
| LN Lounge Limited | Wholesale & retail | 2025 |
| Local Artisan Catering Limited | Hospitality | 2026 |
| Locasta Ltd | Hospitality | 2023 |
| Loch Ness Furniture & Upholstery Limited | Wholesale & retail | 2022 |
| Lossie Restaurant Ltd | Hospitality | 2016 |
| Lossie Tandoori Restaurant Ltd | Hospitality | 2019 |
| LOW Waters Developments Ltd | Real estate | 2003 |
| Lucky House 53 Limited | Hospitality | 2021 |
| M Distributions Limited | Wholesale & retail | 2025 |
| M J Anniss Ltd | Information & communication | 2014 |
| M.Schneider Electrical Ltd | Agriculture & fishing | 2025 |
| Macdonald Industries Limited | Financial services | 2026 |
| Macdrinks Ltd | Manufacturing | 2021 |
| Macgillivray Construction Ltd | Construction | 2016 |
| Macinver Ltd | Construction | 2025 |
| Mackay Creative Limited | Professional & scientific | 2025 |
| Mackay Wind Services Ltd | Professional & scientific | 2023 |
| Mackenzie Joinery Services Limited | Construction | 2019 |
| Maclellan Lettings Limited | Hospitality | 2024 |
| Maclellan Plumbing & Heating Limited | Construction | 2013 |
| Macleman Holdings Ltd | Financial services | 2019 |
| Macleman Wealth Ltd | Financial services | 2005 |
| Maclennan Building & Roofing Ltd | Construction | 2011 |
| Maclennan P & H Services Ltd | Construction | 2022 |
| Macleod Catering Consultancy Ltd | Hospitality | 2018 |
| Macleod Landscapes Ltd | Administrative & support | 2026 |
| Makes by Megs Ltd | Manufacturing | 2022 |
| Malcolm M. Grant (Pitgrudy) | Agriculture & fishing | 1961 |
| Mandala Garden Project Ltd | Agriculture & fishing | 2024 |
| Manha Spice (Grantown) Ltd | Hospitality | 2016 |
| Manha Spice Restaurant (Grantown) Ltd | Hospitality | 2017 |
| Maritsan Developments Limited | Professional & scientific | 1994 |
| Martin Jack Limited | Professional & scientific | 2021 |
| Matt's Bike Workshop Ltd | Manufacturing | 2018 |
| Maviston Developments Ltd | Real estate | 2015 |
| Maximus Orkney Ltd | Wholesale & retail | 2012 |
| MBD Dent Ltd | Health & social care | 2021 |
| MBS365 Ltd | Information & communication | 2014 |
| Mc&Pi Limited | Professional & scientific | 2024 |
| Mcfeat Technical Services Limited | Information & communication | 1996 |
| MDS Technical Solutions Ltd | Construction | 2025 |
| Melik Limited | Hospitality | 2012 |
| Mfive Consulting Services Ltd | Professional & scientific | 2020 |
| MFJ Construction Limited | Construction | 2008 |
| MFJ Homes Limited | Construction | 2003 |
| Micron Engineering Services (Scotland) Ltd. | Professional & scientific | 2017 |
| Mieles of Forres Ice Cream Ltd | Manufacturing | 2024 |
| MJ Forestry Ltd | Agriculture & fishing | 2021 |
| MJA Medical Ltd | Health & social care | 2023 |
| MJO Wellbeing Services Ltd | Education | 2024 |
| Monteith Solicitors Limited | Professional & scientific | 2018 |
| Moray Deer Management Limited | Other services | 2022 |
| Moray Electrical Ltd | Professional & scientific | 2012 |
| Moray Parcels Ltd | Transport & logistics | 2024 |
| More Plant and Building Ltd | Construction | 2010 |
| Morgan Hayward RA Limited | Construction | 2021 |
| Morrison Motor Sport Limited | Real estate | 1972 |
| Morrison Properties (Nairn) Ltd | Real estate | 2014 |
| MRM Pro Ltd | Arts & recreation | 2024 |
| Mundole Taxis and Mini Buses Ltd | Transport & logistics | 2015 |
| Murdo Macdonald (Joiner/Contractor) Limited | Construction | 2007 |
| Murdo Macrae Building Contractors Limited | Construction | 2003 |
| Mutch Better Foods Limited | Wholesale & retail | 2003 |
| Mycroft Ltd | Professional & scientific | 2025 |
| N.O.A.H Inspection Ltd | Manufacturing | 2012 |
| Nairn BID Limited | Administrative & support | 2018 |
| Nairn Building & Maintenance Ltd | Construction | 2011 |
| Nairn Citizens Advice Bureau Limited | Information & communication | 1997 |
| Nairn Community & Arts Centre | Arts & recreation | 1997 |
| Nairn Drama Limited | Arts & recreation | 2001 |
| Nairn Enterprises Ltd | Agriculture & fishing | 2022 |
| Nairn Hydrotherapy Trust | Health & social care | 2009 |
| Nairn Improvement Community Enterprise | Other services | 2010 |
| Nairn Inspection Ltd | Mining & quarrying | 2019 |
| Nairn Laundry Ltd | Other services | 2014 |
| Nairn Men's Shed | Other services | 2016 |
| Nairn Museum Ltd. | Arts & recreation | 2001 |
| Nairn Nails and Beauty Ltd | Other services | 2013 |
| Nairn River Enterprise | Other services | 2015 |
| Nairnshire Commercial Cleaning Ltd | Administrative & support | 2025 |
| Nairnshire Contractors Ltd | Transport & logistics | 2022 |
| Nairnshire Domestic Cleaning Ltd | Administrative & support | 2023 |