| Luma Tower Developments Limited | Real estate | 1993 |
| Macdonald Real Estate Investment Limited | Real estate | 2021 |
| Mackay Aesthetics Ltd | Other services | 2026 |
| Mactaggart & Co. Limited | Real estate | 2008 |
| Magnate Capital LP | | 2016 |
| Making IT Better Ltd | Manufacturing | 2023 |
| Mamo Barbers Ltd | Other services | 2023 |
| Marosa Properties Ltd | Real estate | 2025 |
| Maxi Nails Limited | Other services | 2024 |
| MBB Properties Limited | Real estate | 2023 |
| MBS Building Services Ltd | Construction | 2011 |
| Mcanerney Limited | Wholesale & retail | 2005 |
| Mcdevitt & Co Limited | Professional & scientific | 2022 |
| Mcgowans Property Lets Ltd | Real estate | 2021 |
| Mcmanus & Sons Electrical Ltd | Construction | 2024 |
| Mcmillan Ff&E Ltd | Manufacturing | 2011 |
| Meadow Park Holdings Ltd | Households | 2024 |
| MI AMI Home Ltd | Wholesale & retail | 2026 |
| Miller Marine Limited | Manufacturing | 2026 |
| Milliemoo Property Ltd | Real estate | 2026 |
| Mmss Foods Ltd | Hospitality | 2013 |
| Monkey Bird Property Limited | Real estate | 2018 |
| Monkwood Estates Ltd | Administrative & support | 2024 |
| Moore Inspection Services Ltd | Professional & scientific | 2021 |
| Moorings Limited | Hospitality | 2023 |
| Munro External Works (Commercial) Ltd | Administrative & support | 2015 |
| Murie Mcdougall, Limited | Financial services | 1958 |
| Music Roundabout Limited | Information & communication | 2017 |
| MX Independent Financial Services Ltd. | Financial services | 2017 |
| Nardini at the Moorings Limited | Real estate | 1998 |
| Nelson Retail Ltd | Wholesale & retail | 2019 |
| Nicholson Mcshane Chartered Architects Ltd | Professional & scientific | 2017 |
| Nicolson Digital Limited | Information & communication | 2016 |
| Nightsky Productions Ltd | Arts & recreation | 2017 |
| Nightsky Studios Limited | Information & communication | 2022 |
| NO. 75 Ltd | Other services | 2014 |
| Noddsdale Hydro Limited | Energy | 2008 |
| North Star Dance Studio Ltd | Arts & recreation | 2025 |
| Ocean Sight Inspection Ltd | Professional & scientific | 2025 |
| Office Wizards Limited | Professional & scientific | 1999 |
| OH SEW Sarah Ltd | Wholesale & retail | 2018 |
| Oliver Exterior Group Ltd | Construction | 2026 |
| Omega Goods Ltd | Wholesale & retail | 2025 |
| P.T. Agile Solutions Ltd | Administrative & support | 2022 |
| Pargolf Ltd | Wholesale & retail | 2025 |
| Peak Pharma Ltd | Wholesale & retail | 2021 |
| Phase Utilities Ltd | Construction | 2022 |
| Pillsuite Ltd | Health & social care | 2026 |
| PIO Property Ltd | Households | 2025 |
| Portavadie Estates Ltd. | Hospitality | 1996 |
| Positive Action Club Limited | Professional & scientific | 2022 |
| Pringle Property Ltd | Real estate | 2020 |
| Pro Care Ayrshire Limited | Health & social care | 2015 |
| Provitas Europe LP | | 2014 |
| Pupils OUT of School Care Club | Arts & recreation | 2000 |
| R.Bun Investments Ltd | Real estate | 2021 |
| Raelec Engineering Limited | Professional & scientific | 1991 |
| Reilly Bell Ltd | Hospitality | 2026 |
| Riviera Largs Limited | Hospitality | 2025 |
| Robbie Sailing Services Ltd | Education | 2024 |
| Robert F Duff & Co Ltd | Professional & scientific | 2013 |
| Robert Rarity Funeral Services (Skelmorlie) Limited | Construction | 2021 |
| Robert Rarity Funeral Services Ltd. | Other services | 2001 |
| Rosed Coaching and Training Limited | Professional & scientific | 2018 |
| Ryan Interiors Limited | Administrative & support | 2019 |
| S & K Beckett Ltd | Financial services | 2019 |
| S Grant & Co Limited | Hospitality | 2015 |
| S.E. Connick Double Glazing & Joinery Ltd | Construction | 2015 |
| Sail Training Largs Ltd | Education | 2024 |
| Sailaway Scotland Yacht Charter Ltd. | Arts & recreation | 2011 |
| Sakura Brae Limited | Information & communication | 2010 |
| Salon 17 Ltd | Other services | 2015 |
| Salvtec Drilling Ltd | Construction | 2024 |
| Sams Shop Largs Ltd | Wholesale & retail | 2025 |
| Savvi Property Ltd | Real estate | 2023 |
| Scapa Services (UK) Ltd | Professional & scientific | 2015 |
| Scot-Yacht Ltd | Arts & recreation | 2004 |
| Scottjosephmeiklejohn Ltd | Extraterritorial | 2021 |
| Sea Clyde LLP | | 2018 |
| Sea Spray Yacht Charters Ltd. | Administrative & support | 2015 |
| Seacrest Sailing Ltd | Arts & recreation | 2022 |
| Seascape Scotland Yacht Charter Ltd | Arts & recreation | 2016 |
| Segment Spec Technoexport LP | | 2014 |
| Seobiz Ltd | Professional & scientific | 2019 |
| Serendipity Antiques Vintage & Retro Limited | Wholesale & retail | 2022 |
| Shortsided Golf Ltd | Manufacturing | 2026 |
| Showstructures Ltd | Administrative & support | 2025 |
| Showworks Theatre C.I.C. | Education | 2019 |
| Silk (Largs) Ltd. | Other services | 2013 |
| Skyemac Ltd | Wholesale & retail | 2023 |
| Skylark Sail Training Ltd | Education | 2024 |
| SLC Rentals Limited | Real estate | 2023 |
| SLIP2GRIP Limited | Manufacturing | 2013 |
| SLIP4WIND Advanced Manufacturing Limited | Manufacturing | 2025 |
| Smilesavvy Limited | Health & social care | 2024 |
| SMZ Aesthetics Limited | Health & social care | 2021 |
| SMZ Holdings Limited | Financial services | 2021 |
| Solwaltermeiklejohn Ltd | Extraterritorial | 2022 |
| Somerferg Consulting Ltd | Professional & scientific | 2023 |
| Southannan Properties Limited | Agriculture & fishing | 1972 |