| Millar Property Maintenance Ltd | Construction | 2025 |
| Millar,S Munchies Ltd | Hospitality | 2026 |
| Mnrc Structures Limited | Other services | 2017 |
| Modular Misting Fire Protection Ltd | Professional & scientific | 2025 |
| Moorfield Convenience Store Ltd | Wholesale & retail | 2023 |
| Moray First Limited | Administrative & support | 1999 |
| Moris & Moris Ltd | Wholesale & retail | 2024 |
| Muirshiel Resource Centre | Administrative & support | 2005 |
| Mwilaco Limited | Construction | 2021 |
| My PK Limited | Hospitality | 2021 |
| New Burma Store Ltd | Wholesale & retail | 2023 |
| Newark Coach Travel Ltd | Transport & logistics | 2026 |
| Newark Facilities & Utilities Management Support Ltd | Professional & scientific | 2010 |
| NM Bathrooms Limited | Construction | 2014 |
| NN Developers Ltd | Real estate | 2021 |
| Nn&Co Ltd | Wholesale & retail | 2019 |
| North Building Surveys Limited | Professional & scientific | 2016 |
| Ocel Ltd | Construction | 2025 |
| One Clover Limited | Real estate | 2024 |
| Optosci Limited | Extraterritorial | 1994 |
| Ormsary Scallops Limited | Agriculture & fishing | 1976 |
| P&S Traders Ltd | Wholesale & retail | 2014 |
| Packsure Limited | Administrative & support | 2021 |
| PAN360 Limited | Arts & recreation | 2026 |
| Parklea Association Branching OUT Ltd. | Education | 1997 |
| Party Perfection Ltd | Transport & logistics | 2024 |
| Perfect Paws Collective Ltd | Professional & scientific | 2023 |
| Philip Dunning Delivery Ltd | Transport & logistics | 2026 |
| PJA Supplies Ltd | Wholesale & retail | 2026 |
| Platinum Plastering Services Ltd | Construction | 2024 |
| PM Roofing and Landscaping Contracts Limited | Construction | 2026 |
| Port Glasgow Car Wash Ltd | Administrative & support | 2024 |
| Port Glasgow Funeral Services Ltd | Administrative & support | 2017 |
| Port Glasgow Training Initiative | Education | 2000 |
| Port Glasgow Voluntary Trans-Port Group | Administrative & support | 2005 |
| Port Hardware Plus Ltd | Wholesale & retail | 2020 |
| Port News Ltd | Wholesale & retail | 2016 |
| Port News Retail Ltd | Wholesale & retail | 2019 |
| Portadvice Limited | Hospitality | 2002 |
| Porto Cafe Ltd | Hospitality | 2023 |
| Power AXE Engineering Ltd | Agriculture & fishing | 2022 |
| Prime 11 Ltd | Wholesale & retail | 2025 |
| Prime Port Limited | Wholesale & retail | 2023 |
| Prochem Scotland Ltd. | Wholesale & retail | 1978 |
| Property Services Scotland Ltd | Extraterritorial | 2020 |
| Qais Traders Limited | Wholesale & retail | 2018 |
| Radio Electrical Supplies (Scotland) Limited | Wholesale & retail | 1970 |
| Ravensure Properties Limited | Construction | 2015 |
| Razor Cutt Ltd | Other services | 2019 |
| Reed DM Limited | Administrative & support | 2020 |
| Reed MM Limited | Administrative & support | 2020 |
| REL Direct Limited | Manufacturing | 2005 |
| REL Group Limited | Administrative & support | 2005 |
| REL Recruitment Limited | Administrative & support | 1998 |
| Renfrewshire Electronics Limited | Information & communication | 1995 |
| Rise Against Abuse Community Interest Company | Professional & scientific | 2021 |
| RKEYESPROP04 Ltd | Real estate | 2024 |
| Rodlak Limited | Other services | 2018 |
| Rogoz Capital Limited | Real estate | 2019 |
| Rogoz Holdings Ltd | Extraterritorial | 2021 |
| Roma Italian Street Food Ltd | Hospitality | 2023 |
| Ropeworks Offshore Company Limited | Professional & scientific | 2009 |
| Rose LEE Blinds Limited | Wholesale & retail | 2015 |
| Rosebank Psychology Ltd | Education | 2025 |
| Ross Douglas Gray Car Sales Ltd | Wholesale & retail | 2025 |
| RS Luxury Transport Ltd | Transport & logistics | 2025 |
| S & L Unique Holdings Limited | Households | 2023 |
| S Bell Marine Services Ltd | Other services | 2020 |
| Safer Scotland Ltd | Manufacturing | 2016 |
| SAM Superstore Limited | Wholesale & retail | 2010 |
| Saveme Scotland Ltd | Transport & logistics | 2025 |
| Scotech Limited | Manufacturing | 1999 |
| Scotech Properties Ltd | Real estate | 2013 |
| Sculptedwellness Limited | Other services | 2025 |
| SD Kitchens Ltd | Construction | 2014 |
| Slice of Delights Ltd | Wholesale & retail | 2025 |
| SMESTATES1 Ltd | Hospitality | 2024 |
| Smith & Houston Limited | | 1936 |
| Software Training Scotland Ltd. | Information & communication | 2011 |
| Southern Square Ventures Ltd | Wholesale & retail | 2026 |
| Specialist Roofing Scotland Ltd | Construction | 2019 |
| Spice Haven Hospitality Ltd | Hospitality | 2025 |
| Srondoire Hydro Limited | Energy | 2014 |
| SS Travel (Greenock) Limited | Administrative & support | 2025 |
| Stag and Stay Ltd | Construction | 2026 |
| Sun First GB Ltd | Administrative & support | 2011 |
| Sun First Limited | Administrative & support | 2004 |
| Sun Waves 3 Ltd | Other services | 2012 |
| Sun Waves 4 Ltd | Other services | 2012 |
| Swan Grace Pilates (Hillington) Limited | Arts & recreation | 2025 |
| Swan Grace Pilates Ltd | Arts & recreation | 2024 |
| T26 Tax Limited | Professional & scientific | 2019 |
| T27 Tax Limited | Professional & scientific | 2010 |
| Tannahill Aesthetics Ltd | Other services | 2022 |
| Tanpopo Limited | Real estate | 2021 |
| TC Facilities Limited | Construction | 2013 |
| TC Properties (Scotland) Ltd | Real estate | 2024 |
| TC Scotland Limited | Real estate | 2013 |
| THE ARK on the Clyde CIC | Agriculture & fishing | 2019 |
| THE Balmore Group Ltd | Construction | 2022 |