| RG Construction Consultants Ltd | Professional & scientific | 2024 |
| RGS25 Limited | Real estate | 2025 |
| RJ Dunoon Ltd | Hospitality | 2023 |
| RJM Property Enterpises Ltd | Real estate | 2024 |
| RK Property Limited | Real estate | 2020 |
| Roco Access Ltd | Construction | 2019 |
| ROP Engineering Ltd | Professional & scientific | 2019 |
| Ross & Co Accountants Ltd | Professional & scientific | 2022 |
| Ross & Company Properties Ltd | Real estate | 2025 |
| Ross Macarthur Contractor Limited | Construction | 2006 |
| Ross Macarthur Plant Hire Limited | Administrative & support | 2013 |
| Ross Macdonald Consultancy Ltd | Professional & scientific | 2025 |
| Rouk & CCS Ltd | Agriculture & fishing | 2023 |
| Safeshores Energy Services Limited | Other services | 2025 |
| Sandbank Community Development Trust | Public administration | 2002 |
| Scantec Joinery Ltd | Construction | 2018 |
| Seaboard Marine (Nigg) Limited | Transport & logistics | 1981 |
| Seale Partnership Limited | Extraterritorial | 2020 |
| Sequoia Holdings Limited | Real estate | 2017 |
| SGE Hotels Limited | Hospitality | 2010 |
| Shadow Detect Ltd | Information & communication | 2019 |
| Shearwater Diving Services Limited | Construction | 2002 |
| Shearwater Engineering Services Limited | Professional & scientific | 2002 |
| Shearwater Holdings Limited | Professional & scientific | 2002 |
| Shearwater Manpower Services Ltd | Construction | 2022 |
| Shearwater Marine Services Limited | Construction | 1992 |
| Shearwater Properties (Scotland) Limited | Real estate | 2025 |
| Sher Gill Enterprises Limited | Hospitality | 2004 |
| Silent Green Ltd | Professional & scientific | 2018 |
| Sligrachan Farm Limited | Agriculture & fishing | 2025 |
| Smileawi | Health & social care | 2016 |
| Solidarity Shopping UK Ltd | Wholesale & retail | 2021 |
| Sound and Shore Limited | Health & social care | 2023 |
| SR Wilson Property Limited | Real estate | 2022 |
| SSR Hospitality Ltd | Hospitality | 2013 |
| Stalvaig Homes Ltd | Real estate | 2025 |
| Steven Girvan Carpentry & Construction Ltd | Administrative & support | 2020 |
| Stewart Project Management Ltd. | Construction | 2008 |
| Stronchullin Energy Ltd | Energy | 2012 |
| Stucreoch Park Limited | Hospitality | 1983 |
| Subsea Dynamics Limited | Professional & scientific | 2009 |
| Sure Shot Film Ltd | Information & communication | 2020 |
| Systm Surveying Ltd | Professional & scientific | 2020 |
| Szitara Ltd. | Hospitality | 2018 |
| Tacit-Tacit Ltd | Construction | 2018 |
| Telacad Ltd | Information & communication | 2012 |
| Teliq Limited | Professional & scientific | 2023 |
| THE 51ST State (Dunoon) Limited | Hospitality | 2017 |
| THE Actual Reality Trust | Education | 2000 |
| THE Bluebells Band Limited | Information & communication | 2025 |
| THE Clansman Ltd | Hospitality | 2012 |
| THE D Squad Limited | Information & communication | 2024 |
| THE Dunoon Burgh Hall Trust | Arts & recreation | 2010 |
| THE Dunoon Project Limited | Administrative & support | 2019 |
| THE Hands of Love CIC | Arts & recreation | 2025 |
| THE Heidi Group Ltd | Health & social care | 2020 |
| THE Lock DOC 24HR Limited | Construction | 2016 |
| THE Lorcan Company Ltd | Professional & scientific | 2021 |
| THE Lorne Dunoon Ltd | Hospitality | 2017 |
| THE Realm of Adventure Ltd | Wholesale & retail | 2022 |
| THE Secret Glen Limited | Hospitality | 2021 |
| THE Tenementals Community Interest Company | Arts & recreation | 2025 |
| Thistle Radio Taxis | | 1995 |
| Thomas Young Ltd | Health & social care | 2025 |
| Tiny Tots Events Ltd | Arts & recreation | 2025 |
| Toggle Limited | Education | 2020 |
| Toro Gym Limited | Arts & recreation | 2025 |
| Toward Mooring Services Ltd | Administrative & support | 2021 |
| Trigger N Trout Ltd | Agriculture & fishing | 2024 |
| TS Forestry Ltd | Agriculture & fishing | 2026 |
| UTILITIES4BUSINESS Limited | Professional & scientific | 2017 |
| Validus-Fit-Coach Ltd | Arts & recreation | 2025 |
| Wanderingicons Ltd | Administrative & support | 2020 |
| Waterside Property Limited | Real estate | 2009 |
| West Coast Wilderness Medical Training Ltd | Education | 2024 |
| White Box Property Investing Ltd | Extraterritorial | 2020 |
| White Pepper Apparel Ltd | Wholesale & retail | 2021 |
| Wild at Art Ltd | Arts & recreation | 2012 |
| Wilton Consulting Services Limited | Information & communication | 2017 |
| Windward Services Ltd | Agriculture & fishing | 2020 |
| Wisdom Rose Developments Ltd | Real estate | 2022 |
| Wrestlrs Limited | Wholesale & retail | 2020 |
| Writes of Passage Limited | Professional & scientific | 2025 |
| Yachin Tangible Holdings (UK) Limited | Extraterritorial | 2015 |
| YG Developments (Scotland) Limited | Construction | 2021 |
| You'Re Unique Ltd | Hospitality | 2012 |