| DWG Tech Services Ltd | Professional & scientific | 2020 |
| Eccles-Wood Ltd | Wholesale & retail | 2025 |
| Eden STL Limited | Hospitality | 2025 |
| EGO Centre | Other services | 2003 |
| Ellerslie Properties Limited | Real estate | 1991 |
| EMS International Ltd | Wholesale & retail | 2021 |
| Eyespace Ltd | Information & communication | 2015 |
| Felicity's Arran Ltd | Hospitality | 2012 |
| Finance for Leisure (Glasgow) Limited | Extraterritorial | 1978 |
| Firebrand Works Ltd | Professional & scientific | 2022 |
| Fjord Maritime UK Ltd | Professional & scientific | 2022 |
| Frasertec Ltd | Construction | 2025 |
| G & T (Arran) Ltd | Wholesale & retail | 2018 |
| G Gregg Ltd | Administrative & support | 2022 |
| Gasmonte Limited | Mining & quarrying | 2011 |
| Gemstar Technologies Ltd | Professional & scientific | 2013 |
| Gillie Lynch Limited | Administrative & support | 2012 |
| Gillies Care Ltd | Construction | 2017 |
| Girbow Independent Trade Solutions Ltd | Other services | 2025 |
| Glenburn Gardens Limited | Agriculture & fishing | 2015 |
| Glenree Farmers | | 1996 |
| Hamilton Cottages Limited | Hospitality | 2022 |
| Happy Spider Trading Company Ltd. | Wholesale & retail | 2017 |
| Happydaysonarran Ltd | Wholesale & retail | 2026 |
| Harbour Havens Limited | Hospitality | 2001 |
| Harbour Side Street Food Ltd | Hospitality | 2025 |
| Harley Media Ltd | Professional & scientific | 2019 |
| Heather Lodge CIC | Health & social care | 2022 |
| Helidrome Ltd | Administrative & support | 2002 |
| Hendry Funeral Services Ltd | Other services | 2014 |
| Hermitage Investments Limited | Real estate | 1995 |
| High Tide Access Ltd | Construction | 2024 |
| Honest Coffins Limited | Manufacturing | 2012 |
| Hunter Yacht Deliveries Ltd | Transport & logistics | 2006 |
| Insitu Landscapes Ltd | Administrative & support | 2018 |
| Invercloy Limited | Hospitality | 2001 |
| Investing Ideas Ltd. | Financial services | 2012 |
| Island Quarters Limited | Real estate | 1997 |
| Isle of Arran Coffee Company Ltd | Manufacturing | 2017 |
| JDK Maintenance Ltd | Construction | 2018 |
| Joannides & Associates Ltd | Professional & scientific | 2016 |
| John Robertson & Sons (Joiners) Ltd. | Construction | 2004 |
| John Thomson Commercial Holdings Ltd | Financial services | 2021 |
| John Thomson Commercial Properties Ltd | Real estate | 2021 |
| John Thomson Construction Limited | Financial services | 1980 |
| John Thomson Holdings Ltd | Financial services | 2021 |
| Kayak Arran Ltd | Construction | 2019 |
| KC Cd&A Ltd | Professional & scientific | 2026 |
| Keen Renewables Ltd | Other services | 2021 |
| Kelvin Digital Limited | Information & communication | 2026 |
| Kidstore Childcare Limited | Administrative & support | 2009 |
| Kilbride Farmers | | 2001 |
| LA Verre Ltd | Wholesale & retail | 2017 |
| Lagg Properties Ltd | Hospitality | 2003 |
| Lamlash Bay Limited | Hospitality | 2009 |
| Lamlash Community Hub | Other services | 2024 |
| Lamlash Garage Arran Ltd | Wholesale & retail | 2026 |
| Lamlash Garage Holdings Ltd | Financial services | 2021 |
| Lamlash Garage Limited | Wholesale & retail | 2015 |
| Lamlash Yard Ltd | Real estate | 2025 |
| Laurence Blair Contracts Ltd | Professional & scientific | 2018 |
| Lochranza and Catacol Sea Society C.I.C | Arts & recreation | 2007 |
| Lochranza Community Inn Limited | Hospitality | 2022 |
| Love British Beer Ltd | Manufacturing | 2003 |
| Marketing Management Services International Ltd. | Professional & scientific | 1998 |
| Marketing Management Services Limited | Real estate | 1988 |
| Mccormack Audit and Consultancy Services Ltd | Professional & scientific | 2023 |
| Mccrazys Castles Ltd | Arts & recreation | 2025 |
| Mckenzie Investments (Scotland) Limited | Financial services | 2025 |
| Merchant City Car Park Ltd | Real estate | 2003 |
| Mount Pleasant Farm | | 1985 |
| Mowatt Limited | Information & communication | 2000 |
| Murchie Aggregates Ltd | Mining & quarrying | 2023 |
| Nasco Home Improvements Ltd | Construction | 2025 |
| Nasco Home Repairs & Maintenance Ltd | Construction | 2024 |
| NO 7 Homes Ltd | Real estate | 2020 |
| North Isle of Arran Ltd | Manufacturing | 2022 |
| O'Hare Building & Supplies Limited | Construction | 2023 |
| Old Byre Showroom Limited | Wholesale & retail | 2013 |
| PCM Arran Ltd | Other services | 2017 |
| Pinpoint Engineering Limited | Construction | 2017 |
| Proclean Arran Ltd | Administrative & support | 2026 |
| Profital Ltd | Professional & scientific | 2016 |
| R. Sloss Plumbing & Heating Arran Ltd | Construction | 2025 |
| Ramco Litigation Funding Limited | Professional & scientific | 2015 |
| RBC Arran Ltd | Administrative & support | 2010 |
| RDT Importers Limited | Wholesale & retail | 2015 |
| Reaf Property Ltd | Financial services | 2024 |
| RES18 Ltd | Construction | 2007 |
| Robbie & Barbara Limited | Hospitality | 1999 |
| Robert Howie & Sons (Scotland) Ltd | Construction | 2020 |
| Rosaburn Travel Ltd | Hospitality | 2025 |
| Rosie Investments Limited | Hospitality | 1997 |
| Rowan Tree Croft Ltd | Hospitality | 2024 |
| Runach Arainn Limited | Hospitality | 2015 |
| Salt & Thistle Arran Ltd | Hospitality | 2026 |
| SAM Marriott Plumbing and Heating Ltd | Construction | 2020 |
| Sams Vehicle Services Ltd | Wholesale & retail | 2026 |
| Scotslion Ltd | Construction | 2013 |
| Seawind Capital Limited | Professional & scientific | 2012 |