| 58 Degrees North Catering Limited | Hospitality | 2017 |
| 8BALL Enterprises Ltd | Wholesale & retail | 2005 |
| A B Electronics (STY) Limited | Administrative & support | 2006 |
| A Campbell Electrical Services Ltd | Construction | 2006 |
| A. Bagley Hospitality Ltd | Extraterritorial | 2019 |
| A. Macaulay Limited | Other services | 1946 |
| Abservicesstornoway Limited | Transport & logistics | 2023 |
| Accommodation in Stornoway Ltd | Hospitality | 2009 |
| Acro Technical Services Limited | Professional & scientific | 2025 |
| Adventra Franchising Ltd | Administrative & support | 2025 |
| Adventra Ltd | Administrative & support | 2011 |
| Agrarian Crafts Ltd | Manufacturing | 2021 |
| Air an LOT Ltd | Agriculture & fishing | 2019 |
| AJG Subsea Services Ltd | Mining & quarrying | 2019 |
| AK & DM Morrison Ltd. | Agriculture & fishing | 1998 |
| AKN Construction Management Limited | Construction | 2025 |
| Alasdair Nicholson Community Development Consultant Ltd | Professional & scientific | 2025 |
| Alex Murray (Construction) Limited | Construction | 2000 |
| AM Hospitality and Management Ltd | Hospitality | 2026 |
| Amac Projects Ltd | Agriculture & fishing | 2025 |
| Amk-Ims UK Ltd | Professional & scientific | 2020 |
| Angus Macarthur Limited | Mining & quarrying | 2021 |
| Angus Maciver Limited | Manufacturing | 1974 |
| Archicosm Ltd. | Professional & scientific | 2005 |
| Ardhasaig House Limited | Hospitality | 2003 |
| Arnol Offshore Limited | Mining & quarrying | 2024 |
| Aros Catering Ltd | Hospitality | 2025 |
| Aros Retail Ltd | Wholesale & retail | 2025 |
| Asat Media Systems Ltd | Construction | 2009 |
| Atomist | Other services | 2019 |
| Avanava Ltd | Professional & scientific | 2025 |
| Bark Side Dog Park Ltd | Arts & recreation | 2025 |
| Barvas Estate, Limited | Real estate | 1924 |
| Bayble House Ltd | Wholesale & retail | 2019 |
| Bernera Blue Ltd | Professional & scientific | 2011 |
| Bernera Community Association | Hospitality | 1999 |
| Bhaltos Community Trust Limited | Other services | 1998 |
| Black Sheep Croft Ltd | Hospitality | 2009 |
| Blackwater Coatings Ltd | Construction | 2024 |
| Blossomers Ltd | Manufacturing | 2023 |
| Blue MAN Seafood Ltd | Hospitality | 2025 |
| Bonailie Ltd | Wholesale & retail | 2021 |
| Boshan CIC | Manufacturing | 2022 |
| Braighe Holdings Ltd | Real estate | 2020 |
| Breacan Training Limited | Administrative & support | 2000 |
| Broadbay Homes Limited | Real estate | 2017 |
| Buth an Rubha Limited | Wholesale & retail | 2012 |
| CA Marine Ltd | Manufacturing | 2020 |
| Cabanasty Ltd | Hospitality | 2026 |
| Cala Hotels Limited | Administrative & support | 1990 |
| Caledonian Hotel (STY) Limited | Hospitality | 2025 |
| Calmax Civils Limited | Construction | 2007 |
| Calmax Construction Limited | Construction | 1999 |
| Calum Morrison Consultancy Limited | Professional & scientific | 2007 |
| Calum Murray Limited | Construction | 2004 |
| Camerons Chip Shop Ltd | Hospitality | 2006 |
| Carloway Consulting Limited | Professional & scientific | 2013 |
| Carloway Crofts Limited | Agriculture & fishing | 2014 |
| Carloway Estate Trust (Urras Oighreachd Charlabhaigh) | Real estate | 2014 |
| Cass (Scotland) Limited | Manufacturing | 2023 |
| Ccle Fabrication Ltd | Mining & quarrying | 2017 |
| CCW World Limited | Wholesale & retail | 2002 |
| CDC Technology Services Limited | Information & communication | 2011 |
| Celtic Wizard Ltd | Arts & recreation | 2024 |
| Charles Macleod Limited | Wholesale & retail | 2002 |
| Chris Marron and Associates Limited | Professional & scientific | 2022 |
| Cianalas Ltd | Financial services | 2024 |
| CIB Developments Limited | Real estate | 2004 |
| CIB Secretarial Limited | Administrative & support | 2016 |
| CIB Stornoway Limited | Professional & scientific | 2007 |
| CLM Transport (Stornoway) Ltd | Transport & logistics | 2024 |
| CM Construction Stornoway Limited | Construction | 2021 |
| CNM Offshore Construction Limited | Professional & scientific | 2018 |
| Co-Chomunn NA Pairc | Arts & recreation | 2001 |
| Colony Ltd | Extraterritorial | 2024 |
| Comunn Eachdraidh NIS | Arts & recreation | 2002 |
| Concept Management Solutions Ltd | Wholesale & retail | 2023 |
| Conspiracy Ltd | Extraterritorial | 2015 |
| Contracts Management Limited | Professional & scientific | 2011 |
| Copper Crab Consultancy Ltd | Professional & scientific | 2014 |
| Corcadal Productions Limited | Information & communication | 2006 |
| Corran Media Limited | Information & communication | 2009 |
| Corryan Trading Limited | Wholesale & retail | 2013 |
| Craig Munro Consultancy Ltd | Professional & scientific | 2025 |
| Cranachan Publishing Limited | Information & communication | 2015 |
| Croft 10 Shulishader Ltd | Hospitality | 2021 |
| Croft 47 Ltd | Agriculture & fishing | 2025 |
| Cutting Edge Lawn Services Ltd | Agriculture & fishing | 2024 |
| CW Goods Limited | Wholesale & retail | 2020 |
| D J Macaulay Construction Limited | Construction | 2003 |
| D Macinnes Associates Ltd | Agriculture & fishing | 2003 |
| D N Macleod Ltd | Transport & logistics | 2007 |
| Dalziel + Scullion Ltd | Arts & recreation | 2015 |
| Danmac Racing Ltd | Arts & recreation | 2022 |
| DAT Macb Ltd | Other services | 2025 |
| Dcnstrct Ltd | Wholesale & retail | 2020 |
| DECOR8 (Stornoway) Ltd | Wholesale & retail | 2013 |
| Deepness Ltd | Health & social care | 2020 |
| Dellaporta Ltd | Manufacturing | 2018 |
| DG Estimating Ltd | Professional & scientific | 2016 |