| Sound of Harris Shellfish Limited | Agriculture & fishing | 2017 |
| South Harris Bays LLP | | 2015 |
| Spaceport 1 CIC | Transport & logistics | 2017 |
| Spotless Solutions Stornoway Limited | Administrative & support | 2025 |
| SR Smile Ltd | Health & social care | 2014 |
| Steinish Community Development Trust Ltd | Other services | 2019 |
| Storage in Stornoway Limited | Transport & logistics | 2025 |
| Storlann Naiseanta NA Gaidhlig | Education | 1998 |
| Stornoway Black Pudding Company Limited | Manufacturing | 2021 |
| Stornoway Car Hire Ltd | Administrative & support | 2023 |
| Stornoway Distillers Ltd | Manufacturing | 2024 |
| Stornoway Fishermen's Chandlers Limited | Wholesale & retail | 2025 |
| Stornoway Grounds Maintenance Ltd | Administrative & support | 2017 |
| Stornoway Launderette Ltd | Other services | 2019 |
| Stornoway Seafari Ltd | Administrative & support | 2015 |
| Stornoway Self Catering Limited | Hospitality | 2025 |
| Stornoway Skips Limited | Water & waste | 2023 |
| Stornoway Storage Limited | Transport & logistics | 2021 |
| Stornoway Subsea Ltd | Agriculture & fishing | 2016 |
| Stornoway Van Hire Ltd | Administrative & support | 2023 |
| Stornoway Vehicle Hire Ltd | Administrative & support | 2022 |
| Stuart Murray Construction Ltd | Construction | 2014 |
| SYT Land Limited | Professional & scientific | 2004 |
| SYT Trading Limited | Professional & scientific | 1998 |
| T Pelley Electrical Ltd | Energy | 2020 |
| Taytech Services Limited | Mining & quarrying | 2012 |
| Tea and Biscuits Limited | Hospitality | 2021 |
| Tech-Mobile.Co.Uk Ltd. | Administrative & support | 2007 |
| Tgsc Limited | Information & communication | 2001 |
| THE Adhartas Trust | Administrative & support | 2019 |
| THE Bayhead Bridge Centre | Hospitality | 2005 |
| THE Blackhouse Candle Company Limited | Manufacturing | 2026 |
| THE Good Food Boutique Limited | Wholesale & retail | 2013 |
| THE Green Laundry Stornoway Ltd | Construction | 2021 |
| THE Harris Mills Limited | Manufacturing | 1991 |
| THE Harris Tweed Authority Educational Trust | Education | 1997 |
| THE Harris Tweed Loom Spares Co Ltd | Wholesale & retail | 2024 |
| THE Hub Cafe (Hebrides) Ltd | Hospitality | 2020 |
| THE Langan Band Ltd | Information & communication | 2024 |
| THE Maciver Teale Law Practice Ltd | Professional & scientific | 2016 |
| THE Seaweed Company Scotland Limited | Agriculture & fishing | 2014 |
| THE Stornoway Whisky Company Ltd | Extraterritorial | 2014 |
| Titan Props Limited | Other services | 2010 |
| Tour Outer Hebrides Ltd | Transport & logistics | 2021 |
| Transmission Power Solutions Ltd | Energy | 2026 |
| Tribe Training Limited | Education | 2026 |
| Tsquared Sales Consultants Limited | Professional & scientific | 2020 |
| Tweedtastic Ltd | Wholesale & retail | 2026 |
| Ubhebrides Ltd | Construction | 2012 |
| Urras Chuil Uairaich Ltd | Other services | 2019 |
| Urras Eaglais NA H-Aoidhe | Arts & recreation | 2001 |
| Urras NAN Gearrannan | Real estate | 1990 |
| Urras Storas an Rubha | Real estate | 2012 |
| Verge Marketing Ltd | Professional & scientific | 2017 |
| Virtual Yarns Limited | Professional & scientific | 2011 |
| Volunteering Hebrides | Other services | 2010 |
| Vortex Construction (Building Contractor) Limited | Construction | 2020 |
| Vortex Property Group Ltd | Households | 2025 |
| Walker Kennedy Ltd | Construction | 2024 |
| Warcon Consultancy Limited | Professional & scientific | 2007 |
| Warehouse Gym STY Limited | Arts & recreation | 2024 |
| Waulk Ltd | Manufacturing | 2019 |
| West Scotland Photography Limited | Professional & scientific | 2026 |
| Western Isles Citizens Advice Service | Information & communication | 2004 |
| Western Isles Construction Ltd | Other services | 2018 |
| Western Isles Development Trust | Other services | 2004 |
| Western Isles Hospital League of Friends | Health & social care | 2011 |
| Western Isles Rape Crisis Centre | Other services | 2006 |
| Whiteshore Cockles Ltd | Agriculture & fishing | 2010 |
| Young Musicians Hebrides | Education | 2005 |