| Shane Taylor Construction & Engineering Limited | Construction | 2022 |
| Shane Taylor Holdings Limited | Financial services | 2023 |
| Shane Taylor Welding Ltd | Manufacturing | 2014 |
| Shark Precast Ltd | Manufacturing | 2019 |
| Shenavall Limited | Professional & scientific | 2012 |
| Shift Aviation Solutions UK Ltd | Information & communication | 2022 |
| Silken Swirl Ltd | Wholesale & retail | 2025 |
| Singing SEO Ltd | Administrative & support | 2024 |
| SK Property Limited | Real estate | 2015 |
| Skelton Properties Limited | Hospitality | 2021 |
| SKS Upvc Installations Limited | Construction | 2019 |
| Slate of the Art Limited | Construction | 2014 |
| SM & SB Entertainment Ltd | Wholesale & retail | 2023 |
| Smash Burgers and Fries Ltd | Hospitality | 2024 |
| Smenumbers Limited | Information & communication | 2020 |
| Smithson Civils Ltd | Construction | 2025 |
| Snag Inspector Ltd | Professional & scientific | 2025 |
| Solway Decorators Limited | Construction | 2011 |
| Solway Fencing Ltd | Wholesale & retail | 2008 |
| Solway Power and Renewables Ltd | Energy | 2025 |
| Solway Technical Services Ltd | Professional & scientific | 2023 |
| Southside Flats (the Old Co-Op) Management Limited | Households | 2018 |
| Spokemist Limited | Professional & scientific | 1999 |
| Springlea Leisure Limited | Administrative & support | 2000 |
| Stag Inn Crosby Ltd | Hospitality | 2025 |
| Stanwix Automations Ltd | Information & communication | 2026 |
| Stephenson Electrical Ltd | Construction | 2000 |
| Stocks Bros. Limited | Manufacturing | 1952 |
| Storey & Warren Limited | Construction | 2003 |
| Straten Consulting Services Limited | Professional & scientific | 2021 |
| Straten Holdings Limited | Information & communication | 2022 |
| Straten Property Limited | Real estate | 2022 |
| Strawberry Meadows (Wigton) Management Company Limited | Households | 2025 |
| Strollers (Cumbria) Limited | Wholesale & retail | 2005 |
| Sugar & Smoke Ltd | Hospitality | 2026 |
| Sunkissed (Maryport) Ltd | Other services | 2012 |
| SW Civil Engineering Limited | Construction | 2010 |
| T D Kemp & SON Mobility Solutions Ltd | Construction | 2021 |
| T MAC G Ltd | Hospitality | 2025 |
| Taktra Health Ltd | Health & social care | 2025 |
| TAW Logistics Ltd | Transport & logistics | 2025 |
| Tayban Concrete Products (2010) Limited | Manufacturing | 1996 |
| Tczuk Ltd | Wholesale & retail | 2025 |
| THE Centre, West Cumbria Ltd | Health & social care | 2021 |
| THE Commercial Inn (Dearham) Ltd | Hospitality | 2024 |
| THE Green Lounge (Cumbria) Ltd | Hospitality | 2026 |
| THE High Brow Beauty Bar Ltd | Other services | 2021 |
| THE Lake District Hamper Company Ltd | Wholesale & retail | 2021 |
| THE Ship Hotel Allonby Limited | Hospitality | 2023 |
| THE Smugglers Cove Limited | Hospitality | 2024 |
| THE Wharf Ice Cream and Coffee House Ltd | Hospitality | 2021 |
| THE Wharf, Maryport Ltd | Hospitality | 2025 |
| Thecoacheszone Ltd | Wholesale & retail | 2022 |
| Them Lads Ltd | Administrative & support | 2025 |
| Theswaninnmaryport Limited | Hospitality | 2026 |
| Think Regrow Limited | Health & social care | 2025 |
| Thomas Armstrong (Aggregates) Limited | Transport & logistics | 1976 |
| Thomas Armstrong (Concrete Blocks) Limited | Manufacturing | 1964 |
| Thomas Armstrong (Construction) Limited | Construction | 1964 |
| Thomas Armstrong (Holdings) Limited | Construction | 1930 |
| Thomas Armstrong (Timber) Limited | Manufacturing | 1964 |
| Thompson's Paving and Groundworks Limited | Construction | 2023 |
| Tidal Stream Energy Ltd | Construction | 2020 |
| Tilecraft (Cumbria) Limited | Wholesale & retail | 2003 |
| Timeless Beauty Aesthetics by Jacqui Ltd | Extraterritorial | 2021 |
| Titanwave Mobile Tech Ltd | Wholesale & retail | 2026 |
| Tommy Collins Painter Decorator & Restoration Ltd | Construction | 2024 |
| Triple TTT (Cumbria) Limited | Transport & logistics | 2013 |
| Trojan Supplies Ltd | Wholesale & retail | 2023 |
| TT Marine (Cumbria) Ltd | Transport & logistics | 2010 |
| Tubecompetitions Ltd | Arts & recreation | 2025 |
| Tywcampers Ltd | Hospitality | 2025 |
| Ubros Limited | Wholesale & retail | 2025 |
| Unique Properties 4 U Ltd | Construction | 2025 |
| Veux Entertainment Ltd | Administrative & support | 2021 |
| VG Plumbing & Heating Services Ltd | Construction | 2021 |
| Viridian Vault Ltd | Wholesale & retail | 2025 |
| Vortex Security Services LLP | | 2021 |
| Wallrover Ltd | Professional & scientific | 2011 |
| Wash Away Launderette Ltd | Administrative & support | 2025 |
| Washington Homes Limited | Construction | 1960 |
| Weld-Eng Ltd | Professional & scientific | 2013 |
| West Coast Commercials Limited | Wholesale & retail | 1995 |
| West Cumbria Sheet Metal Ltd | Professional & scientific | 2026 |
| Westcoast Joinery & Tiling Ltd | Construction | 2020 |
| Westlakes Campervan Hire and Sales Ltd | Administrative & support | 2023 |
| Westlakes Landscaping Ltd | Professional & scientific | 2022 |
| Westlakes Productions Ltd | Hospitality | 2026 |
| Westlakes Property Development Ltd | Construction | 2022 |
| Westlands Farm Court Limited | Households | 2007 |
| Wharfview Transport Limited | Transport & logistics | 2017 |
| William Rainford (Holdings) Limited | Manufacturing | 1970 |
| Wilson Metals Limited | Wholesale & retail | 2002 |
| Wilters Gym CIC | Arts & recreation | 2021 |
| Woolly Madly Deeply Ltd | Manufacturing | 2012 |
| Workington Playgoers Club | Arts & recreation | 2009 |
| Your Local Choice Ltd | Wholesale & retail | 2024 |
| Zefer Ltd | Administrative & support | 2015 |