| Skrg Limited | Real estate | 2019 |
| Skrub Games Ltd | Manufacturing | 2024 |
| Skryba Accountancy Limited | Professional & scientific | 2017 |
| SKS Pharma Consulting Ltd | Professional & scientific | 2025 |
| SKS Property & Lettings Limited | Real estate | 2024 |
| Sksj Medicals Ltd | Health & social care | 2015 |
| Sksjak Ltd | Real estate | 2020 |
| Skull Cherub Limited | Information & communication | 2025 |
| SKW Csheq Solutions Ltd | Professional & scientific | 2020 |
| Sky Apartments & Homes Ltd | Real estate | 2025 |
| Sky Bar Ltd T/A Sky Bar and Grill Ltd | Hospitality | 2024 |
| Sky Breaks Ltd | Wholesale & retail | 2026 |
| Sky Broadband Ltd | Information & communication | 2021 |
| Sky Euro Flight Limited | Information & communication | 2025 |
| Sky Garden Limited | Construction | 2007 |
| Sky Gardens Buyers Limited | Real estate | 2021 |
| Sky Grill Ltd T/A Sky Bar and Grill Ltd | Hospitality | 2024 |
| Sky Visa Services Ltd | Administrative & support | 2026 |
| Skyai Ltd | Hospitality | 2025 |
| SKYBANE81 Ltd | Professional & scientific | 2018 |
| Skyber Flooring Limited | Other services | 2009 |
| Skydancer Media Ltd. | Information & communication | 1997 |
| Skydimi Limited | Real estate | 2026 |
| Skye Blue Property Limited | Real estate | 2020 |
| Skye Communications Limited | Administrative & support | 2014 |
| Skye Developments (Leeds) Limited | Real estate | 2026 |
| Skye Direct Limited | Wholesale & retail | 2008 |
| Skye Properties (Leeds) Limited | Real estate | 2026 |
| Skye Utilities Limited | Administrative & support | 2014 |
| Skyehealth Ltd | Information & communication | 2025 |
| Skye’S Adventures Limited | Health & social care | 2025 |
| Skyfall Holdings Limited | Wholesale & retail | 2016 |
| Skyfarm Leeds Limited | Wholesale & retail | 2003 |
| Skylark Medicals Management Ltd | Real estate | 2011 |
| Skylarks Group Limited | Transport & logistics | 2025 |
| Skylarks Logistics Ltd | Transport & logistics | 2025 |
| Skylarks Security Services Ltd | Transport & logistics | 2021 |
| Skyle Ltd | Wholesale & retail | 2021 |
| Skylight Properties Limited | Real estate | 2015 |
| Skylight Roof Repairs Limited | Construction | 2026 |
| Skyline Development & Construction Ltd | Construction | 2017 |
| Skyline Investments Yorkshire Ltd | Real estate | 2025 |
| Skyline Motors Ltd | Wholesale & retail | 2022 |
| Skyline Scaffolding (Northern) Limited | Construction | 2012 |
| Skylltiling Ltd | Construction | 2023 |
| Skylux Enterprise Limited | Health & social care | 2015 |
| Skymagic UK Limited | Arts & recreation | 2023 |
| Skymax Computers UK Limited | Wholesale & retail | 2024 |
| Skyn by Francesca the Facialist Limited | Other services | 2025 |
| Skynet Solutions Ltd | Information & communication | 2023 |
| Skyol Ltd | Professional & scientific | 2020 |
| Skypower Distributors Limited | Wholesale & retail | 2025 |
| Skypower Entertainment Ltd | Professional & scientific | 2022 |
| Skypower Radio & TV Services Ltd | Manufacturing | 2025 |
| Skyra Estates Limited | Real estate | 2026 |
| Skyra World Limited | Hospitality | 2026 |
| Skyron Health Ltd | Professional & scientific | 2018 |
| Skyru Management Limited | Hospitality | 2013 |
| Skyscrapers TC CIC | Arts & recreation | 2025 |
| Skytek Ltd | Professional & scientific | 2022 |
| Skytel Telecom UK Ltd | Information & communication | 2019 |
| Skyward Systems Ltd | Construction | 2025 |
| Skyworks Online Limited | Professional & scientific | 2010 |
| SL European Living Duet Ltd | Real estate | 2017 |
| SL Group International Ltd | Professional & scientific | 2024 |
| SLA Building Services Ltd | Construction | 2022 |
| Slab IT Limited | Construction | 2024 |
| Slam Dunk Limited | Hospitality | 2009 |
| Slam Dunk Records Limited | Arts & recreation | 2009 |
| Slap Collective Ltd | Arts & recreation | 2022 |
| Slate & Oak Bespoke Developments Ltd | Construction | 2025 |
| Slate EDD Limited | Wholesale & retail | 2009 |
| Slater Brothers (Whitley) Limited | | 1936 |
| Slater Construction (Yorkshire) Limited | Construction | 2010 |
| Slater's of Horsforth Limited | Other services | 1962 |
| SLB Capturi UK Limited | Construction | 2021 |
| SLB Public Relations Limited | Professional & scientific | 2003 |
| Slbpr Industry Insider Ltd | Professional & scientific | 2025 |
| SLD Finance Limited | Professional & scientific | 2023 |
| Slead Limited | | 1987 |
| Sledgehammer Repairs Ltd | Manufacturing | 2025 |
| Sleek & Chic Ltd | Wholesale & retail | 2023 |
| Sleek Bathrooms Limited | Wholesale & retail | 2024 |
| Sleek Flooring Ltd | Wholesale & retail | 2025 |
| Sleekys Foodhub Ltd | Wholesale & retail | 2026 |
| Sleep Factory Ltd | Manufacturing | 2014 |
| Sleep in Beauty Limited | Manufacturing | 2017 |
| Sleep Maker Ltd | Wholesale & retail | 2019 |
| Sleepy Cat Ltd | Information & communication | 2026 |
| Sleeve Solutions Limited | Manufacturing | 2007 |
| Sles (Leeds) Ltd | Extraterritorial | 2021 |
| SLG Management Services Limited | Information & communication | 2008 |
| SLH Lettings Limited | Real estate | 2024 |
| Slick Brands Limited | Wholesale & retail | 2023 |
| Slide Smart Interiors Ltd | Manufacturing | 2024 |
| Slightly Bezz Ltd | Real estate | 2023 |
| Slim Ltd | Administrative & support | 2026 |
| Slingsby Court Property Management Limited | Households | 1993 |
| Slinn Property Holdings Ltd | Real estate | 2024 |
| SLIP278 Ltd | Hospitality | 2021 |