| SJ Bartlett Ltd | Professional & scientific | 2020 |
| SJ Commissioning Limited | Professional & scientific | 2022 |
| SJ Fairhurst Consulting Limited | Professional & scientific | 2024 |
| SJ Locker Ltd | Wholesale & retail | 2025 |
| SJ Melville Limited | Administrative & support | 2025 |
| SJ Smith Software Limited | Administrative & support | 2015 |
| SJA Cheshire Properties Ltd | Real estate | 2022 |
| SJA Clinic and Training Ltd | Other services | 2025 |
| SJA Upholstery Ltd | Manufacturing | 2019 |
| SJB Consult Ltd | Professional & scientific | 2020 |
| SJB Design Limited | Administrative & support | 2021 |
| SJB Propco Ltd | Real estate | 2023 |
| SJC Building Services Ltd | Administrative & support | 2025 |
| SJC Quality Information Management Ltd | Administrative & support | 2025 |
| SJG Services Limited | Information & communication | 2016 |
| SJH Renovations Limited | Construction | 2015 |
| Sjhpm Limited | Professional & scientific | 2023 |
| SJK Automation Limited | Professional & scientific | 2012 |
| SJK Civil Engineering Ltd | Construction | 2023 |
| Sjke Limited | Administrative & support | 2014 |
| SJM Designs Limited | Professional & scientific | 1999 |
| SJM Graphic Design Limited | Professional & scientific | 2024 |
| SJM Risk Consulting Limited | Professional & scientific | 2013 |
| SJM Technical Consulting Ltd | Professional & scientific | 2024 |
| SJR International Ltd | Administrative & support | 2024 |
| SJR Projects Limited | Administrative & support | 2022 |
| SJS Consulting Solutions Ltd | Administrative & support | 2026 |
| SJS Plant Limited | Administrative & support | 2017 |
| Sjtodd Ltd | Wholesale & retail | 2024 |
| SJW Consulting Solutions Ltd | Administrative & support | 2026 |
| SJW IT Limited | Information & communication | 2016 |
| SK 01 Limited | Real estate | 2018 |
| SK Infra Ltd | Administrative & support | 2013 |
| SK Mobile Mechanics Ltd | Wholesale & retail | 2026 |
| SK Planning Limited | Professional & scientific | 2022 |
| SK10 Investments Ltd | Real estate | 2025 |
| Skalannine Limited | Administrative & support | 2023 |
| Skandas Properties Limited | Real estate | 2025 |
| Skanergy Solutions Limited | Administrative & support | 2025 |
| Skanjan Ltd | Administrative & support | 2022 |
| SKB Logistics Ltd | Transport & logistics | 2026 |
| Skeva Ltd | Information & communication | 2016 |
| Skiing Giraffe Ltd | Information & communication | 2015 |
| Skill Refurbishment Ltd | Construction | 2024 |
| Skilled Trading Ltd | Professional & scientific | 2004 |
| Skillray Transport Services UK Limited | Manufacturing | 2004 |
| Skiman Limited | Professional & scientific | 2011 |
| Skin Checks North West Ltd | Health & social care | 2025 |
| Skin First (Hale) Limited | Other services | 2019 |
| Skin First Limited | Other services | 2018 |
| Skin Gods Ltd | Other services | 2025 |
| Skin LAB and Laser Ltd | Other services | 2026 |
| Skin Script Ltd | Health & social care | 2023 |
| Skingenius Ltd | Other services | 2010 |
| Skinners Electrical Limited | Construction | 2004 |
| Skinvista Limited | Health & social care | 2024 |
| Skinvitalise Ltd | Professional & scientific | 2022 |
| Skittech Limited | Information & communication | 2015 |
| Skittle North West Limited | Hospitality | 2015 |
| SKL Social Work Limited | Extraterritorial | 2015 |
| Skla Services Ltd | Administrative & support | 2025 |
| SKN by Scarlett Limited | Other services | 2025 |
| SKN Housing Ltd | Real estate | 2025 |
| SKN Technical Limited | Wholesale & retail | 2010 |
| Skoma Ltd | Information & communication | 2015 |
| SKR Consulting Solutions Ltd | Other services | 2019 |
| Sky Eagle Food Ltd | Manufacturing | 2024 |
| Skyetelco Limited | Administrative & support | 2025 |
| Skyfall Research Limited | Professional & scientific | 2012 |
| Skyhi Properties Ltd | Real estate | 2025 |
| Skyla Manfredi Limited | Extraterritorial | 2023 |
| Skylarke AI Solutions Limited | Information & communication | 2026 |
| Skyline Construction Property (NW) Limited | Construction | 2018 |
| Skyline Property & Construction Services Limited | Construction | 2011 |
| Skynet IT Ltd | Information & communication | 2023 |
| Skyplane Construction Limited | Administrative & support | 2025 |
| Skyward Holdings Ltd | Real estate | 2023 |
| SL Enterprises NW Limited | Hospitality | 2022 |
| Slaa Holdings Ltd | Construction | 2025 |
| Slade Designs Limited | Professional & scientific | 2007 |
| Slag Lane Medical Ltd | Health & social care | 2021 |
| Slam Proof Ltd | Wholesale & retail | 2011 |
| Slamdunk Entertainment Limited | Arts & recreation | 2017 |
| Slatdan Ltd | Professional & scientific | 2017 |
| Slates Estates Ltd | Real estate | 2022 |
| Slay Wholesale Ltd | Wholesale & retail | 2020 |
| SLB Brickwork Ltd | Construction | 2026 |
| SLC Engineering Services Limited | Administrative & support | 2015 |
| Sleak-Fox Limited | Administrative & support | 2013 |
| Sleek Engineering Limited | Administrative & support | 2013 |
| Sleeman Projects Limited | Administrative & support | 2015 |
| Sleepy Dog Computing Limited | Professional & scientific | 2017 |
| Slemani Grill Ltd | Hospitality | 2026 |
| Slemani Restaurant Ltd | Hospitality | 2024 |
| SLF Engineering Limited | Administrative & support | 2014 |
| Slide Smart UK Ltd | Manufacturing | 2025 |
| Slimbridge Energy Limited | Financial services | 2020 |
| Slip Guru Ltd | Information & communication | 2025 |
| SLK HIP and Knee Clinic Limited | Health & social care | 2017 |
| SLN Electric Ltd | Construction | 2022 |