| Ruvelthan Care Ltd | Public administration | 2023 |
| RUZ Ltd | Transport & logistics | 2021 |
| Rvill Specialist Healthcare Limited | Extraterritorial | 2013 |
| RVM Training Services Limited | Education | 2019 |
| RW Roofers Ltd | Construction | 2025 |
| Rwelch Consulting Limited | Professional & scientific | 2016 |
| Rwpm Services Ltd | Construction | 2025 |
| RXF Sports Ltd | Wholesale & retail | 2020 |
| Rya.Com Ltd | Professional & scientific | 2012 |
| Ryan Mcbarron Carpets Ltd | Construction | 2023 |
| Rydan Developments Ltd | Construction | 2023 |
| Ryddc Services Ltd | Transport & logistics | 2019 |
| Ryebridge Limited | Construction | 2009 |
| Ryro Construction Ltd | Construction | 2025 |
| Ryro Properties Ltd | Real estate | 2022 |
| RYS Property Services Limited | Real estate | 2025 |
| RZ Builders Ltd | Construction | 2023 |
| RZ Electric Appliances Ltd | Wholesale & retail | 2024 |
| S & a High Constructions Ltd | Construction | 2021 |
| S & C Ayres Construction Ltd | Construction | 2020 |
| S & H Tree and Garden Services Limited | Construction | 2026 |
| S & J Electrical Limited | Construction | 2005 |
| S & J Law Ltd | Professional & scientific | 2020 |
| S & K Motorists Centre Limited | Wholesale & retail | 2015 |
| S & M Accountax Limited | Professional & scientific | 2022 |
| S & M Constructions Work Ltd | Construction | 2017 |
| S & N Building Luton Ltd | Construction | 2021 |
| S & N Capital Ltd | Wholesale & retail | 2020 |
| S & N Commercial Sales Ltd | Wholesale & retail | 2025 |
| S & N Kabul Bazar Ltd | Wholesale & retail | 2022 |
| S & N Motor Trade Ltd | Wholesale & retail | 2025 |
| S & S Nexus Ltd | Wholesale & retail | 2021 |
| S & S Portfolio Management Limited | Administrative & support | 2024 |
| S & S Print Limited | Manufacturing | 2006 |
| S & S Security Ltd | Administrative & support | 2019 |
| S & T Crest Global Limited | Wholesale & retail | 2026 |
| S & Y Houses Ltd | Real estate | 2020 |
| S & Z Rahman Property Limited | Real estate | 2018 |
| S (UK) Limited | Real estate | 2025 |
| S a Design Consultants Ltd | Professional & scientific | 2019 |
| S a Health Consulting Ltd | Administrative & support | 2021 |
| S ALI Investments Limited | Real estate | 2019 |
| S and S Wines Limited | Wholesale & retail | 2004 |
| S Carr (UK) Limited | Real estate | 2008 |
| S Cutz Limited | Other services | 2018 |
| S G Evans Construction Ltd | Construction | 2015 |
| S H and B Brown LP | | 2012 |
| S H Pratt & Company Limited | Extraterritorial | 1947 |
| S H Pratt Group (Tropical) Limited | Wholesale & retail | 2024 |
| S H Pratt Holdings Limited | Wholesale & retail | 2015 |
| S Habib Construction Ltd | Construction | 2024 |
| S Hobbs 2022 Ltd | Hospitality | 2022 |
| S Holden Heating Ltd | Construction | 2019 |
| S HUT Fastfood Limited | Hospitality | 2026 |
| S I Courierz Ltd | Wholesale & retail | 2024 |
| S J Sondhi Ltd | Construction | 2017 |
| S Jalal Limited | Hospitality | 2022 |
| S K G Q Ltd | Wholesale & retail | 2024 |
| S Khan Solutions Ltd | Information & communication | 2019 |
| S MAX Ltd | Construction | 2016 |
| S Mitcheson Design Ltd | Professional & scientific | 2015 |
| S N G P Properties Ltd | Real estate | 2018 |
| S P H Carpentry Limited | Construction | 2015 |
| S R Transfer Ltd | Transport & logistics | 2024 |
| S Road Solutions Limited | Wholesale & retail | 2025 |
| S S Consultancy Solutions Ltd | Administrative & support | 2024 |
| S S Food and Wine Luton Ltd | Wholesale & retail | 2018 |
| S Sumi Food and Wine Limited | Wholesale & retail | 2025 |
| S&A Foods (Luton) Limited | Hospitality | 2018 |
| S&A Metals Ltd | Manufacturing | 2019 |
| S&Ab Logistics Ltd | Transport & logistics | 2026 |
| S&D Scaffolding Services Ltd | Construction | 2025 |
| S&E Concierge Services Ltd | Hospitality | 2019 |
| S&E Contractors Limited | Construction | 2014 |
| S&G Cars Luton Limited | Administrative & support | 2015 |
| S&H Global Ltd | Wholesale & retail | 2023 |
| S&H Store Ltd | Wholesale & retail | 2018 |
| S&K Consultancy Ltd | Manufacturing | 2020 |
| S&K Housing Estates Limited | Real estate | 2019 |
| S&K Select Ltd | Wholesale & retail | 2025 |
| S&K Transport Inc Ltd | Wholesale & retail | 2021 |
| S&M Professional Services Limited | Education | 2022 |
| S&N Asset Management Ltd | Real estate | 2022 |
| S&N Consultancy Ltd | Administrative & support | 2016 |
| S&N FRY & Ride Ltd | Hospitality | 2025 |
| S&Q Properties Ltd | Real estate | 2018 |
| S&S Accounting & Tax Limited | Professional & scientific | 2026 |
| S&S Amazing Food Limited | Hospitality | 2021 |
| S&S Car and Van Recovery 24/7 Limited | Transport & logistics | 2024 |
| S&S Facilities Limited | Construction | 2012 |
| S&S Global Estates Ltd | Real estate | 2025 |
| S&S Global Property Ltd | Real estate | 2023 |
| S&S Housing Group Ltd | Real estate | 2023 |
| S&S Investment Group Ltd | Real estate | 2024 |
| S&S Luton Developments Limited | Real estate | 2022 |
| S&S Sunshine Ltd | Hospitality | 2025 |
| S&Z Capital Holdings Ltd | Financial services | 2026 |
| S&Z Capital Investments Ltd | Financial services | 2026 |
| S&Z Power Limited | Professional & scientific | 2013 |
| S'Arm & Doctorand Ahmed GUT GOD in Alah Ltd | Manufacturing | 2020 |