| RGJ Plumbing and Heating Ltd | Construction | 2023 |
| RHF Properties Ltd | Real estate | 2025 |
| Richard Bull Ltd | Wholesale & retail | 2019 |
| Ridgeway House Limited | Financial services | 2015 |
| Ridley Automation Limited | Professional & scientific | 2015 |
| Riverside Resourcing & Consultancy Limited | Administrative & support | 2019 |
| Riverside Tree Care Ltd | Administrative & support | 2023 |
| RJS Consultancy & Training Ltd | Professional & scientific | 2025 |
| RLB Installations Limited | Construction | 2019 |
| RLE People Ltd | Professional & scientific | 2020 |
| Robin Cooper Associates Limited | Professional & scientific | 1999 |
| Robin Hood CR Limited | Hospitality | 2014 |
| Rock Dhoo Limited | Professional & scientific | 2023 |
| Rockshocks Limited | Manufacturing | 2012 |
| RR Idea Ltd. | Wholesale & retail | 2019 |
| RUN3 Limited | Extraterritorial | 2023 |
| Ryan Carney Ltd | Education | 2023 |
| RYG Productions Ltd | Information & communication | 2017 |
| S a Welding Ltd | Manufacturing | 2010 |
| Sally Brock Ltd. | Professional & scientific | 2011 |
| Sapphire Clinical Research Ltd | Real estate | 2014 |
| Savvi Travel Olney Limited | Administrative & support | 2015 |
| SB Controls Limited | Professional & scientific | 2021 |
| Scoperight Limited | Real estate | 1982 |
| Scorpion Enterprises Limited | Manufacturing | 1971 |
| Scorpion Mouldings Limited | Manufacturing | 1980 |
| Scott Brown Hairdressing Ltd | Other services | 2018 |
| Scroxton and Scroxton Ltd | Construction | 2021 |
| Sebright Homes Limited | Real estate | 2006 |
| Service Corps Ltd | Arts & recreation | 2014 |
| Shape & Tape Ltd | Other services | 2024 |
| Shoal Bay Developments Ltd | Real estate | 2021 |
| Silver Smiles Ltd | Administrative & support | 2017 |
| Simcasp Ltd | Hospitality | 2023 |
| SJH Fabweld Ltd | Manufacturing | 2019 |
| Skyhookspecial Limited | Professional & scientific | 2022 |
| Sliptest Ltd | Professional & scientific | 1998 |
| SMC Controls Limited | Professional & scientific | 2021 |
| Social Care People Ltd | Administrative & support | 2023 |
| Social Duck Limited | Information & communication | 2024 |
| Sofrono FX Ltd | Education | 2025 |
| Soul Farms Limited | Agriculture & fishing | 1960 |
| Soul Garages Limited | Real estate | 1962 |
| Soul Ideas Limited | Information & communication | 2012 |
| Spartan Trading Group Ltd | Manufacturing | 2024 |
| Spicgem Limited | Manufacturing | 1977 |
| Spire View Cottage Limited | Real estate | 2025 |
| Splash and Swim Limited | Education | 2016 |
| Sporting Performance Ltd | Education | 2023 |
| SR Property Services Olney Limited | Real estate | 2024 |
| St&L Consultancy Ltd | Transport & logistics | 2024 |
| Stable Quarters Horsebox Hire Limited | Administrative & support | 2012 |
| Stable Quarters Limited | Real estate | 2016 |
| Start UP Business Loans Limited | Financial services | 2019 |
| Steadfast Expertise Ltd | Wholesale & retail | 2025 |
| Steele Solutions Ltd | Real estate | 2020 |
| Stephen Oakley & Co Ltd | Real estate | 2023 |
| Stoic Roofing and Construction Limited | Construction | 2018 |
| Stoic Roofing Holdings Limited | Financial services | 2022 |
| Storemespace Limited | Transport & logistics | 2022 |
| Strands Hair Beauty Tanning Ltd | Other services | 2018 |
| Strata Risk Ltd | Administrative & support | 2016 |
| Stratus Marine Ltd | Manufacturing | 2023 |
| Studio Fifty Three Limited | Arts & recreation | 2016 |
| Subjective Systems Ltd | Information & communication | 2023 |
| Summit Gyms Ltd | Arts & recreation | 2026 |
| Superphonix Limited | Information & communication | 2014 |
| Surge Engineering Ltd | Professional & scientific | 2026 |
| Swan Virtual Assistance Ltd | Extraterritorial | 2006 |
| Synct Limited | Information & communication | 2009 |
| Systemslink Two Ltd. | Manufacturing | 1991 |
| T.H.E. Best Butchers Ltd | Wholesale & retail | 2003 |
| Tabcharm Properties Limited | Administrative & support | 1988 |
| Teareone Ltd. | Information & communication | 2025 |
| Tectrade Limited | Construction | 2014 |
| Templecoombe Limited | Administrative & support | 1986 |
| Teresa Marie Limited | Professional & scientific | 2011 |
| Terrafirmamk Ltd | Professional & scientific | 2025 |
| TGC Country Store Limited | Wholesale & retail | 2019 |
| TGL Investments Ltd | Real estate | 2024 |
| THE Aspiration Company (UK) Limited | Other services | 2002 |
| THE Association of 16MM Narrow Gauge Modellers | Arts & recreation | 1995 |
| THE Bedford Pantomime Company Limited | Arts & recreation | 2010 |
| THE Body Performance Centre Ltd | Health & social care | 2025 |
| THE Bozeat PUB Company Limited | Extraterritorial | 2023 |
| THE Brayfield Estates Title Company Ltd | Professional & scientific | 2004 |
| THE Creative Coalition Ltd | Professional & scientific | 2016 |
| THE Dawlish Ladies Company Ltd | Financial services | 2022 |
| THE Electric Scooter Company Group Ltd | Wholesale & retail | 2020 |
| THE Finance Clinic Limited | Financial services | 2004 |
| THE Fitness Hub Olney Ltd | Arts & recreation | 2018 |
| THE Fourth Course Ltd | Professional & scientific | 2025 |
| THE Gathered Studio Limited | Wholesale & retail | 2026 |
| THE Good Food & Gift Company Limited | Wholesale & retail | 1999 |
| THE GUN Cupboard Country Store Limited | Wholesale & retail | 2005 |
| THE House Gallery Ltd | Extraterritorial | 2008 |
| THE Intelligent Data Group Ltd | Information & communication | 2018 |
| THE IT Engineer Limited | Professional & scientific | 2022 |
| THE Little Coffee POT LLP | | 2021 |
| THE Masters Leisure Group Limited | Arts & recreation | 1998 |