| One Stop UK Consulting Limited | Other services | 2019 |
| Optmind Limited | Professional & scientific | 2015 |
| Orchard Rugbytots LLP | | 2021 |
| Orchards Ampthill Ltd | Real estate | 2012 |
| Oxmedi Medical Limited | Manufacturing | 2026 |
| Pailing Ltd | Professional & scientific | 2018 |
| Palstone Limited | Wholesale & retail | 1979 |
| Paon Limited | Professional & scientific | 2018 |
| Park Point Limited | Administrative & support | 2025 |
| Perceptive Financial Solutions Ltd | Financial services | 2006 |
| Plan IT Retail Limited | Professional & scientific | 2008 |
| Platinum Hotels Limited | Extraterritorial | 2011 |
| PNC HR Ltd | Professional & scientific | 2019 |
| Posh Smocks Limited | Wholesale & retail | 2025 |
| PRC Decorating Ampthill Limited | Construction | 2026 |
| Pressed 4 Time Ironing & Laundry Services Limited | Other services | 2011 |
| Prime Logic Solutions Limited | Professional & scientific | 2022 |
| Primett Holdings Limited | Real estate | 2018 |
| Priory Country Estates Limited | Real estate | 2000 |
| Protap and Gloria Limited | Real estate | 2017 |
| Quasar Media Technology Ltd | Information & communication | 2015 |
| R L B Care Services Limited | Health & social care | 2017 |
| Rachel Sampson Ltd | Professional & scientific | 2019 |
| Raffaelle Ltd | Other services | 2017 |
| Ramaloo Investments Ltd | Real estate | 2023 |
| Rapid Ecom Ltd | Wholesale & retail | 2023 |
| Reaching Futurity Ltd | Information & communication | 2019 |
| Recontra Solutions Limited | Other services | 2012 |
| Red Runn (UK) Ltd | Professional & scientific | 2014 |
| Results Global Marketing Solutions Limited | Professional & scientific | 2005 |
| Results Global Services Group Limited | Professional & scientific | 2003 |
| Retrolink Limited | Health & social care | 2003 |
| RETURN2NEW Ltd | Real estate | 2025 |
| Revendale Limited | Other services | 2018 |
| Rixon Frost Limited | Administrative & support | 2017 |
| Rksn Limited | Real estate | 2018 |
| Russell & Co Properties Ltd | Real estate | 2020 |
| S C G Cleaning Services Limited | Other services | 1997 |
| S Sira Group Limited | Other services | 2014 |
| S Tilbrook Limited | Construction | 2024 |
| Sandra Evans Consulting Limited | Professional & scientific | 2012 |
| SAY AHH! Ltd | Professional & scientific | 2014 |
| Second Paragraph Productions Ltd | Arts & recreation | 2021 |
| Shah Optical Holdings Ltd | Other services | 2023 |
| Shapeshifter Creative Ltd | Information & communication | 2012 |
| Sheerah Network | Information & communication | 2022 |
| Sheth Property Hub Limited | Real estate | 2021 |
| Shirley Sports Limited | Education | 2008 |
| Silapi Limited | Financial services | 2021 |
| Sira BH LLP | | 2025 |
| Sira Building & Development Limited | Other services | 2011 |
| SJ Futures Limited | Real estate | 2019 |
| SL Intl Limited | Wholesale & retail | 2024 |
| Social Holdings Limited | Hospitality | 2024 |
| Social Media Consulting Limited | Administrative & support | 2010 |
| Spectrum Paint Limited | Other services | 2016 |
| Spero Properties Limited | Real estate | 2003 |
| Spring Easy Limited | Professional & scientific | 2014 |
| Springbridge Corporation Limited | Administrative & support | 2007 |
| SS Sheth Holdings Limited | Other services | 2025 |
| SS Sheth Investments Limited | Other services | 2024 |
| ST Peters Street Property Limited | Construction | 2023 |
| STS Developments Ltd | Construction | 2016 |
| Sulymah Trading Company Limited | Other services | 2018 |
| Sun 2 Energy Limited | Construction | 2026 |
| Suneeta London Limited | Professional & scientific | 2019 |
| T'S World Foods, Alcohol and Tobacco Imports Ltd | Wholesale & retail | 2018 |
| Tacit Fusion Limited | Professional & scientific | 2009 |
| Tali Investments Ltd | Real estate | 2018 |
| Technix Engineering Limited | Construction | 2002 |
| THE Beauty DEN (Flitwick) Ltd | Other services | 2025 |
| THE Club House Social Limited | Administrative & support | 2025 |
| THE Electrician (Greenfield) Limited | Construction | 2010 |
| THE Glenaden Distilling Company Limited | Wholesale & retail | 1999 |
| THE Kite Partnership Limited | Real estate | 2015 |
| THE Little English Baby Company Limited | Wholesale & retail | 2018 |
| THE Millbrook Golf (Trading) Limited | Arts & recreation | 2016 |
| THE Millbrook Golf Club Limited | Arts & recreation | 2002 |
| THE PR Practice Ltd | Professional & scientific | 2010 |
| THE Rijn Company Limited | Other services | 2024 |
| THE Store With More Limited | Wholesale & retail | 1994 |
| THE Words Workshop Limited | Professional & scientific | 2004 |
| Tipe Consultancy Limited | Information & communication | 2013 |
| Tour Pack Ltd | Administrative & support | 2019 |
| Tower Building and Development Ltd | Construction | 2023 |
| Tower Lifts (UK) Limited | Construction | 2015 |
| Trafford Facilities Limited | Financial services | 1958 |
| Traffords Limited | Financial services | 1981 |
| TRI Line Sports Marketing Limited | Arts & recreation | 2004 |
| Tribe Hospitality Limited | Other services | 2024 |
| Twin Sockets Ltd | Construction | 2023 |
| UK Business Recovery Limited | Other services | 2025 |
| Vehicle Finance Specialists Ltd | Financial services | 2025 |
| VJS Projects Limited | Construction | 2010 |
| Walter Gurney & SON Limited | Financial services | 1932 |
| Wise Turtle Consultancy Limited | Real estate | 2017 |
| Woburn Street Financial Planning Limited | Financial services | 2020 |
| Woodcock Transport Ltd | Transport & logistics | 2008 |
| Wooden Hill Coffee Company Limited | Manufacturing | 2015 |
| Workshop Spaces Limited | Real estate | 2025 |