| Magjam Limited | Professional & scientific | 2016 |
| Mains Away LLP | | 2024 |
| Malki Web Design Ltd | Information & communication | 2024 |
| Maple Gardens MGT Company Ltd | Households | 2018 |
| Mayfield Barns Management Company Ltd | Households | 2014 |
| Mcdougall Architects Ltd | Professional & scientific | 2016 |
| MDG Business Associates Limited | Professional & scientific | 2021 |
| Metamorfosis Limited | Professional & scientific | 2005 |
| Morris and Saunders Limited | Construction | 2021 |
| Morris Property UK Group Ltd | Real estate | 2015 |
| Motiq Limited | Wholesale & retail | 2014 |
| N. a. C. E. Limited | Other services | 2001 |
| Neville Rowe Solutions Ltd | Information & communication | 2016 |
| Newbury Farm Plants Limited | Wholesale & retail | 2006 |
| North HT Rent Limited | Real estate | 2024 |
| Northtech Services Limited | Professional & scientific | 2024 |
| O & M Technical Services Limited | Professional & scientific | 2015 |
| Oakridge New Homes Ltd | Construction | 2018 |
| OKE Fums Limited | Professional & scientific | 2023 |
| Orisha Housing CIC | Other services | 2019 |
| OSM Ventures Limited | Information & communication | 2018 |
| Over and Beyond Limited | Extraterritorial | 2019 |
| P & H Homes LLP | | 2017 |
| Page Character Limited | Administrative & support | 1991 |
| PD Simpson Specialist Gynaecology Care Limited | Health & social care | 2023 |
| Peach T.V Ltd. | Information & communication | 2001 |
| Pembridge Land Group Limited | Real estate | 2021 |
| Peter Bell Electronics Ltd | Professional & scientific | 2025 |
| Peter H. Wright & SON (Plumbing & Heating) Limited | Construction | 1977 |
| Pilsworth Court Management Co Ltd | Real estate | 2025 |
| Pintl Retail Maintenance Ltd | Manufacturing | 2018 |
| Precise Carpentry and Timber Frame Limited | Construction | 2025 |
| Private ENT Surgery Ltd | Health & social care | 2012 |
| Project Services Associates Ltd | Information & communication | 2009 |
| PSL Commercial Ltd | Real estate | 2024 |
| PYB Farm Limited | Agriculture & fishing | 2020 |
| Q-Log Consulting Limited | Professional & scientific | 2005 |
| Quantri Limited | Information & communication | 2020 |
| Quenby Support Services Limited | Professional & scientific | 2019 |
| Raeside Associates Limited | Real estate | 2010 |
| RBW Communications Limited | Professional & scientific | 2020 |
| RC Luton Company Ltd | Administrative & support | 2017 |
| Real Talent Solutions Ltd | Administrative & support | 2024 |
| Regent Street Commercial Ltd | Real estate | 2025 |
| Regent Street Holdings Ltd | Real estate | 2025 |
| Regent Street Property Limited | Real estate | 2021 |
| Regular Locum Services Ltd | Wholesale & retail | 2020 |
| Reservoir View Ltd | Professional & scientific | 2013 |
| Revops Recruitment Ltd | Administrative & support | 2023 |
| Reynolds SRC Limited | Professional & scientific | 1999 |
| Rhode to Nowhere Ltd | Professional & scientific | 2020 |
| RIO DE ORO Ltd | Real estate | 2017 |
| Road Runners Limited | Extraterritorial | 1987 |
| ROB Ward Consulting Limited | Professional & scientific | 2010 |
| Rockday Limited | Professional & scientific | 2023 |
| Roma Caravans Limited | Manufacturing | 2004 |
| Roney Limited | Education | 2020 |
| RT Rental Properties Limited | Real estate | 2022 |
| Rufuz Ltd | Professional & scientific | 2021 |
| S2J Consultants Limited | Professional & scientific | 2025 |
| S7ONETECH Limited | Professional & scientific | 2014 |
| Sakamain Ltd | Professional & scientific | 2018 |
| Saveenergy Ltd | Extraterritorial | 2020 |
| Saveenergy-Now Ltd | Administrative & support | 2010 |
| Sbsl Developments Limited | Real estate | 2014 |
| SCK Remediation Consultancy Limited | Water & waste | 2025 |
| Scola's Limited | Hospitality | 2019 |
| Scott IT Sutton Limited | Professional & scientific | 2024 |
| Sepr Change Consultancy Ltd | Information & communication | 2025 |
| Setter Limited | Manufacturing | 1997 |
| Setter Surfaces Ltd | Construction | 2021 |
| Silsoe Livestock Systems Limited | Professional & scientific | 2005 |
| Sjay Car Care Ltd | Wholesale & retail | 2019 |
| SLW Driving Limited | Education | 2020 |
| Sock Academy Ltd | Manufacturing | 2006 |
| Southampton Student Developments Ltd | Real estate | 2018 |
| Spavmc Holdings Ltd | Real estate | 2024 |
| Spinks Creative Limited | Professional & scientific | 2020 |
| Sprint Convergence Limited | Information & communication | 2009 |
| Squatch Limited | Wholesale & retail | 2019 |
| Starvel Consulting Ltd | Professional & scientific | 2022 |
| Sterling Sports Management Ltd | Other services | 2017 |
| Stewart Edgar Advisory Limited | Professional & scientific | 2018 |
| Stndrd Inc Limited | Information & communication | 2024 |
| Stone-Style (UK) Limited | Construction | 2008 |
| Studio Louca LLP | | 2024 |
| Summit Contract and Project Management Limited | Professional & scientific | 2025 |
| Sun Hill Advisory Limited | Professional & scientific | 2019 |
| Swords Properties Ltd | Construction | 2016 |
| T-Bun Entertainment Ltd | Professional & scientific | 2023 |
| T.M. West & SON (Contracts) Limited | Construction | 2013 |
| Taylor Morris Ltd | Financial services | 2013 |
| TC Support Limited | Health & social care | 2020 |
| Tccs Consulting Limited | Professional & scientific | 2017 |
| THE Alchemist Group Limited | Real estate | 2001 |
| THE Alchemist Studio Limited | Administrative & support | 2014 |
| THE Content Room Ltd | Financial services | 2024 |
| THE Dress House Ltd | Wholesale & retail | 2015 |
| THE Floating Fender Company Limited | Construction | 2002 |
| THE Mortgage Expert Group Limited | Financial services | 2018 |