| Markstate Limited | Construction | 1963 |
| Marson Building Ltd | Real estate | 2021 |
| Mary Spender Ltd | Arts & recreation | 2020 |
| Mcbride Electrical Services Limited | Construction | 2015 |
| Medivents Limited | Professional & scientific | 2005 |
| Melanie Giles Hairdressing Limited | Other services | 2008 |
| Mill Green Park Number 2 (Congleton) Management Company Limited | Households | 2005 |
| Minals Limited | Wholesale & retail | 2004 |
| MIT Health Safety & Environment Limited | Public administration | 2014 |
| MK Vehicle Repairs Ltd | Wholesale & retail | 2018 |
| MMM Homes Ltd | Real estate | 2016 |
| Modern HUT Ltd | Real estate | 2022 |
| Monocolour ID Ltd | Real estate | 2021 |
| Morgan Talent Management Limited | Arts & recreation | 2021 |
| Morrison & Plant Ltd | Real estate | 2025 |
| Moryaa Limited | Wholesale & retail | 2019 |
| Mosely and Williamson Ltd | Real estate | 2021 |
| MS Number Crunchers Ltd | Professional & scientific | 2025 |
| MSH Property Holdings Limited | Construction | 2023 |
| MW Advisors Limited | Professional & scientific | 2018 |
| MW Motorz Ltd | Wholesale & retail | 2024 |
| Mydigi Data Ltd | Information & communication | 2025 |
| N-Tec Limited | Manufacturing | 1996 |
| N.E Heavy Lifting Gear Limited | Manufacturing | 2023 |
| Neal Display Holdings Limited | Manufacturing | 2019 |
| Neha Associates Limited | Health & social care | 2010 |
| NEO WTR Limited | Wholesale & retail | 2023 |
| Nexgen Creators Limited | Wholesale & retail | 2025 |
| Nexora Systems Ltd | Construction | 2025 |
| Niveau Ltd | Administrative & support | 2020 |
| NJ Electrical Solutions Ltd | Construction | 2013 |
| Nmgp Holdings Ltd | Extraterritorial | 2018 |
| Noflies Limited | Real estate | 2013 |
| Northwood Group Ltd. | Construction | 2017 |
| O'B Barbers Limited | Other services | 2016 |
| Obsidian Creations Limited | Professional & scientific | 2014 |
| OGP Consulting Limited | Construction | 2020 |
| Ohmic Ltd | Administrative & support | 2023 |
| Ollie & Benjy Ltd | Hospitality | 2022 |
| Omnia Commercial Limited | Other services | 2020 |
| One Plus Power Ltd | Construction | 2019 |
| Onion Creators Limited | Wholesale & retail | 2025 |
| Ontheglist Ltd | Administrative & support | 2022 |
| Onyx Capital Technology Limited | Information & communication | 2022 |
| PBP Investments Ltd | Real estate | 2019 |
| PD1 Consultants Limited | Professional & scientific | 2013 |
| Pick One Services Limited | Administrative & support | 2017 |
| Pickard Works Limited | Professional & scientific | 2015 |
| Pinders B&B Limited | Hospitality | 2024 |
| Pizza in the Park Events Ltd | Hospitality | 2022 |
| Popcity Ltd | Construction | 2017 |
| Populair Limited | Real estate | 2016 |
| Portico Arts & Interiors Limited | Professional & scientific | 2017 |
| Potter & Reid Ltd | Hospitality | 2021 |
| Prct Bloodstocks Limited | Arts & recreation | 2024 |
| Premier Procurement Limited | Professional & scientific | 2000 |
| Pride & Joy Day Nursery Limited | Professional & scientific | 1997 |
| Prize Draw Operations Ltd | Administrative & support | 2021 |
| Pro Armour Ltd | Manufacturing | 2020 |
| Quality Choice Investments Ltd | Construction | 2022 |
| Quantum Agri Holdings Limited | Financial services | 2026 |
| Quistel Limited | Wholesale & retail | 2006 |
| R L Richardson (Electrical Contractor) Limited | Construction | 2003 |
| R2 Autobacs Ltd | Wholesale & retail | 2025 |
| Raffle Builders Limited | Construction | 2022 |
| Raising Standards Ltd | Professional & scientific | 2021 |
| Recognition One Limited | Administrative & support | 2013 |
| Red COW Consulting Limited | Information & communication | 2007 |
| RED51 Ltd | Wholesale & retail | 2013 |
| Refined Home Developments Limited | Manufacturing | 2026 |
| Revolution Co Agency Ltd | Professional & scientific | 2023 |
| REW Clothing Limited | Wholesale & retail | 2021 |
| Rhino Land Ltd | Real estate | 2015 |
| Ridgeline Roofing Services Ltd | Construction | 2024 |
| Risborough Garage Limited | Extraterritorial | 2014 |
| RLS Technical Services Ltd | Information & communication | 2015 |
| Rnas Dhillon Ltd | Financial services | 2018 |
| Ronay Kebab Limited | Hospitality | 2019 |
| Rose Court (Oxford) Management Company Limited | Households | 1989 |
| Roseline Limited | Transport & logistics | 2023 |
| Rova PAX Limited | Wholesale & retail | 2007 |
| Rsthetics Limited | Health & social care | 2020 |
| S.G. Auto Repairs Ltd | Wholesale & retail | 2016 |
| Sabr K. Ltd | Health & social care | 2023 |
| Sapia&Co UK PTY Ltd | Professional & scientific | 2021 |
| Sawa IMP and EXP Co., Ltd | Extraterritorial | 2024 |
| SBD Property Services Limited | Professional & scientific | 2005 |
| SC Civils Ltd | Construction | 2024 |
| Scis UK (Property) Limited | Real estate | 2020 |
| Sena Cyber Global Ltd. | Information & communication | 2017 |
| SES Transport Ltd | Administrative & support | 2025 |
| Shelton's Home Appliances Ltd | Wholesale & retail | 2016 |
| Shiekh Brothers Ltd | Wholesale & retail | 2026 |
| SHK Builders Ltd | Construction | 2022 |
| Shreeve Property Limited | Real estate | 2015 |
| Simonaco Ltd | Transport & logistics | 2022 |
| Simpson FOX Ltd | Professional & scientific | 2021 |
| Simran Chaggar Company Limited | Health & social care | 2019 |
| Singleton Jones Ltd | Wholesale & retail | 2021 |
| SKD 3 Limited | Professional & scientific | 2019 |