| Moving Print Distribution Limited | Extraterritorial | 2011 |
| Mslm Barbers Ltd | Other services | 2026 |
| MTC Learning | Education | 1988 |
| Nail Tailoring Ltd | Manufacturing | 2021 |
| Nails Studio 6666 Ltd | Other services | 2022 |
| NAZ Hariri Ltd | Manufacturing | 2019 |
| Never Stop Trying Limited | Other services | 2026 |
| New Sequent Limited | Financial services | 2017 |
| Newtech Heating Spares Limited | Construction | 1989 |
| NGN22 Ltd | Construction | 2022 |
| NJ Payne Investments Limited | Real estate | 2024 |
| Northbold Timber Agency Ltd | Wholesale & retail | 2021 |
| Nworbc Limited | Extraterritorial | 2017 |
| Ocean Air Accountants Limited | Professional & scientific | 2013 |
| Officers(Merchant Navy)Federation Limited | | 1928 |
| One North Cumbria Limited | Construction | 2018 |
| One Stop Group Limited | Wholesale & retail | 2006 |
| Openlink Developments Limited | Real estate | 2005 |
| Optim Estate Ltd | Construction | 2020 |
| O’Leary Investments Limited | Real estate | 2022 |
| P.C. Fisher Limited | Real estate | 1994 |
| P.O.P. Finishing Limited | Extraterritorial | 2011 |
| P.R. Fleet Services Limited | Wholesale & retail | 1982 |
| Palm Tree (London) Investments Limited | Administrative & support | 2019 |
| Party and Personalisation Ltd | Wholesale & retail | 2021 |
| Pass J. Holdings Limited | Transport & logistics | 1985 |
| PCM Capital Limited | Financial services | 2015 |
| Peak Property Management and Maintenance Limited | Real estate | 2006 |
| Pearson's Investments LLP | | 2020 |
| Peart Enterprises Ltd | Real estate | 2021 |
| Penny POT Enterprises Limited | Professional & scientific | 2014 |
| Penny POT Hall Classics Limited | Wholesale & retail | 2021 |
| Penny POT Lettings Limited | Real estate | 2021 |
| Peri-Peri Restaurants Ltd | Hospitality | 2014 |
| Perky Blenders Coffee Bars Ltd | Hospitality | 2017 |
| Perky Blenders Coffee Roasters Ltd | Manufacturing | 2015 |
| Perpetual Trading Ltd | Other services | 2018 |
| Petong Ltd | Construction | 2020 |
| Philippine Gold Limited | Mining & quarrying | 1960 |
| Philomena Francis Ltd | Health & social care | 2023 |
| Phoenix Santiago Publishing Ltd | Information & communication | 2021 |
| PIN2025 Limited | Professional & scientific | 2025 |
| PMA Accountants Limited | Professional & scientific | 2005 |
| Polaris Capital (One) Limited | Financial services | 2014 |
| Polaris Capital Limited | Professional & scientific | 2014 |
| Polledri Investments Limited | Financial services | 2022 |
| Pphc LLP | | 2022 |
| Pratica Ltd | Professional & scientific | 2019 |
| Preet Landscapers Ltd | Construction | 2022 |
| Premier Security Ballistic & Blast Ltd | Manufacturing | 2008 |
| Premier SS Limited | Construction | 2000 |
| PRF Holdings Limited | Financial services | 2024 |
| Primary Care Estates Limited | Real estate | 2018 |
| Primary Learning Studio Ltd | Information & communication | 2026 |
| Pristine Classic Cars Limited | Wholesale & retail | 2022 |
| Protecta Screen Europe Limited | Wholesale & retail | 2020 |
| Protecta Screen Holdings Limited | Financial services | 2020 |
| Quiver Tree Ventures Limited | Information & communication | 2025 |
| Radionics Healing Devices Distribution UK Ltd | Wholesale & retail | 2018 |
| RAK Plumbing and Heating Ltd | Construction | 2018 |
| Rashmi Metaliks UK Limited | Wholesale & retail | 2023 |
| Reactive Digital Media Ltd | Professional & scientific | 2022 |
| Rear of 61 Lawrie Park Road Ltd | Construction | 2023 |
| Reframe Capital Limited | Other services | 2020 |
| Renga Technologies Limited | Information & communication | 2021 |
| Renip House Limited | Extraterritorial | 2000 |
| RLR MOT Ltd | Education | 2024 |
| RMS Optical Limited | Administrative & support | 2023 |
| Root One Capital Limited | Construction | 2024 |
| Royle Symphony Limited | Administrative & support | 2016 |
| Russnick Enterprises Limited | Financial services | 2020 |
| Russnick Group Limited | Financial services | 2025 |
| Safeco Ltd | Other services | 2019 |
| Safeco Trading Ltd | Wholesale & retail | 2020 |
| Saffron Bespoke Homes Limited | Construction | 2014 |
| Sakura Leadership Limited | Professional & scientific | 2020 |
| Samera Hair & Beauty Ltd | Other services | 2018 |
| Samm Maintenance Limited | Households | 2025 |
| Seif Care Ltd | Health & social care | 2017 |
| Sfcl Limited | Professional & scientific | 2024 |
| SGP Medical Limited | Health & social care | 2019 |
| Site Contracting Services Limited | Construction | 2020 |
| Sky Services London Ltd | Hospitality | 2020 |
| Skytech Venture Ltd | Transport & logistics | 2024 |
| Snapcart Traders Ltd | Wholesale & retail | 2025 |
| South East Women’S Team Limited | Arts & recreation | 2018 |
| SRD Build Limited | Construction | 2018 |
| SRM Innovative Solutions Ltd | Information & communication | 2016 |
| Sshj Limited | Real estate | 2017 |
| SSS Developments Ltd | Construction | 2023 |
| Stanhope Estate Management Ltd | Real estate | 2022 |
| Streeters Holdings Limited | Administrative & support | 1999 |
| Suckerpunch Recordings Limited | Information & communication | 2024 |
| Surevendor Ltd | Wholesale & retail | 2024 |
| SV Automotive Limited | Wholesale & retail | 2024 |
| Swain Investments Limited | Other services | 1998 |
| SY HRS Limited | Administrative & support | 2020 |
| T&C Pearson Construction Limited | Construction | 2020 |
| Taylor Made Beauty Limited | Professional & scientific | 2013 |
| Tehmou Ltd | Information & communication | 2014 |