| Michal Restaurants Ltd | Hospitality | 2015 |
| Millionaire Properties Ltd | Real estate | 2021 |
| Miracle Coffee Shop Limited | Hospitality | 2008 |
| MKB Care Ltd | Health & social care | 2019 |
| Mocha Box Limited | Other services | 2014 |
| Molyneux Limited | Professional & scientific | 2014 |
| Monika Restaurants Ltd | Hospitality | 2016 |
| Monster Gym Limited | Extraterritorial | 2013 |
| Monster Gymnasium Limited | Arts & recreation | 2005 |
| Monster Health and Fitness Limited | Extraterritorial | 2008 |
| Mouse Training London Ltd | Construction | 2018 |
| Movers and Shakers Partnerships Limited | Administrative & support | 2024 |
| MP Finance & Consultancy Ltd | Professional & scientific | 2013 |
| MPR Security Services Ltd | Administrative & support | 2025 |
| MR. Dips Ltd | Wholesale & retail | 2009 |
| MSM Estates Limited | Construction | 2008 |
| MVP (UK) Limited | Information & communication | 2012 |
| My-Fx-World.Com Limited | Administrative & support | 2023 |
| Nafie Muhlemann Childcare Ltd | Health & social care | 2017 |
| Nashmills Heating Ltd | Construction | 2019 |
| Natasha Lazari Ltd | Professional & scientific | 2016 |
| Nccuk Ltd | Administrative & support | 2024 |
| Nemo Barbers Ltd | Other services | 2023 |
| Network Management & Services Ltd | Administrative & support | 2022 |
| New Forest Design Ltd | Professional & scientific | 2024 |
| NL Dentistry Ltd | Health & social care | 2018 |
| NL Developments Ltd | Agriculture & fishing | 2022 |
| Nlpg Ltd | Construction | 2015 |
| Nobul Promotions Limited | Professional & scientific | 2007 |
| Norsta Story Limited | Professional & scientific | 2025 |
| North London Laboratory Limited | Other services | 2020 |
| Oaktree Property Investments Limited | Construction | 2017 |
| Oakview Window Company Limited | Construction | 2008 |
| OC353080 LLP | | 2010 |
| Oganbor Properties Services Ltd | Real estate | 2022 |
| Olimpjan Construction Ltd | Construction | 2025 |
| Omega 1 Associates Limited | Professional & scientific | 2013 |
| On-Set Camera Solutions Limited | Information & communication | 2018 |
| Oneleg Promotions Limited | Arts & recreation | 2018 |
| Only Waste Arjan Ltd | Water & waste | 2021 |
| Optime Strategies Limited | Information & communication | 2002 |
| Optimus Alliance Limited | Information & communication | 2025 |
| Orange Pekoe Limited | Hospitality | 2005 |
| Origins Property Investments Ltd | Financial services | 2019 |
| Ossie Barbers Ltd | Other services | 2014 |
| OZ Aksu Meze & Grill Limited | Hospitality | 2016 |
| OZ Strategic Limited | Professional & scientific | 2017 |
| Ozyigit Investment Limited | Households | 2019 |
| P P H S London Limited | Construction | 2016 |
| P&F Acorns Limited | Financial services | 2016 |
| P.T.S. Autos Limited | Wholesale & retail | 2009 |
| Pact Properties Limited | Real estate | 2002 |
| Pancreas Group.Org Ltd | Professional & scientific | 2019 |
| Panmode Limited | Real estate | 2024 |
| Papadopoulos Ltd | Health & social care | 2023 |
| Paperlibrary Limited | Manufacturing | 2014 |
| Park Royal Timbers Limited | Wholesale & retail | 2000 |
| Parma Medics Ltd | Hospitality | 2022 |
| PAS2 Investments UK Limited | Real estate | 2019 |
| Paschali Investments Limited | Real estate | 2013 |
| Pavlis Shopfitting Limited | Construction | 2013 |
| Pentagon Paint & Body Limited | Wholesale & retail | 2003 |
| PH Medical UK Limited | Other services | 2015 |
| Philip Alexander Limited | Real estate | 2017 |
| Philips Town Services Ltd | Construction | 2024 |
| Pinpoint Facilities Services Limited | Real estate | 2013 |
| Plain Foods Limited | Wholesale & retail | 2008 |
| POP C! Ltd | Administrative & support | 2016 |
| Portion of Chips Ltd | Hospitality | 2020 |
| Pregio Holland Park Ltd | Wholesale & retail | 2024 |
| Pregio Ltd | Wholesale & retail | 2023 |
| Prestige Process Management Limited | Professional & scientific | 2016 |
| Prestine Automotives Ltd | Wholesale & retail | 2024 |
| Prima Refurbishment Limited | Construction | 2017 |
| Prime Refurbishments Ltd | Construction | 2015 |
| Proformance Motorsport Limited | Extraterritorial | 2012 |
| Project-Video Touring Limited | Information & communication | 2014 |
| Pump Lifestyle Limited | Wholesale & retail | 2013 |
| Pure Page Limited | Wholesale & retail | 2016 |
| Qualifind Ltd | Professional & scientific | 2018 |
| Quality Trades Network Ltd | Real estate | 2020 |
| R&S Pharma Limited | Wholesale & retail | 2017 |
| R.S.W Logistics Ltd | Transport & logistics | 2024 |
| Ramsey London Limited | Extraterritorial | 2006 |
| RAP on Demand Limited | Wholesale & retail | 2015 |
| Ravenfield Chippy Ltd | Hospitality | 2026 |
| Recuva Estates Limited | Real estate | 2024 |
| Reepro Ltd | Water & waste | 2019 |
| Regensphere Ltd | Professional & scientific | 2025 |
| Renato Prifti Electrical Limited | Construction | 2017 |
| Restaurant Tech Limited | Information & communication | 2016 |
| RM One Hair Limited | Other services | 2018 |
| RN Consult Limited | Professional & scientific | 2009 |
| Roni Lofts Conversion Ltd | Construction | 2020 |
| Root DB Ltd | Health & social care | 2025 |
| Rouphael Ltd | Hospitality | 2018 |
| RR M&E Ltd | Construction | 2024 |
| RTB House Latam Ltd | Wholesale & retail | 2017 |
| S & D Stores Limited | Wholesale & retail | 2005 |
| S&K Investment Property Ltd | Real estate | 2019 |