| Mashprop Limited | Real estate | 2019 |
| Mason & Co IT Consultancy Ltd | Wholesale & retail | 2022 |
| Matti Holdings Limited | Financial services | 2018 |
| Matti Property Company Limited | Real estate | 2016 |
| Mdll Dental Limited | Health & social care | 2017 |
| Meyven Corporation Ltd | Wholesale & retail | 2022 |
| MFS Casting Ltd | Information & communication | 2011 |
| Millennium & Copthorne (Austrian Holdings) Limited | Professional & scientific | 1999 |
| Millennium & Copthorne (Jersey Holdings) Limited | Professional & scientific | 2006 |
| Millennium & Copthorne Hotels Limited | Professional & scientific | 1994 |
| Millennium & Copthorne Pension Trustee Limited | Financial services | 2008 |
| Millennium & Copthorne Share Trustees Limited | Administrative & support | 1997 |
| Millennium Hotel Holdings Emea Limited | Professional & scientific | 2002 |
| Millennium Hotels & Resorts Services Limited | Professional & scientific | 2002 |
| Millennium Hotels (West London) Limited | Professional & scientific | 2013 |
| Millennium Hotels (West London) Management Limited | Hospitality | 2014 |
| Millennium Hotels Europe Holdings Limited | Professional & scientific | 2014 |
| Millennium Hotels Limited | Professional & scientific | 1995 |
| Millennium Hotels London Limited | Professional & scientific | 1999 |
| Momish Fitness LLP | | 2021 |
| Mpowered Training Limited | Professional & scientific | 2020 |
| MR Onsy Morris Limited | Health & social care | 2010 |
| Muzaki Limited | Health & social care | 2010 |
| MVP Root Education Group Ltd | Education | 2023 |
| My Lovely Lawn Limited | Administrative & support | 2020 |
| Mylem Ltd | Information & communication | 2018 |
| Natural Health Centre Limited | Wholesale & retail | 2006 |
| News Engineering Limited | Professional & scientific | 2003 |
| Nurse Innovations UK Limited | Health & social care | 2018 |
| OMG Energy Consultants Limited | Administrative & support | 2019 |
| Oncology Associates UK Ltd | Health & social care | 2010 |
| One Exclusive Entertainment Limited | Information & communication | 2018 |
| One More Burger Ltd | Hospitality | 2023 |
| Onlinetradesmen Limited | Information & communication | 2020 |
| Opus Deco Ltd | Wholesale & retail | 2018 |
| Orcan Intelligence Limited | Information & communication | 2013 |
| Organic Product Holding Ltd | Financial services | 2022 |
| Orta Clothing Limited | Manufacturing | 2021 |
| Ortega-Medina & Associates Limited | Professional & scientific | 2006 |
| Oslo Capital Ltd | Wholesale & retail | 2011 |
| P W Van Heerden Limited | Health & social care | 2008 |
| Pacem Holdings Limited | Real estate | 2026 |
| Paces Ahead Limited | Health & social care | 2004 |
| Pandora Dental Guidance and Support Ltd | Health & social care | 2020 |
| Passpaces Limited | Health & social care | 2010 |
| PBH Group Limited | Financial services | 2020 |
| PBH Therapy Services Limited | Health & social care | 2021 |
| PER Diem Products Ltd | Wholesale & retail | 2020 |
| Perception Limited & Co | | 1988 |
| Perfumer's Workshop Limited (the) | | 1981 |
| Peter Barry Surveyors Limited | Professional & scientific | 2015 |
| Phil Marsh Limited | Health & social care | 2021 |
| Pishel Consulting Ltd | Information & communication | 2022 |
| Planetvm.Net Ltd | Information & communication | 2021 |
| Platnova Ltd | Information & communication | 2023 |
| PMC Superannuation Investments PTY Ltd | | 2025 |
| Portobello Holdings Limited | Financial services | 2017 |
| Post Project Limited | Wholesale & retail | 2021 |
| Prime Capital Partners Limited | Extraterritorial | 2015 |
| Prime Logo Design Ltd | Wholesale & retail | 2025 |
| Primera Digital Ltd | Information & communication | 2022 |
| Profectus Consultancy International Ltd | Professional & scientific | 2021 |
| Property Maintenance and Cleaning Solutions Ltd | Administrative & support | 2020 |
| Protect Your Home Limited | Other services | 2015 |
| Pula GG Limited | Real estate | 2017 |
| Purasangre Limited | Construction | 2024 |
| R G S Dent Ltd | Health & social care | 2017 |
| Rakor Design & Productions Limited | Wholesale & retail | 2020 |
| Reach Media Sky LLP | | 2016 |
| Reel Flicks and Art Limited | Wholesale & retail | 2021 |
| Roka Dental Care Ltd | Health & social care | 2009 |
| SAM Brown Limited | Administrative & support | 2006 |
| Sarah Mcwilliams Limited | Health & social care | 2014 |
| SC Specialist Services Limited | Health & social care | 2026 |
| Scan Investments Limited | Real estate | 2015 |
| Scarletts Direct Products Pty.Limited | | 1991 |
| Seasons Properties Ltd | Real estate | 2013 |
| Sequoia London Developments Limited | Administrative & support | 2012 |
| Setuphero Limited | Professional & scientific | 2023 |
| Shash Stephen Ltd | Real estate | 2024 |
| Shawn Katz Ltd | Health & social care | 2013 |
| Shawn Katz Properties Limited | Real estate | 2020 |
| Sigmadent Limited | Health & social care | 2019 |
| Silent Explorers Limited | Wholesale & retail | 2018 |
| Singer Consulting Ltd | Professional & scientific | 2018 |
| Smart Collective Ltd | Professional & scientific | 2022 |
| Smart Hospital Solutions Ltd | Professional & scientific | 2025 |
| Smg-Mgmt Ltd | Professional & scientific | 2020 |
| Smile Hub Dental Group Limited | Health & social care | 2026 |
| Smilecare Holdings Limited | Financial services | 2021 |
| Smilecare Property Company Limited | Real estate | 2021 |
| Socks Expert Ltd | Wholesale & retail | 2023 |
| Southgate Surgical Ltd | Health & social care | 2018 |
| Southover Holdings Limited | Financial services | 2018 |
| Southover Orthodontics Limited | Health & social care | 2008 |
| Sparepenny Limited | Real estate | 2015 |
| Spearfin Limited | Financial services | 2021 |
| Spmc Investments Limited | Real estate | 2016 |
| ST Helena Trading (UK) Limited | Wholesale & retail | 2005 |
| ST Johns Wood Hire & Charters Ltd | Administrative & support | 2019 |