| Modo's Cuisine Ltd | Manufacturing | 2022 |
| Moonlane Limited | Construction | 1988 |
| Mophire Limited | Administrative & support | 2024 |
| Mossford Limited | Construction | 1988 |
| Movers East London Limited | Real estate | 2020 |
| MPM Ltd | Construction | 2008 |
| MQD Quant Ltd | Information & communication | 2025 |
| MR Chrono Limited | Wholesale & retail | 2015 |
| Mulhat Limited | Health & social care | 2021 |
| Muzda Stratford Limited | Manufacturing | 2017 |
| National Academy of Healthcare Management Limited | Education | 2021 |
| National Centre for Leadership Management Limited | Extraterritorial | 2020 |
| National College of Education Limited | Extraterritorial | 2020 |
| Newham Health Collaborative CIC | Health & social care | 2016 |
| Nortonhall Estates Ltd | Construction | 2004 |
| Nottingham Rehab Limited | Wholesale & retail | 1985 |
| November Ventures Ltd | Administrative & support | 2019 |
| NRS Healthcare Limited | Other services | 2018 |
| NW3 Films Limited | Information & communication | 2004 |
| Oyedele Isaac Odeniran Property Portfolio Holdings Limited | Real estate | 2016 |
| Paragon Interior Furniture Ltd | Manufacturing | 1989 |
| Parwan London Limited | Wholesale & retail | 2018 |
| Passion's Boutique Ltd | Wholesale & retail | 2025 |
| Patrick AA Properties Ltd | Real estate | 2021 |
| Peopled Limited | Administrative & support | 2021 |
| Performance Reinvention Ltd | Professional & scientific | 2020 |
| Pharmacy Expert Limited | Professional & scientific | 2010 |
| Planned Installations Limited | | 1981 |
| Plus Academy Mentorship CIC | Administrative & support | 2025 |
| PM Education and Consultancy Services Ltd | Education | 2025 |
| Portico Advisers Ltd | Professional & scientific | 2025 |
| Preville-Findlay Development Ltd | Education | 2016 |
| Print House Bar Ltd | Hospitality | 2019 |
| Promarketing Consultancy Limited | Professional & scientific | 2000 |
| Prometheus FSS Ltd | Public administration | 2022 |
| Prop Solve-It Limited | Information & communication | 2015 |
| Proquo AI Limited | Professional & scientific | 2015 |
| Proritas Health Care Professionals Ltd | Health & social care | 2019 |
| QIP Straits Operator Limited | Professional & scientific | 2025 |
| QIP UK ERM Limited | Financial services | 2025 |
| Quality Development and Training Consultancy Limited | Professional & scientific | 2016 |
| Quattro (EBT) Limited | Administrative & support | 2021 |
| Quattro Group Limited | Construction | 2013 |
| R3 Lounge Limited | Hospitality | 2023 |
| Radu Manolachi Limited | Health & social care | 2021 |
| Raymond Marketing UK Limited | Administrative & support | 2017 |
| RB Associates | | 1994 |
| Realest Crowd Ltd | Real estate | 2017 |
| Redmayne Investment Limited | Financial services | 2025 |
| Rejuvenate Academy Ltd | Health & social care | 2022 |
| Rejuvenateclinic.London Ltd | Professional & scientific | 2017 |
| Retford International (NO 1) Limited | Construction | 1989 |
| Richard Burns Ltd | Professional & scientific | 2025 |
| Robert Fraser (Grantham) Limited | Administrative & support | 1987 |
| Robert Fraser (Little Hampton) Limited | Construction | 1987 |
| Robert Fraser (Swanley) Limited | Construction | 1987 |
| Robert Fraser Nineteenth Development Company Limited | Construction | 1989 |
| Robert Fraser Sixteenth Development Company Limited | Administrative & support | 1989 |
| Robert Fraser Sixth Development Company Limited | Construction | 1988 |
| Robert Fraser Twentieth Development Company Limited | Construction | 1989 |
| Robert Fraser Twenty-First Development Company Limited | Construction | 1989 |
| Robert Fraser Twenty-Fourth Development Company Limited | Construction | 1989 |
| ROY & Associates Limited | Information & communication | 2014 |
| S&P Precision Team Ltd | Construction | 2014 |
| S.I.Commissioning Ltd | Professional & scientific | 2022 |
| S24 Homes Ltd | Real estate | 2025 |
| Saaff Properties Ltd | Real estate | 2022 |
| Samerise Limited | Construction | 1987 |
| Sanstone Limited | Construction | 1989 |
| Sasa 2015 Ltd | Hospitality | 2015 |
| Securefirst Security Ltd | Administrative & support | 2025 |
| Selit Care Ltd | Transport & logistics | 2019 |
| Sher ALI Traders Ltd | Transport & logistics | 2020 |
| Sherperd & Co Limited | Professional & scientific | 2010 |
| Sherperd Financial Ltd | Real estate | 2021 |
| Sherperd Ventures Limited | Real estate | 2021 |
| Sierra Artemis Limited | Professional & scientific | 2019 |
| Signonero Consultants Ltd | Professional & scientific | 2014 |
| Sky Nails & Spa (KY) Limited | Other services | 2019 |
| Skyll Consulting Ltd | Information & communication | 2016 |
| Solid Speed Productions Limited | Information & communication | 2014 |
| Solutions for Communities | Health & social care | 2006 |
| Southfields Business Park Management Limited | Real estate | 1988 |
| Sparkletrum Consultancy Limited | Education | 2014 |
| Splendid Effect Limited | Construction | 2019 |
| SS EVE Ltd | Hospitality | 2023 |
| Sterling Property Developments Limited | Construction | 1994 |
| Sterling Property Holdings Limited | Administrative & support | 2001 |
| Sterling Property Trust Limited | Other services | 1994 |
| Store First Newco Limited | Construction | 2010 |
| Stratford Burger Trading Limited | Hospitality | 2019 |
| Stratford Cleaning Services Limited | | 1984 |
| Stratford DRY Cleaners Limited | Other services | 2013 |
| Stratford East (Trading) Limited | Hospitality | 1995 |
| Stratford East London Developments Limited | Financial services | 2021 |
| Stratford Hand Car Wash Limited | Wholesale & retail | 2025 |
| Stratford Links Ltd | Administrative & support | 2023 |
| Stratford Waterfront Retail Management Company Limited | Hospitality | 2023 |
| Suffolk Park Limited | Real estate | 2023 |
| Sunrise Food London Limited | Hospitality | 2019 |