| Molut Advance Care Ltd | Health & social care | 2022 |
| Morgan Ellis Electrical Limited | Construction | 2019 |
| Mortlake House RTM Company Limited | Households | 2020 |
| Murphy Made Bespoke Ltd | Manufacturing | 2025 |
| N.K.R. RTM Company Limited | Real estate | 2007 |
| Nails Bar Ltd | Other services | 2024 |
| NAL Associates Ltd | Other services | 2013 |
| Nardi Management Ltd | Real estate | 2022 |
| Neighbour NET Limited | Information & communication | 1999 |
| Neighbourfoods Ltd | Manufacturing | 2021 |
| NET Digital Solutions Limited | Information & communication | 2011 |
| NET Options Limited | Information & communication | 2011 |
| NO 1 Devonshire Gardens Management Limited | Households | 2006 |
| NO1 First AID Instructors Limited | Education | 2016 |
| Novi DOM Housing Support CIC | Real estate | 2022 |
| Nungwi Ltd | Real estate | 2020 |
| Oakmere Partners Limited | Professional & scientific | 2025 |
| Ocmh Ltd | Information & communication | 2024 |
| Ocuco (UK) Limited | Information & communication | 1998 |
| Ocuco Limited | Information & communication | 1996 |
| Ohhbabies Limited | Wholesale & retail | 2022 |
| Oktagon Ltd | Construction | 2022 |
| One Hundred Knightsbridge Ltd | Financial services | 2010 |
| Opalfast Limited | Transport & logistics | 1986 |
| Orange Connex Global UK Limited | Transport & logistics | 2021 |
| Orange Connex Supply Chain UK Limited | Transport & logistics | 2021 |
| Organics Web Ltd | Information & communication | 2012 |
| Overton Lettings and Management Limited | Real estate | 2004 |
| P.J.Software Limited | Information & communication | 1993 |
| Park Sports Limited | Arts & recreation | 1991 |
| Pastel Developments Limited | Construction | 2012 |
| Patch Plays Limited | Arts & recreation | 2020 |
| Paul Fraser Ltd | Administrative & support | 2024 |
| Paws in Work Ltd | Other services | 2018 |
| Peloton Analytics Limited | Professional & scientific | 2017 |
| Percepta UK Limited | Administrative & support | 2000 |
| Permanent Wealth LLP | | 2021 |
| Petrex (London) Limited | Other services | 1979 |
| Philsowna Ltd | Real estate | 2021 |
| Physioedge Limited | Health & social care | 2006 |
| Pink Orchid Therapies Ltd | Health & social care | 2023 |
| Play Giggle and Grow Ltd | Health & social care | 2026 |
| Playzido Limited | Other services | 2017 |
| Pocko Limited | Real estate | 1999 |
| Poison IVY Beauty Ltd | Other services | 2019 |
| Practice Management Solutions (Midlands) Limited | Information & communication | 2010 |
| Prefab Limited | Households | 1980 |
| Prenci Group Ltd | Construction | 2026 |
| Prenci Motors Ltd | Wholesale & retail | 2026 |
| Pro IT Solutions Ltd | Information & communication | 2018 |
| Procopio Technologies Ltd | Information & communication | 2014 |
| Q&M Groundworks Ltd | Construction | 2025 |
| R&M Property Development and Rentals Ltd | Real estate | 2023 |
| Rainbow Nursery Schools Ltd | Education | 2016 |
| Rated Roofing Services Ltd | Construction | 2024 |
| Real Kerr Limited | Real estate | 2003 |
| Reliant LDN Ltd | Construction | 2019 |
| Revered Finance Limited | Financial services | 2026 |
| Ritti Limited | Health & social care | 2016 |
| Rizkana Homes UK Limited | Real estate | 2025 |
| RKS Digital Ltd | Information & communication | 2024 |
| RMS Cosec Associates Limited | Other services | 2001 |
| Rmsk Ltd | Health & social care | 2013 |
| Royalstar Ltd | Wholesale & retail | 2022 |
| Rustic Journey Furniture Wholesale Ltd | Wholesale & retail | 2020 |
| Sacre Kerr Ltd | Real estate | 2022 |
| Sales Velocity Group Limited | Professional & scientific | 2025 |
| SAU Care Ltd | Health & social care | 2015 |
| Savoy Marketing Limited | | 1984 |
| Seadanse Properties Limited | Real estate | 1962 |
| Service Link Engineering Ltd | Other services | 2012 |
| Sesona Hill House Ltd | Energy | 2022 |
| Seventeen Fauconberg Road Residents Limited | Households | 1996 |
| SEW ME Sunshine Ltd | Wholesale & retail | 2017 |
| Shanti Shanti Limited | Administrative & support | 2009 |
| Sharehause Ltd | Real estate | 2026 |
| Sharon O'Connor Ltd | Administrative & support | 2014 |
| Silverring Ltd | Professional & scientific | 2022 |
| Simply Cleaning Services Ltd | Administrative & support | 2026 |
| Skmm Associates Limited | Professional & scientific | 2009 |
| Smart Technic Ltd | Manufacturing | 2025 |
| SN & AH Swaffham Ltd | Real estate | 2019 |
| SN Gravel Ltd | Real estate | 2018 |
| SN Langley Ltd | Real estate | 2018 |
| SN Tulum Ltd | Real estate | 2019 |
| Snph Ashford Hill Ltd | Real estate | 2020 |
| Solutions Property Maintenance Ltd | Administrative & support | 2025 |
| Spacebound Ltd | Wholesale & retail | 2025 |
| Spectre Nightlife Ltd | Other services | 2024 |
| Speude Bradeos Ltd | Other services | 2013 |
| Square Mile Capital Limited | Real estate | 2014 |
| Stacie Properties Ltd | Real estate | 2025 |
| Stocks & Property Ltd | Real estate | 2016 |
| Stones Developers Ltd | Real estate | 2022 |
| Strand Cafe and Thai Limited | Hospitality | 2026 |
| Stravitas Partners Ltd | Professional & scientific | 2025 |
| Studio Inenaga Ltd | Professional & scientific | 2024 |
| SW6 Developments Limited | Real estate | 2025 |
| Syon Homes (CR0) Limited | Real estate | 2018 |
| Take Kerr Ltd | Real estate | 2021 |