| Ponder Properties Limited | Construction | 2004 |
| POP UP London Ltd | Hospitality | 2024 |
| Posy & Wild Limited | Wholesale & retail | 2017 |
| Powell Renovations Ltd | Construction | 2025 |
| Powruk Properties Ltd | Real estate | 2021 |
| Presone Protection Ltd | Construction | 2026 |
| Pressed Makeup Ltd | Manufacturing | 2024 |
| Pretty Paws by Phoebe Limited | Wholesale & retail | 2020 |
| Prime Management & Consultancy Ltd | Construction | 2024 |
| Proseccopodevents Limited | Wholesale & retail | 2021 |
| Qacgco Ltd | Wholesale & retail | 2018 |
| QCC INT Limited | Wholesale & retail | 2022 |
| QDC Property Ltd | Real estate | 2017 |
| Quality Drainage Company Ltd | Other services | 2006 |
| Quick Access Scaffolds Ltd | Construction | 2025 |
| Quick Disposables Limited | Administrative & support | 2008 |
| R & M Firth Consulting Services Ltd | Professional & scientific | 2025 |
| R Hallas Conservation Ltd | Administrative & support | 2019 |
| Radnor Strategy Ltd | Professional & scientific | 2024 |
| Rail Safe Solutions (London) Limited | Professional & scientific | 2019 |
| RAP Accountancy Services Ltd | Professional & scientific | 2013 |
| Ravens Gardens Ltd | Administrative & support | 2019 |
| RAY Wooldridge Ltd | Other services | 2026 |
| RCH Beauty Ltd | Other services | 2024 |
| RCK Residentials Ltd | Real estate | 2022 |
| Reformd Limited | Arts & recreation | 2026 |
| Reloku Limited | Transport & logistics | 2018 |
| Retro Mini Gaming Ltd | Wholesale & retail | 2024 |
| Returno Ltd | Information & communication | 2026 |
| Richard Seddon Consultancy Ltd | Information & communication | 2021 |
| Richmond King Executive Travel Limited | Transport & logistics | 2024 |
| Rivercreek Ltd | Real estate | 2024 |
| Rj-Locke Electrical Limited | Construction | 2022 |
| Robust (Greenwich) Ltd | Construction | 2024 |
| Robust Developments Limited | Construction | 2005 |
| Robust Investments Ltd | Other services | 2021 |
| Robust New Homes Limited | Construction | 2018 |
| Robust Skeynes Barn Ltd | Construction | 2024 |
| Room 11 Creative LAB Ltd | Professional & scientific | 2024 |
| Room 11 Print LAB Ltd | Manufacturing | 2024 |
| Roquebrune Management Limited | Households | 2012 |
| RP London Electrical Ltd | Construction | 2020 |
| RRA Logistics Ltd | Transport & logistics | 2022 |
| RSG FM & Building Services Ltd | Construction | 2022 |
| Rudehealth.Ai Ltd | Health & social care | 2018 |
| Rumman Care Ltd | Health & social care | 2020 |
| Rural Retreat Essex Ltd | Real estate | 2025 |
| RWW Holdings Limited | Financial services | 2015 |
| Sacha Holdings Limited | Real estate | 2018 |
| Sachnik Ltd | Professional & scientific | 2016 |
| Safa Holdings Ltd | Health & social care | 2025 |
| Sage Property Management Ltd | Real estate | 2015 |
| Sandbay Construction Limited | Construction | 2017 |
| Sandbay Limited | Construction | 2010 |
| Sarah Brandish Bridal Ltd | Wholesale & retail | 2024 |
| Scott's Kitchen Limited | Hospitality | 2017 |
| Scrap Car Recovery Ltd | Water & waste | 2013 |
| Scube Limited | Information & communication | 2003 |
| Sean Fairman Design Ltd | Professional & scientific | 2023 |
| Sedd Co Ltd | Information & communication | 2025 |
| Seecap Limited | Extraterritorial | 2020 |
| Selectrics Electrical Contractors Limited | Construction | 2003 |
| Sevenoaks Construction Safety Limited | Construction | 2025 |
| Shan's Childcare Services Limited | Health & social care | 2023 |
| Shkl Builders & Construction Limited | Construction | 2018 |
| Shred Sleds Ltd | Manufacturing | 2021 |
| Sienna Bella Residential Ltd | Real estate | 2020 |
| Silverland Design and Build Ltd | Construction | 2024 |
| Sinead Gorey Ltd | Wholesale & retail | 2019 |
| Smartrsa Ltd | Professional & scientific | 2025 |
| Snug Quarters Ltd | Real estate | 2025 |
| SO Subtle Aesthetics Academy Ltd | Other services | 2024 |
| SO Subtle Aesthetics Ltd | Other services | 2012 |
| Soap National Window Cleaning Limited | Administrative & support | 2017 |
| Softronic Limited | Manufacturing | 2026 |
| Sonic Drywall Ltd | Manufacturing | 2024 |
| Sovereign Events and Activities Limited | Arts & recreation | 2017 |
| Sovereign Gymnastics and Trampolining Ltd | Arts & recreation | 2014 |
| Space Retail Limited | Wholesale & retail | 1998 |
| Spirax Ltd | Information & communication | 2024 |
| Splendid Pets Limited | Wholesale & retail | 2008 |
| Spotted COW Media Limited | Information & communication | 2013 |
| Stapleton AV Production Services International Limited | Information & communication | 2024 |
| Sterling Business Intelligence Limited | Information & communication | 2008 |
| STK Enterprises Limited | Health & social care | 2013 |
| Stockman 360 Ltd | Construction | 2020 |
| Stockman Group Ltd | Real estate | 2020 |
| Superior Properties UK Limited | Real estate | 2000 |
| Supernova Capital LLP | | 2017 |
| Swiftkill Pest Control Ltd | Administrative & support | 2020 |
| Switch Design Services Ltd | Construction | 2023 |
| Systematic Lift Services Ltd | Construction | 2022 |
| Systematic Properties Ltd | Real estate | 2025 |
| T J Pyne Electrical Services Ltd | Construction | 2009 |
| Tafi Properties Ltd | Real estate | 2026 |
| TAG Freeholds Limited | Real estate | 2017 |
| TAG Leaseholds Limited | Real estate | 2017 |
| Talent Works HQ Ltd | Information & communication | 2026 |
| Talkfit Global Limited | Other services | 2018 |
| Tanglewood Capital | Administrative & support | 2018 |