| Primelodge Developments Limited | Construction | 1999 |
| Primelodge Estates Limited | Real estate | 1999 |
| Pro Nano UK Limited | Extraterritorial | 2021 |
| Profoot (UK) Ltd | Wholesale & retail | 2001 |
| Proline Transports Ltd | Transport & logistics | 2018 |
| Promptai Ltd | Information & communication | 2024 |
| Purest House of Lair Ltd. | Agriculture & fishing | 2025 |
| Purpose Care Services Limited | Health & social care | 2012 |
| Quanta Digital Studio Ltd | Information & communication | 2026 |
| Quebit Consulting (UK) Limited | Information & communication | 2013 |
| Qwick Stop PVT Ltd | Wholesale & retail | 2024 |
| R & K Gogna LLP | | 2024 |
| Raha Cafe Limited | Hospitality | 2026 |
| Raha Cafe Lounge Limited | Hospitality | 2026 |
| Raha LDN Ltd | Wholesale & retail | 2026 |
| Raha London Limited | Wholesale & retail | 2026 |
| Raha Lounge Limited | Hospitality | 2026 |
| Ralph Travel Ltd | Administrative & support | 2016 |
| Rapier Security Services Limited | Administrative & support | 2007 |
| RBP Sports Limited | Education | 2025 |
| RBT Car Parts Ltd | Wholesale & retail | 2021 |
| RBT Construction Ltd | Construction | 2021 |
| RBT Management Ltd | Wholesale & retail | 2021 |
| RBT Property Management Ltd | Real estate | 2021 |
| Rebecca Louise Law Limited | Arts & recreation | 2012 |
| Reelstore Ltd | Wholesale & retail | 2020 |
| Rehoboam Limited | Professional & scientific | 2025 |
| REX Car Club Limited | Administrative & support | 2015 |
| Reztickets Limited | Administrative & support | 2026 |
| Rgra Commerce Group Ltd | Wholesale & retail | 2020 |
| Rhiians Rail Ltd | Wholesale & retail | 2025 |
| RI Scaffolding Ltd | Construction | 2019 |
| Rich Made Ltd | Information & communication | 2019 |
| Richmond Caterers Limited | Hospitality | 1968 |
| RIO Construct Ltd | Construction | 2016 |
| RNB Management LLP | | 2009 |
| Rockline Security Consulting Ltd | Professional & scientific | 2021 |
| Rockline Security Ltd | Professional & scientific | 2001 |
| Roderick Charles Holdings Limited | Financial services | 2018 |
| Roderick Charles Limited | Wholesale & retail | 1996 |
| Roettgers & Dolkar Limited | Extraterritorial | 2007 |
| Room C Merchandise Ltd | Wholesale & retail | 2019 |
| Room to Store Self Storage Limited | Real estate | 2026 |
| Rose Development Services Limited | Construction | 2018 |
| Rosebank Mortgage Brokers Ltd | Financial services | 2018 |
| Roseleigh Investments Limited | Real estate | 1964 |
| Round Two Retro Ltd | Wholesale & retail | 2025 |
| RSB Trans Ltd | Transport & logistics | 2023 |
| RSM Consultancy Services Limited | Administrative & support | 2023 |
| Rtech Community Solutions Ltd | Construction | 2019 |
| Ruffell-Hilton Limited | | 1974 |
| Ruler Consult Ltd | Professional & scientific | 2015 |
| Russell Family Investments Limited | Financial services | 2024 |
| S Allan Property Ltd | Real estate | 2026 |
| S H Bakery Supplies Limited | Wholesale & retail | 2023 |
| S&B Food Ltd | Hospitality | 2020 |
| S&J Quartu Ltd | Hospitality | 2018 |
| S-K Law Solicitors Limited | Professional & scientific | 2017 |
| SA Car Care Ltd | Wholesale & retail | 2024 |
| Sacl Limited | Real estate | 2024 |
| Sagaponack Properties Ltd | Real estate | 2022 |
| Sakura Sutajio Ltd | Wholesale & retail | 2024 |
| SAM Kurdish Barber Ltd | Other services | 2023 |
| SAM Tyres Limited | Wholesale & retail | 2020 |
| SAM Tyres Service & Tracking Ltd | Wholesale & retail | 2025 |
| Samak Ethical Finance Ltd | Financial services | 2015 |
| Samfia Investments Limited | Real estate | 2003 |
| Sapina Holdings Limited | Real estate | 2018 |
| SAR NOU Ltd | Wholesale & retail | 2024 |
| Sasta Limited | Financial services | 2023 |
| Scgk Investment Ltd | Hospitality | 2026 |
| Sedra Capital Limited | Other services | 2017 |
| Sedra Properties LLP | | 2023 |
| Seedraised Consultants LLP | | 2024 |
| Sehha Limited | Information & communication | 2019 |
| Self Catering Hotels Ltd | Hospitality | 2024 |
| Shagun Weddings Limited | Hospitality | 2015 |
| Shane Edits Limited | Information & communication | 2012 |
| Shanzi Enterprises Ltd | Wholesale & retail | 2020 |
| Shift Loads Logistics Ltd | Other services | 2024 |
| Shinning Star Limited | Professional & scientific | 2014 |
| Shortlands Estates Limited | Real estate | 2011 |
| Shuffle Wear Limited | Wholesale & retail | 2019 |
| Shumy's Beauty & Spa Ltd | Other services | 2023 |
| SI Hill Design Limited | Professional & scientific | 2016 |
| Sibco Transport Ltd | Transport & logistics | 2024 |
| Siip Life Ltd | Wholesale & retail | 2022 |
| Silver Leaf Property Management Ltd | Real estate | 2025 |
| Silverwood Properties Limited | Real estate | 1990 |
| Simple.Life Apps UK Ltd | Information & communication | 2021 |
| Simply Room LET Ltd | Construction | 2010 |
| Sity Consultancy Ltd | Professional & scientific | 2020 |
| Skmg Limited | Financial services | 2019 |
| Skordis Investments Limited | Construction | 1984 |
| Slack by Name Ltd | Information & communication | 2018 |
| Sleepstore Limited | Information & communication | 2018 |
| Sloppy Coffee Limited | Hospitality | 2023 |
| SM Thompson Wealth Limited | Financial services | 2017 |
| Smart Phones Shop Ltd | Wholesale & retail | 2022 |
| Smartshopbee Ltd | Wholesale & retail | 2026 |