| Promentum Service | Information & communication | 2019 |
| Promodata LUX S.A. Ltd | Wholesale & retail | 2024 |
| Property Business Accounts Ltd | Professional & scientific | 2025 |
| Property Business Insights Ltd | Professional & scientific | 2021 |
| Property Strategy Ltd | Professional & scientific | 2016 |
| Propulsion Film & Television Limited | Information & communication | 2019 |
| Prosign Fabrications Ltd | Manufacturing | 2012 |
| Prospects Assured UK Ltd | Real estate | 2013 |
| Proud Pink Inns Limited | Hospitality | 2023 |
| PSM ROV Ltd | Transport & logistics | 2021 |
| PTS Systems Limited | Information & communication | 1985 |
| Public Identity Ltd | Professional & scientific | 2016 |
| Pulton Limited | Construction | 2013 |
| PUNKT24 Ltd | Information & communication | 2018 |
| Pureform Group Limited | Administrative & support | 2024 |
| Purplelf Limited | Professional & scientific | 2018 |
| Pylot Ltd | Information & communication | 2015 |
| Pyper Lake Properties Ltd | Real estate | 2021 |
| Q S C Limited | Real estate | 1984 |
| Q Trend DOM Limited | Real estate | 2016 |
| QAZ83 Ltd | Other services | 2022 |
| QPS Homes Ltd | Real estate | 2018 |
| QPS Homes Maintenance Ltd | Construction | 2012 |
| QPS UK Ltd | Real estate | 2007 |
| Quality Trade Service | Information & communication | 2019 |
| Quandary Collective Ltd | Arts & recreation | 2023 |
| Quattro Body Repairs Limited | Wholesale & retail | 2023 |
| Quattro Car Sales Ltd | Wholesale & retail | 2023 |
| Queens Carlton Management Company Limited | Households | 1970 |
| Quench Gallery C.I.C. | Arts & recreation | 2021 |
| R & J Williams (Kent) Limited | Manufacturing | 1950 |
| R & Z Limited | Wholesale & retail | 2007 |
| R Harvey Limited | Construction | 2011 |
| R J Stott Electrical Ltd | Construction | 2003 |
| R Jones Design & Build Ltd | Construction | 2023 |
| R&C Consultancy Limited | Professional & scientific | 2018 |
| R-Knots Ltd | Health & social care | 2024 |
| R.A. Owners Ltd. | Households | 2002 |
| R.E.French & Sons Ltd | Professional & scientific | 2025 |
| Rachel Boston Services Limited | Administrative & support | 2005 |
| Rachel Briggs Limited | Professional & scientific | 2021 |
| Rachel Piper Ltd | Administrative & support | 2018 |
| Raggamuffin Curation Limited | Arts & recreation | 2024 |
| Rail 2 Rail Limited | Construction | 2017 |
| Railway Hamper Company Limited | Wholesale & retail | 2020 |
| Ralos Group Ltd | Construction | 2026 |
| Ramsgate Counselling Ltd | Health & social care | 2025 |
| Ramsgate Ltd | Households | 2026 |
| Ranelagh Properties Ltd | Real estate | 2017 |
| Ratliff/Landells LLP | | 2011 |
| Rattiganholidayhomes Ltd | Real estate | 2026 |
| Rattiganinvestments Limited | Financial services | 2020 |
| RAW Construction Southeast Ltd. | Construction | 2017 |
| RB Finance Ltd | Administrative & support | 2021 |
| Rbmelectrical Ltd | Construction | 2024 |
| RCA Electrical Ltd | Construction | 2013 |
| RD Landscapes & Construction Limited | Administrative & support | 2026 |
| RD Moylers Ltd | Information & communication | 2024 |
| RDJ Solutions Ltd | Health & social care | 2026 |
| RDN Construction Ltd | Construction | 2020 |
| Real Financial Management Ltd | Professional & scientific | 2025 |
| Realties Ltd | Construction | 2018 |
| Rebel Overlay Limited | Arts & recreation | 2014 |
| Recon Search and Selection Ltd | Professional & scientific | 2014 |
| Recreate Design UK Limited | Information & communication | 2007 |
| Red Turtle Investments Ltd | Real estate | 2022 |
| Redpen (UK) Ltd | Manufacturing | 2011 |
| Reedell Enterprizes Limited | Real estate | 2018 |
| Reedwood Ltd | Construction | 2019 |
| Reflections Framers Limited | Manufacturing | 2022 |
| Regency Properties Block Management Ltd | Real estate | 2022 |
| Regency Properties Lettings Thanet Kent Limited | Real estate | 2017 |
| Regeneration Margate Limited | Real estate | 2024 |
| Regenerous Ltd | Professional & scientific | 2022 |
| Rendezvous Margate Ltd | Hospitality | 2019 |
| REO Jewels Ltd | Wholesale & retail | 2019 |
| REO Renovations Ltd | Construction | 2023 |
| Reshan Brooklyn Ltd | Real estate | 2020 |
| Reshan Ltd | Construction | 2018 |
| Resort Margate CIC | Arts & recreation | 2013 |
| Restless Eight Limited | Wholesale & retail | 2025 |
| Restore Care Ltd | Health & social care | 2025 |
| Resul Retail Limited | Wholesale & retail | 2018 |
| Retained Reflex Ltd | Professional & scientific | 2024 |
| Retro Shack UK Ltd | Wholesale & retail | 2022 |
| Retropassion Limited | Information & communication | 2019 |
| Retrospective Games (UK) Ltd | Information & communication | 2013 |
| Reveley Accounting Services Limited | Professional & scientific | 2012 |
| Reworks Studio Ltd | Administrative & support | 2015 |
| REX Margate Ltd | Wholesale & retail | 2024 |
| Reynolds Locke Limited | Construction | 2015 |
| RG Kent Construction Ltd | Construction | 2024 |
| RHB HV Services Ltd | Energy | 2024 |
| Richborough Hand Car Wash Ltd | Administrative & support | 2016 |
| Ringwood Transport Limited | Transport & logistics | 2022 |
| Rise UP. Clean UP. Margate. CIC | Health & social care | 2020 |
| RJ Offshore Manpower Services Ltd | Professional & scientific | 2023 |
| RJN Renewable Services Ltd | Professional & scientific | 2021 |
| RJS Software Consultants Limited | Information & communication | 2007 |
| RJV Buildings Ltd | Financial services | 2022 |