| Richmonds Folkestone LLP | | 2014 |
| Rigel Nexus Ltd | Information & communication | 2025 |
| Rikoju Ltd | Real estate | 2024 |
| Ringbrite Investments Limited | Construction | 1998 |
| Rio's Ice Cream Ltd | Extraterritorial | 2023 |
| Riverlife Ltd | Wholesale & retail | 2026 |
| Riverside Cowgirl Ltd | Hospitality | 2022 |
| Riviera Court (Folkestone) Management Limited | Households | 1982 |
| Riviera Residents Limited | Households | 2001 |
| Rivulet Management Company Ltd | Real estate | 2022 |
| RJ Gilbey Limited | Construction | 2018 |
| RJ Twigg Accountants Ltd | Professional & scientific | 2012 |
| RJB Forensics Limited | Administrative & support | 2004 |
| RJW Signalling Ltd | Transport & logistics | 2018 |
| RL Glazing Ltd | Construction | 2020 |
| RLK Accountancy Ltd | Professional & scientific | 2025 |
| RM Tech Repairs Ltd | Manufacturing | 2021 |
| Rmainwaring Ltd | Construction | 2023 |
| RN Medservices Limited | Health & social care | 2019 |
| Roadrun Productions Limited | Information & communication | 2022 |
| Robert Westbrook Engineering Ltd | Professional & scientific | 2016 |
| Robin Greenwood Studio Ltd | Information & communication | 2025 |
| Robotic Positioning Limited | Construction | 2003 |
| Robsi (Invest) Ltd | Real estate | 2024 |
| Robyn Neild Limited | Information & communication | 2007 |
| Rock Solid Body Transformations Ltd | Health & social care | 2012 |
| Rock Solid Trading Capital Ltd | Financial services | 2020 |
| Rockwise Ltd | Financial services | 2016 |
| Rodgers Admin Services Ltd | Professional & scientific | 2018 |
| Roger & Sons Limited | Construction | 2010 |
| Roka Pizza Ltd | Hospitality | 2019 |
| Rolfes Store Limited | Wholesale & retail | 2014 |
| Roma Capital Group Ltd | Administrative & support | 2013 |
| Roma Capital Investments Limited | Construction | 2025 |
| Romain Loubersanes Ltd | Professional & scientific | 2013 |
| Romi Publishing Ltd | Information & communication | 2025 |
| ROOM-9 Ltd | Manufacturing | 2014 |
| Roost Creations Ltd | Construction | 2023 |
| Roots Garden Solutions Ltd | Administrative & support | 2021 |
| Rosac Limited | Construction | 1986 |
| Rose Architects Ltd | Professional & scientific | 2025 |
| Rose Developments Kent Ltd | Construction | 2026 |
| Rosecroft Care Limited | Health & social care | 1997 |
| Rosemont Restaurant and Cocktail Bar Ltd | Hospitality | 2020 |
| Rosenberg Care Ltd | Health & social care | 2021 |
| Roseveare Consultants Ltd | Professional & scientific | 2022 |
| Ross Yard Ltd | Transport & logistics | 2023 |
| Rossway Storage Solutions Ltd | Administrative & support | 2025 |
| Roundwood Hall Golf Club Ltd | Arts & recreation | 2020 |
| Rowland and Rowland Limited | Arts & recreation | 1938 |
| Roxalex Ltd | Transport & logistics | 2024 |
| Roxwell Consulting Ltd | Information & communication | 2023 |
| Rpaine Rail Ltd | Construction | 2025 |
| RPD Contractors Ltd | Construction | 2023 |
| RPG Europe Limited | Professional & scientific | 2002 |
| Rtmarten Limited | Hospitality | 2004 |
| Rubicon Building Consultancy Limited | Professional & scientific | 2016 |
| Ruff Necks CIC | Education | 2025 |
| Russell Barnes TSS Ltd | Other services | 2025 |
| Russell House Marine Parade Ltd | Households | 2022 |
| RW Builders Ltd | Construction | 2026 |
| RX Venture Ltd | Health & social care | 2024 |
| Ryan Paintsmiths Limited | Construction | 2024 |
| RYE Lettings Ltd | Real estate | 2020 |
| S & G W Limited | Hospitality | 2009 |
| S & J Brickwork Ltd | Construction | 2014 |
| S & K Folkestone Limited | Wholesale & retail | 2009 |
| S & P Brisley Limited | Wholesale & retail | 1999 |
| S & S Motors MOT Ltd | Wholesale & retail | 2024 |
| S & S Vehicles Ltd | Wholesale & retail | 2018 |
| S L RAI Ltd | Wholesale & retail | 2021 |
| S Masters Ltd | Transport & logistics | 2021 |
| S Mclennan Consulting Ltd | Financial services | 2022 |
| S W D Surveying Limited | Professional & scientific | 2011 |
| S&P Electrical Contractors Ltd | Construction | 2023 |
| S&R Accounting Services Limited | Professional & scientific | 2024 |
| S.Mart Private Limited | Wholesale & retail | 2020 |
| S.Pearce Properties Limited | Households | 2019 |
| SA Abel Properties Ltd | Real estate | 2025 |
| SA Dymchurch Ltd | Hospitality | 2025 |
| Saas Academy Limited | Financial services | 2011 |
| Safe Handling Limited | Education | 2004 |
| Saffron Hair Limited | Other services | 2015 |
| Saffron Haircare Ltd | Wholesale & retail | 2024 |
| Sage Security Ltd | Administrative & support | 2024 |
| Sagient Ltd | Administrative & support | 2022 |
| SAI Care Homes Services Limited | Professional & scientific | 2021 |
| SAI Home Care Ltd | Health & social care | 2023 |
| Sailbox Limited | Hospitality | 2023 |
| Sailing Cruises in Comfort Limited | Administrative & support | 1996 |
| Sally Hogarth Ltd | Professional & scientific | 2017 |
| Salma Lebanese Food Limited | Wholesale & retail | 2023 |
| Salon 88 Academy Ltd | Other services | 2014 |
| Salt Yard Work Ltd | Real estate | 2026 |
| SAM Williams Productions Limited | Information & communication | 2017 |
| Samanden Education Limited | Wholesale & retail | 2022 |
| Samcaesar Ltd | Information & communication | 2018 |
| Samnells Home Care Services Limited | Health & social care | 2022 |
| Sandbox Productions Ltd | Information & communication | 2016 |
| Sandgate Advisors Limited | Professional & scientific | 2026 |