| Red Hot Radiators Limited | Extraterritorial | 2005 |
| Red Stone House Limited | Construction | 2015 |
| Red Tail Pest Control Limited | Administrative & support | 2012 |
| Redcliffe College | Education | 1996 |
| Redmire Landscapes Limited | Administrative & support | 1993 |
| Reduced Carbon Solutions Southwest Limited | Construction | 2018 |
| Redwood Wills & Estate Planning Limited | Professional & scientific | 2019 |
| Reece Cameron Ltd | Real estate | 2021 |
| Reed Place Residents Limited | Households | 2019 |
| Reeves Benedict Ltd | Financial services | 2025 |
| Reifal Electrical Limited | Construction | 2026 |
| Reina Rigging Limited | Construction | 2025 |
| Reinna Pubs Ltd | Hospitality | 2023 |
| Rennworks Ltd | Wholesale & retail | 2019 |
| Rennworks Performance Ltd | Wholesale & retail | 2026 |
| RENOUF8 Carpentry and Joinery Limited | Construction | 2026 |
| Rens Future Limited | Construction | 2021 |
| Repton Court (Winchmore Hill) Limited | Households | 1998 |
| Reserva Holdings Limited | Financial services | 2026 |
| Resonate Solutions Ltd | Information & communication | 2018 |
| Restoration Solutions Ltd | Construction | 2025 |
| Revitalise Urban Spa Limited | Other services | 2023 |
| Revival Church Europe | Other services | 2005 |
| REX Communication Services Limited | Professional & scientific | 2018 |
| Reynolds Maintenance Ltd | Construction | 2024 |
| RF Flooring Ltd | Construction | 2020 |
| RF Social Ltd | Professional & scientific | 2018 |
| RGK Heating Ltd | Professional & scientific | 2020 |
| Rhian Davies Freelance Ltd | Professional & scientific | 2024 |
| Ribash Limited | Administrative & support | 2013 |
| Rice & Shine Ltd | Hospitality | 2021 |
| Rich Connexions Ltd | Information & communication | 2025 |
| Rich T Media Limited | Administrative & support | 2012 |
| Richard Carr Limited | Professional & scientific | 2018 |
| Richarya Media Ltd | Information & communication | 2025 |
| Rico Property Finance Ltd | Administrative & support | 2022 |
| Ridgepoint Limited | Construction | 1999 |
| Ridgewell Hawkes Limited | Administrative & support | 2019 |
| Rigging Co. Limited | Arts & recreation | 2011 |
| Rightangle Roofing & Building Ltd | Construction | 2022 |
| Rise UP Construction Ltd | Construction | 2019 |
| Rise UP Estate 2 Ltd | Real estate | 2025 |
| Rise UP Estate Ltd | Real estate | 2023 |
| Rivela Ltd | Professional & scientific | 2023 |
| River Beane Developments Limited | Construction | 2022 |
| River Court (Ware) Management Company Limited | Administrative & support | 1990 |
| River Mill Retreat Limited | Real estate | 2023 |
| Riverside Nursery School - Ware Ltd | Education | 2017 |
| RJA Property Ltd | Real estate | 2014 |
| RJB Multi Trades Ltd | Construction | 2025 |
| RJE Services Limited | Professional & scientific | 2022 |
| RJK Plasterwork Limited | Construction | 2012 |
| Rjlr Properties Limited | Real estate | 2021 |
| RJM Management Ltd | Administrative & support | 2024 |
| RJN Care Solutions Limited | Health & social care | 2025 |
| RKT Consultancy Ltd | Professional & scientific | 2021 |
| RMH Horses Ltd | Arts & recreation | 2023 |
| Rnba Properties Ltd | Real estate | 2026 |
| Roastmaster Solutions Ltd | Manufacturing | 2024 |
| ROB Moretto Limited | Wholesale & retail | 2023 |
| Robert BP Ltd | Other services | 2017 |
| Robin Interiors Limited | Wholesale & retail | 2021 |
| Robs Cleaners Limited | Administrative & support | 2025 |
| Rochjas Limited | Energy | 2016 |
| Rocklands Assets Limited | Real estate | 2026 |
| Roll the Dice Films Ltd | Arts & recreation | 2024 |
| Rollerskate Publishing Limited | Information & communication | 2025 |
| Romehold Limited | Construction | 2002 |
| Romuba Consulting Ltd | Information & communication | 2022 |
| Ronas Limited | Hospitality | 2023 |
| Roofstorooms Limited | Construction | 2025 |
| Roost at Home Ltd | Real estate | 2017 |
| Rosie's Rolls Ltd | Hospitality | 2025 |
| Roundknife Limited | Financial services | 2006 |
| Rowan (Developments) Limited | Construction | 1973 |
| RPW Services Ltd | Construction | 2023 |
| RR Plumbing and Heating Limited | Construction | 2018 |
| RS Grocers Limited | Wholesale & retail | 2024 |
| RS Heating Ltd | Construction | 2008 |
| Rsai Limited | Professional & scientific | 2016 |
| Rsecommerse Ltd | Wholesale & retail | 2025 |
| RTA Mortgage & Financial Services Ltd | Professional & scientific | 2010 |
| RTA Properties Limited | Real estate | 2021 |
| RTH Investments Ltd | Real estate | 2025 |
| RU Corporate Trading Ltd | Administrative & support | 2025 |
| Ruby Electrical Ltd | Construction | 2021 |
| Rudelbury Limited | Construction | 2022 |
| Rudelhoff Construction DMM (UK) Limited | Construction | 2024 |
| Run With Sarah Ltd | Extraterritorial | 2022 |
| Runaround Rascals Limited | Other services | 2014 |
| Russell UP Events Group Limited | Administrative & support | 2025 |
| Ryco Electrical Solutions Ltd | Construction | 2015 |
| Rydan Taverns Limited | Hospitality | 2010 |
| Ryenco Management Limited. | Real estate | 2007 |
| Rytom Limited | Financial services | 2020 |
| S & G Plumbing & Heating Solutions Ltd | Construction | 2018 |
| S and L Construction Group Ltd | Construction | 2022 |
| S Blyth Property Ltd | Real estate | 2020 |
| S Fleming Accountancy Services Limited | Professional & scientific | 2018 |
| S&S Asset Investments Ltd | Financial services | 2023 |