| Romeos Swanage Ltd | Hospitality | 2025 |
| Romic Group Limited | Wholesale & retail | 2014 |
| Romic International Ltd | Extraterritorial | 2024 |
| Romrem Ltd | Wholesale & retail | 2026 |
| Roof Professionals Ltd | Construction | 2025 |
| Rookery Farmers Limited | Agriculture & fishing | 2015 |
| Rookwood Investments Limited | Real estate | 2003 |
| Ropa Trans Ltd | Transport & logistics | 2020 |
| Rose & Silver Limited | Manufacturing | 2009 |
| Rose and Dagger Ltd | Other services | 2021 |
| Rose Carpentry & Joinery Services Ltd | Manufacturing | 2024 |
| Ross Gunn Motorsport Ltd | Arts & recreation | 2012 |
| Rosu Engineering Limited | Manufacturing | 2015 |
| Rotariu Transport Ltd | Transport & logistics | 2025 |
| Rothwell Road Property Management Company Limited | Households | 2005 |
| Rotsun Contract Ltd | Professional & scientific | 2018 |
| Roufar Limited | Health & social care | 2022 |
| Roundhead Services Limited | Real estate | 1991 |
| Route Financial Ltd | Financial services | 2019 |
| Roxbis Ltd | Wholesale & retail | 2025 |
| Royals Plumbing and Heating Ltd | Construction | 2026 |
| RP31 Limited | Real estate | 2022 |
| RPS Corner Shop Ltd | Wholesale & retail | 2017 |
| RR Purity Detailing Ltd | Wholesale & retail | 2021 |
| RRL Design Ltd. | Information & communication | 2015 |
| RRP (UK) Limited | Manufacturing | 2001 |
| RRR Living Ltd | Hospitality | 2022 |
| RRS Trans Ltd | Administrative & support | 2018 |
| RS Autoparts Ltd | Wholesale & retail | 2025 |
| RS Global Logistic Ltd | Transport & logistics | 2018 |
| RSC Resources Ltd. | Administrative & support | 2015 |
| Rsjd Developments Ltd | Real estate | 2018 |
| RTC Property Services Ltd | Real estate | 2021 |
| Rubix Paving Services Limited | Construction | 2025 |
| Ruby Do's Dog Grooming and Boutique Ltd | Other services | 2024 |
| RUE Nails Ltd | Other services | 2025 |
| Rukiaeliyas Investments Ltd | Real estate | 2020 |
| Rukkydidit Production Limited | Information & communication | 2023 |
| Rumbi Properties Ltd | Real estate | 2019 |
| Runhams Painting & Decorating Ltd | Construction | 2022 |
| Rupert and Bucks Doggy Cuts Ltd | Other services | 2022 |
| Rupert Hydraulics Ltd | Manufacturing | 2015 |
| Rushden Golf Club Limited | Arts & recreation | 2012 |
| Rushden Masala Ltd | Hospitality | 2020 |
| Rushden Masonic Hall Company Limited | Hospitality | 1954 |
| Rushden Transport Services Limited | Wholesale & retail | 2023 |
| Rushden Valeting Ltd | Other services | 2024 |
| Rushton Developments Limited | Construction | 2018 |
| Russello's Limited | Hospitality | 2020 |
| Rustic Willows Group Limited | Professional & scientific | 2025 |
| Ruth Turner Interior Design Limited | Construction | 2013 |
| Rutherford Design Services Limited | Professional & scientific | 2023 |
| Rutherfords Locksmiths Limited | Wholesale & retail | 2002 |
| Ruthvik IT Limited | Wholesale & retail | 2025 |
| Ruvan Exquisite Ltd | Manufacturing | 2026 |
| RV One Stop Accounting Solutions Limited | Professional & scientific | 2024 |
| RV There YET Recreational Vehicle Servicing Ltd | Wholesale & retail | 2025 |
| Ryaad Holdings Ltd | Real estate | 2024 |
| Ryana Expres Ltd | Transport & logistics | 2025 |
| Ryas Logistics Limited | Transport & logistics | 2018 |
| Ryeburn Management Limited | Administrative & support | 2020 |
| Rymece Limited | Real estate | 2006 |
| Rytebyte Tech Limited | Wholesale & retail | 2025 |
| S & D Property Holdings (Northants) Limited | Real estate | 2020 |
| S & J Kenny Carpets Ltd | Wholesale & retail | 2010 |
| S and C Groundworks Limited | Construction | 2023 |
| S and K Food Services Ltd | Hospitality | 2021 |
| S B Facades Limited | Construction | 2016 |
| S C Holding Ventures Limited | Financial services | 2024 |
| S C Riconda Limited | Professional & scientific | 2023 |
| S C Transport Ltd | Transport & logistics | 2025 |
| S Corn Ltd | Wholesale & retail | 2023 |
| S D Transport 4 U Ltd | Transport & logistics | 2018 |
| S Daly Property Limited | Real estate | 2023 |
| S Dunkley Truck & BUS Ltd | Wholesale & retail | 2011 |
| S F Construction Limited | Construction | 2013 |
| S I Moisa Ltd | Construction | 2020 |
| S J Group Electric Ltd | Construction | 2025 |
| S K Auto Repair Ltd | Wholesale & retail | 2016 |
| S Ncho Consultancy Ltd | Health & social care | 2012 |
| S P Coaching & Hypnotherapy Ltd | Health & social care | 2025 |
| S&A Training Services Ltd | Professional & scientific | 2018 |
| S&J Retail Ltd | Wholesale & retail | 2020 |
| S&K Air Conditioning Limited | Construction | 2023 |
| S&K Little Sorters Ltd | Transport & logistics | 2022 |
| S&S Braich Ltd | Other services | 2021 |
| S&T’S Construction Limited | Construction | 2023 |
| S&V Telecom Ltd | Information & communication | 2026 |
| S,R,J Vicarage Limited | Agriculture & fishing | 2016 |
| S-Grace Professional Services Ltd | Health & social care | 2013 |
| S.E.N in Tech CIC | Information & communication | 2025 |
| S.J.Heighton & Co.,Limited | Real estate | 1933 |
| S.M.C Scaffolding Ltd | Construction | 2026 |
| S.T. Machinery Sales Limited | Manufacturing | 1999 |
| S.T.A. Groundwork Services Ltd | Construction | 2006 |
| S1MPLE Sales Ltd | Wholesale & retail | 2021 |
| S2 Group Parts Ltd | Wholesale & retail | 2017 |
| SA Premier Investments Ltd | Real estate | 2024 |
| SA Trans Ltd | Transport & logistics | 2026 |
| Saas Direct Limited | Information & communication | 2025 |