| Revolve Web Solutions Ltd | Information & communication | 2022 |
| REX Management Company Limited | Real estate | 2007 |
| Rexshi Ltd | Health & social care | 2016 |
| RFB Trustees Five Limited | Professional & scientific | 2004 |
| RFB Trustees Four Limited | Administrative & support | 1996 |
| RFB Trustees One Limited | Administrative & support | 1989 |
| RFB Trustees SIX Limited | Professional & scientific | 2004 |
| RFB Trustees Three Limited | Administrative & support | 1996 |
| RFB Trustees Two Limited | Administrative & support | 1989 |
| RFT Quality Counts Limited | Professional & scientific | 2002 |
| RG Roofguard UK Limited | Construction | 2015 |
| RG1 Properties Ltd | Real estate | 2023 |
| RGW Associates Ltd | Professional & scientific | 2025 |
| RGW Roofing Ltd | Construction | 2025 |
| RH Commercials Grimsby Ltd | Wholesale & retail | 2024 |
| RHF Industrial Ltd | Real estate | 2024 |
| RHG Consultants Limited | Professional & scientific | 2017 |
| RHH Newark Limited | Construction | 2019 |
| RHL Consulting Ltd | Professional & scientific | 2025 |
| RHO Smart Repairs Ltd | Wholesale & retail | 2021 |
| Rhoades Power & Control Limited | Construction | 2011 |
| RHT Digital Designs Limited | Administrative & support | 2019 |
| Riaican Limited | Wholesale & retail | 2026 |
| Riby Grange Farming Company Limited | Agriculture & fishing | 1953 |
| Riby Recycling Ltd | Water & waste | 2025 |
| Rich Lucas Consulting Limited | Professional & scientific | 2025 |
| Richard Property Maintenance Limited | Construction | 2025 |
| Richard Sutton Design Limited | Manufacturing | 2011 |
| Rida Pizza Parlour Ltd | Hospitality | 2016 |
| Ridgetail Limited | Real estate | 2010 |
| Riflo Engineering Limited | Manufacturing | 2019 |
| Riflo Homes Ltd | Real estate | 2025 |
| Rightcare Property Investments Ltd | Real estate | 2015 |
| Rihaala Limited | Administrative & support | 2019 |
| Rike Imporium Ltd | Wholesale & retail | 2024 |
| Rikky Trading Ltd | Wholesale & retail | 2025 |
| Ringway Dental Altrincham Ltd | Health & social care | 2025 |
| Ringway Dental Cheadle | Health & social care | 2013 |
| Ringwood Energy Company Limited | Energy | 2013 |
| Rintts & Co Ltd | Wholesale & retail | 2025 |
| RIO Clothing Limited | Wholesale & retail | 2011 |
| RIO Homes Limited | Real estate | 2025 |
| Riocca Limited | Hospitality | 2015 |
| Ripon Convenience Stores Limited | Wholesale & retail | 2023 |
| Ripped Brew Ltd | Manufacturing | 2026 |
| Rise Today Limited | Information & communication | 2016 |
| Risk and Governance (R & G) Solutions Limited | Professional & scientific | 2019 |
| River Ventures Limited | Financial services | 2025 |
| Riverside Print and Display Limited | Manufacturing | 2013 |
| RJ Commercials Ltd | Wholesale & retail | 2011 |
| RJ Rope & Energy Services Limited | Construction | 2022 |
| RJK Commerce UK Ltd | Wholesale & retail | 2024 |
| RJS Hospitality Solutions Ltd | Hospitality | 2023 |
| RJS HSE Ltd | Mining & quarrying | 2024 |
| RJS Plant Hire Ltd | Construction | 2014 |
| RJT Electrical Engineering Limited | Construction | 2015 |
| Rjtk Investments Ltd | Administrative & support | 2012 |
| RJW Site Services Ltd | Professional & scientific | 2019 |
| RK Universal Ltd | Wholesale & retail | 2025 |
| RKB Systems Limited | Manufacturing | 1998 |
| RLR Aesthetics Limited | Other services | 2022 |
| RM Asbestos Limited | Professional & scientific | 2021 |
| RM Property Developers Limited | Construction | 2022 |
| RMC Renewables Ltd | Information & communication | 2017 |
| RMK Management Services Limited | Professional & scientific | 2011 |
| RMK Property Developments Ltd | Real estate | 2021 |
| RMX Advanced Technologies Ltd | Wholesale & retail | 2019 |
| Rmx-Global Limited | Manufacturing | 2016 |
| RND Grimsby Limited | Real estate | 2024 |
| RNH Technical Ltd | Manufacturing | 2008 |
| Roar Media Creative Ltd | Manufacturing | 2020 |
| Rob-Max Service Ltd | Wholesale & retail | 2023 |
| Robbie Rigger 1 Ltd | Professional & scientific | 2023 |
| Robert J Thompson Limited | Professional & scientific | 2000 |
| Roberts Close (Grimsby) Management Company Limited | Households | 2022 |
| Robinsons Farm Shop (Waltham) Limited | Wholesale & retail | 2012 |
| Robinsons of Lincolnshire Limited | Transport & logistics | 2025 |
| Robyn KAY Limited | Health & social care | 2023 |
| Rock Foundation UK Limited | Health & social care | 2008 |
| Rock Social Enterprise Ltd. | Health & social care | 2009 |
| Rockett Group Ltd | Professional & scientific | 2024 |
| Rockingham Private Health Limited | Public administration | 2022 |
| Rodwell Electrical Ltd | Construction | 2018 |
| Roebuck Site Services Limited | Construction | 2016 |
| Roger Burnett Racing Limited | Professional & scientific | 1985 |
| Roger Ellis Limited | Construction | 2012 |
| Roger Hall (Electrical) Limited | Manufacturing | 1985 |
| Rollfields Limited | Agriculture & fishing | 2005 |
| Rollinson's Foot Health Practice Limited | Health & social care | 2026 |
| Rollits Company Secretaries Limited | Professional & scientific | 1999 |
| Romancing the Ordinary Ltd | Arts & recreation | 2017 |
| Romano Properties Limited | Hospitality | 2025 |
| RON Ramsdens Limited | Wholesale & retail | 1960 |
| Rona Marine Services Ltd | Transport & logistics | 2024 |
| Ronald Fabrication Ltd | Manufacturing | 2016 |
| Roncol Properties Limited | Real estate | 2011 |
| Ronna Ltd | Real estate | 2022 |
| ROO & Co. Estates Ltd | Real estate | 2026 |
| Room 2 Cleethorpes Ltd | Other services | 2017 |
| Room Dividers Limited | Wholesale & retail | 2017 |