| Razaq Group Investing Ltd | Real estate | 2022 |
| Razors Peterborough Ltd | Other services | 2025 |
| Razvan Courier Services Ltd | Transport & logistics | 2018 |
| Razvil Ltd | Transport & logistics | 2018 |
| RB Curry House Ltd | Hospitality | 2025 |
| Rb&Jb Associates Ltd | Wholesale & retail | 2024 |
| Rbam Construction Limited | Construction | 2018 |
| RBN Cars Ltd | Transport & logistics | 2026 |
| RBP Property Investments Limited | Real estate | 2016 |
| Rbrosmedia Ltd | Professional & scientific | 2024 |
| RBS Property Management Ltd | Households | 2022 |
| RBZ Consultancy Limited | Information & communication | 2011 |
| RC Networks Ltd | Information & communication | 2021 |
| Rccg City of Grace Peterborough | Other services | 2010 |
| RCG Contracting Ltd | Agriculture & fishing | 2020 |
| RCH Orthopaedics Ltd | Health & social care | 2026 |
| RCM Technology Limited | Financial services | 2025 |
| RCP Innovation Limited | Administrative & support | 2017 |
| RCS Accountancy Services Ltd | Information & communication | 2009 |
| RCW Technical Services Limited | Professional & scientific | 2014 |
| RD 2023 Ltd | Real estate | 2023 |
| RD Auto Parts Ltd | Wholesale & retail | 2025 |
| RD ROB Ltd | Transport & logistics | 2020 |
| RDC Networks Limited | Information & communication | 2009 |
| RDC Property Co LLP | | 2025 |
| RDF Export Services Limited | Manufacturing | 2016 |
| RDG Builds Limited | Real estate | 2025 |
| RDM Business Ventures Ltd | Professional & scientific | 2022 |
| RDM Couriers Ltd | Transport & logistics | 2025 |
| RDR Security Services Ltd | Administrative & support | 2024 |
| RDR Trans Ltd | Transport & logistics | 2020 |
| RDV Transport Ltd | Transport & logistics | 2024 |
| Re-New-It Ltd | Construction | 2021 |
| Re-Skin Interior Renovations Ltd | Information & communication | 2017 |
| Reach Boarding Europe Limited | Information & communication | 2016 |
| Reach Fundraising Limited | Manufacturing | 2024 |
| Reach Recruitment Group Limited | Administrative & support | 2020 |
| Reactive Management Ltd | Hospitality | 2022 |
| Ready 2 Recruit Limited | Administrative & support | 2017 |
| READY2LET Ltd | Real estate | 2023 |
| Real Hand Car Wash Ltd | Wholesale & retail | 2022 |
| Real Impacts Engineering Limited | Construction | 2018 |
| Real Market Digital Ltd | Information & communication | 2026 |
| Real Property Assets Limited | Real estate | 2015 |
| Real Valeting Ltd | Wholesale & retail | 2024 |
| Realchem Limited | Wholesale & retail | 2021 |
| Realeminds Ltd | Health & social care | 2020 |
| Realise Bars Ltd | Hospitality | 2025 |
| Realise Finance Ltd | Professional & scientific | 2020 |
| Really Homey Spaces Ltd | Real estate | 2020 |
| Really Social Media Ltd | Professional & scientific | 2015 |
| Reaper Telecommunications Limited | Information & communication | 2001 |
| Reapers Brand Ltd | Hospitality | 2026 |
| Rebecca Faulks Limited | Professional & scientific | 2018 |
| Rebel Investments Limited | Financial services | 2017 |
| Rebel Premium Drinks Limited | Wholesale & retail | 2022 |
| Rebel Trading Company (UK) Limited | Manufacturing | 2009 |
| Reboot Electronics UK Ltd | Wholesale & retail | 2020 |
| Rebounce Solutions Limited | Health & social care | 2012 |
| Rebrandify Ltd | Professional & scientific | 2024 |
| Rebugged CIC | Other services | 2025 |
| Recharge IV LAB Ltd | Extraterritorial | 2025 |
| Recite Investments Limited | Households | 2025 |
| Reclaimed Scaffolding Boards Ltd | Wholesale & retail | 2014 |
| Reco Global Ltd | Administrative & support | 2025 |
| Recoat UK Limited | Manufacturing | 2020 |
| Recomme Ltd | Information & communication | 2022 |
| Reconnectnow Limited | Health & social care | 2022 |
| Recotex Ltd | Construction | 2023 |
| Recoup Limited | Administrative & support | 1995 |
| Recoup Services Limited | Administrative & support | 1997 |
| Recovery Angels Ltd | Wholesale & retail | 2020 |
| Recovery Fleet Ltd | Transport & logistics | 2024 |
| Recreate Holdings Ltd | Financial services | 2024 |
| Recreate Recovery Ltd | Arts & recreation | 2026 |
| Recruit Mint Education Ltd | Administrative & support | 2019 |
| Recruit Mint Ltd | Administrative & support | 2012 |
| RECRUIT2SUCCESS Ltd | Public administration | 2023 |
| Recruiting Hub International Ltd | Information & communication | 2020 |
| Recruiting Hub Ltd | Information & communication | 2020 |
| Recruitment and Administration Solutions Limited | Administrative & support | 2011 |
| Recruitment Buddy Limited | Information & communication | 2026 |
| Recruitment Line Limited | Extraterritorial | 2017 |
| Rectory Farm Kitchen Limited | Hospitality | 2021 |
| Rectory Farm Partners Limited | Agriculture & fishing | 2013 |
| Recycle for Future Ltd | Manufacturing | 2015 |
| Recycling of Used Plastics Limited | Other services | 1989 |
| Red & Blue Constructions Limited | Construction | 2023 |
| Red and Blue Couriers Ltd | Transport & logistics | 2021 |
| Red Barn Consultancy Services Limited | Professional & scientific | 2017 |
| Red Barn Park Residents Management Company Limited | Households | 2006 |
| Red Brick Lettings Ltd | Real estate | 2020 |
| Red Cannon Recruitment Ltd | Administrative & support | 2024 |
| Red Feather Limited | Administrative & support | 2026 |
| Red Global Ventures Limited | Wholesale & retail | 2011 |
| Red Horizon Services Ltd | Information & communication | 2018 |
| Red Kite (Leading Business Solutions) Ltd. | Real estate | 2016 |
| Red Kite Fabrication Limited | Manufacturing | 2023 |
| Red Kite Workplace Technology Limited | Administrative & support | 2023 |
| Red Lion Bicker Investments Limited | Real estate | 2023 |