| RCE Division Limited | Construction | 2026 |
| RCH Engineering and Fabrication Ltd | Manufacturing | 2025 |
| RCP Commercial Consultancy Ltd | Other services | 2017 |
| Rcsc Ltd | Administrative & support | 2015 |
| RD (IOW) Ltd | Manufacturing | 2017 |
| RD Auto Services Limited | Other services | 2017 |
| RD Surveys Limited | Professional & scientific | 2015 |
| RDC Technical Solutions Ltd | Professional & scientific | 2018 |
| Rdhn Holdings Ltd | Financial services | 2024 |
| RDI Property Solutions Limited | Hospitality | 2025 |
| RDR Training Ltd | Administrative & support | 2010 |
| Re-Scan Limited | Administrative & support | 2003 |
| Reach Engineering & Diving Services Limited | Other services | 2000 |
| Reach UP High Limited | Construction | 2019 |
| Real World Projects Limited | Information & communication | 2006 |
| Realty Homes Ltd | Real estate | 2021 |
| Realty Homes Property Management Services Ltd | Households | 2023 |
| Rebecca Lambton Auction Property Ltd | Real estate | 2026 |
| Rebecca's Unisex Hair Services Ltd | Other services | 2026 |
| Rebel Fish Ltd | Manufacturing | 2019 |
| Rebel Fish Trading Ltd | Wholesale & retail | 2025 |
| Rebz Barber Ltd | Other services | 2023 |
| Receptek Limited | Construction | 2005 |
| Recover ME Grimsby Limited | Transport & logistics | 2026 |
| Recruiting Engineers & Managers Limited | Administrative & support | 2000 |
| Red & White Polish Bistro Ltd | Hospitality | 2019 |
| Red Button Social Limited | Information & communication | 2025 |
| Red Door Film & Media Ltd | Other services | 2020 |
| Red HOG Agricultural Services Limited | Other services | 2017 |
| Red HOG Pastures Limited | Agriculture & fishing | 2017 |
| Red Line Design Ltd | Professional & scientific | 2022 |
| Red Lodge Country House Ltd | Hospitality | 2016 |
| Red River Design Ltd | Manufacturing | 2006 |
| Red Shed Properties Ltd | Real estate | 2015 |
| Red Sun Chinese Takeaway Ltd | Hospitality | 2021 |
| RED&WHITE48 Ltd | Transport & logistics | 2019 |
| Redcliffe Management Services Limited | Professional & scientific | 2007 |
| Reddiex Homes Limited | Real estate | 2023 |
| Reddiex View Limited | Health & social care | 2022 |
| Redemption Vape Limited | Manufacturing | 2017 |
| Redesyn Media Productions Ltd | Professional & scientific | 2025 |
| Redfern Cleaning Services Limited | Other services | 2007 |
| Redfern Garage Services Limited | Wholesale & retail | 2009 |
| Redgate Electrical Services Limited | Construction | 2021 |
| Redgate Estates Limited | Construction | 2026 |
| Redrose Property Solutions Limited | Construction | 2013 |
| REDSE7EN Electrical Contractors Limited | Construction | 2015 |
| Redwood Commercials (UK) Limited | Wholesale & retail | 2002 |
| Reeds (Lincs) Ltd | Health & social care | 2017 |
| Reef Rash Limited | Wholesale & retail | 2002 |
| Refill Revolution Limited | Wholesale & retail | 2019 |
| Refined Aesthetics by Ella Ltd | Health & social care | 2026 |
| Refined Apparel Limited | Manufacturing | 2016 |
| Reflections Window & Exterior Cleaning Limited | Administrative & support | 2026 |
| Refractory Inspection Services Ltd | Professional & scientific | 2008 |
| Refresh Kitchens & Bedrooms Ltd | Manufacturing | 2021 |
| Refrigerated Containers International Limited | Wholesale & retail | 2025 |
| Refrigeration & Air-Conditioning Solutions Limited | Construction | 2012 |
| Refrigeration and Site Services Limited | Manufacturing | 1995 |
| Refurbishing Solutions Ltd | Wholesale & retail | 2016 |
| Regal Activity Centre CIC | Arts & recreation | 2019 |
| Regent Gardens (Grimsby) Building Five RTM Company Limited | Households | 2019 |
| Regent Gardens (Grimsby) Building Four RTM Company Limited | Households | 2019 |
| Regent Gardens (Grimsby) Building One RTM Company Limited | Households | 2019 |
| Regent Gardens (Grimsby) Building Seven RTM Company Limited | Households | 2019 |
| Regent Gardens (Grimsby) Building SIX RTM Company Limited | Households | 2019 |
| Regent Gardens (Grimsby) Building Three RTM Company Limited | Households | 2019 |
| Regent Gardens (Grimsby) Building Two RTM Company Limited | Households | 2019 |
| Regent Gardens (Grimsby) Residents Association Limited | Households | 2018 |
| Rehoboth Holdings Ltd | Real estate | 2021 |
| Reid Safety Solutions Limited | Construction | 2019 |
| Reilyn Limited | Administrative & support | 2015 |
| Rejieli Ltd | Health & social care | 2018 |
| Rejuvenate Hair Clinics Ltd | Health & social care | 2015 |
| Remedial Solutions UK Limited | Other services | 2019 |
| Renaissance Hair Design (Scarborough) Limited | Other services | 2015 |
| Rene and RAY Investments Group Ltd | Real estate | 2016 |
| Renewable Power Academy Ltd | Education | 2023 |
| Renewable Power Group Ltd | Financial services | 2023 |
| Renewable Power Services Ltd | Manufacturing | 2023 |
| Renewables Connect International Ltd | Information & communication | 2024 |
| Renewables Yorkshire Ltd | Energy | 2026 |
| Rengor Properties Ltd | Real estate | 2025 |
| Rent and Return Limited | Administrative & support | 2019 |
| Rentals and Renovations Limited | Construction | 2017 |
| Rentobuy Ltd | Administrative & support | 2015 |
| Renula Properties Ltd | Real estate | 2026 |
| Replace My Smartscreen Limited | Other services | 2016 |
| RES R-Chiz Electrical Services Ltd | Construction | 2024 |
| Resolve Recruitment Solutions Ltd | Administrative & support | 2012 |
| Resource Seafood Ltd | Professional & scientific | 2022 |
| Retford Boiler Services Limited | Construction | 2019 |
| Retrospec Limited | Information & communication | 2004 |
| Retsco Limited | Real estate | 2003 |
| REV 'N' Ride Motorcycle Training School Ltd. | Education | 2016 |
| Reveal Media Productions Ltd | Arts & recreation | 2020 |
| Revila Digital Limited | Professional & scientific | 2024 |
| Revo Fabrications Limited | Manufacturing | 2021 |
| Revolution Engineering Group Limited | Professional & scientific | 2024 |
| Revolution Engineering Services Ltd | Administrative & support | 2019 |