| Quality & Engineering Resources Limited | Other services | 2002 |
| Quality Brickwork Contractors Ltd. | Construction | 2000 |
| Quality Building Control Limited | Professional & scientific | 2009 |
| Quality Care Holdings Ltd | Health & social care | 2022 |
| Quality Homes Investments Limited | Construction | 1999 |
| Quality Orthodontics Limited | Health & social care | 2011 |
| Quality Team Heating Ltd | Construction | 2021 |
| Quality Through Partnership Limited | Professional & scientific | 2006 |
| Quallego Ltd | Wholesale & retail | 2023 |
| Qualtec Software Limited | Information & communication | 1997 |
| Qualtec Systems Limited | Information & communication | 1989 |
| Quam Management Ltd | Real estate | 2022 |
| Quantame Solutions Ltd | Information & communication | 2026 |
| Quantelio Group Limited | Wholesale & retail | 2026 |
| Quantum Global Search Limited | Administrative & support | 2024 |
| Quantus Services Limited | Professional & scientific | 1986 |
| Quay Lets Limited | Real estate | 2018 |
| Qubion Group Limited | Information & communication | 2026 |
| QUE Media Ltd | Professional & scientific | 2020 |
| Queenscope Enterprises Limited | Wholesale & retail | 1998 |
| Quest Children's Home Limited | Health & social care | 2022 |
| Quick Find Directories Limited | Information & communication | 2008 |
| Quick Service Logistics UK LP | | 2017 |
| Quickplans Ltd | Wholesale & retail | 2018 |
| Quigs Bar Ltd | Hospitality | 2019 |
| Quikuse Limited | Other services | 2024 |
| Quilibrium Limited | Wholesale & retail | 2011 |
| Quinnie Properties Ltd | Real estate | 2022 |
| Quintet Design Services Ltd | Information & communication | 1998 |
| Quite Laterally Ltd | Professional & scientific | 2019 |
| Quote My Business Energy (Birmingham) Ltd | Other services | 2018 |
| Quotient Ltd | Professional & scientific | 2024 |
| Quvo Software Limited | Information & communication | 2024 |
| Qwikview Enterprise Discovery Limited | Information & communication | 2011 |
| R & a Burns Limited | Professional & scientific | 2007 |
| R & I Developments Ltd. | Construction | 2019 |
| R & M Beavon Ltd | Professional & scientific | 2024 |
| R & R Advisors Ltd | Other services | 2014 |
| R & R Charles Properties Limited | Hospitality | 2015 |
| R a Farming Ltd | Agriculture & fishing | 2024 |
| R and R Health Management Limited | Real estate | 2015 |
| R Bird Property Limited | Real estate | 2022 |
| R C Safety Limited | Professional & scientific | 2025 |
| R FOX Holdings Limited | Financial services | 2021 |
| R H Mechanical Services Ltd | Construction | 2020 |
| R J Dorney Electrical Services Limited | Construction | 2008 |
| R K Electrical (West Midlands) Limited | Manufacturing | 2018 |
| R M Callaghan & Associates Limited | Health & social care | 2010 |
| R M I Property Ltd | Real estate | 2024 |
| R M S Investments (B'Ham) Limited | Real estate | 2004 |
| R Matharu Ltd | Other services | 2021 |
| R Mullen Construction Ltd | Construction | 2016 |
| R N Consultants Ltd | Construction | 2005 |
| R O Gorman Limited | Construction | 2015 |
| R P Rendle & Co Limited | Professional & scientific | 2006 |
| R Singh Photography Limited | Professional & scientific | 2021 |
| R Trevis Plumbing and Heating Ltd | Construction | 2024 |
| R W Hughes & Co (Roofing) Limited | Construction | 2000 |
| R Y T S Limited | Agriculture & fishing | 1993 |
| R&A Shows Limited | Arts & recreation | 2022 |
| R&B Landscape & Fencing Ltd | Administrative & support | 2024 |
| R&F Homes Limited | Real estate | 2020 |
| R&Gh Properties Ltd | Real estate | 2023 |
| R&J Branson Cross Properties Limited | Real estate | 2025 |
| R&K Wicklow Homes Ltd | Real estate | 2018 |
| R&L Project Consultants Ltd | Construction | 2026 |
| R&R Contracts-Renovation & Refurbishment Specialists Limited | Construction | 2020 |
| R&R Engineering Co Inc Ltd | Manufacturing | 2023 |
| R&R Luxe Properties Ltd | Real estate | 2024 |
| R&W Electrical Services Limited | Construction | 2020 |
| R. Adams & Sons Holdings Ltd | Financial services | 2021 |
| R. J. Steele Painting & Decorating Ltd | Construction | 2020 |
| R. J. Transport (Shustoke) Limited | Transport & logistics | 2007 |
| R. Riley Property Services Limited | Construction | 2011 |
| R.C.L. Ceramics Limited | Manufacturing | 2004 |
| R.G. Darby Consultancy Limited | Information & communication | 2008 |
| R.M. Matthews Limited | Real estate | 2004 |
| R.Petts Property Maintenance Limited | Construction | 2015 |
| R.T.A. Services Limited | Wholesale & retail | 2006 |
| R.W. Smale (Northern) Ltd | Wholesale & retail | 1987 |
| R09 Consulting Ltd | Professional & scientific | 2022 |
| R2 Design Limited | Information & communication | 2007 |
| R2D2 Investments Ltd | Financial services | 2021 |
| R3WARD Limited | Extraterritorial | 2023 |
| RAA Property Investments Limited | Real estate | 2024 |
| Raafos Analytics Limited | Information & communication | 2017 |
| Raang Investments Ltd | Real estate | 2025 |
| Rabada Property Management Ltd | Real estate | 2024 |
| Rabin Events Limited | Administrative & support | 2016 |
| Rabox Ltd | Information & communication | 2022 |
| RAC Plumbing, Heating & Bathrooms Ltd | Construction | 2023 |
| Racalt Tech Limited | Professional & scientific | 2001 |
| Rack Storage (UK) Limited | Construction | 2012 |
| Racking Safety Services Limited | Wholesale & retail | 2020 |
| Radha Jyothi Limited | Hospitality | 2024 |
| Radha Medics Limited | Health & social care | 2019 |
| Radiance Plastering Ltd | Construction | 2007 |
| Radiometer Holdco Limited | Professional & scientific | 2014 |
| Radium Digital Limited | Information & communication | 2015 |
| Radlux Housing Ltd | Real estate | 2026 |