| PSG Advisors Ltd | Real estate | 2025 |
| PTS Wiltshire Limited | Administrative & support | 2016 |
| PYE Properties Limited | Real estate | 2005 |
| Pyramex Safety Products Limited | Manufacturing | 2013 |
| Quantum Shift Limited | Information & communication | 2011 |
| Qube Consultancy Services Limited | Professional & scientific | 2025 |
| Queensland House Ltd | Administrative & support | 2008 |
| Queensmead Weybridge Limited | Construction | 2015 |
| Quick Green Energy Ltd | Professional & scientific | 2008 |
| Quinlan Farriery Limited | Agriculture & fishing | 2011 |
| R & H Storage Limited | Administrative & support | 1984 |
| R&R (Restaurants & Rooms) Limited | Hospitality | 2017 |
| R.E.S Connect Ltd | Manufacturing | 2025 |
| Rabehi Cars Limited | Transport & logistics | 2023 |
| Raceware Direct Ltd | Wholesale & retail | 2012 |
| Racing Transmissions Ltd | Manufacturing | 2012 |
| Ragnarcom Limited | Information & communication | 1998 |
| Rain Data Limited | Information & communication | 2016 |
| Rainbows Childcare Ltd | Education | 2008 |
| RAM Global Solutions Limited | Information & communication | 2009 |
| RAM Group Holdings Ltd | Professional & scientific | 2013 |
| RAM Tracking Acquisition Limited | Financial services | 2019 |
| RAM Tracking Group UK Ltd | Professional & scientific | 2011 |
| Rampage Event Management Ltd. | Professional & scientific | 1989 |
| Ramsbury Plant Services Limited | Manufacturing | 2007 |
| Rapid Fire Leisure Limited | Arts & recreation | 2023 |
| RB Wiltshire Limited | Hospitality | 2024 |
| RBR Arden Shoot Limited | Real estate | 2017 |
| RBR Badminton Shoot Limited | Real estate | 2021 |
| RBR Group Limited | Professional & scientific | 2016 |
| RCS Pubs Ltd | Hospitality | 2015 |
| RDP Consultancy Ltd | Professional & scientific | 2010 |
| Real Holidays Travel Agency Limited | Administrative & support | 1989 |
| Realix Technologies UK Limited | Other services | 2024 |
| Realix UK Limited | Other services | 2016 |
| Redbox Mobile Limited | Information & communication | 2013 |
| Reel Time Creative Ltd | Professional & scientific | 2024 |
| Rees Healthcare Limited | Health & social care | 2022 |
| Reese Matthews-Hewer Catering Limited | Hospitality | 2025 |
| Reloaded Bar Limited | Hospitality | 2024 |
| Reloaded Nightclub Limited | Hospitality | 2023 |
| Reloved Revolution Limited | Wholesale & retail | 2020 |
| REM Trading Ltd | Wholesale & retail | 2015 |
| Remote Asset Management Limited | Information & communication | 2004 |
| Rentbury Limited | Real estate | 2021 |
| Rescue & Repatriation Services Ltd | Administrative & support | 2025 |
| Respect Care Ltd | Administrative & support | 2022 |
| Retrogreen Limited | Wholesale & retail | 2021 |
| RH Motive Limited | Wholesale & retail | 2021 |
| RHU Bar Ltd | Hospitality | 1999 |
| Richard Hughes Racing Limited | Arts & recreation | 2004 |
| Ricks Pest Control Berkshire Ltd | Administrative & support | 2014 |
| Ridgeline Expeditions Limited | Administrative & support | 2026 |
| Risehill Limited | Real estate | 2001 |
| Rivar Capital Limited | Financial services | 2017 |
| River Meadow (Stanford in the Vale) Management Company Limited | Households | 2020 |
| River Thames Accountancy Limited | Professional & scientific | 2002 |
| RJS Engineers Limited | Construction | 2025 |
| RL Systems Group Limited | Manufacturing | 2022 |
| RMC Design Consultants Limited | Administrative & support | 2013 |
| Rmpd Consulting Ltd | Professional & scientific | 2017 |
| Robert Gatward Jewellers EOT Limited | Wholesale & retail | 2025 |
| Robert Thomas Ltd | Construction | 2018 |
| Robert Young Associates (Hungerford) Ltd. | Professional & scientific | 2013 |
| Rocklands Advisory Ltd | Professional & scientific | 2021 |
| Rockstone Assets Ltd | Real estate | 2025 |
| Roebuck Communications Limited | Wholesale & retail | 2009 |
| Roelofs & Rubens Ceramics Limited | Manufacturing | 2026 |
| Rofemaron Healthcare Ltd | Health & social care | 2022 |
| Roger King Antiques LLP | | 2017 |
| Roger's Place Ltd | Administrative & support | 2026 |
| Rolaw Limited | Households | 1987 |
| Rookfield Garden Village Limited | Real estate | 1913 |
| Roots and Wings Creativity Limited | Hospitality | 2015 |
| Ross & Ross (Netherhall) Limited | Hospitality | 2025 |
| Ross and Ross Consulting Limited | Real estate | 2018 |
| Roughley Properties Limited | Real estate | 2007 |
| Roxtons Fishing Limited | Administrative & support | 2025 |
| Royle Contractors and Groundworks Ltd | Construction | 2021 |
| Royle Plant Hire Limited | Administrative & support | 2025 |
| RS Catering & Events Ltd | Hospitality | 2015 |
| RSJ Hospitality Limited | Hospitality | 2026 |
| Ruby Moon Content & Communications Ltd | Professional & scientific | 2025 |
| Rutpen Management Services Limited | Professional & scientific | 1970 |
| RV Engineering Ltd | Wholesale & retail | 2019 |
| S & S Rental Limited | Real estate | 2023 |
| S a Jones (Shrewsbury) Limited | Construction | 2013 |
| S N Jones Carpentry Ltd | Construction | 2021 |
| S P O Properties Ltd | Construction | 1987 |
| S&R Network Transition Limited | Information & communication | 2026 |
| S&S Management Services Limited | Professional & scientific | 2015 |
| Sae-Tech Limited | Manufacturing | 1998 |
| Saintt Construction Ltd | Construction | 2018 |
| Salawat Limited | Health & social care | 2025 |
| Salento (2019) Limited | Hospitality | 2019 |
| Salom Europe Limited | Professional & scientific | 2016 |
| SAM Sanchez Limited | Administrative & support | 2009 |
| Samra Property Holdings Limited | Real estate | 2022 |
| Sanchez Electrical Ltd | Construction | 2019 |
| Sara Iddi RN Ltd | Health & social care | 2025 |