| Positive Vibes International CIC | Education | 2019 |
| Poultney and Sons Ltd | Hospitality | 2014 |
| Powell&Co Ltd | Wholesale & retail | 2025 |
| Power Distribution and Design Services Limited | Manufacturing | 2024 |
| Premier Cash & Carry Ltd | Wholesale & retail | 2023 |
| Premier Plant Sales Limited | Wholesale & retail | 2002 |
| Press Property Holdings Limited | Financial services | 2024 |
| Prime Shoe Care Limited | Manufacturing | 2018 |
| Primepac Solutions Ltd | Manufacturing | 2005 |
| Primepac Solutions Trustees Limited | Professional & scientific | 2011 |
| Pro Quality and Compliance Ltd | Administrative & support | 2016 |
| Pro Wheels Ebbw Vale Ltd | Wholesale & retail | 2025 |
| Profesto Ltd | Other services | 2019 |
| Proper-T Investment Group Ltd | Construction | 2026 |
| Proper-T Ventures Ltd | Construction | 2026 |
| Protech-Pds Investments Ltd | Arts & recreation | 2025 |
| Protech-Pds Ltd | Construction | 2024 |
| PRW Estates Limited | Real estate | 2025 |
| PS Hair Team Limited | Other services | 2023 |
| Psch Limited | Households | 2015 |
| Pulse Plastics Limited | Manufacturing | 2002 |
| Pulsewave Interactive Ltd | Information & communication | 2026 |
| Pwllglas LLP | | 2008 |
| QCF Construction Limited | Administrative & support | 2007 |
| QCF Contracts Limited | Construction | 2016 |
| Quantum Electrical Fire & Security Limited | Construction | 2026 |
| R.O.L Mechanical Engineering Ltd | Professional & scientific | 2026 |
| Rack International (UK) Limited | Manufacturing | 1999 |
| Radical Materials Ltd | Manufacturing | 2003 |
| RAFAL36 Ltd | Transport & logistics | 2021 |
| Rams Training & Consultancy Ltd | Other services | 2021 |
| Randalls (Groundworks) Limited | Construction | 1995 |
| Randalls (Holdings) Limited | Administrative & support | 1997 |
| Randalls Civils Limited | Construction | 2001 |
| Randalls Properties Limited | Hospitality | 2009 |
| Randalls Resource Ltd | Administrative & support | 2011 |
| Rassau Resource Community Centre C.I.C. | Other services | 2014 |
| Rassau Trading Ltd | Hospitality | 2020 |
| RB Protect Ltd | Administrative & support | 2024 |
| RBS Laser Limited | Wholesale & retail | 2024 |
| React Fire & Security Ltd | Administrative & support | 2019 |
| Red Hot Plumbing Heating and Property Maintenance Limited | Construction | 2026 |
| Red Kite Estate Agents Limited | Real estate | 2023 |
| Reimagined EV Ltd | Administrative & support | 2025 |
| Reina Barber Ltd | Other services | 2022 |
| Renewable Sales Group Ltd | Wholesale & retail | 2025 |
| Renewergy UK Ltd | Professional & scientific | 2019 |
| Reoli Ltd | Information & communication | 2017 |
| RGK Tyres Ltd | Wholesale & retail | 2025 |
| RGW Plant Limited | Manufacturing | 2009 |
| Richards & Lewis Ltd | Professional & scientific | 2006 |
| Rikos Barber Ltd | Other services | 2023 |
| RIO Cctv Services Ltd | Administrative & support | 2022 |
| Rite-Way Building Company Ltd | Construction | 2021 |
| Rite-Way Recycling Ltd | Water & waste | 2022 |
| RJB Electronics Limited | Construction | 2002 |
| RJL Civils Ltd | Construction | 2024 |
| RK Brickwork Limited | Construction | 2016 |
| RLS Construction Services Limited | Construction | 2003 |
| RMO Gardner Properties Ltd | Real estate | 2025 |
| RNA Home Improvements (Wales) Ltd | Construction | 2023 |
| Roseblade Media Limited | Professional & scientific | 2016 |
| Rouge (South) Limited | Health & social care | 2018 |
| Roydavis Retail Limited | Wholesale & retail | 2021 |
| RP Transport Ltd | Administrative & support | 2019 |
| RWT Brickwork Limited | Construction | 2023 |
| S & T John Properties Ltd | Financial services | 2024 |
| S I Mobiles Limited | Other services | 2025 |
| S K Rend Ltd | Construction | 2019 |
| S P U Distribution Limited | Transport & logistics | 2018 |
| S-19SERVICES Ltd | Professional & scientific | 2024 |
| Sacccs Limited | Wholesale & retail | 2009 |
| Samlexa Ltd | Real estate | 2024 |
| Sarah Bowman Property Management Ltd | Extraterritorial | 2025 |
| Scndi Ltd | Professional & scientific | 2020 |
| Scooby DOO Truck Ltd | Hospitality | 2025 |
| Scrubzee Exteriors Limited | Administrative & support | 2026 |
| SE Civils Limited | Construction | 2023 |
| Sears Manufacturing Co. (Europe) Limited | Manufacturing | 1976 |
| Sebring Composites Ltd | Manufacturing | 2019 |
| Sebring Group Ltd | Professional & scientific | 2025 |
| Sebring Marine Ltd | Manufacturing | 2021 |
| Sebring Vehicle Design Ltd | Manufacturing | 2025 |
| Sector One Cards Ltd | Wholesale & retail | 2025 |
| Seren Psychology Services CYF. | Education | 2024 |
| Shahforan Ltd | Hospitality | 2025 |
| Shane's Fish & Chips Ltd | Hospitality | 2022 |
| Shane's Fish Bar Limited | Wholesale & retail | 2017 |
| Shape MSP Limited | Information & communication | 2024 |
| Shar Chand Ltd | Administrative & support | 2019 |
| Sherabling-Uk Ltd. | Extraterritorial | 2016 |
| Shinely Limited | Wholesale & retail | 2026 |
| Sibpad Investments Ltd | Real estate | 2019 |
| Sidoli Parlours Limited | Hospitality | 2000 |
| Sign Productions (Design & Development) Limited | Water & waste | 1987 |
| Silverstar Solutions Ltd | Manufacturing | 2018 |
| Skad Retail Ltd | Wholesale & retail | 2026 |
| SKB Property Ltd | Real estate | 2003 |
| Sky Blue 19 Limited | Hospitality | 2019 |
| SM Green Engineering Limited | Manufacturing | 2024 |