| Olmano Ltd | Transport & logistics | 2019 |
| Omegaqualitas Ltd | Construction | 2024 |
| ON LAB Design Limited | Professional & scientific | 2017 |
| One Summer Transport Ltd | Transport & logistics | 2019 |
| Orange Tree Construction Limited | Construction | 2012 |
| Orient Warrior Ltd | Transport & logistics | 2019 |
| Original Oven Baked Foods Ltd | Hospitality | 2016 |
| Orosz Trans Ltd | Transport & logistics | 2017 |
| Orwell Boats Limited | Transport & logistics | 2014 |
| Osteopilates Clinic Limited | Health & social care | 2016 |
| OZD Trans Ltd | Transport & logistics | 2021 |
| P Green Limited | Real estate | 2003 |
| P. Anderson Construction Limited | Construction | 1997 |
| P.T Construction (Essex) Limited | Construction | 2024 |
| P37 Production Ltd | Information & communication | 2025 |
| Palbion Ltd | Information & communication | 2024 |
| Pandur Ltd | Wholesale & retail | 2026 |
| Panther Marine Ltd | Wholesale & retail | 2021 |
| Paradise Garage Brewing Ltd | Manufacturing | 2022 |
| Paragon Foods & Services Ltd | Wholesale & retail | 2024 |
| Paramount View Ltd | Information & communication | 2021 |
| Paul Farrow Associates Limited | Information & communication | 2015 |
| Paws Express Ltd | Other services | 2022 |
| Pawsitively Wagnificent Ltd | Wholesale & retail | 2025 |
| Paxo Ltd | Transport & logistics | 2025 |
| Pelikan Ltd | Wholesale & retail | 2016 |
| Penfold Properties Limited | Real estate | 2012 |
| Pennaire Filtration Limited | Manufacturing | 2002 |
| Pennex Global Forwarding Limited | Transport & logistics | 2014 |
| Pennex Limited | Transport & logistics | 2000 |
| Perfect Online Management Ltd | Information & communication | 2020 |
| Perfectgroup HQ Ltd | Professional & scientific | 2022 |
| Perola Connections Ltd | Construction | 2023 |
| Personal Electric Technology Ltd | Wholesale & retail | 2022 |
| Peter Chorley Limited | Professional & scientific | 2008 |
| Pilates Reloaded Ltd | Education | 2016 |
| Pints of Beauty Ltd | Information & communication | 2026 |
| Platinum Travel Services Ltd | Transport & logistics | 2025 |
| PMU Treatments Ltd | Other services | 2020 |
| Points Unknown Ltd | Professional & scientific | 2024 |
| Polynomics Ltd | Manufacturing | 2023 |
| Poplar Systems Ltd | Information & communication | 2026 |
| Poulten, Selfe & LEE Limited | Manufacturing | 1953 |
| Practica Medica General Ltd | Health & social care | 2018 |
| Praetor X Ltd | Wholesale & retail | 2025 |
| Praxis Constructs Ltd | Transport & logistics | 2024 |
| Premium Vehicle Valeting Ltd | Administrative & support | 2022 |
| Priors Houseboats Limited | Other services | 2018 |
| Pro-Boat Limited | Wholesale & retail | 1991 |
| Professional Sound Limited | Information & communication | 2023 |
| Project One Interiors Limited | Construction | 2008 |
| PSL Property Limited | Real estate | 1999 |
| Pure Image Photography Limited | Professional & scientific | 2016 |
| Purecare Hygiene Ltd | Health & social care | 2024 |
| QB Motor Services Ltd | Wholesale & retail | 2022 |
| Quantumeta Services Ltd | Information & communication | 2025 |
| Quarterback 71 Limited | Other services | 2018 |
| Quay Venue Limited | Hospitality | 2019 |
| QUE Court (Burnham-On-Crouch) Properties Limited | Households | 2021 |
| Quigi Ltd | Transport & logistics | 2018 |
| R Diss Limited | Administrative & support | 2022 |
| R V Reynolds Electrical Services Ltd | Construction | 2015 |
| Racking UK Limited | Extraterritorial | 1999 |
| RAL Transport Ltd | Transport & logistics | 2026 |
| Rashid's Brothers Ltd | Wholesale & retail | 2026 |
| Rcjc Limited | Manufacturing | 2013 |
| Rckv Ltd | Construction | 2024 |
| Reach Your Goals Ltd | Professional & scientific | 2014 |
| REALTIDE69 Ltd | Real estate | 2023 |
| Reane Ltd | Administrative & support | 2009 |
| Red FOX Mortgages Limited | Financial services | 2019 |
| Redvers Electrical Ltd | Construction | 2025 |
| Regalo DI Thomas Ltd | Other services | 2020 |
| Regan and Davies Cleaning Services Ltd. | Administrative & support | 2018 |
| Regan's Soccer School Limited | Arts & recreation | 2017 |
| Regan's Sportswear Ltd | Wholesale & retail | 2024 |
| Renovation Smiths Ltd | Construction | 2025 |
| RENT2HOME Ltd | Real estate | 2025 |
| RJS Electrical Installations Ltd | Construction | 2021 |
| ROB Skeens IFA Ltd | Financial services | 2016 |
| Robert Underwood Multihulls Limited | Manufacturing | 2002 |
| Roland Professional Hair Ltd | Other services | 2020 |
| Romana Smile Ltd | Health & social care | 2025 |
| Rope Specific Limited | Construction | 2017 |
| Rosestone Properties Limited | Construction | 1972 |
| Royal Corinthian Yacht Club Limited | Arts & recreation | 1930 |
| RP Design Carpentry and Decorating Services Ltd | Construction | 2025 |
| RS Talent Solutions Ltd | Administrative & support | 2023 |
| RS Transport and Logistics Ltd | Transport & logistics | 2024 |
| RSJ Pallets Ltd | Manufacturing | 2026 |
| RSMP4 Ltd | Arts & recreation | 2017 |
| RT Blades Limited | Other services | 2018 |
| RTH Speedway Transport Ltd | Transport & logistics | 2025 |
| Rubber Matters Recycle Ltd | Water & waste | 2019 |
| Rugshire Limited | Real estate | 1988 |
| S.M.F Auto Mechanics Ltd | Wholesale & retail | 2025 |
| Safe Hands Marine Limited | Transport & logistics | 2025 |
| Sage Therapy Ltd | Health & social care | 2022 |
| Samantha Floristry Ltd | Wholesale & retail | 2012 |
| Sam’S Glow UP Ltd | Other services | 2026 |