| Royale Car Spa Ltd | Administrative & support | 2019 |
| Royle Trading Company Ltd | Professional & scientific | 2015 |
| Rozlux Ltd | Real estate | 2025 |
| RP Autoshop Ltd | Other services | 2016 |
| RPC Telecommunications Limited | Professional & scientific | 1993 |
| RPD68 Limited | Construction | 2012 |
| Rpkuk Limited | Transport & logistics | 2015 |
| Rplw Holdings Ltd | Wholesale & retail | 2014 |
| RPS Media Ltd | Information & communication | 2020 |
| Rpsg Cargo Ltd | Transport & logistics | 2022 |
| RR Drive Servize Ltd | Transport & logistics | 2024 |
| Rrdti Limited | Hospitality | 2019 |
| RRG Partners Ltd | Other services | 2020 |
| RRI Properties Ltd | Real estate | 2023 |
| RS Advance Limited | Professional & scientific | 2020 |
| RS Equestrian Livery Ltd | Agriculture & fishing | 2026 |
| RS Plastercraft Ltd | Construction | 2025 |
| RS Regen Ltd | Professional & scientific | 2023 |
| RS3 Healthcare Ltd | Wholesale & retail | 2023 |
| RSG Tree Services Ltd | Agriculture & fishing | 2021 |
| RSM Roofing Ltd | Construction | 2007 |
| Rsscan LAB. Ltd. | Professional & scientific | 1999 |
| RSZ Accountancy Limited | Professional & scientific | 2018 |
| RSZ Evolve Limited | Administrative & support | 2024 |
| RSZ Networking Ltd | Administrative & support | 2024 |
| RT Deliveries Ltd | Transport & logistics | 2020 |
| RT Infrastructure Solutions Limited | Manufacturing | 2009 |
| RT Property Group Ltd | Real estate | 2020 |
| Rtjp Property Limited | Real estate | 2025 |
| RTL Solutions Ltd | Information & communication | 2023 |
| RUA Construction Ltd | Construction | 2015 |
| Rubbish Walks CIC | Other services | 2019 |
| Ruben Jade Company Ltd | Professional & scientific | 2025 |
| Rubicon Electrical Engineering Limited | Construction | 2014 |
| Rubix Personnel Limited | Administrative & support | 2015 |
| Ruby Ashley Limited | Manufacturing | 2019 |
| Ruby Henry Holdings Limited | Real estate | 2023 |
| Ruby Homes (East Anglia) Limited | Construction | 2006 |
| Ruby Homes (Felixstowe) Ltd | Real estate | 2006 |
| Ruby Homes (Stowmarket) Limited | Construction | 2020 |
| Ruby Marina Limited | Wholesale & retail | 2025 |
| Ruffles Construction Ltd | Construction | 2024 |
| Rula Care Ltd | Health & social care | 2016 |
| Rula Homecare Limited | Health & social care | 2020 |
| Rula Umar Shamshoom Ltd | Health & social care | 2015 |
| Run Cottage Touring Park Ltd | Hospitality | 2019 |
| Runfold Ssas Development Limited | Construction | 2020 |
| Runner Transporti Ltd | Transport & logistics | 2024 |
| Running World CUP Limited | Manufacturing | 2019 |
| Runway Connect Ltd | Wholesale & retail | 2025 |
| Rupa Publications International Limited | Information & communication | 2015 |
| Rupert Blundell Associates Limited | Information & communication | 2004 |
| Rupert Wace Limited | Administrative & support | 2006 |
| Ruphil Limited | Construction | 2018 |
| Rural Recruitment Limited | Extraterritorial | 2023 |
| Rush Developments Limited | Construction | 2014 |
| Rushbrook Catering Limited | Hospitality | 2017 |
| Rushmere Golf Club Limited | Arts & recreation | 2025 |
| Rushmere Management Services Ltd | Administrative & support | 2023 |
| Rushmere Physiotherapy Ltd | Health & social care | 2017 |
| Rushmere Plumbing & Heating Ltd | Construction | 2019 |
| Rushmere Private Clinic Limited | Health & social care | 2020 |
| Rushmere Property Ltd | Real estate | 2025 |
| Rushmere Property Services Limited | Construction | 2020 |
| Rushmoor (East Anglia) Limited | Transport & logistics | 2010 |
| Rushmore Property Development Ltd | Real estate | 2020 |
| Russell Bell Music Ltd | Information & communication | 2011 |
| Russell Davies Limited | Professional & scientific | 1973 |
| Russell Davies Properties Limited | Professional & scientific | 1923 |
| Russell Holdings (2021) Ltd | Hospitality | 2021 |
| Rusu I Trans Ltd | Transport & logistics | 2020 |
| RVP Hosting LLP | | 2021 |
| RW Accounts Solutions Ltd | Administrative & support | 2020 |
| RW Property Buyers Ltd | Construction | 2025 |
| Rwanda Direct | Other services | 2012 |
| Rwbloyce Limited | Construction | 2024 |
| Rwpc Limited | Hospitality | 2011 |
| Rwpco Limited | Real estate | 2022 |
| RWS Horizon Limited | Real estate | 2017 |
| Ryan Crawford Ltd | Construction | 2024 |
| Ryan Elizabeth (Ipswich) Limited | Real estate | 1993 |
| Ryan Elizabeth Holdings Limited | Real estate | 1971 |
| Ryan Gooding Medium Limited | Administrative & support | 2014 |
| Ryan Kent Media Ltd | Professional & scientific | 2015 |
| Ryan Traffic Ltd | Construction | 2022 |
| Ryan Transport Ltd | Transport & logistics | 2023 |
| Ryan Vicencio Limited | Health & social care | 2023 |
| Rydal Design Services Limited | Professional & scientific | 2018 |
| RYE Holdings Limited | Financial services | 2020 |
| RYK Transport Ltd | Transport & logistics | 2018 |
| Ryke Productions Ltd | Information & communication | 2019 |
| RYO Services Ltd | Transport & logistics | 2017 |
| Rytis Smikas Limited | Hospitality | 2025 |
| S & a Investments (Suffolk) Ltd | Real estate | 2024 |
| S & B Beautiful Ltd | Wholesale & retail | 2023 |
| S & C Traffic Management Services Ltd | Construction | 2016 |
| S & D Invest Ltd | Real estate | 2022 |
| S & E Brickwork Ltd | Construction | 1999 |
| S & G Industrial Roofing Limited | Administrative & support | 2009 |
| S & H Bespoke Carpentry & Cabinet Making Ltd | Manufacturing | 2016 |