| Robert Owen House Ltd | Households | 2014 |
| Robin Hill Chartered Architect Limited | Professional & scientific | 2015 |
| Robnat Property Ltd | Real estate | 2018 |
| Roby Bars Limited | Hospitality | 2013 |
| Rochdale Road Investco Limited | Real estate | 2022 |
| Rock & Partners Ltd | Professional & scientific | 2024 |
| Rock Estates (Cornwall) Limited | Administrative & support | 1970 |
| Rock Solid Analysis Ltd | Information & communication | 2024 |
| Rocka-T Ltd | Wholesale & retail | 2024 |
| Rocket Education Limited | Professional & scientific | 2021 |
| Rocket Woodfired Pizza Ltd | Hospitality | 2024 |
| Rockform Limited | Wholesale & retail | 2001 |
| Rockhouse Care Limited | Health & social care | 2024 |
| Rockley Photonics Limited | Professional & scientific | 2013 |
| Rocknowe Shutters Edinburgh Limited | Construction | 2018 |
| Roden Commercial Funding Ltd | Administrative & support | 2025 |
| Rodgers IT Services Limited | Professional & scientific | 2019 |
| Rodmill Properties Ltd | Hospitality | 2016 |
| Roebuck Solutions Ltd | Professional & scientific | 2010 |
| Roecliffe Point Limited | Administrative & support | 2021 |
| Roehagen Limited | Information & communication | 2024 |
| Roestown Process Engineers Limited | Professional & scientific | 1997 |
| Rogel Brooks UK Ltd | Real estate | 2020 |
| Rohan Dental Care Ltd | Health & social care | 2021 |
| Rohsha Limited | Real estate | 2025 |
| Rojava Barber Ltd | Other services | 2023 |
| Rolani Group Ltd | Wholesale & retail | 2026 |
| Rollercity Rochdale Ltd | Other services | 2012 |
| Rolling Stock ENG Ltd | Professional & scientific | 2025 |
| Romana Square Residents Company Limited | Households | 2004 |
| Rongxin Power Limited | Construction | 2015 |
| Rooftree Publishing Ltd | Information & communication | 2022 |
| Rookfield Court Limited | Households | 1975 |
| Rooms Brothers Limited | Wholesale & retail | 2004 |
| Rooms Brothers Properties Limited | Real estate | 2014 |
| Rooster Consultancy Limited | Professional & scientific | 2021 |
| Rooted Developments Ltd | Real estate | 1998 |
| Roots Catering Kitchen Ltd | Hospitality | 2024 |
| Ropelink Eco Limited | Professional & scientific | 2017 |
| Roque Holdings Ltd | Financial services | 2019 |
| Rosanna CJ Limited | Professional & scientific | 2023 |
| Roscoe Property Investments Ltd | Real estate | 2022 |
| Rose & Lily Spa Bar Ltd | Other services | 2020 |
| Rose Construction and Property Development Limited | Extraterritorial | 2018 |
| Rose Financeco Limited | Financial services | 2011 |
| Rose Holdco Limited | Professional & scientific | 2009 |
| Rose Lily (TB) Ltd | Health & social care | 2010 |
| Rose Midco Limited | Professional & scientific | 2009 |
| Rose Surveying Services Limited | Professional & scientific | 2022 |
| Rose Travel Group Ltd | Administrative & support | 2024 |
| Roseanne Scott Consultancy Ltd | Professional & scientific | 2023 |
| Rosebery House Limited | Health & social care | 2012 |
| Rosegio Limited | Professional & scientific | 2025 |
| Rosehill Property Management Ltd | Real estate | 2020 |
| Roseleen's 11PLUS Tutoring Ltd | Education | 2025 |
| Roseleo Ltd | Administrative & support | 2023 |
| Rosellas Music Limited | Information & communication | 2024 |
| Roshni 3000 Limited | Professional & scientific | 2024 |
| Rosi Interiors Limited | Wholesale & retail | 1991 |
| Rosie Fastfood Ltd | Hospitality | 2020 |
| Ross Power Projects Limited | Administrative & support | 2015 |
| Rosvean Investments | Financial services | 2022 |
| Rotasure Limited | Administrative & support | 2022 |
| Rotosure Limited | Manufacturing | 2010 |
| Round O Limited | Professional & scientific | 1999 |
| Roundabout MAN Limited | Wholesale & retail | 2019 |
| Roundhound Consulting Limited | Professional & scientific | 2013 |
| Rowanser Limited | Professional & scientific | 2020 |
| Rowcroft Limited | Wholesale & retail | 2004 |
| Rowe Residential Ltd | Real estate | 2014 |
| Rowswood Farm Management Limited | Professional & scientific | 2001 |
| Royal Beacon Hotel Limited | Hospitality | 2014 |
| Royle Psychology Ltd | Education | 2026 |
| Roymed Ltd | Health & social care | 2026 |
| ROZ Barnes Financial Planning Ltd | Professional & scientific | 2020 |
| Rozon Solutions Limited | Information & communication | 2022 |
| RP Asset Management Ltd | Real estate | 2020 |
| RPG Strategic Land Limited | Real estate | 2021 |
| RPG Survey Solutions Limited | Professional & scientific | 2017 |
| Rpmg Global Limited | Construction | 2022 |
| RPT Management Services Limited | Professional & scientific | 1949 |
| RR Consultant Services Limited | Professional & scientific | 2022 |
| Rr&Jb Limited | Wholesale & retail | 2023 |
| RRS Healthcare Ltd | Health & social care | 2016 |
| RS Investments (UK) Limited | Financial services | 2012 |
| Rsbn Projects Limited | Professional & scientific | 2020 |
| Rsmt Limited | Information & communication | 2018 |
| Rstt Limited | Administrative & support | 2023 |
| Rsvconsulting Limited | Professional & scientific | 2017 |
| Rsvp Foods Limited | Wholesale & retail | 2024 |
| RT Hughes Consultancy Ltd | Professional & scientific | 2012 |
| RT Tanner & Co Limited | Administrative & support | 2007 |
| RTA Apps Ltd | Information & communication | 2015 |
| RTB Properties Limited | Real estate | 2020 |
| RTH Netherlands Ltd | Professional & scientific | 2012 |
| RTR N/W Ltd | Financial services | 2015 |
| Rubiks Move Ltd | Transport & logistics | 2025 |
| Ruby Contracts Limited | Professional & scientific | 2019 |
| Ruby Technical Limited | Professional & scientific | 2023 |
| Rudayla Holdings Limited | Real estate | 2015 |