| Ragip Deliu Limited | Construction | 2021 |
| Rahbar Limited | Wholesale & retail | 2025 |
| Rahman Holdings Limited | Financial services | 2020 |
| Rahman Property Management LLP | | 2025 |
| Rahul UK Limited | Professional & scientific | 2025 |
| Railpro Solutions Ltd | Transport & logistics | 2025 |
| Railway Components and Training Ltd | Construction | 2020 |
| Railway Terrace (Breme Park) Management Company Limited | Households | 2007 |
| Rain Estates Limited | Real estate | 2023 |
| Rain Town Limited | Other services | 2019 |
| Rainbow Maintenance Ltd | Construction | 2019 |
| Rainbow Nails (Addiscombe) Limited | Other services | 2026 |
| Rainbow Tax Ltd | Professional & scientific | 2019 |
| Rainbow-Lily Childcare Ltd | Health & social care | 2021 |
| Rainbows Across Borders CIC | Education | 2024 |
| Rainville Limited | Real estate | 2023 |
| Raison Detre (UK) Limited | Professional & scientific | 2006 |
| Raivyn Ltd | Information & communication | 2025 |
| RAJ & BAV Limited | Other services | 2021 |
| RAJ Beauty Salon Ltd | Other services | 2025 |
| RAJ Itech Consultancy Limited | Information & communication | 2012 |
| Raj's Food & Wine Limited | Wholesale & retail | 2013 |
| Raj.Singh 271 Ltd | Professional & scientific | 2011 |
| Rajaji Food & News Limited | Wholesale & retail | 2014 |
| Rajbans Properties Ltd | Real estate | 2024 |
| Rajkel Limited | Health & social care | 2008 |
| Rajshah Limited | Wholesale & retail | 2020 |
| Raju Enterprises Ltd | Real estate | 2013 |
| Rakumpa Ltd | Health & social care | 2024 |
| Rally Estates Limited | Real estate | 2025 |
| Ralph & SON Cleaning Ltd | Administrative & support | 2016 |
| Ralpha Consulting Ltd | Information & communication | 2020 |
| Raltek Limited | Information & communication | 2014 |
| RAM Cars Limited | Wholesale & retail | 1978 |
| RAM Costing Ltd | Professional & scientific | 2012 |
| RAM Raiders Logistics Ltd | Transport & logistics | 2021 |
| Rama Cakes Ltd | Wholesale & retail | 2026 |
| Ramas Brasserie Limited | Hospitality | 2026 |
| Ramos Motos Ltd | Wholesale & retail | 2017 |
| Ramos Motos Rental Ltd | Administrative & support | 2023 |
| Ramoza Ltd | Wholesale & retail | 2024 |
| Rampra Ltd Ltd | Information & communication | 2025 |
| Ramprak Ltd | Information & communication | 2025 |
| Ramsai IT Consultancy Ltd | Information & communication | 2017 |
| Ramsden Clough Management Company Limited | Households | 2007 |
| Ramsey Mill (Chadderton) Management Limited | Households | 2004 |
| Ramveer Ltd | Wholesale & retail | 2025 |
| Ramvij Charity Fund Limited | Health & social care | 2010 |
| Ramzi'Ssandwich Limited | Hospitality | 2024 |
| Ranapen Ltd | Professional & scientific | 2009 |
| Ranchi Ltd | Professional & scientific | 2025 |
| Rancho Brazil Restaurant Bar & Grill Ltd | Hospitality | 2022 |
| Randal Management Services Limited | Professional & scientific | 2010 |
| Rangciot Ltd | Wholesale & retail | 2025 |
| Range Motor Dealers Ltd | Wholesale & retail | 2019 |
| Rangeplus Ltd | Wholesale & retail | 2013 |
| Ranjini Limited | Hospitality | 2025 |
| Rant DOT Limited | Information & communication | 2018 |
| Ranwo Ltd. | Administrative & support | 2018 |
| Ranya Barber Croydon Ltd | Other services | 2021 |
| RAO Homes Ltd | Construction | 2020 |
| Raobliss Ltd | Wholesale & retail | 2024 |
| Raocon Ltd | Construction | 2018 |
| Rapeed Design Shopfitters Limited | Manufacturing | 1992 |
| Rapeed Forest Hill Limited | Construction | 2017 |
| Rapeed Group Limited | Professional & scientific | 2002 |
| Rapeed Properties Limited | Financial services | 2006 |
| Rapha Christian Centre Ltd | Other services | 2020 |
| Raphadel Ltd | Real estate | 2021 |
| Raphael Court (Romford) RTM Limited | Households | 2006 |
| Raphael Properties Limited | Construction | 1973 |
| Rapp Consulting Services Ltd | Information & communication | 2010 |
| Raprid Limited | Wholesale & retail | 2002 |
| Rara World Limited | Manufacturing | 2025 |
| Rare Abode Ltd | Manufacturing | 2026 |
| Rareroots UK Ltd | Wholesale & retail | 2026 |
| RAS Courier Ltd | Transport & logistics | 2017 |
| Rascal Razas Limited | Real estate | 2017 |
| Rashabeauty Ltd | Other services | 2022 |
| Rashfar Ltd | Information & communication | 2018 |
| Raslj Properties Ltd | Real estate | 2024 |
| Raspberry Clouds Ltd | Information & communication | 2020 |
| Rastafari Ltd | Education | 2019 |
| Rasu Consultancy Ltd | Professional & scientific | 2022 |
| Rathagawd Ltd | Information & communication | 2024 |
| Ratio 1 Management Company Limited | Households | 2013 |
| Ratio 2 Management Company Limited | Households | 2013 |
| Ratio 3 Management Company Limited | Households | 2014 |
| Ratio 4 Management Company Limited | Households | 2014 |
| Ratio 5 Management Company Limited | Households | 2015 |
| Ratio Apps Limited | Information & communication | 2016 |
| Ratnas Properties Ltd | Real estate | 2025 |
| Ravel 123 Limited | Financial services | 2018 |
| Raven Creations Limited | Information & communication | 2005 |
| Raven Waste Paper Company Limited | Water & waste | 1982 |
| Ravenscroft College Ltd | Education | 2026 |
| Ravenslea Road (5) Freehold Limited | Households | 2017 |
| Ravensmede Residents Company Limited | Households | 1999 |
| Ravenstone House Management Limited | Households | 2015 |
| Ravi Investments Limited | Real estate | 1999 |