| Rsvip Limited | Other services | 2007 |
| Rsvp Specialist Vehicles Limited | Wholesale & retail | 2015 |
| RSW Power Limited | Construction | 2014 |
| RT Components Ltd | Wholesale & retail | 2025 |
| RT Industria Electrical & Mechanical Engineers Ltd | Construction | 2010 |
| RT Motors (Retford) Limited | Wholesale & retail | 2019 |
| RT Network Cabling Solutions Ltd | Construction | 2023 |
| RT Power Services Ltd | Professional & scientific | 2018 |
| RT Property Developments Limited | Real estate | 2020 |
| RT Renewable Energy Services Limited | Construction | 2020 |
| RT Solutions Ltd | Professional & scientific | 2013 |
| RT Technological Services Ltd | Information & communication | 2024 |
| RTB Distributors Limited | Wholesale & retail | 2008 |
| RTC Property Solutions Limited | Real estate | 2023 |
| RTC24HSERVICES Ltd | Construction | 2025 |
| RTE Electrical Ltd | Construction | 2026 |
| RTG Trading Group Ltd | Professional & scientific | 2021 |
| RTK (Nottingham) Limited | Transport & logistics | 2014 |
| RTN Property Investments Limited | Hospitality | 2019 |
| RTT Delivery Ltd | Transport & logistics | 2026 |
| RTW Plus Limited | Health & social care | 2018 |
| RU Challen Ltd | Extraterritorial | 2022 |
| Ruay Heng Ltd | Hospitality | 2025 |
| Ruay Heng UN Limited | Hospitality | 2025 |
| Rubber Compounding Services Limited | Manufacturing | 2020 |
| Rubberbandboyz Ltd | Wholesale & retail | 2021 |
| Ruben Hage Racing and Marketing Ltd | Arts & recreation | 2021 |
| Rubix Education Ltd | Education | 2019 |
| Rubix Kitchens Ltd | Construction | 2023 |
| Rubix Property Management Ltd | Real estate | 2015 |
| Ruby Bhattal Coaching and Consulting Ltd | Professional & scientific | 2025 |
| Ruby Health Ltd | Health & social care | 2021 |
| Ruby KAY Limited | Administrative & support | 2016 |
| Ruby Music Limited | Arts & recreation | 2006 |
| Ruby on Rails Recruitment Limited | Administrative & support | 2022 |
| Ruby RAE Ltd | Wholesale & retail | 2018 |
| Ruby Tree Contracting Limited | Information & communication | 2008 |
| Ruby's Place Ltd | Health & social care | 2026 |
| RUBY247 Care Team Ltd | Administrative & support | 2021 |
| Rubycore Limited | Real estate | 2010 |
| Rubystone Ventures Ltd | Financial services | 2025 |
| Rubysun Ltd | Transport & logistics | 2024 |
| RUD Creams Limited | Hospitality | 2025 |
| Rudd Housing Limited | Hospitality | 2025 |
| Rudd Housing Midlands CIC | Real estate | 2025 |
| Ruddfest Limited | Hospitality | 2006 |
| Ruddi Vape Limited | Manufacturing | 2025 |
| Ruddington Aviation Limited | Real estate | 1995 |
| Ruddington Barber Ltd | Other services | 2026 |
| Ruddington Business Centre Ltd | Administrative & support | 2004 |
| Ruddington Conservative Club Limited | Other services | 1998 |
| Ruddington Food Limited | Hospitality | 2023 |
| Ruddington Gardens (Management Company) Limited | Households | 2018 |
| Ruddington Grange Members’ Golf Club Limited | Arts & recreation | 2021 |
| Ruddington Manor Limited | Real estate | 1994 |
| Ruddington Village Community Partnership CIC | Arts & recreation | 2023 |
| Ruddy Catering Ltd | Hospitality | 2025 |
| Rudin Limited | Health & social care | 2015 |
| Rudo Logistics Ltd | Transport & logistics | 2026 |
| Rudrix Property Ltd | Real estate | 2025 |
| Rudsey Estates Ltd | Real estate | 2022 |
| Rudy Trans Ltd | Wholesale & retail | 2023 |
| Ruffles Dog Club Ltd | Other services | 2016 |
| Rufford Installations Limited | Construction | 2004 |
| Rufford Premier Ltd | Wholesale & retail | 2026 |
| RUG Brothers, Ltd | Information & communication | 2025 |
| Rugby All-Stars Ltd | Education | 2022 |
| Rugby Powder Coating Limited | Manufacturing | 2002 |
| Rugby V.E. Limited | Other services | 1996 |
| Rugger Pups Limited | Education | 2024 |
| Ruhaan Ltd | Hospitality | 2025 |
| Ruhmr Ltd | Real estate | 2025 |
| Ruislip V.E. Limited | Other services | 2007 |
| RUK Pensions Ltd | Financial services | 2010 |
| Rukkins Healthcare Ltd | Health & social care | 2015 |
| Rukmini Management PVT Ltd | Real estate | 2015 |
| Rule #94 Ltd | Professional & scientific | 2019 |
| Ruliskar Ltd | Real estate | 2020 |
| Rumbaclaat Ltd | Manufacturing | 2022 |
| Rumen Petrov Mrcvs Ltd | Professional & scientific | 2025 |
| Rumi Building Services Ltd | Construction | 2024 |
| Rumi Smile Ltd | Health & social care | 2020 |
| Run With K9S Ltd | Education | 2024 |
| Runcan Trans Ltd | Transport & logistics | 2017 |
| Runiva Ltd | Professional & scientific | 2021 |
| Runmily Ltd | Hospitality | 2024 |
| Running Circle Ltd | Information & communication | 2019 |
| Running Circle Records Ltd | Information & communication | 2020 |
| Running Options Ltd | Health & social care | 2023 |
| Running Wild Floral Design Ltd | Wholesale & retail | 2019 |
| Runway Holdings Ltd | Health & social care | 2020 |
| Runway RJR Limited | Real estate | 2019 |
| Rupal Property Group Ltd | Real estate | 2025 |
| Rupen Lettings Limited | Real estate | 2022 |
| Rural Community Action Nottinghamshire | Health & social care | 1987 |
| Rural Escape Limited | Hospitality | 2003 |
| Rural Imaging Ltd | Professional & scientific | 2024 |
| Rurugulmi Ltd | Hospitality | 2024 |
| Rushcliffe Avenue Management Company Limited | Extraterritorial | 1994 |
| Rushcliffe Bathrooms and Plumbing Ltd | Construction | 2021 |