| Royd House Residents Management Company (Cleckheaton) Limited | Households | 1974 |
| RP and Associates Properties Limited | Professional & scientific | 2024 |
| RP Investments (Yorkshire) Limited | Professional & scientific | 2016 |
| RP Properties North Ltd | Real estate | 2025 |
| RPW Tree Services Limited | Administrative & support | 2025 |
| RR Brothers Ltd | Health & social care | 2019 |
| RSA Property Group Limited | Real estate | 2025 |
| RSG77PROPERTIES Limited | Real estate | 2024 |
| RSM Parcel Services Limited | Transport & logistics | 2014 |
| RT Renewables Limited | Construction | 2023 |
| RTK Couriers Limited | Transport & logistics | 2025 |
| RTK Logistics Ltd | Transport & logistics | 2022 |
| Rubiks Digital Limited | Information & communication | 2022 |
| Rufus Purnell Consultancy Ltd | Financial services | 2011 |
| Rustic Reclaim Limited | Manufacturing | 2025 |
| RW Corporation Ltd | Wholesale & retail | 2021 |
| RWG Construction Ltd | Construction | 2015 |
| Ryan Dylan Properties Ltd | Real estate | 2024 |
| Ryan Harris Joinery Limited | Manufacturing | 2026 |
| S & B Heating Limited | Construction | 2014 |
| S & K Estate Agents Ltd | Real estate | 2024 |
| S & L Properties (Yorkshire) Ltd | Real estate | 2005 |
| S & M Trading Ltd | Wholesale & retail | 2019 |
| S & W Plumbing & Heating Limited | Construction | 2003 |
| S Hughes Properties Limited | Real estate | 2024 |
| S J Global Solar Ltd | Construction | 2013 |
| S. Bowler Limited | Professional & scientific | 2018 |
| S.A.R. Developers Limited | Construction | 2014 |
| S.C. Builders Limited | Administrative & support | 2002 |
| S16 Projects Limited | Construction | 2025 |
| Sadek Holdings Ltd | Real estate | 2021 |
| Sadek Smart Ltd | Health & social care | 2020 |
| Sadek Smile Ltd | Health & social care | 2018 |
| Sael Contractors Limited | Manufacturing | 2025 |
| Safe Harbour Group Limited | Arts & recreation | 2023 |
| SAJ & Sons Ltd | Other services | 2015 |
| Salt and Stone Massage Therapy Ltd | Other services | 2021 |
| SAM Anderson Limited | Extraterritorial | 2005 |
| SAM Business Analyst Limited | Information & communication | 2016 |
| SAM Fortis Training Academy Ltd | Education | 2025 |
| SAM Supplies Ltd | Wholesale & retail | 2025 |
| SAM Teale Productions Limited | Information & communication | 2020 |
| Same Legacy Properties Ltd | Real estate | 2025 |
| Samlaw Limited | Professional & scientific | 2019 |
| Samuel Peter Wilson Properties Limited | Households | 2024 |
| Sand Building Services Limited | Professional & scientific | 2019 |
| Sandal Lizard Associates Ltd | Information & communication | 2019 |
| Sandbox Capital Limited | Extraterritorial | 2024 |
| SBO (Yorkshire) Ltd | Health & social care | 2015 |
| Sbtb Limited | Hospitality | 2022 |
| Scalerail Limited | Manufacturing | 2008 |
| Scarlat Logitech Limited | Information & communication | 2010 |
| Scott Ainsworth Ltd | Construction | 2017 |
| SCS Steelwork Solutions Ltd | Manufacturing | 2024 |
| Sculpt UK Wellness Ltd | Other services | 2026 |
| SD Mermaid Ltd | Hospitality | 2023 |
| SDA Studios Ltd | Hospitality | 2020 |
| Sealex Limited | Professional & scientific | 1982 |
| Security Mystique Ltd | Administrative & support | 2025 |
| SEE Switches Limited | Wholesale & retail | 2012 |
| Seer Consultancy Ltd | Professional & scientific | 2018 |
| Sensational Education Limited | Education | 2025 |
| Sentinel Epos and Solutions Ltd | Professional & scientific | 2017 |
| Sephid Ltd | Real estate | 2020 |
| Seraphina Sales & Lettings Ltd | Real estate | 2013 |
| Service Awakenings Ltd | Wholesale & retail | 2017 |
| SES Ventures Limited | Real estate | 2025 |
| Sett and Stone Ltd | Information & communication | 2026 |
| Severlan Limited | Extraterritorial | 2012 |
| SG Insulation (UK) Ltd | Construction | 2023 |
| Shackleton Duke Executive Search Limited | Administrative & support | 2015 |
| Shape Supply Interiors Ltd | Wholesale & retail | 2025 |
| Sharon Westbury Ltd | Financial services | 2021 |
| Sharp Property Solutions Ltd | Real estate | 2023 |
| Sheepfold Limited | Real estate | 2013 |
| Shenward Group Holdings (NO. 2) Limited | Financial services | 2021 |
| Shenward Group Holdings Limited | Financial services | 2018 |
| Shenward LLP | | 2018 |
| Shenward Real Estate Limited | Real estate | 2021 |
| Shere Trading Limited | Administrative & support | 2013 |
| Sherkan Motor Group Ltd | Wholesale & retail | 2025 |
| Shifamed Ltd | Health & social care | 2025 |
| Shipley Finance Limited | Extraterritorial | 1971 |
| Shire Supplies Limited | Construction | 2004 |
| Shires Developments (Langley Marina) Limited | Mining & quarrying | 2007 |
| Show Support (Live) Limited | Health & social care | 2022 |
| Siem Supranite Limited | Manufacturing | 2025 |
| Signs Solutions Limited | Manufacturing | 2017 |
| Silkwood Studios Ltd | Professional & scientific | 2023 |
| Silver FOX (1980) Limited | Professional & scientific | 2012 |
| Silver Screens Limited | Extraterritorial | 2009 |
| Silverthorn Group Limited | Administrative & support | 2018 |
| SIM Collective Limited | Education | 2026 |
| Simco Supermarkets Limited | Extraterritorial | 1970 |
| Simply Fit Personal Training Ltd | Arts & recreation | 2022 |
| Sixty SIX Ltd | Professional & scientific | 2026 |
| SJ Elite Search Limited | Administrative & support | 2020 |
| SJN Services & Repairs Ltd | Construction | 2024 |
| SJR Contracting (Yorkshire) Limited | Construction | 2014 |
| SJT Autogates Ltd | Construction | 2022 |