| Speedy Dans Deliverys Ltd | Transport & logistics | 2025 |
| Speedy Leeds Ltd | Transport & logistics | 2013 |
| Speedy TK Limited | Information & communication | 2024 |
| Speedyexpressdelivery Ltd | Transport & logistics | 2025 |
| Speet Analytics Ltd | Information & communication | 2025 |
| Speight Consultancy Services Limited | Information & communication | 2007 |
| Spektrum RDS Limited | Professional & scientific | 2021 |
| Spen Lane Cleaners Ltd | Other services | 2017 |
| Spen Road Management Company Limited | Households | 2002 |
| Spencar Consultancy Ltd | Professional & scientific | 2019 |
| Spence Deli Limited | Hospitality | 2022 |
| Spencer Capital Limited | Professional & scientific | 2025 |
| Spencer Court Property Management Company Limited | Households | 2024 |
| Spencer Flint Automotive Limited | Wholesale & retail | 2021 |
| Spencer Hogg Limited | Professional & scientific | 2019 |
| Spencer Properties (UK) Limited | Real estate | 2003 |
| Spencer Rigby Ltd | Administrative & support | 2023 |
| Spencer Riley Limited | Administrative & support | 2014 |
| Spencer Security and Protection Services Ltd | Hospitality | 2018 |
| Spencer Signs Limited | Manufacturing | 1987 |
| Spencer Woods (Leeds) Limited | Professional & scientific | 2017 |
| Spencers Solicitors Limited | Professional & scientific | 2007 |
| Spenfield Court (Leeds) Management Company Limited | Households | 2019 |
| SPG Commercials Limited | Professional & scientific | 2025 |
| SPG Management(Uk) Ltd | Professional & scientific | 2009 |
| SPG Property Services Ltd | Administrative & support | 2011 |
| SPG Refurbs Ltd. | Administrative & support | 2020 |
| SPG Windscreens Ltd | Wholesale & retail | 2017 |
| SPH Aspire Limited | Hospitality | 2020 |
| Sphd Limited | Other services | 2015 |
| Sphere Health Ltd | Information & communication | 2006 |
| Sphere Memory and Rehabilitation Team (Smart) Limited | Health & social care | 2014 |
| Sphere Salaries Limited | Administrative & support | 2023 |
| Sphinx Medical Services Ltd | Health & social care | 2022 |
| Spica Limited | Financial services | 2026 |
| Spica's Child Limited | Wholesale & retail | 2021 |
| Spice Chilli HUT Limited | Hospitality | 2025 |
| Spice Clay Oven Ltd | Hospitality | 2023 |
| Spice Corner of Leeds Ltd | Wholesale & retail | 2025 |
| Spice Guyz Ltd | Hospitality | 2026 |
| Spice House Gold Limited | Hospitality | 2019 |
| Spice House Leeds Ltd | Hospitality | 2026 |
| Spice Lounge (Swinton) Limited | Hospitality | 2017 |
| Spice Lounge LS27 Ltd | Hospitality | 2025 |
| Spice Oven Ltd | Hospitality | 2026 |
| SPICE25 Ltd | Hospitality | 2025 |
| Spiceology Ltd | Hospitality | 2020 |
| Spiceq Ltd | Hospitality | 2025 |
| Spicers Limited | Wholesale & retail | 1946 |
| Spicewala Ltd | Wholesale & retail | 2014 |
| Spicezone Crossgate Ltd | Hospitality | 2023 |
| Spick N Spann Ltd | Administrative & support | 2025 |
| Spider Optic Ltd | Information & communication | 2018 |
| Spike Digital Limited | Information & communication | 2010 |
| Spike Group Ltd | Professional & scientific | 2024 |
| Spike Holdings Limited | Financial services | 2025 |
| Spikes Walker Ltd | Real estate | 2021 |
| Spiky Profile Ltd | Education | 2024 |
| Spillway Cleaning Services Limited | Administrative & support | 2024 |
| Spina Healthcare Limited | Health & social care | 2006 |
| Spinal Harmony Limited | Health & social care | 2024 |
| Spindisc Entertainment Productions Ltd | Other services | 2021 |
| Spine & EYE Ltd | Health & social care | 2015 |
| Spine Align Ltd | Health & social care | 2025 |
| Spine for Life Limited | Health & social care | 2006 |
| Spine Sense Limited | Other services | 2009 |
| Spinec Ltd | Other services | 2017 |
| Spinetek Limited | Health & social care | 2012 |
| Spinikars Limited | Hospitality | 2004 |
| Spink & Edgar Limited | Manufacturing | 1986 |
| Spink & Sons Autos Ltd | Wholesale & retail | 2019 |
| Spink & Thackray Limited | Manufacturing | 2003 |
| Spink and Thackray (Leeds) Limited | Administrative & support | 2022 |
| Spinko Holdings Limited | Financial services | 2024 |
| Spinko Limited | Manufacturing | 2001 |
| Spinks Family Investment Company | Financial services | 2026 |
| Spinnaker 918 Limited | Professional & scientific | 2004 |
| Spiral Creative Group Limited | Financial services | 2023 |
| Spiral Direct Limited | Manufacturing | 1999 |
| Spiral Tech Research UK Limited | Manufacturing | 2015 |
| Spiralpe Ltd | Education | 2024 |
| Spire Testing Services Ltd | Information & communication | 2022 |
| Spireminds Limited | Professional & scientific | 2010 |
| Spires Building & Landscaping Ltd | Construction | 2020 |
| Spirit Capital Partners Fund I 'B' LP | | 2001 |
| Spirit Capital Partners Fund I (a) LP | | 2001 |
| Spirit Capital Partners Fund II LP | | 2009 |
| Spirit Fund I Carry LP | | 2008 |
| Spirit Juice Ltd | Administrative & support | 2019 |
| Spirit of Harrogate Limited | Manufacturing | 2014 |
| Spirit Resource Ltd | Information & communication | 2005 |
| Spirited Nights Ltd. | Administrative & support | 2008 |
| Spiritual Touches Ltd | Health & social care | 2026 |
| Spiroflex Limited | Extraterritorial | 2009 |
| Spitfire Central Ltd | Professional & scientific | 2026 |
| Spiz Ltd | Wholesale & retail | 2021 |
| SPJ Estates & Lettings Limited | Real estate | 2023 |
| SPK (Leeds) Limited | Financial services | 2023 |
| SPL Components Limited | Wholesale & retail | 1994 |
| SPL2014 Limited | Financial services | 2014 |