| Serv Concepts Limited | Arts & recreation | 2025 |
| Servacom Properties LLP | | 2023 |
| Serve North West CIC | Administrative & support | 2025 |
| Serviam Consultancy Limited | Professional & scientific | 2021 |
| Service Accommodation Limited | Real estate | 2024 |
| Service and Supplies Direct Ltd | Administrative & support | 2018 |
| Service Electrical Distributors Group Limited | Financial services | 2024 |
| Serviced Apartments Stanley ST Ltd | Real estate | 2021 |
| Serviced Living Liverpool Ltd | Hospitality | 2018 |
| Serviced Living Management Ltd | Real estate | 2019 |
| Serving Stories Limited | Wholesale & retail | 2026 |
| Servistm Limited | Wholesale & retail | 2023 |
| Servizi Care Services Limited | Health & social care | 2024 |
| Servizi Properties Ltd | Real estate | 2026 |
| Sesima Limited | Financial services | 2005 |
| Sessile Consultancy Ltd | Information & communication | 2021 |
| Session Technology Limited | Information & communication | 2026 |
| Sessionlinked Ltd | Information & communication | 2026 |
| SET Decor Ltd | Arts & recreation | 2019 |
| SET the Social Ltd | Professional & scientific | 2025 |
| Seta Group Limited | Other services | 2016 |
| Seths Services Ltd | Wholesale & retail | 2026 |
| Setting Steps Support Services Ltd | Administrative & support | 2020 |
| Settlement Agreement Law Limited | Professional & scientific | 2025 |
| Sevad Services Limited | Information & communication | 2019 |
| Sevans Media Ltd | Information & communication | 2024 |
| Sevcadei Ltd | Construction | 2025 |
| Sevcan Health Tourism Consultancy Ltd | Health & social care | 2021 |
| Sevco 5054 Limited | Real estate | 2011 |
| Seven 2 Seven Transport Ltd | Transport & logistics | 2018 |
| Seven Acres Retreats Ltd | Hospitality | 2025 |
| Seven Auto Sales Ltd | Wholesale & retail | 2025 |
| Seven Cash Ltd | Information & communication | 2016 |
| Seven Clarendon Limited | Real estate | 2017 |
| Seven Consultancy (North West) Ltd | Real estate | 2023 |
| Seven Dozen Limited | Financial services | 2014 |
| Seven Glass House Ltd | Real estate | 2025 |
| Seven Hawker Place Ltd | Real estate | 2022 |
| Seven Holding (NW) Ltd | Hospitality | 2025 |
| Seven Images Limited | Professional & scientific | 2009 |
| Seven Media Design Ltd | Information & communication | 2011 |
| Seven Oakmere 3 Ltd | Real estate | 2026 |
| Seven Oakmere Ltd | Real estate | 2024 |
| Seven Oxford Avenue Ltd | Real estate | 2024 |
| Seven Pines Limited | Arts & recreation | 2025 |
| Seven Sauna Ltd | Other services | 2026 |
| Seven Seven Clothing Limited | Wholesale & retail | 2026 |
| Seven Sisters Properties Ltd | Real estate | 2021 |
| Seven Stars Developments Ltd | Real estate | 2002 |
| Seven Stay Group Limited | Hospitality | 2023 |
| Seven Storage Ltd | Real estate | 2026 |
| Seven Streets Production House Ltd | Information & communication | 2023 |
| Seven Streets Studio Ltd | Wholesale & retail | 2021 |
| Seven Stuart Road Limited | Real estate | 1991 |
| Seven Tower Wharf Ltd | Real estate | 2022 |
| Seven Transport Ltd | Transport & logistics | 2024 |
| SEVEN20.IO Ltd | Information & communication | 2018 |
| Sevenco Ltd | Hospitality | 2024 |
| Seventeen Ventures Ltd | Administrative & support | 2019 |
| SEVENTEEN7 Media Limited | Information & communication | 2019 |
| Seventh Virtue Ltd | Information & communication | 2016 |
| Seventy Five Trading Ltd | Other services | 2014 |
| Sevenwells Trust | Education | 2019 |
| Severn Crushing Limited | Mining & quarrying | 2018 |
| Severnside Software Limited | Information & communication | 1989 |
| Sevio Ltd | Wholesale & retail | 2021 |
| Sevoa Ltd | Professional & scientific | 2021 |
| Sevoa Properties Ltd | Real estate | 2022 |
| SEW & SEW Limited | Other services | 2010 |
| SEW Europe Limited | Wholesale & retail | 2005 |
| Sewells Training and Consultancy Limited | Administrative & support | 1983 |
| Sewerscan UK Ltd | Professional & scientific | 2023 |
| Sewing Connection C.I.C. | Education | 2023 |
| Sewing Shop Ltd | Manufacturing | 2024 |
| SEX Equality and Equity Network Limited | Professional & scientific | 2024 |
| Seymike Limited | Real estate | 2010 |
| Seymour Lettings Ltd | Hospitality | 2013 |
| Seymour Street Property Ltd | Real estate | 2025 |
| Seymour Terrace (Liverpool) Management Company Limited | Households | 1995 |
| Seymour Terrace Holdings Ltd | Real estate | 2023 |
| Seypaul Limited | Real estate | 2010 |
| Seyphil Limited | Real estate | 2010 |
| SF Create Ltd | Professional & scientific | 2015 |
| SF Electronics Hub Ltd | Wholesale & retail | 2024 |
| SF Legacy Ltd | Real estate | 2026 |
| SF NW Properties Limited | Real estate | 2024 |
| SF Property Development Ltd | Real estate | 2025 |
| SF Warrington Ltd | Other services | 2023 |
| SFB Investments Limited | Other services | 2023 |
| SFB JV Limited | Other services | 2023 |
| SFB Property Holdings Limited | Financial services | 2021 |
| SFB Property Limited | Real estate | 2021 |
| SFC Spring Festival Ltd | Arts & recreation | 2025 |
| SFC1 Ltd | Financial services | 2020 |
| SFC2 Ltd | Financial services | 2020 |
| SFC3 Ltd | Financial services | 2023 |
| SFC4 Ltd | Financial services | 2024 |
| Sfff Roofing Ltd | Construction | 2026 |
| Sfgaming Ltd | Information & communication | 2026 |
| SFH Brickwork Ltd | Construction | 2021 |