| S.I City Engineering Ltd | Real estate | 2005 |
| S.Krausz (MCR) Ltd | Real estate | 2021 |
| S.M.Recovery 24HR Car, Van, Motorbike, National and Local Breakdown Recovery Ltd | Transport & logistics | 2026 |
| S.T. Advertising Ltd | Professional & scientific | 2011 |
| S.W.D. (Wholesale) Limited | Wholesale & retail | 1972 |
| S1 Self Storage Barnsley Ltd | Transport & logistics | 2020 |
| S1 Self Storage Blackburn Ltd | Transport & logistics | 2020 |
| S1 Self Storage Burnley Ltd | Transport & logistics | 2020 |
| S1 Self Storage Derby Ltd | Transport & logistics | 2020 |
| S1 Self Storage Ellesmere Port Ltd | Transport & logistics | 2020 |
| S1 Self Storage Glasgow Ltd | Transport & logistics | 2020 |
| S1 Self Storage Leeds Ltd | Transport & logistics | 2020 |
| S1 Self Storage Liverpool Ltd | Transport & logistics | 2020 |
| S1 Self Storage Ltd | Transport & logistics | 2020 |
| S1 Self Storage Manchester Ltd | Transport & logistics | 2020 |
| S1 Self Storage Mansfield Ltd | Transport & logistics | 2020 |
| S1 Self Storage Preston Ltd | Transport & logistics | 2020 |
| S1 Self Storage Rochdale Ltd | Transport & logistics | 2020 |
| S1 Self Storage Rushden Ltd | Transport & logistics | 2020 |
| S1 Self Storage ST Helens Ltd | Transport & logistics | 2020 |
| S1 Self Storage Wakefield Ltd | Transport & logistics | 2020 |
| S1 Store Space Ltd | Transport & logistics | 2020 |
| S2 Logistics Ltd | Administrative & support | 2025 |
| SAA Smiles Ltd | Health & social care | 2026 |
| Saad Manzoor Ltd | Wholesale & retail | 2026 |
| Saadoun Ltd | Transport & logistics | 2024 |
| Saam Legal Services Ltd | Professional & scientific | 2024 |
| Saamz Ltd | Wholesale & retail | 2025 |
| Saas Xprt Ltd | Information & communication | 2023 |
| SAB Trading Corporation Ltd | Wholesale & retail | 2024 |
| Saba Superstore Ltd | Wholesale & retail | 2025 |
| Sabfex Solutions Ltd | Other services | 2025 |
| Sablite Ltd | Wholesale & retail | 2009 |
| Sabores DEL Peru Ltd | Hospitality | 2025 |
| Sabr Living Ltd | Real estate | 2026 |
| Sach Real Estates Ltd | Real estate | 2026 |
| Sachah Entertainments Ltd | Arts & recreation | 2025 |
| Sachimo Football Agency Ltd | Other services | 2020 |
| Sadeem Ltd | Transport & logistics | 2024 |
| Saeed Medical Ltd | Health & social care | 2018 |
| Safe Lets Ltd | Real estate | 2026 |
| Safehaven Youth CIC | Professional & scientific | 2024 |
| Safemotion Baltic Ltd | Wholesale & retail | 2026 |
| Safer Books MCR Ltd | Professional & scientific | 2020 |
| Safer Space Support C.I.C. | Real estate | 2024 |
| Saffron Capital Lending Partners Ltd | Financial services | 2025 |
| Saffron Capital Lending Solutions Ltd | Financial services | 2026 |
| Sage Social Limited | Professional & scientific | 2025 |
| Sahara Avenues Limited | Administrative & support | 2020 |
| Sahlèa & Co Ltd | Manufacturing | 2025 |
| SAI (MCR) Ltd | Wholesale & retail | 2018 |
| Saint Croix Media Ltd | Other services | 2019 |
| Saint Indie Media Ltd | Other services | 2019 |
| Saint Indie Music Ltd. | Other services | 2020 |
| Saint John Media Ltd | Other services | 2019 |
| Saint Thomas Media Limited | Other services | 2019 |
| Saintstar Ltd | Information & communication | 2025 |
| Saira Property Group Ltd | Real estate | 2016 |
| Sakura (Salford) Limited | Hospitality | 2024 |
| SAL Haulage Limited | Wholesale & retail | 2019 |
| Salboy (Narrowcliff Newquay) Limited | Construction | 2021 |
| Salboy (SPV Co 2) Limited | Construction | 2022 |
| Salboy (SPV Co 3) Limited | Construction | 2022 |
| Salboy (SPV Co 4) a Limited | Construction | 2024 |
| Salboy (SPV Co 4) B Limited | Real estate | 2026 |
| Salboy (SPV Co 4) Limited | Construction | 2022 |
| Salboy (SPV Co 5) Limited | Construction | 2024 |
| Salboy (Tuckingmill) Limited | Construction | 2022 |
| Salboy BP Limited | Financial services | 2019 |
| Salboy BP SPV 10 Limited | Construction | 2020 |
| Salboy BP SPV 11 Limited | Construction | 2020 |
| Salboy BP SPV 12 Limited | Construction | 2020 |
| Salboy BP SPV 13 Limited | Construction | 2020 |
| Salboy BP SPV 14 Limited | Construction | 2020 |
| Salboy BP SPV 15 Limited | Construction | 2020 |
| Salboy BP SPV 16 Limited | Construction | 2020 |
| Salboy BP SPV 17 Limited | Construction | 2020 |
| Salboy BP SPV 18 Limited | Construction | 2020 |
| Salboy BP SPV 19 Limited | Construction | 2020 |
| Salboy BP SPV 2 Limited | Construction | 2019 |
| Salboy BP SPV 20 Limited | Construction | 2020 |
| Salboy BP SPV 21 Limited | Construction | 2021 |
| Salboy BP SPV 22 Limited | Construction | 2021 |
| Salboy BP SPV 23 Limited | Construction | 2021 |
| Salboy BP SPV 24 Limited | Construction | 2021 |
| Salboy BP SPV 25 Limited | Construction | 2021 |
| Salboy BP SPV 26 Limited | Construction | 2021 |
| Salboy BP SPV 27 Limited | Construction | 2021 |
| Salboy BP SPV 28 Limited | Construction | 2021 |
| Salboy BP SPV 29 Limited | Construction | 2021 |
| Salboy BP SPV 3 Limited | Construction | 2019 |
| Salboy BP SPV 30 Limited | Construction | 2021 |
| Salboy BP SPV 31 Limited | Construction | 2021 |
| Salboy BP SPV 32 Limited | Construction | 2021 |
| Salboy BP SPV 33 Limited | Construction | 2021 |
| Salboy BP SPV 34 Limited | Construction | 2021 |
| Salboy BP SPV 35 Limited | Construction | 2021 |
| Salboy BP SPV 36 Limited | Construction | 2021 |
| Salboy BP SPV 37 Limited | Construction | 2021 |
| Salboy BP SPV 38 Limited | Construction | 2021 |