| SMH Howard Matthews Ltd | Professional & scientific | 2023 |
| SMH Jolliffe Cork Audit Ltd | Professional & scientific | 2021 |
| SMH Jolliffe Cork Ltd | Professional & scientific | 2021 |
| SMH Malcolm Harris & Co Ltd | Professional & scientific | 2022 |
| SMH Management Services 1 Limited | Extraterritorial | 2024 |
| SMH Management Services 2 Limited | Extraterritorial | 2024 |
| SMH Management Services Limited | Professional & scientific | 2024 |
| SMH Maverick Audit Limited | Professional & scientific | 2025 |
| SMH Mitchells Limited | Professional & scientific | 2003 |
| SMH Mitchells Topco 1 Limited | Professional & scientific | 2017 |
| SMH Mitchells Topco 2 Limited | Professional & scientific | 2023 |
| SMH Probate Services Ltd | Professional & scientific | 2024 |
| SMH Reed Smith Ltd | Financial services | 2015 |
| SMH Sheards Audit Limited | Professional & scientific | 2024 |
| SMH Sheards Limited | Professional & scientific | 2009 |
| SMH Shelfco Ltd | Professional & scientific | 2024 |
| SMH Topco Limited | Financial services | 2024 |
| SMH Wills Services Ltd | Professional & scientific | 2011 |
| SMH001 Limited | Arts & recreation | 2023 |
| SMH180 Ltd | Financial services | 2025 |
| SMHRS1 Ltd. | Financial services | 2015 |
| SMHRS2 Ltd | Professional & scientific | 2001 |
| SMHRS3 Ltd | Professional & scientific | 2001 |
| SMI Investments Limited | Financial services | 2026 |
| Smia Enterprise Ltd | Professional & scientific | 2022 |
| Smile & Snooze Solutions Ltd | Health & social care | 2026 |
| Smile Back Ltd | Professional & scientific | 2026 |
| Smile Business Support Limited | Professional & scientific | 2021 |
| Smile Cattery Boarding Ltd | Agriculture & fishing | 2024 |
| Smile Cattery Limited | Agriculture & fishing | 2016 |
| Smile Developments Ltd | Real estate | 2021 |
| Smilekit UK Ltd | Wholesale & retail | 2025 |
| Smiles by DR a Ltd | Health & social care | 2025 |
| Smiles Powder UK - Sonics 1 Limited | Manufacturing | 2022 |
| Smiles Powder UK - Sonics 10 Limited | Manufacturing | 2022 |
| Smiles Powder UK - Sonics 2 Limited | Manufacturing | 2022 |
| Smiles Powder UK - Sonics 3 Limited | Manufacturing | 2022 |
| Smiles Powder UK - Sonics 4 Limited | Manufacturing | 2022 |
| Smiles Powder UK - Sonics 5 Limited | Manufacturing | 2022 |
| Smiles Powder UK - Sonics 6 Limited | Manufacturing | 2022 |
| Smiles Powder UK - Sonics 7 Limited | Manufacturing | 2022 |
| Smiles Powder UK - Sonics 8 Limited | Manufacturing | 2022 |
| Smiles Powder UK - Sonics 9 Limited | Manufacturing | 2022 |
| Smiles Recruitment Limited | Administrative & support | 2011 |
| Smiles Teeth Whitening Products Franchise 10 Limited | Manufacturing | 2022 |
| Smiles Teeth Whitening Products Franchise 11 Limited | Manufacturing | 2022 |
| Smiles Teeth Whitening Products Franchise 12 Limited | Manufacturing | 2022 |
| Smiles Teeth Whitening Products Franchise 9 Limited | Manufacturing | 2022 |
| Smirk Investments Limited | Manufacturing | 2020 |
| Smirk Oral Care Ltd | Manufacturing | 2023 |
| Smirk Teeth Whitening Products Franchise 1 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 13 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 14 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 15 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 16 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 17 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 18 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 19 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 2 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 20 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 21 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 22 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 23 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 24 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 25 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 26 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 27 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 28 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 3 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 4 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 5 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 6 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 7 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Franchise 8 Limited | Manufacturing | 2022 |
| Smirk Teeth Whitening Products Ltd | Wholesale & retail | 2021 |
| Smith & Tissington Ltd | Wholesale & retail | 2026 |
| Smith & Todd Construction Mechanical & Electrical Ltd | Construction | 2022 |
| Smith Consulting Limited | Professional & scientific | 2012 |
| Smith Craven Ltd | Administrative & support | 2025 |
| Smith Family Homes Limited | Real estate | 2025 |
| Smith Peevor Ltd | Health & social care | 2026 |
| Smith Self Drive Limited | Real estate | 2025 |
| Smith Street Coffee Roasters Limited | Manufacturing | 2020 |
| Smith Street Coffee Shop Limited | Wholesale & retail | 2025 |
| Smith X Smith Limited | Wholesale & retail | 2016 |
| Smith Young Holdings Limited | Professional & scientific | 2019 |
| Smith Young Limited | Professional & scientific | 2015 |
| Smith's Maintenance Services Ltd | Construction | 2025 |
| Smith-Richardson Properties Limited | Real estate | 2025 |
| Smithdown Ltd | Real estate | 2001 |
| Smithfield Flats (Maintenance) Limited | Households | 1975 |
| Smithfield House (Fvss) Limited | Professional & scientific | 1934 |
| Smithfield Property Company Limited | Professional & scientific | 2020 |
| Smithtech Studios Ltd | Information & communication | 2025 |
| Smithy Wood Bottom Limited | Professional & scientific | 2007 |
| Smithy Wood Business Parks Development LLP | | 2006 |
| Smithy Wood Limited | Real estate | 2015 |
| Smithy Wood Management Company Limited | Real estate | 2009 |
| Smithy Works Limited | Manufacturing | 2014 |
| Smithywood Properties Ltd | Real estate | 2019 |