| Lwuk Ltd | Manufacturing | 2017 |
| LXB Express Ltd | Transport & logistics | 2024 |
| Lxtricity Limited | Professional & scientific | 2006 |
| LY Food and Wellness Limited | Manufacturing | 2025 |
| LY VU Ltd | Hospitality | 2023 |
| Lyceum Kingpin 1 Limited | Energy | 2015 |
| Lyceum Kingpin 2 Limited | Energy | 2015 |
| Lyceum Kingpin 3 Limited | Energy | 2015 |
| Lyceum Nala Limited | Energy | 2015 |
| Lyceum Pumbaa Limited | Energy | 2015 |
| Lyceum Radiate 1 Limited | Energy | 2013 |
| Lyceum Radiate 2 Limited | Energy | 2014 |
| Lyceum Simba Limited | Energy | 2015 |
| Lyceum SPV 10 Limited | Energy | 2011 |
| Lyceum SPV 105 Limited | Energy | 2013 |
| Lyceum SPV 106 Limited | Energy | 2013 |
| Lyceum SPV 109 Limited | Energy | 2013 |
| Lyceum SPV 115 Limited | Energy | 2013 |
| Lyceum SPV 123 Limited | Energy | 2013 |
| Lyceum SPV 135 Limited | Energy | 2013 |
| Lyceum SPV 143 Limited | Energy | 2013 |
| Lyceum SPV 160 Limited | Energy | 2014 |
| Lyceum SPV 169 Limited | Energy | 2014 |
| Lyceum SPV 170 Limited | Energy | 2014 |
| Lyceum SPV 180 Limited | Energy | 2014 |
| Lyceum SPV 20 Limited | Energy | 2011 |
| Lyceum SPV 200 Limited | Energy | 2014 |
| Lyceum SPV 224 Limited | Energy | 2015 |
| Lyceum SPV 26 Limited | Energy | 2011 |
| Lyceum SPV 32 Limited | Energy | 2011 |
| Lyceum SPV 39 Limited | Energy | 2011 |
| Lyceum SPV 40 Limited | Energy | 2011 |
| Lyceum SPV 42 Limited | Energy | 2012 |
| Lyceum SPV 44 Limited | Energy | 2012 |
| Lyceum SPV 49 Limited | Energy | 2012 |
| Lyceum SPV 5 Limited | Energy | 2011 |
| Lyceum SPV 50 Limited | Energy | 2012 |
| Lyceum SPV 54 Limited | Energy | 2012 |
| Lyceum SPV 69 Limited | Energy | 2012 |
| Lyceum SPV 74 Limited | Energy | 2012 |
| Lyceum SPV 76 Limited | Energy | 2012 |
| Lyceum SPV 79 Limited | Energy | 2012 |
| Lyceum SPV 8 Limited | Energy | 2011 |
| Lyceum Timon Limited | Energy | 2015 |
| Lycia Consulting Ltd | Professional & scientific | 2011 |
| Lycom Dynamics Ltd | Professional & scientific | 2022 |
| Lydaco Nominees Limited | Administrative & support | 1989 |
| Lyde Green Developments Ltd | Construction | 2024 |
| Lyde Green Retail Ltd | Real estate | 2021 |
| Lydia Investment Ltd. | Real estate | 2019 |
| Lydia Solutions Ltd | Extraterritorial | 2026 |
| Lydian Planning Limited | Professional & scientific | 2025 |
| Lydiard Captial Ltd | Real estate | 2023 |
| Lydiard Productions Ltd | Information & communication | 2023 |
| Lydwin Grange Management Company Limited | Households | 2015 |
| Lyfe Health Bath Limited | Health & social care | 2020 |
| Lyfe Health Bournemouth Limited | Health & social care | 2020 |
| Lyfe Health Bristol City Centre Limited | Health & social care | 2020 |
| Lyfe Health Bristol Downend Limited | Health & social care | 2020 |
| Lyfe Health Bristol Westbury on Trym Limited | Health & social care | 2020 |
| Lyfe Health Cheltenham Limited | Health & social care | 2020 |
| Lyfe Health Diagnostics Limited | Administrative & support | 2023 |
| Lyfe Health Isle of Wight Limited | Health & social care | 2020 |
| Lyfe Health Keynsham Limited | Health & social care | 2020 |
| Lyfe Health Midsomer Norton Limited | Health & social care | 2020 |
| Lyfe Health Newport Limited | Health & social care | 2020 |
| Lyfe Health Nutrition Limited | Health & social care | 2024 |
| Lyfe Technology Limited | Information & communication | 2015 |
| Lyke Design Ltd | Professional & scientific | 2024 |
| Lykke Digital Limited | Professional & scientific | 2021 |
| Lykke Digital Services Limited | Professional & scientific | 2023 |
| Lykkeli CIC | Information & communication | 2020 |
| Lylmed Transport Ltd | Wholesale & retail | 2021 |
| LYM (Ukli) Limited | Financial services | 2021 |
| Lymefish Limited | Agriculture & fishing | 2021 |
| Lynash Limited | Administrative & support | 2019 |
| Lynchpin Property Management Limited | Real estate | 2015 |
| Lyndale Management Company Limited | Households | 1988 |
| Lyndhurst Court (Clifton) Management Limited | Real estate | 1974 |
| Lyndhurst Management Company Limited | Households | 1986 |
| Lyne Management Ltd | Professional & scientific | 2019 |
| Lyneham Meadows Management Company Limited | Households | 2026 |
| Lynetcare Limited | Health & social care | 2018 |
| Lynwood Civil Engineering Limited | Construction | 2001 |
| Lynwood Management Holdings Limited | Real estate | 2023 |
| Lynwood Plant Hire Limited | Construction | 2011 |
| Lynwood Property Group Ltd | Construction | 2026 |
| Lyon PR Limited | Professional & scientific | 2011 |
| Lyons ABS Limited | Professional & scientific | 2012 |
| Lyons and Kyte Limited | Real estate | 2016 |
| Lyons Davidson Limited | Professional & scientific | 2011 |
| Lyons Davidson Trustee Company Limited | Financial services | 1992 |
| Lypow Ltd | Hospitality | 2026 |
| Lyra Bristol Poetry Festival Community Interest Company | Other services | 2022 |
| Lyra Legal Services Limited | Professional & scientific | 2019 |
| Lyrebird Consulting Ltd | Professional & scientific | 2020 |
| LYT Engineering Limited | Professional & scientific | 2018 |
| Lytehouse Counselling Services Ltd | Health & social care | 2023 |
| Lytx Europe Limited | Wholesale & retail | 2007 |
| Lyubo Transport Ltd | Transport & logistics | 2026 |