| Lemon Property Rentals Limited | Real estate | 2022 |
| Lemos DE Freitas Limited | Financial services | 2022 |
| LEN Smith Consulting Ltd | Construction | 2013 |
| Lendology CIC | Financial services | 2002 |
| Letasi Design Studio Ltd | Manufacturing | 2024 |
| Lethbridge Park Ltd | Households | 1999 |
| Leukos Consultants Limited | Other services | 2022 |
| LEV Services Limited | Professional & scientific | 2009 |
| Level Pools Limited | Financial services | 2020 |
| Level Structures Ltd | Manufacturing | 2022 |
| Levelpath Limited | Real estate | 2002 |
| Levels Web Development Ltd | Information & communication | 2024 |
| Levelsound Music Limited | Information & communication | 1999 |
| Levett Surveying Ltd | Professional & scientific | 2012 |
| Lewchie Limited | Other services | 2020 |
| Lewell Build Limited | Construction | 2015 |
| Lewell Limited | Other services | 1982 |
| Lewis Logic Ltd | Information & communication | 2026 |
| Lewis Smart Homes - Security Ltd | Administrative & support | 2014 |
| Lexanova Limited | Information & communication | 2025 |
| Lexicon Healthcare Limited | Health & social care | 2011 |
| Leyburg Ltd | Professional & scientific | 2005 |
| LG Smart Investments Ltd | Real estate | 2021 |
| Lhmoore Ltd | Professional & scientific | 2023 |
| Liberate Wealth (Taunton) Limited | Financial services | 1999 |
| Liberty Accounting Limited | Professional & scientific | 2010 |
| Libs (Services) Limited | Administrative & support | 2014 |
| Liddymore Park Management Company Limited | Households | 2022 |
| Liebrand Beheer Limited | Professional & scientific | 2008 |
| Life Guitars Co. Limited | Wholesale & retail | 2020 |
| Lifecycle Tech Limited | Water & waste | 2023 |
| Lifefitphysique Ltd | Other services | 2025 |
| Lifestyle Nutrition Ltd | Health & social care | 2015 |
| Lifesupermarket Ltd | Financial services | 2010 |
| Lift Taunton Limited | Arts & recreation | 2023 |
| LIG Property Ltd | Real estate | 2022 |
| Light Speed Electrical Ltd | Construction | 2022 |
| Ligthart UK Limited | Construction | 2021 |
| LIJN1 Assurantien & Risicobeheer LLP | | 2016 |
| Lille and Wild Ltd | Education | 2025 |
| Lily MAY (Holdings) Limited | Real estate | 2019 |
| Lilylane Farms Limited | Agriculture & fishing | 2012 |
| Limebase Products Ltd. | Manufacturing | 1994 |
| Limers Lane (Northam) Management Company Limited | Households | 2025 |
| Limeslake Limited | Manufacturing | 2009 |
| Limitless Tiling (SW) Limited | Construction | 2023 |
| Lincmed Ltd | Health & social care | 2020 |
| Lindee LU Limited | Manufacturing | 2001 |
| Line & PIN Property Ltd | Real estate | 2024 |
| Linestock Limited | Financial services | 2024 |
| Liney Estates Ltd | Hospitality | 2025 |
| Lingrey Limited | Construction | 2002 |
| Linhay Properties Limited | Real estate | 2007 |
| Linjay Solutions Limited | Administrative & support | 2021 |
| Link Community Store Ltd | Wholesale & retail | 2022 |
| Link Southwest Housing CIC | Health & social care | 2019 |
| Linkwebb.Co.Uk Ltd | Information & communication | 1999 |
| Linson Investments Limited | Financial services | 2024 |
| Lintern Estates Limited | Financial services | 2025 |
| Lion Roofing Somerset Ltd | Construction | 2019 |
| Lionbrook Retirement Rentals Limited Partnership | | 2002 |
| Lionize Media Ltd | Professional & scientific | 2018 |
| Liquid Brighton Ltd | Hospitality | 2006 |
| Liscombe Investments Ltd | Financial services | 2020 |
| Liscombe West Properties Limited | Construction | 2015 |
| Little Boots Day Nursery Limited | Education | 2013 |
| Little Explorers Day Nursery and Preschool Ltd | Health & social care | 2022 |
| Little Insights Ultrasound Ltd | Health & social care | 2009 |
| Little Nomads Learning Ltd | Education | 2022 |
| Little Redwood Limited | Financial services | 2023 |
| Little Seed Property Limited | Real estate | 2023 |
| Little Teas Limited | Hospitality | 2012 |
| Littledean Consulting Ltd | Professional & scientific | 2018 |
| Littleton Lodge Management Company Limited | Households | 2002 |
| Live in Care Ltd | Administrative & support | 2014 |
| Living Light Christian Church, Taunton | Education | 2004 |
| Living Resources Limited | Professional & scientific | 1998 |
| Living Vision Media Ltd | Professional & scientific | 2025 |
| Livo Production Ltd | Information & communication | 2021 |
| Liyan Home Care Ltd | Health & social care | 2025 |
| LIZ Brown Equine Limited | Professional & scientific | 2014 |
| LJ Digital Ltd | Professional & scientific | 2023 |
| LJ Property Developers Ltd | Construction | 2025 |
| LKD Paraplanning Limited | Financial services | 2012 |
| Llama Drama Limited | Wholesale & retail | 2023 |
| LLK Contractors Limited | Financial services | 2019 |
| LLK Property Limited | Construction | 2009 |
| Lloyd & Whyte Community Broking Ltd | Financial services | 2003 |
| Lloyd & Whyte Group Limited | Financial services | 1973 |
| Lloyd & Whyte Limited | Financial services | 1998 |
| Lloyd and Whyte (Financial Services) Limited | Financial services | 1987 |
| Lloydsvsb Limited | Real estate | 2020 |
| Llproofreading Ltd | Extraterritorial | 2011 |
| Llwfh Ltd | Health & social care | 2024 |
| Llyfnant Limited | Other services | 2022 |
| LM Property Holdings Limited | Professional & scientific | 2004 |
| LM5 Distribution Ltd | Wholesale & retail | 2024 |
| Loadace Limited | Real estate | 1989 |
| Loader's Cider Ltd | Manufacturing | 2021 |
| Loads of Logs Ltd | Agriculture & fishing | 2020 |