| Kutir Capital Ltd | Real estate | 2019 |
| KW Marketing SW Ltd | Professional & scientific | 2022 |
| KW Megabyte Solutions Limited | Wholesale & retail | 2025 |
| Kwame's Creative Solutions Ltd | Information & communication | 2025 |
| KWH Auto Repairs Ltd | Wholesale & retail | 2023 |
| Kwiecien Cars Ltd | Wholesale & retail | 2016 |
| Kycermann Limited | Information & communication | 2020 |
| Kynaston Auto Bodies (Exeter) Ltd | Wholesale & retail | 1998 |
| Kyne: Assistive Technology Ltd | Education | 2021 |
| Kyra Associates Limited | Professional & scientific | 2024 |
| L & H Family Investments Limited | Real estate | 2024 |
| L & M Autoelectrical Ltd | Wholesale & retail | 2022 |
| L and J Fascias and Guttering Ltd | Construction | 2026 |
| L and J Painters and Decorators Ltd | Construction | 2026 |
| L B Bricklaying Contractors Ltd | Construction | 2019 |
| L Donovan & Co. Ltd | Professional & scientific | 2016 |
| L Grosset Ltd | Professional & scientific | 2025 |
| L Hill Electrical Ltd | Energy | 2016 |
| L J Assets SW Ltd | Administrative & support | 2024 |
| L J Properties SW Ltd | Real estate | 2020 |
| L M H Roofing Limited | Construction | 2016 |
| L Poole Ltd | Manufacturing | 2024 |
| L S Properties (Exeter) Limited | Real estate | 2016 |
| L V Electrical Services Limited | Construction | 2020 |
| L&L Diverse Solutions Limited | Professional & scientific | 2018 |
| L&M Fast Delivery Ltd | Transport & logistics | 2025 |
| L-T Strategic Solutions Ltd | Professional & scientific | 2024 |
| L.B.W Investments Limited | Real estate | 2020 |
| L.J.Last Limited | Construction | 1959 |
| L.P.A Holdings & Investments Ltd | Real estate | 2021 |
| L.V.D (SW) Ltd | Hospitality | 2024 |
| L2R Properties Limited | Construction | 2022 |
| L2R2 Properties Ltd | Construction | 2024 |
| LA Campagna Bar & Restaurant Limited | Hospitality | 2016 |
| LA Campagna Chard Ltd | Hospitality | 2020 |
| LA Clarke Ltd | Real estate | 2021 |
| LA FAB Construct Ltd | Manufacturing | 2026 |
| LA Fabrico Limited | Wholesale & retail | 2017 |
| LA LA Choirs Ltd | Arts & recreation | 2013 |
| LA Scaffolding Southwest Ltd | Construction | 2016 |
| LA Trading Services Ltd | Wholesale & retail | 2025 |
| LA Vita Ltd | Hospitality | 2016 |
| LAB13 Design Ltd | Professional & scientific | 2020 |
| Label-Form Limited | Manufacturing | 1964 |
| Laboratory Analysis Limited | Administrative & support | 1987 |
| Labour Link Recruitment Ltd | Administrative & support | 2025 |
| Labour South West Ltd | Administrative & support | 2017 |
| Lace and Lavender Ltd | Wholesale & retail | 2025 |
| Lacelike Limited | Administrative & support | 2011 |
| Laceworks Living Limited | Construction | 2020 |
| Laceworks Residents Management Company Limited | Households | 2026 |
| Lackford Estate Solar Park Limited | Energy | 2013 |
| Laclare Limited | Real estate | 2013 |
| Ladds of Crediton Ltd | Wholesale & retail | 1998 |
| Lafraiz Ltd | Wholesale & retail | 2010 |
| Lagness Solar Farm Limited | Energy | 2014 |
| LAH Environmental Ltd | Transport & logistics | 2025 |
| Lai's Limited | Hospitality | 2000 |
| Lai-Mi Property Ltd | Real estate | 2023 |
| Laing Bespoke Limited | Construction | 2015 |
| Lakeside Alpacas Ltd | Agriculture & fishing | 2021 |
| Lakeview Rise Owners' Association Limited | Households | 2005 |
| Lambert View Management Company Limited | Households | 2002 |
| Lambo Restaurants Ltd | Hospitality | 2024 |
| Lamp Technologies Ltd | Information & communication | 2013 |
| Lana Springs Limited | Agriculture & fishing | 2013 |
| Land Appraisals UK Limited | Real estate | 2025 |
| Landas Environmental Ltd | Professional & scientific | 2025 |
| Landlord Direct Properties LLP | | 2023 |
| Landlord Direct Property Ltd | Hospitality | 2023 |
| Landlord Direct Property Management Ltd | Real estate | 2012 |
| Landmark Analytics Limited | Professional & scientific | 2004 |
| Landmark Information Group Limited | Information & communication | 1994 |
| Landmark London Asset Holdings Limited | Financial services | 2021 |
| Landmark Optimus Ltd | Financial services | 2005 |
| Landmark Valuation Services Limited | Information & communication | 1982 |
| Landscove Holidays Limited | Hospitality | 1993 |
| Lane Portfolio Limited | Real estate | 2021 |
| Langdon Transport Limited | Transport & logistics | 2003 |
| Langer Lane Solar Farm Limited | Energy | 2021 |
| Langfast Limited | Real estate | 2002 |
| Langford Bridge Limited | Agriculture & fishing | 2021 |
| Langsford Crimson Limited | Information & communication | 2015 |
| Language of Smiles Ltd | Health & social care | 2023 |
| Lansdowne Management Co. Limited | Households | 1981 |
| Lansdowne Terrace (Exeter) Limited | Households | 1987 |
| Lantern Holdings Limited | Real estate | 2020 |
| Lantern Rooms Productions Ltd | Information & communication | 2026 |
| Lanterns Kebab and Steak House Limited | Hospitality | 1995 |
| Lantic Commercial Building Surveyors Ltd | Professional & scientific | 2024 |
| Lantoom Meadows Management Company Limited | Households | 2015 |
| Lapfordwood Limited | Agriculture & fishing | 1996 |
| Lares Properties Limited | Real estate | 2019 |
| Lark View Tencreek Management Company Limited | Households | 2026 |
| Larntan Digital Limited | Wholesale & retail | 2023 |
| Laser Adventure Holidays Limited | Arts & recreation | 1989 |
| Laser Carve Engraving Limited | Other services | 2014 |
| Laser Crafter Limited | Extraterritorial | 2020 |
| Lashxtend EA Ltd | Other services | 2023 |
| Last House Media Ltd | Information & communication | 2021 |