| L8 Casa Limited | Real estate | 2025 |
| L8CASA132 Limited | Real estate | 2026 |
| L8CASA134 Limited | Real estate | 2026 |
| L8CASA138 Limited | Real estate | 2026 |
| LA Constructive Housing Ltd | Real estate | 2024 |
| LA Corona (Javea) Limited | Real estate | 2020 |
| LA Greco Ltd | Hospitality | 2022 |
| LA Nico Property Investment Ltd | Real estate | 2024 |
| LA PAZ Coffee Co. Limited | Hospitality | 2021 |
| LA Piccola Pizzeria Ltd | Hospitality | 2024 |
| LA Properties (Staffordshire) Ltd | Real estate | 2018 |
| Labaik Gifts Ltd | Manufacturing | 2024 |
| Labelme Limited | Manufacturing | 2025 |
| Labour Express Ltd | Construction | 2015 |
| LAC Architecture Ltd | Professional & scientific | 2025 |
| LAD Estates Limited | Real estate | 2025 |
| Lady Lala Property Limited | Real estate | 2020 |
| Ladymoor Woodland Ltd | Agriculture & fishing | 2020 |
| Ladyview Kennels Limited | Agriculture & fishing | 2026 |
| Lahori Zaiqa Limited | Hospitality | 2024 |
| Laidrite Surfacing Co Limited | Construction | 1999 |
| Laikasa Ltd | Wholesale & retail | 2022 |
| Lake Croft Barns Limited | Hospitality | 2024 |
| Lakes Engineering Ltd | Professional & scientific | 2021 |
| Lakeside Cattery & Kennels Ltd | Other services | 2012 |
| Lakeside Driveways & Landscaping Ltd | Administrative & support | 2023 |
| Lakeview 7 Ltd | Real estate | 2021 |
| Lakewood Drive Property Management Co Ltd | Households | 1997 |
| Lakka Ltd | Professional & scientific | 2024 |
| LAL Developments Staffs Ltd | Construction | 2012 |
| Lala Property Investments Limited | Real estate | 2025 |
| Lala&Son Ltd | Transport & logistics | 2024 |
| Lambarda Ltd | Construction | 2004 |
| Lambert Spain Limited | Real estate | 2014 |
| Lambigo Healthcare Ltd | Health & social care | 2024 |
| Lambourne Plumbing and Heating Limited | Construction | 2014 |
| Lamedh Ltd | Hospitality | 2026 |
| Lancashire Biscuits Central Ltd | Manufacturing | 2015 |
| Lancashire Canal Cruises LLP | | 2017 |
| Lancer Developments Ltd | Real estate | 2020 |
| Land Navigation Systems Limited | Manufacturing | 1994 |
| Landmark Associates Limited | Professional & scientific | 1991 |
| Landpod Enterprises Ltd | Professional & scientific | 2019 |
| Landpod Limited | Construction | 2017 |
| Landskape Limited | Real estate | 2018 |
| Landstone Property Limited | Real estate | 2023 |
| Langdale Court Limited | Households | 2019 |
| Langley Construction Ltd | Construction | 2019 |
| Lann-Glayo Care Limited | Health & social care | 2019 |
| Lansdown Account Services Limited | Professional & scientific | 2026 |
| Lantern Fire and Security Limited | Administrative & support | 2012 |
| Laptop House Limited | Wholesale & retail | 2003 |
| LAR Locum Limited | Professional & scientific | 2016 |
| Larchgood Services Ltd | Other services | 2012 |
| Larh Holdings Ltd. | Professional & scientific | 2015 |
| Larkins Care Homes Limited | Health & social care | 2015 |
| Larrykay Ventures Ltd | Health & social care | 2021 |
| LAS Integral Ltd | Construction | 2018 |
| Lasax Limited | Hospitality | 2024 |
| Laser Investments (AJ) Ltd | Real estate | 2022 |
| Laser S.A. (AJ) Ltd | Real estate | 2022 |
| Lasting Bricks Ltd | Real estate | 2019 |
| Lateral Construction Ltd | Construction | 2022 |
| Lateral Edge Ltd | Information & communication | 2024 |
| Lathom Advisory Services Limited | Administrative & support | 2025 |
| Latifs Stoke Ltd | Hospitality | 2024 |
| Laughton Estate Management Services Ltd | Real estate | 2026 |
| Laughton Holdings Ltd | Construction | 2006 |
| Laughton Investments Ltd | Financial services | 2026 |
| Laura Sherratt Designs Ltd | Manufacturing | 2012 |
| Laurel People Ltd | Transport & logistics | 2026 |
| Lavanta Ltd | Hospitality | 2017 |
| Lavenderthaimassage Ltd | Health & social care | 2021 |
| Lavish Limousines Ltd | Extraterritorial | 2018 |
| Law Contractors Ltd | Construction | 2014 |
| Law Lettings Ltd | Real estate | 2025 |
| Law Property Ltd | Real estate | 2017 |
| Lawlor Design Ltd | Arts & recreation | 2026 |
| Lawn Stripes and Hedges Limited | Administrative & support | 2021 |
| Lawplug Limited | Information & communication | 2024 |
| Lawrence Davis Digital Limited | Professional & scientific | 2020 |
| Lawrence Vitello Properties Ltd | Real estate | 2024 |
| Lawson & Fern Limited | Financial services | 1982 |
| Lawsync Group Limited | Financial services | 2026 |
| Lawton Care Services Ltd | Health & social care | 2023 |
| Lawton Consultancy Ltd | Professional & scientific | 2026 |
| Lawton Hall Management Limited | Households | 2001 |
| Lawton Holdings Limited | Financial services | 2021 |
| Lawton Road Holdings Ltd | Construction | 2021 |
| Lawton Valley Kennels Ltd | Agriculture & fishing | 2015 |
| Layah Limited | Health & social care | 2024 |
| LB Civil Engineering Ltd | Construction | 2023 |
| LB Window Cleaning & Sons Ltd | Administrative & support | 2022 |
| Lbdd Properties Limited | Construction | 2022 |
| Lbdp Property Services Ltd | Real estate | 2025 |
| Lbsa Properties Ltd | Financial services | 2025 |
| LBT Consultancy Limited | Transport & logistics | 2018 |
| LC Property Negotiation Limited | Professional & scientific | 2026 |
| LC Staffstech Ltd | Wholesale & retail | 2025 |
| LC ZAN Ltd | Transport & logistics | 2021 |