| Kraken Capital Accounting Limited | Wholesale & retail | 2023 |
| Kreinik Ltd | Wholesale & retail | 2026 |
| Kris Cars Services Ltd | Wholesale & retail | 2015 |
| KRK Consultancy Ltd | Administrative & support | 2025 |
| Kumquat Limited | Construction | 2021 |
| Kuntrans Ltd | Transport & logistics | 2021 |
| Kyei & Aden Ltd | Wholesale & retail | 2024 |
| Kzqa Limited | Professional & scientific | 2026 |
| L F Nurseries Limited | Wholesale & retail | 2024 |
| L J J Electrical Services Limited | Construction | 2012 |
| L&H Family Ltd | Construction | 2022 |
| L&J Logs Ltd | Wholesale & retail | 2024 |
| L&R Realty Ltd | Real estate | 2024 |
| Labhelp Limited | Professional & scientific | 2010 |
| Laced by Twardz Ltd | Wholesale & retail | 2024 |
| Lakeview Court Management (Hamilton) Limited | Real estate | 2003 |
| Lambert Court Freehold Limited | Households | 2005 |
| Lambridge Limited | Professional & scientific | 2025 |
| Landfill Alternatives Limited | Water & waste | 2003 |
| Laserpoint Solutions Limited | Manufacturing | 1995 |
| Latchford Ltd | Administrative & support | 2024 |
| Latimo Brand Group Ltd | Manufacturing | 2026 |
| LAU Logistics Ltd | Transport & logistics | 2021 |
| Laura Cole Fabric Services Limited | Wholesale & retail | 2006 |
| Laurels Development Limited | Extraterritorial | 2025 |
| Lawrance's Bakery Limited | Manufacturing | 2008 |
| Layers Analytics Limited | Information & communication | 2026 |
| Layers Pilates Ltd | Arts & recreation | 2025 |
| LB Customs Solutions Ltd | Wholesale & retail | 2021 |
| LBL Southwest Limited | Professional & scientific | 2025 |
| LC Dream Enterprises Ltd | Wholesale & retail | 2025 |
| LCH Healthcare Limited | Wholesale & retail | 2024 |
| LDV Group Ltd | Wholesale & retail | 2016 |
| Lead Holdings Group Limited | Wholesale & retail | 2023 |
| Leadership for Healthcare Ltd | Professional & scientific | 2019 |
| Legal Title Ltd | Professional & scientific | 2024 |
| Legends Media Ltd | Information & communication | 2025 |
| Leggett & James Ltd | Real estate | 2006 |
| Lehel Design Limited | Professional & scientific | 2017 |
| Lenches Lakes Limited | Arts & recreation | 2003 |
| Lenches Self Storage Limited | Transport & logistics | 2020 |
| LES Bathroom Renovation Ltd | Construction | 2021 |
| Let's Talk Business Ltd | Other services | 2019 |
| Level Pegging Limited | Construction | 2018 |
| Leveret Moon Limited | Hospitality | 2021 |
| LF Roofing & Cladding Ltd | Construction | 2017 |
| Lgnd 82 Ltd | Wholesale & retail | 2020 |
| Libra One Limited | Professional & scientific | 2010 |
| Life Fork & Spoon Limited | Hospitality | 2007 |
| Lifestyle Support Care Ltd | Health & social care | 2025 |
| Lift UP Gym Ltd | Arts & recreation | 2017 |
| Ligo Trans Ltd | Transport & logistics | 2016 |
| Lilox Ltd | Wholesale & retail | 2026 |
| Limbkeepers UK Ltd | Wholesale & retail | 2021 |
| Limbrey Home Collection Ltd | Extraterritorial | 2020 |
| Limebridge Rural Services Limited | Administrative & support | 2004 |
| Linfoot Land and Property (Broom) Limited | Real estate | 2024 |
| Linfoot Land and Property (Harbury) Limited | Real estate | 2024 |
| Linfoot Land and Property Limited | Real estate | 2024 |
| Lionfisher Logistics Ltd | Financial services | 2025 |
| Lionfisher Ltd | Professional & scientific | 2023 |
| Lionrouge Foundation Limited | Professional & scientific | 2025 |
| Lisa Dean ( UK ) Limited | Hospitality | 2017 |
| Litteltune Orchard Limited | Households | 2020 |
| Little Big Learners Ltd | Health & social care | 2018 |
| Little Chalk Horse Limited | Wholesale & retail | 2022 |
| Littleton & Badsey Growers Limited | Professional & scientific | 2002 |
| Littleton Auctions Limited | Wholesale & retail | 2012 |
| Littleton Meadows Management Limited | Households | 2017 |
| Littleton Property Services Limited | Real estate | 2001 |
| Littleton Van Services Ltd | Transport & logistics | 2023 |
| Livaursof Limited | Transport & logistics | 2020 |
| LJB Coach Consultancy Limited | Administrative & support | 2018 |
| Llagutina Ltd | Health & social care | 2020 |
| Lockley Maple Close Residents Company Ltd | Households | 2020 |
| Locktown Windows & Doors Limited | Construction | 2007 |
| Locomotive 5542 Limited | Transport & logistics | 1981 |
| Lokeol Ltd | Arts & recreation | 2016 |
| Lollycat Limited | Financial services | 2025 |
| Longfurrow Farm (Evesham) Ltd | Agriculture & fishing | 2012 |
| Longsword Security Management Limited | Administrative & support | 2026 |
| Loombay Limited | Manufacturing | 2025 |
| Loomi Distilleries Limited | Manufacturing | 2025 |
| Lootbug Limited | Wholesale & retail | 2018 |
| Loqex Limited | Information & communication | 2021 |
| Lords Automotive Ltd | Wholesale & retail | 2023 |
| Lovalux Limited | Administrative & support | 2021 |
| Loveitts Limited | Real estate | 2011 |
| Loveitts Longlease Limited | Real estate | 2015 |
| Lowe House Collective Ltd | Professional & scientific | 2025 |
| LPL Equestrian Limited | Agriculture & fishing | 2020 |
| LPS Holdings Limited | Real estate | 2016 |
| LQY Ltd | Hospitality | 2025 |
| LS Home Improvement Limited | Construction | 2018 |
| Luca&Sofia Logistics Ltd | Transport & logistics | 2021 |
| Lucky Bridge Ltd | Hospitality | 2024 |
| Ludlow Chippy Limited | Hospitality | 2024 |
| Luleaconstantin Trans Ltd | Transport & logistics | 2015 |
| Lumawell Limited | Construction | 2025 |
| Lumiere Kinesis Limited | Professional & scientific | 2009 |