| Kjknight Marketing Ltd | Professional & scientific | 2025 |
| Kjrh Limited | Real estate | 2022 |
| KJW International Ltd | Other services | 2023 |
| KK Auto & Decor Ltd | Construction | 2026 |
| KMF Accountancy Ltd. | Financial services | 2019 |
| Kmrg Management Ltd | Professional & scientific | 2018 |
| KMW Property Management Ltd | Real estate | 2023 |
| Knights of Middle England Limited | Arts & recreation | 2008 |
| Koelman Groundworks & Landscaping Limited | Construction | 2017 |
| Kome Entertainment Limited | Arts & recreation | 2011 |
| Kopanski Catering Limited | Hospitality | 2023 |
| Kperformance Limited | Professional & scientific | 2015 |
| KPM Property Sourcing Ltd | Administrative & support | 2024 |
| Kristina Theodoris Ltd | Arts & recreation | 2019 |
| Krutharth Solutions Limited | Information & communication | 2016 |
| KS Occupational Therapy Services Limited | Health & social care | 2026 |
| KSW Developments Warwickshire Ltd | Construction | 2020 |
| Kuel Solutions Limited | Information & communication | 2026 |
| Kura Airline Resourcing Ltd | Administrative & support | 2021 |
| Kyusai Media Ltd | Information & communication | 2026 |
| L & K Holland Properties Limited | Professional & scientific | 2013 |
| L G Welding Limited | Manufacturing | 2004 |
| L J Marketing Ltd | Professional & scientific | 2025 |
| L&A Group Holdings Limited | Financial services | 2026 |
| L&S Dental Limited | Health & social care | 2021 |
| L.P.C. Bakery Limited | Manufacturing | 2016 |
| LA Beautiful Limited | Health & social care | 2012 |
| LA Quinta Title Company Limited | Real estate | 2004 |
| Ladper Limited | Hospitality | 2024 |
| Lagoon Development Company Limited | Other services | 2004 |
| Lagoon Properties Limited | Other services | 2004 |
| Land Pieces Ltd | Households | 2021 |
| Land Site Plot Ltd | Construction | 2025 |
| Lane Mcmahon Limited | Professional & scientific | 2010 |
| Langman and Associates Limited | Health & social care | 2010 |
| Lansdowne-House Consulting Limited | Professional & scientific | 2021 |
| Larkhall Coridon Limited | Real estate | 2006 |
| Larkin Research Limited | Information & communication | 2026 |
| Larus Aviation Limited | Public administration | 2013 |
| LAS Mimosas Title Company Limited | Real estate | 2004 |
| Laughing Dog Properties Limited | Real estate | 2021 |
| Laundry Greenhill Ltd | Administrative & support | 2025 |
| Laundry Quarter Ltd | Other services | 2015 |
| Laura Williams (Achieve Your Potential) Ltd | Health & social care | 2015 |
| Laurentienne Ltd | Real estate | 2017 |
| Lawns and Gardens Limited | Administrative & support | 2007 |
| Lawrences Jewellers Limited | Wholesale & retail | 2009 |
| Layer Eight Consultants Limited | Information & communication | 2022 |
| Lazy Ltd | Arts & recreation | 2013 |
| LB25 Ltd | Real estate | 2025 |
| LBW Building Services Limited | Construction | 2021 |
| Leadar Limited | Financial services | 2017 |
| Leamington Hobby Centre Limited | Other services | 1997 |
| Ledridge Lighting Ltd | Manufacturing | 2011 |
| Legends Global Limited | Other services | 2025 |
| Lehuilong Limited | Real estate | 2022 |
| Lens Loop Limited | Financial services | 2025 |
| Levante Properties Limited | Financial services | 2017 |
| LEVEL38 Limited | Financial services | 2017 |
| Lewis E Clark Fencing Ltd | Other services | 2024 |
| Lewis Equipment Limited | Manufacturing | 1979 |
| Leys Farm Livery Limited | Agriculture & fishing | 2020 |
| LGC Installations Limited | Construction | 2024 |
| Liamol Ltd | Professional & scientific | 2005 |
| Lian Estates Ltd | Real estate | 2023 |
| Lickworx Holdings Ltd | Information & communication | 2021 |
| Lickworx Limited | Information & communication | 2010 |
| Lidstore Limited | Real estate | 1991 |
| Life Upgraded Ltd | Wholesale & retail | 2024 |
| Lifehack Limited | Extraterritorial | 2018 |
| Lifespace Trust | Health & social care | 2007 |
| Lifestyle Future Limited | Financial services | 2002 |
| Lifted Lashes Ltd | Other services | 2024 |
| Like Regular Chickens Limited | Wholesale & retail | 2013 |
| Limar Construction Ltd | Construction | 2021 |
| Linden Therapy Ltd | Health & social care | 2008 |
| Lintegral Ltd | Professional & scientific | 2022 |
| Liquidityedge Ltd | Financial services | 2024 |
| Liqyd Ltd | Wholesale & retail | 2017 |
| Lisons Brothers Limited | Hospitality | 2014 |
| Listers Group Limited | Wholesale & retail | 1978 |
| Listers Hull Limited | Wholesale & retail | 2007 |
| Little BEE Travelling Limited | Administrative & support | 2025 |
| Little Campden House Limited | Hospitality | 2023 |
| Little Play Tribe Ltd | Wholesale & retail | 2020 |
| Little Tent Limited | Professional & scientific | 2018 |
| Live Injection Limited | Real estate | 2020 |
| Livener Ltd | Information & communication | 2020 |
| Living Space Design Landscapes Limited | Administrative & support | 2006 |
| LIZ Harper Travel Limited | Other services | 2018 |
| Lizwill Limited | Construction | 2022 |
| LJ Music Management Ltd | Arts & recreation | 2020 |
| LJP Language Services Limited | Professional & scientific | 2010 |
| Lmrt Ltd | Education | 2026 |
| Lockdown Media Limited | Information & communication | 2002 |
| Lockington Property Ltd | Real estate | 2022 |
| Lodders Trust Corporation Limited | Professional & scientific | 2022 |
| Lodge Court Management (Stratford-Upon-Avon) Limited | Real estate | 2007 |
| Logic PL Ltd | Professional & scientific | 2018 |
| Logistic Projects Ltd | Other services | 2013 |