| Just Show UP Limited | Arts & recreation | 2019 |
| JYS 168 Ltd | Hospitality | 2023 |
| K & S Builders (Huyton) Ltd | Construction | 2017 |
| K N J Solutions Ltd | Construction | 2019 |
| K.G.B. and M.E. (Plant Hire & Demolition Contractors) Limited | Construction | 1981 |
| K20 Plumbing Services Limited | Construction | 2022 |
| Kai-Manzar Limited | Professional & scientific | 2019 |
| Karanda Solutions Limited | Information & communication | 2002 |
| Karma Records Limited | Information & communication | 2019 |
| Katie Bowater Ltd | Real estate | 2022 |
| Katie Fearns Permanent Makeup Ltd | Other services | 2022 |
| Kaul Industries Ltd | Professional & scientific | 2022 |
| Kavien's Ltd | Wholesale & retail | 2019 |
| Kavitha Retail Ltd | Wholesale & retail | 2018 |
| Kawela Limited | Professional & scientific | 2026 |
| KD Deals Ltd | Wholesale & retail | 2025 |
| KDL Transport Limited | Transport & logistics | 2011 |
| KEN SB Limited | Hospitality | 2024 |
| Kensie Estates Limited | Real estate | 2024 |
| Kensington Hawthorne Ltd | Real estate | 2025 |
| Keywright Properties Ltd | Real estate | 2025 |
| KH Projects (Maintenance) Ltd | Construction | 2015 |
| Kibbocorp Ltd | Health & social care | 2018 |
| KIC Multimedia Limited | Information & communication | 2009 |
| Kick for a Cause Ltd | Arts & recreation | 2025 |
| Kingsley Chunks Ltd | Arts & recreation | 2026 |
| Klassik Builders & Shopfitters Ltd | Construction | 2022 |
| KLR Aesthetics Academy Ltd | Education | 2022 |
| KLR Aesthetics Ltd | Health & social care | 2018 |
| KM Accounting Solutions Ltd | Professional & scientific | 2007 |
| KMS Comms Limited | Information & communication | 2019 |
| KMS Communications Limited | Information & communication | 2024 |
| Knight Development Group Ltd | Real estate | 2024 |
| Knowsley Nice Food Ltd | Hospitality | 2022 |
| Knowsley Tyres Ltd | Wholesale & retail | 2025 |
| Knowsley Windows Ltd | Construction | 2006 |
| Koikkara Limited | Transport & logistics | 2023 |
| KTD Electrical Services Limited | Construction | 1997 |
| KU 12 Limited | Construction | 2017 |
| Kubera MB Ltd | Real estate | 2025 |
| Kwik Express Limited Limited | Wholesale & retail | 2025 |
| L & J Property Investement Limited | Real estate | 2024 |
| L & P Medi Limited | Health & social care | 2021 |
| L G Bullen Plumbing & Heating Ltd | Construction | 2023 |
| L G Bullen Refrigeration & Air Conditioning Ltd | Construction | 2025 |
| L P Residential Services Limited | Households | 2004 |
| L&E Residential Property Ltd | Real estate | 2026 |
| L&P Estates (North West) Limited | Real estate | 2020 |
| L&P Taxi Services Ltd | Transport & logistics | 2024 |
| L&W 328 Limited | Hospitality | 2026 |
| L1 Styles Prescot Ltd | Other services | 2023 |
| L35 Driving School Ltd | Education | 2025 |
| LA Tabella Ltd | Hospitality | 2019 |
| Labwork Ltd | Professional & scientific | 2017 |
| Lacquerlux Ltd | Manufacturing | 2025 |
| Lady Margaret Bowling Club Limited | Arts & recreation | 1893 |
| Ladybird Care Ltd | Health & social care | 2025 |
| Lancashire Crop Consultancy Limited | Agriculture & fishing | 2011 |
| Lane Britton and Jenkins Limited | Construction | 2015 |
| Last PUB in Whiston Ltd | Hospitality | 2025 |
| Last Stop Homes Ltd | Health & social care | 2024 |
| Laura Jane Grace Limited | Public administration | 2025 |
| Lauren House Management Co Ltd. | Households | 2004 |
| Lavit Ltd | Wholesale & retail | 2013 |
| Learning Matrix Ltd | Education | 2025 |
| LEE Sambor Plumbing and Heating Ltd | Construction | 2018 |
| Legacy Living Group Ltd | Real estate | 2025 |
| Leix Property Ltd | Real estate | 2025 |
| LEK Lubrication Engineering Limited | Manufacturing | 2016 |
| Leocor Developments Ltd | Professional & scientific | 2016 |
| LES Norton Limited | Professional & scientific | 2017 |
| Level Services Ltd | Construction | 2026 |
| Leviathan Property Group Ltd | Real estate | 2026 |
| Leyca Mechanical Services Ltd | Professional & scientific | 2016 |
| LFC Reds Ltd | Information & communication | 2011 |
| Lhbl Limited | Health & social care | 2025 |
| Libella Contract Furnishings Limited | Manufacturing | 2015 |
| Lifetime Education & Training Ltd | Education | 2023 |
| Lightening the Way Counselling Ltd | Health & social care | 2022 |
| Lightning Payroll Limited | Administrative & support | 2026 |
| Limitless Joinery Services Limited | Construction | 2026 |
| Line Dance Foundation | Other services | 2014 |
| Linegate Consulting Ltd | Professional & scientific | 2016 |
| Little Cedars Montessori Ltd | Education | 2018 |
| Little Journeys Baby Co Limited | Wholesale & retail | 2023 |
| Littlemead Holdings Limited | Financial services | 2021 |
| Liver Building and Garden Supplies Limited | Administrative & support | 2001 |
| Liverpool Civils Limited | Construction | 2020 |
| Liverpool Dreams Ltd | Hospitality | 2024 |
| Liverpool Express Ltd | Information & communication | 2025 |
| Liverpool Landscapes Ltd | Administrative & support | 2019 |
| Liverpool Spice Ltd | Hospitality | 2025 |
| Liverpool Window Repairs Limited | Construction | 2019 |
| Living Seed (Europe) | Other services | 2011 |
| Livv Homes Limited | Administrative & support | 2004 |
| Livv Maintenance Limited | Administrative & support | 2009 |
| Liyanaandco Ltd | Wholesale & retail | 2023 |
| LJ Living Ltd | Real estate | 2024 |
| LJD Holdings Limited | Transport & logistics | 2024 |
| LJH Travel Limited | Administrative & support | 2020 |