| Juxon Wealth Limited | Financial services | 2017 |
| JVR Realty Ltd | Real estate | 2026 |
| JW Nutrition Limited | Professional & scientific | 2019 |
| JWH Solutions North West Limited | Wholesale & retail | 2023 |
| JWL Lifestyle Limited | Arts & recreation | 2018 |
| JWM NW Ltd | Professional & scientific | 2024 |
| K & N Grocery Limited | Wholesale & retail | 2008 |
| K B GAS & Heating Services Limited | Construction | 2020 |
| K J S Fabrications Ltd | Construction | 2024 |
| K L R Trading PVT Ltd | Wholesale & retail | 2024 |
| K&S Property (N/W) Limited | Real estate | 2015 |
| K2 Trade Windows & Doors Ltd. | Manufacturing | 2011 |
| Kada Inc Ltd | Real estate | 2010 |
| Kada Inc Properties Ltd | Real estate | 2025 |
| Kaizen Mind Care Ltd | Education | 2026 |
| Kaizen Wirral Mindset CIC | Health & social care | 2022 |
| Kalmont Ltd | Real estate | 2025 |
| KAM Enterprises Limited | Hospitality | 2013 |
| Kamex Ltd | Arts & recreation | 2016 |
| Karl Lasnier Autos Ltd | Wholesale & retail | 2022 |
| Kavithasan Ltd | Administrative & support | 2023 |
| KAZ Swift Cleaning Service Limited | Administrative & support | 2025 |
| KB Properties North West Ltd | Real estate | 2019 |
| KBS Skills Academy CIC | Education | 2025 |
| KC Car Sales Surrey Limited | Wholesale & retail | 2014 |
| Kcp(Nw) Limited | Manufacturing | 2023 |
| Keenchoice Limited | | 1973 |
| Keepbond Limited | Education | 1984 |
| Kefirek Sklip Limited | Wholesale & retail | 2019 |
| Kelcrest Developments Limited | Construction | 2007 |
| Kenella Signs Ltd | Manufacturing | 2024 |
| Kenna & Turner Limited | Other services | 2014 |
| KER Consulting Limited | Financial services | 2014 |
| Kerala House (NW) Ltd | Hospitality | 2025 |
| Kerrigans Construction Lawyers Ltd | Professional & scientific | 2019 |
| Kerrys Wreaths Limited | Wholesale & retail | 2025 |
| Key Properties (NW) Limited | Real estate | 2018 |
| Keyconsult-Services Ltd | Information & communication | 2023 |
| KGA (UK) Ltd | Professional & scientific | 2012 |
| KGA UK Holdings Ltd | Financial services | 2024 |
| KGO Investments Ltd | Real estate | 2021 |
| KHC Education Services Ltd | Education | 2024 |
| Kingsmead Estates Limited | Real estate | 2022 |
| Kingston Shaw Ltd | Other services | 2003 |
| Kingston Shaw Residential Limited | Real estate | 2011 |
| Kinsman Katering Limited | Hospitality | 2014 |
| Kitegrove Limited | Professional & scientific | 1992 |
| KJP Architecture Limited | Professional & scientific | 2014 |
| KJP Law Limited | Professional & scientific | 2008 |
| KKJ ALI Ltd | Hospitality | 2025 |
| Klas Financial Consultants Ltd | Administrative & support | 2026 |
| KM Chalmers Ltd | Administrative & support | 2011 |
| KM Taverns Limited | Hospitality | 2024 |
| KN Real Estate 215 Ltd | Wholesale & retail | 2023 |
| Knockout Services Ltd | Wholesale & retail | 2023 |
| Knowledge Powered Solutions Ltd | Information & communication | 1994 |
| Knowsley Community Taxis Ltd | Transport & logistics | 2022 |
| Koala North West Ltd | Health & social care | 2010 |
| Koidivision Limited | Wholesale & retail | 2021 |
| Kpff Limited | Manufacturing | 2011 |
| Kpsol Limited | Financial services | 2017 |
| KPT (Bebington) Ltd | Wholesale & retail | 2022 |
| KR Couriers & Transport Ltd | Transport & logistics | 2021 |
| Krct Ltd | Transport & logistics | 2023 |
| KRD Access Ltd | Manufacturing | 2026 |
| Kride Limited | Transport & logistics | 2025 |
| KRW Inspection Ltd | Professional & scientific | 2026 |
| Krypto Ltd | Information & communication | 2024 |
| KS Business Solutions (North West) Ltd | Administrative & support | 2014 |
| KSL Property Investments Group Ltd | Real estate | 2023 |
| KTC Technical Services Ltd | Professional & scientific | 2020 |
| KTL Home Tutoring Ltd | Education | 2018 |
| Kurdish CUT Wirral Ltd | Other services | 2024 |
| Kvtt Limited | Wholesale & retail | 2025 |
| Kwikshift European Transportation & Logistics Ltd | Transport & logistics | 2016 |
| Kwikshift Removals Ltd | Transport & logistics | 2014 |
| Kwikshift Storage (B&S) Limited | Transport & logistics | 2016 |
| Kwikshift Storage (Cleveland) Limited | Administrative & support | 2017 |
| Kyle Lemke Auto Repairs Ltd | Wholesale & retail | 2023 |
| L & K Fuels Limited | Information & communication | 2006 |
| L & L Sports Limited | Arts & recreation | 2020 |
| L Genies Ltd | Professional & scientific | 2017 |
| L J Properties (NW) Ltd | Construction | 2022 |
| L K @ Iconic Limited | Other services | 2023 |
| L W Mechanical and GAS Services Ltd | Construction | 2025 |
| L&Z Ltd | Wholesale & retail | 2025 |
| L. Hanks & SON Limited | Wholesale & retail | 1965 |
| L.A.P. Accounts Ltd | Professional & scientific | 2021 |
| L.W. Fabrications Company Ltd | Other services | 2020 |
| L1 Hanover Stay Limited | Real estate | 2026 |
| LA Family Group Ltd | Hospitality | 2024 |
| LA Rosada Polo Breeding Limited | Agriculture & fishing | 2023 |
| LA Rosada Polo Team Limited | Arts & recreation | 2010 |
| LAC Management and Consulting Limited | Professional & scientific | 2014 |
| Lace & Letters Ltd | Wholesale & retail | 2025 |
| Laird Street Mini Market Limited | Wholesale & retail | 2025 |
| Laird Street Sweet Shop Ltd | Wholesale & retail | 2025 |
| Laird Superstore Ltd | Wholesale & retail | 2018 |
| Lakshmi Living Ltd | Wholesale & retail | 2024 |
| LAM & Dalby Trading Limited | Wholesale & retail | 2024 |