| K Cycles Limited | Wholesale & retail | 2005 |
| K E Inspections Limited | Construction | 2017 |
| K G Aspinall Ltd | Real estate | 2017 |
| K I R Wirral West Ltd | Hospitality | 2019 |
| K Riley Entertainments Limited | Hospitality | 2019 |
| K&D Property Maintenance Limited | Real estate | 2024 |
| K&E Apartments Ltd | Real estate | 2022 |
| K&G Property Group Ltd | Real estate | 2025 |
| K&J Hair Studio Ltd | Other services | 2023 |
| K&R Food and Bar Ltd | Hospitality | 2020 |
| K. & S. Rourke Photo Imaging Limited | Manufacturing | 1999 |
| K.J. Coates Limited | Real estate | 1976 |
| K.J. Mock Limited | Construction | 1996 |
| K.Wade Construction Company Ltd | Construction | 2025 |
| K4YLAT Limited | Health & social care | 2023 |
| K8 Property & Maintenance Ltd | Construction | 2024 |
| Kado Fitness Ltd | Arts & recreation | 2022 |
| Kaede Management Holdings Limited | Administrative & support | 2018 |
| Kaede Management Limited | Administrative & support | 2001 |
| Kagr Quantity Surveying Limited | Professional & scientific | 2023 |
| Kalduir Consultancy Limited | Administrative & support | 2023 |
| Kaleidoscope Horizons Ltd | Education | 2024 |
| Kaleidoscope MX Ltd | Information & communication | 2025 |
| KAM Childrens Speech and Language Therapy Limited | Health & social care | 2012 |
| Kamala Hills Digital Services Ltd | Professional & scientific | 2020 |
| Kameraderie Limited | Information & communication | 2019 |
| Kammy Rasul Ltd | Real estate | 2024 |
| Kamranonline Ltd | Information & communication | 2022 |
| Kanada Integrity Management Ltd | Professional & scientific | 2023 |
| Kantech Engineering Solutions Ltd | Manufacturing | 2021 |
| Kapeloi Ltd | Wholesale & retail | 2024 |
| Karen Davies Sugarcraft Limited | Manufacturing | 2008 |
| Karenfontcoachingandhypnotherapy Ltd | Health & social care | 2025 |
| Karl Ormond Plastering Limited | Construction | 2017 |
| Karl Tatler Estate Agents Limited | Real estate | 2000 |
| Kasael Ltd | Professional & scientific | 2015 |
| Kaskas Heswall Ltd | Hospitality | 2025 |
| Katalyst Creative Limited | Information & communication | 2014 |
| Kate Ferrie Consulting Ltd | Professional & scientific | 2023 |
| Kate Knox Agencies Ltd | Wholesale & retail | 2021 |
| Kate Prowse Ltd | Professional & scientific | 2026 |
| Katharos Bakery Limited | Real estate | 1981 |
| Kathir and Sons Limited | Wholesale & retail | 2002 |
| Katie Dugdale Limited | Information & communication | 2018 |
| Katslan Ltd | Other services | 2015 |
| Kattashis Estates Limited | Construction | 1968 |
| KAV Taverns (Rake) Ltd | Hospitality | 2025 |
| Kaya Project Consultancy Limited | Professional & scientific | 2022 |
| Kayla's Closet Ltd | Wholesale & retail | 2021 |
| Kay’S Travel Ltd | Administrative & support | 2018 |
| KBJ Properties Ltd | Real estate | 2024 |
| KBL Sports Limited | Professional & scientific | 2011 |
| KBR Creative Limited | Information & communication | 2022 |
| KC Access Services Ltd | Administrative & support | 2025 |
| KC International Enterprises Limited | Wholesale & retail | 2026 |
| KCS Dentistry Limited | Administrative & support | 2017 |
| Kcts Limited | Professional & scientific | 2007 |
| KD Property Improvement Limited | Households | 2025 |
| KD Surveying Ltd | Professional & scientific | 2026 |
| KEA Lettings Ltd | Real estate | 2024 |
| Keeko Kids Ltd | Information & communication | 1997 |
| Keenan and Morris Property Investment Limited | Real estate | 2023 |
| Keep IT Cheap - Car Rentals Limited | Wholesale & retail | 2009 |
| Keep IT Real Estates Limited | Real estate | 1999 |
| Keith Arnold Swim Schools Ltd | Arts & recreation | 2012 |
| Kel-E Projects Ltd. | Education | 2019 |
| Kelher Wholesale Limited | Wholesale & retail | 2026 |
| Kelvin Service Station Ltd | Wholesale & retail | 2018 |
| KEN Rourke Imaging Limited | Extraterritorial | 1997 |
| Kendallpharma Ltd | Professional & scientific | 2021 |
| Kenley Property Developments Limited | Construction | 2001 |
| Kennedy Consultants Wirral Ltd | Professional & scientific | 2017 |
| Kenportland Limited | Extraterritorial | 2008 |
| Kentmere HR Solutions Ltd | Professional & scientific | 2021 |
| Kenwright Accountants Ltd | Professional & scientific | 2015 |
| Kenwright Properties Limited | Real estate | 2023 |
| Kenyon Terrace Management Company Limited | Hospitality | 2004 |
| Kerem Mert 19 Ltd | Hospitality | 2019 |
| Kernowek IT Ltd | Information & communication | 2024 |
| Kerry's Studio Limited | Professional & scientific | 2024 |
| Kershaw Group Properties Limited | Real estate | 2020 |
| Kess Limited | Construction | 2013 |
| Kestrel Building and Maintenance Limited | Construction | 2020 |
| Kestwill Holdings Limited | Professional & scientific | 2020 |
| Kevin Lomax Funerals Ltd | Other services | 2016 |
| KEW Land Ltd | Extraterritorial | 2013 |
| Key Residential Limited | Real estate | 2008 |
| Key Sports Supplements Limited | Wholesale & retail | 2009 |
| Keyhole Investments Limited | Professional & scientific | 2005 |
| Keylex Limited | Manufacturing | 1984 |
| Keyrock Group Limited | Financial services | 2022 |
| Keystone Energy Solutions Ltd | Professional & scientific | 2022 |
| Keystone Service Charge Management Limited | Households | 2025 |
| Keyway Solutions Limited | Wholesale & retail | 2003 |
| KFA Services Limited | Health & social care | 2024 |
| KG (NW) Ltd | Hospitality | 2025 |
| KH2 Community Link Services C.I.C. | Health & social care | 2013 |
| Khajuria Limited | Hospitality | 2025 |
| Khalla & Co Ltd | Wholesale & retail | 2026 |
| Khemeia Labs Ltd | Information & communication | 2024 |