| JZW 88 Limited | Hospitality | 2026 |
| K & M Building Services Ltd | Construction | 2026 |
| K B Trans Limited | Construction | 2013 |
| K Davies Ltd | Professional & scientific | 2022 |
| K E Coach Travel Ltd | Transport & logistics | 2024 |
| K H Craft Limited | Wholesale & retail | 2024 |
| K LEE Runcorn Ltd | Hospitality | 2020 |
| K Smith Travel Ltd | Transport & logistics | 2025 |
| K Wainwright Ltd | Professional & scientific | 2018 |
| K&M Leisure (1997) Ltd. | Wholesale & retail | 2014 |
| K-Mac Capital Ltd | Real estate | 2018 |
| K.D.E. Limited | Manufacturing | 2003 |
| Karen Turner Consultancy Ltd | Professional & scientific | 2026 |
| Kargar Rope Access Limited | Construction | 2017 |
| Karwaan Ltd | Professional & scientific | 2021 |
| Kash Bars Limited | Hospitality | 2011 |
| Katie’S Independent Support Services Ltd | Administrative & support | 2018 |
| Kay's Properties and Lets Ltd | Real estate | 2025 |
| Kayos Consulting Services Limited | Administrative & support | 2017 |
| KC Landscapes Limited | Administrative & support | 2024 |
| KDE Holdings Limited | Professional & scientific | 2016 |
| Kearneys Electrical Services Ltd | Professional & scientific | 2025 |
| Kenay Ltd | Manufacturing | 1999 |
| Keogh Cross Couriers Ltd | Transport & logistics | 2023 |
| Kerling Newco 1 Limited | Professional & scientific | 2015 |
| Kerling Newco 2 Limited | Professional & scientific | 2015 |
| Kestrels Contractors Ltd | Construction | 2025 |
| Keuper GAS Storage Limited | Manufacturing | 2014 |
| Key West Supply and Trading Limited | Professional & scientific | 2014 |
| Keybox Properties Limited | Real estate | 2025 |
| Keyhawk Properties Ltd | Construction | 2025 |
| Khtelecoms Limited | Construction | 2022 |
| Kids Activity World Ltd | Education | 2017 |
| Kids Club Group Limited | Other services | 2017 |
| Kidzillatoys Ltd | Wholesale & retail | 2023 |
| Kiing Barber Runcorn Ltd | Other services | 2023 |
| Kings Meadow Holdings Ltd | Real estate | 2019 |
| Kirsty Illidge Ltd | Professional & scientific | 2026 |
| KIT and Wild Ltd | Wholesale & retail | 2025 |
| Kitchen and Bedroom Interiors Limited | Construction | 2011 |
| Kiwi Smart Solutions Ltd. | Information & communication | 2017 |
| KJB Consulting (Healthcare) Ltd | Professional & scientific | 2019 |
| KJM Ltd | Other services | 2021 |
| KK Food & Wine Ltd. | Wholesale & retail | 2013 |
| KKC PA Support and Cleaning Solutions Ltd | Administrative & support | 2024 |
| Klsl Properties Ltd | Real estate | 2020 |
| KM Transport Limited | Transport & logistics | 2013 |
| Kmak Trans Ltd | Transport & logistics | 2024 |
| KMS (Europe) Ltd | Wholesale & retail | 2003 |
| KMZ Chemicals Limited | Wholesale & retail | 1982 |
| Knitwire Limited | Manufacturing | 2003 |
| Knowtech IT Limited | Administrative & support | 2015 |
| Kofie Transport Ltd | Transport & logistics | 2025 |
| Kokutai Ltd | Arts & recreation | 2023 |
| Koteck Ltd | Manufacturing | 2025 |
| KOV Enterprise Ltd | Wholesale & retail | 2024 |
| Kozupa Transport Ltd | Transport & logistics | 2013 |
| KP Project Management Limited | Professional & scientific | 2017 |
| KP Thomas Ltd | Transport & logistics | 2025 |
| KPS Selection Ltd | Administrative & support | 2021 |
| KR North West Builders Limited | Construction | 2023 |
| Kris Nolan Haulage Ltd | Transport & logistics | 2026 |
| KRK Leak Detection Ltd | Financial services | 2024 |
| Krzysztof Osinski Transport Ltd. | Transport & logistics | 2015 |
| KSL Investments Limited | Professional & scientific | 2013 |
| Ktech Technology Ltd | Other services | 2025 |
| KW Piping Ltd | Extraterritorial | 2016 |
| KZR Edge Limited | Real estate | 2025 |
| L Conchie Limited | Construction | 2014 |
| L P Air Conditioning Ltd | Energy | 2018 |
| L&A Asset Group Limited | Real estate | 2026 |
| L&D Motors Ltd | Wholesale & retail | 2013 |
| L&M Surveying Associates Ltd | Professional & scientific | 2018 |
| L&N Clarendon Ltd | Hospitality | 2022 |
| L.& J.Whittaker Limited | Wholesale & retail | 1956 |
| L.F.BRIGGS(1932)LIMITED | Transport & logistics | 1932 |
| L.Rowland & Company (Retail) Limited | Wholesale & retail | 1988 |
| L715STUDIO Ltd | Information & communication | 2026 |
| L7AI Solutions Ltd | Information & communication | 2025 |
| LA ROK Limited | Construction | 2014 |
| Labmotive Ltd | Information & communication | 2006 |
| Lacl Properties Ltd | Real estate | 2026 |
| Laeni Limited | Administrative & support | 2024 |
| Land of Beds Limited | Extraterritorial | 2010 |
| Landl Property Development Ltd | Construction | 2021 |
| Landl Property Group Ltd | Real estate | 2019 |
| Lanes Logistics Limited | Transport & logistics | 2013 |
| Langdale Express Ltd | Other services | 2026 |
| Laser Schoolwear Runcorn Ltd | Wholesale & retail | 2025 |
| Last City Studios Ltd | Information & communication | 2026 |
| Launch Express Ltd | Professional & scientific | 2015 |
| Lavender Moon Maher Ltd | Health & social care | 2025 |
| Lawnsavers Limited | Other services | 2022 |
| Lawnsavers North Ltd | Other services | 2023 |
| Lawson Process Solutions Limited | Professional & scientific | 2013 |
| Lawyers in Local Government | Other services | 2013 |
| Lball Ltd | Construction | 2024 |
| Lbbathrooms Ltd | Wholesale & retail | 2025 |
| LBS Systems Limited | Administrative & support | 2008 |
| LCC Technologies Limited | Professional & scientific | 2025 |