| Kinics Capital Limited | Information & communication | 2025 |
| Kinlan Brickwork Ltd | Construction | 2012 |
| Kinlan Developments Ltd | Construction | 2020 |
| Kinlan Scaffolding Ltd | Manufacturing | 2022 |
| Kinley Business Solutions Limited | Professional & scientific | 2025 |
| KINNERTON20 Ltd | Extraterritorial | 2004 |
| Kinney Kars Limited | Wholesale & retail | 2025 |
| Kinsale Ltd | Construction | 2017 |
| Kinsella Base Developments Ltd | Real estate | 2026 |
| Kinsella Painting Contractors Limited | Construction | 2020 |
| Kinship Carers | Health & social care | 2006 |
| Kiosk Coffee Limited | Hospitality | 2020 |
| KIP Candle Co Limited | Wholesale & retail | 2022 |
| Kirby Tyres Ltd | Wholesale & retail | 2025 |
| Kirby Village News Ltd | Wholesale & retail | 2020 |
| Kirk Originals Eyewear Ltd | Manufacturing | 2023 |
| Kirkby Amateur Boxing Club Limited | Arts & recreation | 2010 |
| Kirkby Black Taxis Ltd | Transport & logistics | 2025 |
| Kirkby Blinds Group Ltd | Manufacturing | 2024 |
| Kirkby Discount Store Limited | Wholesale & retail | 2025 |
| Kirkby K9 Pet Supplies Ltd | Other services | 2020 |
| Kirkby Liver Electric Company Limited | Wholesale & retail | 1980 |
| Kirkby Market Place Limited | Hospitality | 2022 |
| Kirkby MOT & Service Centre Limited | Wholesale & retail | 2025 |
| Kirkby One Food Limited | Hospitality | 2019 |
| Kirkby Phones and Vapes Ltd | Wholesale & retail | 2025 |
| Kirkby School Wear Limited | Wholesale & retail | 2022 |
| Kirkby Signs Limited | Manufacturing | 2014 |
| Kirkby Skips Limited | Water & waste | 2000 |
| Kirkby Town JFC CIC | Education | 2023 |
| Kirkby Valeting Centre Ltd | Administrative & support | 2023 |
| Kirkby(Tyres)Limited | Wholesale & retail | 1958 |
| Kirkbykrafts Limited | Wholesale & retail | 2021 |
| Kirkdale Neighbourhood Community | Health & social care | 1999 |
| Kirkdale Properties Limited | Real estate | 2007 |
| Kirkdalepropertyservicesltd Ltd | Construction | 2026 |
| Kirkdaletyres Ltd | Wholesale & retail | 2025 |
| Kirkham Financial Planning Ltd | Financial services | 2023 |
| Kirkhill Associates Ltd | Administrative & support | 2008 |
| Kirkland Property Group Ltd | Real estate | 2025 |
| Kirklees Trampoline Gymnastics Academy Ltd | Arts & recreation | 2025 |
| Kirkstone Convenience Ltd | Wholesale & retail | 2021 |
| Kirkstone Gardens Limited | Real estate | 2021 |
| Kirsty Craig Associates Ltd | Other services | 2003 |
| Kirsty Doyle Weddings Ltd | Wholesale & retail | 2024 |
| Kirsty Eyres Consultancy Ltd | Health & social care | 2025 |
| Kishkinda L7 Ltd | Hospitality | 2025 |
| Kiskeya Limited | Wholesale & retail | 2023 |
| KIT NW Borough Limited | Real estate | 2024 |
| KIT NW Holdings Limited | Financial services | 2024 |
| KIT NW Limited | Real estate | 2023 |
| KIT Shed Group Ltd | Wholesale & retail | 2023 |
| Kitch Legal Holdings Limited | Administrative & support | 2014 |
| Kitchen & Taps Co Ltd | Hospitality | 2022 |
| Kitchen 62 Ltd. | Hospitality | 2016 |
| Kitchen Cleaning Facilities Management Ltd | Administrative & support | 2017 |
| Kitchen Door Swap UK Ltd | Construction | 2026 |
| Kitchen Flair Limited | Manufacturing | 2016 |
| Kitchen Food Ltd | Hospitality | 2024 |
| Kitchen Kings Ltd | Hospitality | 2025 |
| Kitchen Love Ltd | Construction | 2020 |
| Kitchen Sink Live Ltd | Arts & recreation | 2019 |
| Kitchen Street Limited | Financial services | 2018 |
| Kitchen Street Property Management Ltd | Real estate | 2021 |
| KITCHEN13 Ltd | Hospitality | 2022 |
| Kitit Services Limited | Information & communication | 2026 |
| Kitson Properties Ltd | Real estate | 2023 |
| Kitted OUT Liverpool Limited | Wholesale & retail | 2017 |
| Kitted OUT Schoolwear Limited | Wholesale & retail | 2012 |
| Kitted OUT Workwear Limited | Manufacturing | 2019 |
| Kittys Group Limited | Arts & recreation | 2020 |
| KIV Motors Ltd | Wholesale & retail | 2024 |
| Kiwi Digital Limited | Information & communication | 2025 |
| Kixx South Birmingham Ltd | Education | 2022 |
| Kizzy Chizzy Ltd | Wholesale & retail | 2026 |
| Kizzy Trading Limited | Professional & scientific | 2018 |
| KJ and SON Motors Ltd | Other services | 2001 |
| KJ Dine Ltd | Hospitality | 2023 |
| KJ Estates Northern Limited | Professional & scientific | 2013 |
| KJ Fabrications (NW) Ltd | Other services | 2015 |
| KJ Grant Consulting Limited | Information & communication | 2022 |
| KJ Homes Ltd | Real estate | 2011 |
| KJ Property Solutions Ltd | Real estate | 2022 |
| KJA Aesthetics Ltd | Other services | 2021 |
| KJB Commissioning Ltd | Professional & scientific | 2024 |
| KJB Consultancy Services Limited | Administrative & support | 2022 |
| Kjbm Rentals Limited | Real estate | 2025 |
| Kjbmechengineering Ltd | Professional & scientific | 2025 |
| KJC Holdings Limited | Professional & scientific | 2015 |
| KJC Management Consultants Ltd | Professional & scientific | 2025 |
| KJC Takeaway Ltd | Hospitality | 2026 |
| KJD Consulting Ltd | Professional & scientific | 2023 |
| KJJ Sales Limited | Wholesale & retail | 2024 |
| KJK Consultancy Ltd | Construction | 2026 |
| KJK Consulting Ltd | Professional & scientific | 2008 |
| KJL Construction Ltd | Construction | 2009 |
| KJL Contractors Limited | Wholesale & retail | 2009 |
| KJM Construction Management Limited | Construction | 2026 |
| KJM Independent Ltd | Health & social care | 2015 |
| KJM INT Ltd | Wholesale & retail | 2026 |