| Kays Peake Properties Ltd | Construction | 2016 |
| KB2004 Ltd | Wholesale & retail | 2022 |
| KBD Associates Limited | Financial services | 2017 |
| KBI Contracts Ltd | Construction | 2016 |
| Kble Ltd | Information & communication | 2012 |
| Kbtb Transport Ltd | Transport & logistics | 2026 |
| KBW Consultancy Services Ltd | Information & communication | 2021 |
| KC Data Solutions Limited | Information & communication | 2015 |
| KC Entertainment Ltd | Hospitality | 2022 |
| KC Hotel (Blackpool) Ltd | Hospitality | 2018 |
| KC Hotel (Hong Kong) Limited | Hospitality | 2020 |
| Kchd Ltd | Wholesale & retail | 2018 |
| KCK Accommodation Ltd | Hospitality | 2021 |
| KDL Medical Services Limited | Health & social care | 2025 |
| KDS Direct Engineering Ltd | Professional & scientific | 2018 |
| KE Pubs Ltd | Hospitality | 2019 |
| Kearon Export-Import Ltd | Water & waste | 2011 |
| Kebab Junction Limited | Hospitality | 2025 |
| Kebab K Blackpool Ltd | Hospitality | 2020 |
| Kedra Software Ltd | Information & communication | 2018 |
| Kee-Biotics Ltd | Manufacturing | 2024 |
| Keep Security Ltd | Administrative & support | 2015 |
| Keep Trade Local Ltd | Extraterritorial | 2013 |
| Keez Coaching Ltd | Wholesale & retail | 2024 |
| Kegs@Home Limited | Wholesale & retail | 2025 |
| Keji Aofiyebi Services Limited | Information & communication | 2015 |
| Kelly Property Development Ltd | Real estate | 2018 |
| Kelly Supply Services Ltd | Information & communication | 2012 |
| Kemberton Consultancy Limited | Administrative & support | 2006 |
| KEN Bate Associates Limited | Administrative & support | 2014 |
| Kendal Hotel Ltd | Hospitality | 2025 |
| Kendal Trade Frames Limited | Construction | 2002 |
| Kendall Property Holdings Ltd | Real estate | 2024 |
| Kendostar Limited | Wholesale & retail | 2017 |
| Kenmar Investments Ltd | Real estate | 2022 |
| Kennedy Training Ltd | Wholesale & retail | 2025 |
| Kennerley Construction Ltd | Construction | 2018 |
| Kennven Limited | Information & communication | 2009 |
| Kensington House Trust | Health & social care | 1993 |
| Kentown Support | Other services | 2025 |
| Kents Bank Apartments Management Company Limited | Households | 2007 |
| Kenyons (Blackpool) Ltd | Wholesale & retail | 1960 |
| Kenzy Torquay Ltd | Hospitality | 2025 |
| Kerhoot Online Ltd | Wholesale & retail | 2020 |
| Ketchy Ltd | Wholesale & retail | 2024 |
| Kevin Heywood Construction Limited | Construction | 2023 |
| Kevomo Aisosa Ltd | Wholesale & retail | 2022 |
| Key Assured Limited | Real estate | 2020 |
| Keynest NW Rentals Ltd | Real estate | 2025 |
| Keys Co 23 Ltd | Hospitality | 2024 |
| Keystone Construction North West Limited | Construction | 2012 |
| Keystone Residential Consultancy Limited | Health & social care | 2026 |
| KG Accountancy & Bookkeeping Services Limited | Professional & scientific | 2023 |
| KG Animal Medical Limited | Professional & scientific | 2017 |
| KGR Hotels Ltd | Hospitality | 2021 |
| KH4DJ Ltd | Wholesale & retail | 2024 |
| Khamsin Consultancy Services Limited | Information & communication | 2013 |
| Khanz Chippy Limited | Hospitality | 2024 |
| Khyrenz Limited | Information & communication | 2016 |
| Ki-Star Limited | Real estate | 2020 |
| Kier Ulster Ltd | Wholesale & retail | 2025 |
| KIK Innovation Ltd | Transport & logistics | 2024 |
| Kildale Topco Limited | Professional & scientific | 2017 |
| Kilicalp Ltd | Hospitality | 2021 |
| Kilkeel Business Park Ltd | Wholesale & retail | 2025 |
| Killian Properties Ltd | Real estate | 2022 |
| Killing Time Events Ltd | Arts & recreation | 2023 |
| KIN Property Solutions Ltd | Real estate | 2024 |
| Kind Hearted Thieves Ltd | Information & communication | 2017 |
| Kindercare Ltd | Education | 2009 |
| Kindlers Limited | Wholesale & retail | 1987 |
| Kindred VFX Limited | Information & communication | 2019 |
| Kindwill Ltd | Professional & scientific | 2026 |
| King Custom Performance Ltd | Manufacturing | 2016 |
| Kingfisher IT Consulting Ltd | Information & communication | 2019 |
| Kings Arms Croft Limited | Households | 2003 |
| Kingsgate Finance Limited | Financial services | 2017 |
| Kingsman Operations Ltd | Administrative & support | 2024 |
| Kingston Mews Flat Management Company Ltd | Professional & scientific | 1997 |
| Kingswells Consultants Limited | Professional & scientific | 2017 |
| Kingswood Office Supplies Limited | Wholesale & retail | 2005 |
| Kinloch Honey Limited | Wholesale & retail | 2026 |
| Kinnegar Management Ltd | Wholesale & retail | 2025 |
| Kintyre Close 1962 Limited | Extraterritorial | 2014 |
| Kipling Developments Ltd | Construction | 2023 |
| Kirkham & Wesham Holdings Limited | Financial services | 2018 |
| Kirkham UK Limited | Wholesale & retail | 2009 |
| Kirkstone Mews Management Company Limited | Households | 2002 |
| Kiruna Property Management Ltd | Real estate | 2015 |
| Kiseki Technologies Limited | Information & communication | 2017 |
| Kishmuil Services UK Ltd | Professional & scientific | 2023 |
| Kiss Hair & Beauty (Fleetwood) Limited | Other services | 2014 |
| Kiss My AXE Ltd | Extraterritorial | 2022 |
| Kitchen - Air Limited | Administrative & support | 2011 |
| Kitchen Genie Ltd | Construction | 2015 |
| Kits Kitchen (Kendal) Limited | Hospitality | 2025 |
| Kitson Consultancy Services Ltd | Professional & scientific | 2023 |
| Kiwi Media UK Limited | Professional & scientific | 2016 |
| KJ Elite Construction Ltd | Construction | 2024 |
| KJ Elite Property Maintenance Ltd | Construction | 2024 |