| Keystone Rehab Ltd | Health & social care | 2020 |
| Keytech Cctv Limited | Administrative & support | 2009 |
| Keytech Security Int'L Limited | Administrative & support | 2020 |
| Keyturn Management Limited | Real estate | 2024 |
| KG Trading Ltd | Wholesale & retail | 2022 |
| KG68-OFFSHORE Ltd | Construction | 2023 |
| KGM Decor Ltd | Construction | 2026 |
| KH UK Transport Ltd | Transport & logistics | 2024 |
| Khadija's Lounge Limited | Other services | 2023 |
| Khadijas Cafe Ltd | Hospitality | 2023 |
| Khai Spice Ltd | Hospitality | 2025 |
| Khan & Co Property Group Ltd | Real estate | 2026 |
| Khan Assets Pro Ltd | Administrative & support | 2026 |
| Khan Baba Mart Ltd | Wholesale & retail | 2026 |
| Khan Optics (Rochdale) Ltd | Health & social care | 2017 |
| Khan Optics Limited | Professional & scientific | 2008 |
| Khan's Samosas Ltd | Wholesale & retail | 2024 |
| Khanx Ltd | Households | 2023 |
| Khatar Foods Ltd | Wholesale & retail | 2011 |
| Khatar Ltd | Real estate | 2021 |
| Khawaja Wealth Management Limited | Financial services | 2014 |
| Khawars & Impex Ltd | Wholesale & retail | 2025 |
| KHD Plant Hire Ltd | Construction | 2025 |
| Khhms Ltd | Wholesale & retail | 2020 |
| Kiawah Properties LLP | | 2006 |
| Kickit Events Ltd | Administrative & support | 2025 |
| Kidicraft Ltd | Wholesale & retail | 2008 |
| Kids Bouncy Castles Ltd | Health & social care | 2022 |
| Kids Kirby Limited | Wholesale & retail | 2007 |
| Kidz Clothing Limited | Wholesale & retail | 2024 |
| Kidz in Style Ltd | Wholesale & retail | 2013 |
| Kidz With Character Ltd | Wholesale & retail | 2017 |
| Kikfit Sports Limited | Wholesale & retail | 2025 |
| Kiltbox Ltd | Wholesale & retail | 2020 |
| Kimat Ltd | Wholesale & retail | 2022 |
| Kind Healthcare Group of Services Ltd | Health & social care | 2024 |
| Kinder Interiors Limited | Construction | 2005 |
| Kindspace Therapy Ltd | Health & social care | 2025 |
| Kinetic Contract Solutions Ltd | Construction | 2026 |
| Kinews Studio Limited | Professional & scientific | 2024 |
| King Estate Ltd | Real estate | 2020 |
| King of Kings Tea Ltd | Wholesale & retail | 2024 |
| Kings Barbers (Sharwet) Ltd | Other services | 2020 |
| Kins Associates Limited | Financial services | 2014 |
| Kippax Ltd | Manufacturing | 2017 |
| Kiren Foods Limited | Wholesale & retail | 2010 |
| Kirk Fire Ltd | Construction | 2012 |
| Kismet Estates Limited | Real estate | 2020 |
| Kitchen 22 Ltd | Hospitality | 2025 |
| Kitchen DIY Ltd | Professional & scientific | 2021 |
| Kitchen Takeaway Ltd | Hospitality | 2026 |
| Kite Running Limited | Real estate | 2020 |
| Kithaus Living Ltd | Wholesale & retail | 2025 |
| Kitserv Technical Solutions Ltd | Professional & scientific | 2018 |
| Kitson Joinery Ltd | Construction | 2024 |
| Kitty Construction Ltd | Construction | 2021 |
| Kitty Wang Limited | Professional & scientific | 2021 |
| KJ Capital Group Ltd | Financial services | 2024 |
| KJ Enterprises Holdings Ltd. | Information & communication | 2018 |
| KJ Refrigeration Manchester Ltd | Other services | 2021 |
| KJ Sea Fresh Limited | Wholesale & retail | 2013 |
| KJF Medical Limited | Health & social care | 2021 |
| KJH Traders Limited | Wholesale & retail | 2025 |
| Kjxh Services Limited | Professional & scientific | 2025 |
| KK 804 Ltd | Wholesale & retail | 2024 |
| KK Convenience Ltd | Wholesale & retail | 2025 |
| KK Shop Ltd | Wholesale & retail | 2020 |
| Kk's Traders Ltd | Wholesale & retail | 2023 |
| Klearmotion Ltd | Wholesale & retail | 2018 |
| Kleen Strike (UK) Limited | Other services | 1983 |
| Klic LPM Limited | Real estate | 2022 |
| KLQ Ltd | Administrative & support | 2026 |
| KM Heating Services Ltd | Construction | 2022 |
| KME Properties Limited | Real estate | 2014 |
| KMJ Store Ltd | Wholesale & retail | 2013 |
| KMJ UK Properties Ltd | Real estate | 2026 |
| KMR Accountancy Services Ltd | Professional & scientific | 2023 |
| KND Financial Solutions Ltd | Financial services | 2024 |
| Knevatech Limited | Information & communication | 2025 |
| Knockout Kitchen the Healthy Choice Limited | Hospitality | 2022 |
| Knockout Snacks Limited | Hospitality | 2022 |
| Knowl View Associates Ltd | Professional & scientific | 2013 |
| KNP Motors Limited | Wholesale & retail | 2024 |
| KNP Property Services Limited | Real estate | 2017 |
| Koko Lounge Ltd | Hospitality | 2011 |
| Kolachi Essentials Limited | Wholesale & retail | 2026 |
| Kolatech Limited | Wholesale & retail | 2026 |
| Kollymax Limited | Health & social care | 2018 |
| Komdoke Limited | Professional & scientific | 2017 |
| Komxin Ltd | Wholesale & retail | 2025 |
| Konsan (UK) Limited | Wholesale & retail | 1994 |
| Korvix Trading Ltd | Wholesale & retail | 2026 |
| Kosi London Ltd | Wholesale & retail | 2024 |
| Kosuke Limited | Hospitality | 2025 |
| Kovae Limited | Wholesale & retail | 2026 |
| Kozo Ltd | Wholesale & retail | 2023 |
| Kppbusiness Limited | Professional & scientific | 2004 |
| Kprs Properties Limited | Real estate | 2023 |
| KR Beauty Clinic Ltd | Other services | 2025 |
| KR Pizzaplus Ltd | Hospitality | 2025 |