| K Rundell Limited | Construction | 2017 |
| K S Beazley & Sons Limited | Construction | 2014 |
| K Sandhu Developments Ltd | Construction | 2018 |
| K Schmeichel Limited | Professional & scientific | 2007 |
| K Stop Limited | Wholesale & retail | 2025 |
| K Style Barbers Ltd | Other services | 2023 |
| K Wedding Films Ltd | Professional & scientific | 2025 |
| K&E Property 2025 Ltd | Households | 2025 |
| K&J Events Derbyshire Ltd | Arts & recreation | 2025 |
| K&M Tree Care and Landscaping Limited | Agriculture & fishing | 2024 |
| K&R Properties (Derby) Ltd | Real estate | 2021 |
| K&S Cavan Convenience Store Ltd | Wholesale & retail | 2025 |
| K&S Security Services Limited | Administrative & support | 2022 |
| K&V Properties Ltd | Other services | 2014 |
| K-Audio Ltd | Manufacturing | 2023 |
| K. Wall Contractors Limited | Construction | 1997 |
| K.A. Building Services Ltd | Construction | 2025 |
| K.A.V Construction Limited | Construction | 2018 |
| K.C Coaching Ltd | Other services | 2023 |
| K.D.R. Estate Services Limited | Real estate | 2026 |
| K.J. Motors Derby Limited | Wholesale & retail | 2013 |
| K.L.B. (Textiles) Limited | Real estate | 1978 |
| K.T.C International Ltd | Administrative & support | 2019 |
| K.T.J. Designs Limited | Real estate | 2000 |
| K.W.S. Windows Ltd. | Wholesale & retail | 1996 |
| K10 Property Solutions Ltd | Real estate | 2018 |
| K2 Investments INT Ltd | Professional & scientific | 2021 |
| K2 Management Solutions Limited | Professional & scientific | 2002 |
| K2B Logistics Ltd | Transport & logistics | 2026 |
| K2C Associates Ltd | Extraterritorial | 2018 |
| K9 PAW Security Facilities Ltd | Administrative & support | 2025 |
| K9 Platinum Limited | Agriculture & fishing | 2025 |
| KA Foodz Limited | Hospitality | 2025 |
| KA Management & Consulting Ltd | Professional & scientific | 2019 |
| KA Premier UK Limited | Wholesale & retail | 2018 |
| KA Shing Holdings Ltd | Financial services | 2020 |
| KAA Investment Group Ltd | Hospitality | 2023 |
| KAA Motor Group Ltd | Wholesale & retail | 2025 |
| KAA Property Investments Limited | Real estate | 2023 |
| KAB Geo-Solutions Limited | Professional & scientific | 2019 |
| Kabanda Technologies Limited | Information & communication | 2015 |
| Kabs Motor Group Ltd | Wholesale & retail | 2025 |
| Kabul Crown Derby Ltd | Hospitality | 2025 |
| Kabul Crown Ltd | Hospitality | 2025 |
| KAD Finance Limited | Financial services | 2014 |
| Kade Limited | Hospitality | 2026 |
| Kafi Foods Limited | Hospitality | 2025 |
| Kage Consultancy Limited | Professional & scientific | 2022 |
| Kagumu Adventures (UK) Ltd | Administrative & support | 2017 |
| Kahani Hair OIL Ltd | Wholesale & retail | 2026 |
| Kailash Locums Ltd | Professional & scientific | 2017 |
| Kaippans Limited | Professional & scientific | 2025 |
| Kaizen Reece Group Ltd | Financial services | 2020 |
| Kaizen Reece Property Ltd | Real estate | 2021 |
| Kaizen Sports Group Ltd | Arts & recreation | 2021 |
| Kaka's Butchers Derby Limited | Wholesale & retail | 2025 |
| Kakara Stores Limited | Wholesale & retail | 2024 |
| Kakas Corner Shop Limited | Wholesale & retail | 2025 |
| Kakes by KAL Ltd | Manufacturing | 2026 |
| Kakkle Limited | Information & communication | 2024 |
| Kaku & Co Ltd | Professional & scientific | 2025 |
| Kallio Investments Limited | Real estate | 2024 |
| Kalm Investments Limited | Real estate | 2013 |
| KAM Garage Limited | Wholesale & retail | 2023 |
| Kama PUB Co Limited | Other services | 2022 |
| Kamarrah Limited | Administrative & support | 2017 |
| Kamasos Ltd | Health & social care | 2015 |
| Kambano Ltd | Information & communication | 2023 |
| Kamen GC Limited | Professional & scientific | 2019 |
| Kamill Estates Ltd | Real estate | 2024 |
| Kamran Maan Limited | Wholesale & retail | 2025 |
| Kanchan's Dataalchemy Limited | Information & communication | 2025 |
| Kandela Lighting Limited | Manufacturing | 1987 |
| Kandela Manufacturing Ltd | Manufacturing | 2025 |
| Kando Developments Ltd | Real estate | 2025 |
| Kang & Co Developments Ltd | Real estate | 2025 |
| Kang Kingsway Limited | Construction | 1989 |
| Kang Saab Investments Limited | Real estate | 2025 |
| Kang Saab Limited | Transport & logistics | 2020 |
| Kanhai Global Ltd | Construction | 2025 |
| Kans Properties Ltd | Real estate | 2024 |
| Kanska Ltd | Real estate | 2022 |
| Kanwals Collection Ltd | Wholesale & retail | 2024 |
| Kaon Mechanical Engineering Ltd | Professional & scientific | 2024 |
| Kappture Limited | Information & communication | 2011 |
| Kappuccino Apps Limited | Information & communication | 2018 |
| Kapra Mandi Derby Limited | Wholesale & retail | 2024 |
| Kara Housing Consultants Limited | Professional & scientific | 2005 |
| Karam Properties Limited | Real estate | 2008 |
| Karan Maan Ltd | Transport & logistics | 2024 |
| Karate Grafika Limited | Administrative & support | 2005 |
| Kare Solutions Properties Ltd | Real estate | 2022 |
| Karen Lawlor Limited | Other services | 2000 |
| Karen Ringland Ltd | Arts & recreation | 2009 |
| Karevault Limited | Information & communication | 2026 |
| Karia Accountants Ltd | Professional & scientific | 2013 |
| Karkeds Properties and Investments Ltd | Real estate | 2023 |
| Karl Gunn Ltd | Transport & logistics | 2017 |
| Karl-Kuf Logistics Ltd | Transport & logistics | 2019 |
| Karmoon Limited | Information & communication | 2017 |