| K.D.P. Electrical & Jointing Ltd | Construction | 2021 |
| K.E. Supplies Ltd | Manufacturing | 2006 |
| K.E.S Building Limited | Construction | 2022 |
| K.E.S Motor Haulage Ltd | Transport & logistics | 2025 |
| K.G.N Care Services Ltd | Administrative & support | 2025 |
| K.G.N Construction Ltd | Construction | 2025 |
| K.G.N Ltd | Wholesale & retail | 2024 |
| K.K. Toiletries Holdings Limited | Manufacturing | 2020 |
| K.K. Toiletries Limited | Manufacturing | 1997 |
| K.T.L. Plant Services Limited | Administrative & support | 2003 |
| K.T.P. Electrical Services Limited | Construction | 2005 |
| K.T.P. Medical Pdu's Limited | Construction | 2017 |
| K1 Contracting Limited | Information & communication | 2006 |
| K2 Apps Ltd | Information & communication | 2018 |
| K2 Heating and Cooling Solutions Ltd | Construction | 2009 |
| K2 Morris Green Chippy Ltd | Hospitality | 2024 |
| K2 Oral Health Limited | Health & social care | 2016 |
| K2HC Holdings Limited | Financial services | 2025 |
| K3 Advantage Limited | Financial services | 2023 |
| K3 Advisory Group Limited | Financial services | 2007 |
| K3 Business Sales Advisory Group Limited | Financial services | 2021 |
| K3 Business Services Limited | Real estate | 2015 |
| K3 Capital Group Limited | Financial services | 2020 |
| K3 Deal Advisory Capital Markets Limited | Financial services | 2018 |
| K3 Deal Advisory Limited | Professional & scientific | 2008 |
| K3 Estates LLP | | 2015 |
| K3 Law Limited | Financial services | 2021 |
| K3 Restructuring Advisory Group Limited | Extraterritorial | 2020 |
| K3 Stays Ltd | Real estate | 2026 |
| K3 Tax Advisory Group Limited | Financial services | 2021 |
| K3 Tax Advisory Limited | Financial services | 2021 |
| K7 Market Ltd | Wholesale & retail | 2025 |
| K9 Avenue Ltd | Wholesale & retail | 2025 |
| K9 Fertility and Studs Limited | Agriculture & fishing | 2021 |
| K9 Search Team & Security Dog Handling Ltd | Administrative & support | 2013 |
| KA Business Partnering Ltd | Professional & scientific | 2025 |
| KA Lasani Investment Ltd | Financial services | 2026 |
| KA Properties (North West) Ltd | Real estate | 2021 |
| KA Switch Mobile Limited | Wholesale & retail | 2022 |
| KA7 Ltd | Health & social care | 2014 |
| Kabaddle Ltd | Information & communication | 2020 |
| Kabejja Co Limited | Health & social care | 2023 |
| Kabs Services Ltd | Transport & logistics | 2022 |
| Kadak Kapital Ltd | Real estate | 2024 |
| Kadak Sardar Ltd | Wholesale & retail | 2024 |
| Kaddee Travels Ltd | Transport & logistics | 2026 |
| Kade Cabling Solutions Ltd | Construction | 2024 |
| Kadhar Viaggio Ltd | Transport & logistics | 2025 |
| Kadva Estates Ltd | Real estate | 2013 |
| Kadva Investments Limited | Real estate | 2015 |
| Kadva Nextgen Ltd | Wholesale & retail | 2024 |
| Kaelauk Ltd | Wholesale & retail | 2025 |
| KAF Consulting Limited | Professional & scientific | 2025 |
| Kaffarah CIC | Hospitality | 2023 |
| Kagzi Limited | Transport & logistics | 2025 |
| Kairos Dawson Limited | Information & communication | 2023 |
| Kairos Transport Ltd | Transport & logistics | 2026 |
| Kaiten Data Services Limited | Information & communication | 2021 |
| Kaizen Engineering Solutions Limited | Professional & scientific | 2024 |
| Kaizen Healthcare Limited | Construction | 1999 |
| Kaizen Law Solicitors Ltd | Professional & scientific | 2015 |
| Kaizendo Ltd | Information & communication | 2025 |
| Kaizenia Limited | Wholesale & retail | 2025 |
| Kako Limited | Wholesale & retail | 2024 |
| Kala Bistro Limited | Hospitality | 2018 |
| Kalaputsa Mutsa Ltd | Hospitality | 2025 |
| Kalas Group Ltd | Wholesale & retail | 2026 |
| Kaleo Property Ltd | Real estate | 2025 |
| Kallista Imprints and Excavation Services Limited | Construction | 2025 |
| Kalodio Ltd | Financial services | 2019 |
| Kaloglian Sonego Enterprises Limited | Health & social care | 2023 |
| Kalriyad Ltd | Health & social care | 2014 |
| Kaltz Ltd | Information & communication | 2000 |
| Kalyan Property Investment Ltd | Real estate | 2025 |
| KAM Consultancy Manchester Limited | Professional & scientific | 2019 |
| KAM Diagnostics Ltd | Wholesale & retail | 2026 |
| KAM Karma Films Ltd | Information & communication | 2026 |
| KAM Locums Ltd | Health & social care | 2020 |
| Kam's Barber Shop Ltd | Wholesale & retail | 2023 |
| Kamado Ltd | Other services | 2014 |
| Kamak Ltd | Real estate | 2021 |
| Kamakconsulting Ltd | Professional & scientific | 2026 |
| Kamal & Associates Limited | Wholesale & retail | 2006 |
| Kamanza Ltd | Education | 2024 |
| Kamar Chiropractic Ltd. | Health & social care | 2014 |
| Kamfam Limited | Real estate | 2023 |
| Kamil Estates Ltd | Real estate | 2022 |
| Kampns Secret Ltd | Wholesale & retail | 2025 |
| Kamtemia Limited | Professional & scientific | 2015 |
| Kamzak Properties Limited | Real estate | 2019 |
| Kanchan Holistic Limited | Health & social care | 2010 |
| Kanda Finds Limited | Wholesale & retail | 2025 |
| Kandathil Properties Ltd | Real estate | 2021 |
| Kane EP 1 Ltd | Professional & scientific | 2017 |
| Kane EP 2 Ltd | Administrative & support | 2010 |
| Kane Makinson Ltd | Construction | 2026 |
| Kanes Mobile Cuts Limited | Other services | 2026 |
| Kang Medical Consulting Limited | Manufacturing | 2024 |
| Kani Market Ltd | Wholesale & retail | 2025 |
| Kania Property Company Limited | Construction | 2020 |