| Knightland Road Ltd | Real estate | 2023 |
| Knightsbridge Holdings Ltd | Households | 2024 |
| Knitland Limited | Manufacturing | 2019 |
| Knock Culture Limited | Professional & scientific | 2023 |
| Knock Shelters Ltd | Hospitality | 2024 |
| Knoll Assets Limited | Real estate | 2025 |
| Knotty ASH Properties Ltd | Extraterritorial | 2017 |
| Knowels Street Estates Ltd | Real estate | 2023 |
| Knowthyself Ltd | Arts & recreation | 2026 |
| Knox Road (Car Park) Limited | Real estate | 1998 |
| KNT Solutions Ltd | Professional & scientific | 2025 |
| Knurb Ltd | Professional & scientific | 2025 |
| Kobanicuts Limited | Other services | 2026 |
| Kobida Grill House Ltd | Hospitality | 2026 |
| Kochav Estates Ltd | Real estate | 2024 |
| Kodist Limited | Wholesale & retail | 2025 |
| Kofacony Ventures Limited | Administrative & support | 2016 |
| Kogwuonye Limited | Administrative & support | 2023 |
| Kokoa UX Ltd | Professional & scientific | 2025 |
| KOL TIV Properties Ltd | Real estate | 2025 |
| KOL Torah MCR Limited | Wholesale & retail | 2012 |
| Kolel Torah Vyireh Ltd | Health & social care | 2018 |
| Kollel Kinyan Hashas Ltd | Other services | 2021 |
| Kollel Tiferes Shmuel Ltd | Education | 2019 |
| Kollel Yetev LEV Ltd | Education | 2020 |
| Kollie Ltd | Manufacturing | 2024 |
| Kolyom Trust Limited | Other services | 2004 |
| Kopacha Construction Limited | Construction | 2017 |
| Kopano Healthcare Resources Limited | Administrative & support | 2025 |
| Koracso Home Ltd | Real estate | 2024 |
| Kore Talent Limited | Households | 2020 |
| Kornwells Ltd | Professional & scientific | 2020 |
| KOS Foods Ltd | Wholesale & retail | 2021 |
| KOS Group Limited | Real estate | 2021 |
| Kosher Drinks Ltd | Wholesale & retail | 2024 |
| Kosher Group Ltd | Administrative & support | 2026 |
| Kosher Management Ltd | Hospitality | 2024 |
| Kosher MCR Ltd | Hospitality | 2018 |
| Kosher Media Ltd | Wholesale & retail | 2019 |
| Kosher Phoods Ltd | Manufacturing | 2025 |
| Kosher Savers Limited | Wholesale & retail | 2011 |
| Kosher Value Limited | Hospitality | 2018 |
| Kotrie Property Investments Limited | Real estate | 2018 |
| Kozmier Ltd | Real estate | 2020 |
| KP Nadlan Ltd | Real estate | 2026 |
| KP Roofing Contractors Salford Ltd | Construction | 2024 |
| Kplsupreme CIC | Health & social care | 2025 |
| Kressida Limited | Hospitality | 2021 |
| Krinks Hair Stylists Limited | Real estate | 1959 |
| Kristal KIZ Ltd | Wholesale & retail | 2026 |
| Kronks Pizza Ltd | Hospitality | 2023 |
| Kronks Pizza Salford Ltd | Hospitality | 2024 |
| Krygon Studios Ltd | Arts & recreation | 2023 |
| KS Family Law Ltd | Professional & scientific | 2025 |
| KS Golden Wines Ltd | Wholesale & retail | 2026 |
| KSB Properties Investments Ltd | Real estate | 2021 |
| KSD Sustainability Consultants Ltd | Professional & scientific | 2017 |
| Ksmg Limited | Information & communication | 2017 |
| KT Connections Ltd | Administrative & support | 2023 |
| Kuji Cleaning Services Limited | Administrative & support | 2023 |
| Kunshan Hongyongsheng Mold Co. Ltd | Wholesale & retail | 2025 |
| Kunzam Holdings Ltd | Other services | 2025 |
| Kupas Hachesed Ltd | Health & social care | 2020 |
| Kupas Rashbi Ltd | Other services | 2000 |
| Kupferstein Limited | Real estate | 2022 |
| Kurdistan Mini Market (Cheetham Hill) Ltd | Wholesale & retail | 2025 |
| Kuzimax Limited | Wholesale & retail | 2023 |
| Kw&Y Homes Ltd | Real estate | 2022 |
| Kwartz Vision Limited | Health & social care | 2021 |
| Kween Limited | Professional & scientific | 2008 |
| Kwikfine Limited | Extraterritorial | 1997 |
| Kynect Limited | Health & social care | 2025 |
| Kyngshome Limited | Professional & scientific | 2008 |
| Kys-R Ltd | Professional & scientific | 2018 |
| KZA Commerce Ltd | Wholesale & retail | 2026 |
| KZN Development Ltd | Information & communication | 2025 |
| L & C Import and Export Ltd | Wholesale & retail | 2010 |
| L & SM Property Limited | Real estate | 2019 |
| L a Properties (Manchester) Ltd | Real estate | 2024 |
| L Coombs Property Ltd | Real estate | 2024 |
| L R L Services Limited | Administrative & support | 2024 |
| L&D Group Enterprises Ltd | Financial services | 2023 |
| L'Amour Seductive Lingerie Ltd | Manufacturing | 2021 |
| L'Escale Florist & Boutique Ltd | Wholesale & retail | 2026 |
| L-Kaoni Limited | Wholesale & retail | 2024 |
| L. G. Marketing Intl Limited | Wholesale & retail | 2012 |
| L.Fernandes Ltd | Health & social care | 2020 |
| L.G.A. Europe Limited | Manufacturing | 1997 |
| L.P.Barker Ltd | Construction | 2014 |
| L.T.J. Projects Limited | Professional & scientific | 2020 |
| L10 Communications Ltd | Financial services | 2024 |
| L11 Communications Ltd | Administrative & support | 2024 |
| L2 Communications Ltd | Administrative & support | 2024 |
| LA Bella Manchester Ltd | Other services | 2021 |
| LA Bowtique Ltd | Manufacturing | 2017 |
| LA Casita Familia (NW) Limited | Real estate | 2022 |
| LA Casita Familia Limited | Financial services | 2022 |
| LA Casita Familia SPV 1 Limited | Financial services | 2023 |
| LA Casita Familia SPV 2 Limited | Real estate | 2024 |
| LA Femme Hair & Beauty Ltd | Other services | 2020 |