| Karydis Properties Limited | Real estate | 2019 |
| Karygray Feeds Limited | Wholesale & retail | 2014 |
| KAS Travel Ltd | Administrative & support | 2019 |
| Kasa Group Unlimited | Real estate | 2025 |
| Kasa Property Ltd | Real estate | 2025 |
| Kasa Psychotherapy CIC | Health & social care | 2021 |
| Kasca Investments Limited | Real estate | 2024 |
| Kasca Limited | Real estate | 2004 |
| Kash International Limited | Information & communication | 2023 |
| Kash Logs Limited | Transport & logistics | 2026 |
| Kash Takeaway Ltd | Hospitality | 2021 |
| Kashmir Classic Chicken Ltd | Hospitality | 2026 |
| Kashmir Continental Limited | Real estate | 2015 |
| Kashmir Delight Ltd | Hospitality | 2025 |
| Kashmir Jewellers Ltd | Wholesale & retail | 2026 |
| Kashmir Tandoori House Ltd | Hospitality | 2023 |
| Kashmir Travel Services Ltd | Administrative & support | 2026 |
| Kashmirpur Limited | Professional & scientific | 2010 |
| Kashu Trading Limited | Wholesale & retail | 2026 |
| Kashub Ltd | Transport & logistics | 2015 |
| Kaskylou's Bargains Ltd | Wholesale & retail | 2024 |
| KASS26 Ltd | Real estate | 2026 |
| Kassa Homes Limited | Real estate | 2022 |
| Kassa Products Ltd | Wholesale & retail | 2024 |
| Kast Management Limited | Real estate | 2021 |
| Kate Shepherd Associates Limited | Professional & scientific | 2008 |
| Kate's Great Cakes Nottingham Ltd | Wholesale & retail | 2018 |
| Kateluxebeauty Ltd | Wholesale & retail | 2026 |
| Katenmag Leosab Ltd | Transport & logistics | 2025 |
| Katerry Care Ltd | Health & social care | 2024 |
| Kath Thomas Consulting Ltd | Education | 2019 |
| Katherine Harvey Limited | Professional & scientific | 2015 |
| Kathija & Rafi PVT Ltd | Health & social care | 2021 |
| Kathija and Rafi Property PVT Limited | Real estate | 2022 |
| Kathir Consultancy Ltd. | Information & communication | 2015 |
| Kathmandu and Palpa Limited | Hospitality | 2022 |
| Kathryn Meir Limited | Financial services | 2010 |
| Kathu Environmental Limited | Professional & scientific | 2019 |
| Kathys Bars Ltd | Hospitality | 2019 |
| Katie Grogan Limited | Financial services | 2013 |
| Katie Homes Limited | Real estate | 2009 |
| Katie Layla’S Properties Ltd | Real estate | 2026 |
| Katie’S Nails Studio Limited | Other services | 2025 |
| Kative Ltd | Education | 2024 |
| Kato Pictures Ltd | Information & communication | 2019 |
| Kato-Entex Limited | Manufacturing | 1993 |
| Katryn KAY Limited | Wholesale & retail | 2016 |
| Kaufland Mini Market Ltd | Wholesale & retail | 2022 |
| Kaunas Bidco Limited | Financial services | 2025 |
| Kaurgarry Limited | Construction | 2026 |
| Kausalyze Limited | Information & communication | 2025 |
| Kauzio Ltd | Information & communication | 2025 |
| KAV Stores Limited | Wholesale & retail | 2019 |
| Kavalieros Properties Limited | Real estate | 2022 |
| Kavanagh & Coates Funeral Services Limited | Extraterritorial | 2003 |
| Kaveh Engineering Group Ltd | Wholesale & retail | 2025 |
| Kavl and Associates Ltd | Professional & scientific | 2021 |
| Kavleen Food & Wine Ltd | Wholesale & retail | 2025 |
| KAW Developments Ltd | Real estate | 2021 |
| Kawaiipaws Ltd | Wholesale & retail | 2024 |
| KAY (East Midlands) Properties Ltd | Households | 2020 |
| KAY MC Ltd | Hospitality | 2025 |
| Kay's Caribbean Cuisine Ltd | Financial services | 2023 |
| Kaya Bookkeeping Ltd | Professional & scientific | 2019 |
| Kaya Manor Catering Ltd | Hospitality | 2026 |
| Kayani Finance Limited | Professional & scientific | 2006 |
| KAYANI8 Investments Limited | Real estate | 2021 |
| Kayasm Ltd | Real estate | 2025 |
| Kaycee Living Limited | Real estate | 2026 |
| Kayconnect Ltd | Wholesale & retail | 2025 |
| Kaydee Homes Ltd | Health & social care | 2024 |
| Kayellzee Limited | Health & social care | 2020 |
| Kayem Studio Ltd | Professional & scientific | 2026 |
| Kayes Walk Holdings Limited | Financial services | 2024 |
| Kaylee Transfers Limited | Manufacturing | 1948 |
| Kaypharm Limited | Professional & scientific | 2022 |
| Kays Biopharmaceutical Ltd | Professional & scientific | 2022 |
| Kayz Property Services Ltd | Real estate | 2023 |
| KAZ Barber Ltd | Other services | 2026 |
| Kazashu Investment Ltd | Real estate | 2022 |
| Kaze Ltd | Wholesale & retail | 2019 |
| Kaze Team Ltd | Transport & logistics | 2019 |
| Kazeem Tunde Agunbiade Ltd | Health & social care | 2025 |
| Kazi OFF Licence Ltd | Wholesale & retail | 2026 |
| Kazumi Exchange Arcade Ltd | Hospitality | 2021 |
| KB Design & Engineering Services Ltd | Professional & scientific | 2013 |
| KB Design Limited | Construction | 2024 |
| KB Family Law Ltd | Professional & scientific | 2021 |
| KB Hair Loss Systems Ltd | Other services | 2017 |
| KB OT Services Limited | Health & social care | 2015 |
| KB Paint & Decor Ltd | Construction | 2026 |
| KB Solutions Nottingham Limited | Other services | 2019 |
| KBC Airsoft Limited | Wholesale & retail | 2018 |
| KBC Property Ltd | Real estate | 2022 |
| Kbfx Trading Ltd | Financial services | 2024 |
| KBH Limited | Wholesale & retail | 2008 |
| Kbkharal Ltd | Hospitality | 2025 |
| KBR Management Services Limited | Financial services | 2025 |
| KBT Health Care Ltd | Health & social care | 2023 |
| KC Delivery Ltd | Transport & logistics | 2024 |