| Kantar Advisory Partners Limited | Administrative & support | 2020 |
| Kanto Enix Investments Ltd | Real estate | 2025 |
| Kantsev Linux Laboratory Limited | Information & communication | 2023 |
| Kanzar Holdings Ltd | Financial services | 2025 |
| Kapiri Ltd | Hospitality | 2022 |
| Kapital Accounting Ltd | Extraterritorial | 2024 |
| Kapitalism Properties Ltd | Real estate | 2023 |
| Kapra Design Ltd | Wholesale & retail | 2025 |
| Kara Nicole Ltd | Other services | 2017 |
| Kara Property Group Ltd | Construction | 2017 |
| Karachist's Foods and Services Limited | Manufacturing | 2014 |
| Karadonna Limited | Real estate | 2011 |
| Kareem's Kitchen Limited | Manufacturing | 2024 |
| Karen Bates Aesthetics Ltd | Health & social care | 2015 |
| Karen Thomas-Bland Limited | Health & social care | 2018 |
| Kares Collection Ltd | Public administration | 2021 |
| Karigai Ltd | Manufacturing | 2026 |
| Karims Real Estate Limited | Real estate | 2008 |
| Karko Barbers Ltd | Other services | 2025 |
| Karl M Ward Limited | Transport & logistics | 2018 |
| Karl Price Developments and Agent Ltd | Real estate | 2017 |
| Karlines Bolton Ltd | Wholesale & retail | 2019 |
| Karmadi Properties LLP | | 2023 |
| Karman Consulting Limited | Professional & scientific | 2024 |
| Karmo Limited | Construction | 2006 |
| Karo Healthcare Resources Limited | Administrative & support | 2025 |
| Karoli(Uk) Ltd | Wholesale & retail | 2025 |
| Karowna Facilities Management Ltd | Real estate | 2015 |
| Karsan Assets Ltd | Real estate | 2023 |
| Karsan Holdings Ltd | Real estate | 2012 |
| Kartikeya Property Services Ltd | Construction | 2025 |
| KAS Falcon Services Ltd | Administrative & support | 2021 |
| Kasf Limited | Health & social care | 2025 |
| Kash Tracks Ltd | Other services | 2026 |
| Kashif Imran Ltd | Wholesale & retail | 2025 |
| Kashmir Builders Ltd | Construction | 2024 |
| Kashmir Food Store (Farnworth) Ltd | Wholesale & retail | 2025 |
| Kashmirtransport Ltd | Transport & logistics | 2022 |
| Kashmo Limited | Information & communication | 2026 |
| Kasmir Associates Limited | Administrative & support | 2016 |
| Kassim & Co Ltd | Wholesale & retail | 2022 |
| Kat's Knick Knacks Ltd | Wholesale & retail | 2024 |
| Katcards Ltd | Wholesale & retail | 2026 |
| Kate Fashionand Beauty Limited | Wholesale & retail | 2025 |
| Katedavies Ltd | Hospitality | 2023 |
| Kathryn Bentley Ltd | Health & social care | 2019 |
| Kathryn Court Management Company Limited | Households | 1989 |
| Kathryn Eade Limited | Administrative & support | 2021 |
| Katia Crafts Ltd | Wholesale & retail | 2020 |
| Katsu Katsu Ltd | Hospitality | 2024 |
| Kattakayam Medical Services Limited | Health & social care | 2013 |
| Kattapult Ltd | Administrative & support | 2020 |
| Katy Clayton Limited | Arts & recreation | 2018 |
| Kaur Brow Bar Ltd | Other services | 2022 |
| Kavic Solutions Limited | Information & communication | 2025 |
| Kavithathomas Health Care Limited | Health & social care | 2015 |
| Kawa Properties Limited | Real estate | 2024 |
| Kawaiidating Ltd | Transport & logistics | 2019 |
| Kawthar Foods Ltd | Wholesale & retail | 2020 |
| Kayaj&Co Ltd | Professional & scientific | 2022 |
| Kaymar Court (Bolton) Management Company Limited | Other services | 2010 |
| Kays Asbestos Removals Ltd | Water & waste | 2026 |
| Kays Collection Ltd | Wholesale & retail | 2021 |
| Kays Farm Retreat Ltd | Hospitality | 2021 |
| Kaytex Property Ltd | Real estate | 2024 |
| Kay’S Days Limited | Wholesale & retail | 2025 |
| KAZ Global Traders Ltd | Wholesale & retail | 2025 |
| Kazu Transport Limited | Transport & logistics | 2024 |
| KB Aesthetic Supplies Limited | Wholesale & retail | 2022 |
| KB Appliances Ltd | Wholesale & retail | 2022 |
| KB Cooling Limited | Energy | 2022 |
| Kb's Catering Service Limited | Hospitality | 2015 |
| Kbal Ltd | Manufacturing | 2024 |
| KBK Restaurants Ltd | Extraterritorial | 2018 |
| KBL Solicitors LLP | | 2015 |
| KBS Corporate Finance Limited | Financial services | 2014 |
| KBS Corporate Sales Limited | Professional & scientific | 2001 |
| Kbwebstudios Ltd | Information & communication | 2025 |
| KC Blackrod Ltd | Hospitality | 2025 |
| KC Mini Market Ltd | Wholesale & retail | 2022 |
| KC Psychological Services Ltd | Health & social care | 2026 |
| KC Transport Services Ltd | Transport & logistics | 2024 |
| Kc&T Maintenance Solutions Ltd | Construction | 2023 |
| KCB Roofing & Cladding Ltd | Construction | 2021 |
| KCC (Bolton) Ltd | Hospitality | 2018 |
| KCJ Healthcare Limited | Health & social care | 2018 |
| KCL DRY Risers Ltd | Construction | 2025 |
| KCW Business Solutions Limited | Professional & scientific | 2025 |
| KD 2025 Ltd | Real estate | 2025 |
| KD Aesthetics & Skin Care Ltd | Other services | 2023 |
| KD Comms Holdings Ltd | Financial services | 2021 |
| KD Watches Limited | Wholesale & retail | 2022 |
| KDA Floors Ltd | Construction | 2024 |
| Kdeal Supplies Ltd | Wholesale & retail | 2025 |
| KDH 58 Ltd | Financial services | 2023 |
| Kdhdhc Ltd | Wholesale & retail | 2016 |
| KDJ Inspired Ltd | Wholesale & retail | 2019 |
| KDP Haulier Ltd | Transport & logistics | 2024 |
| KE Investigations Ltd | Administrative & support | 2022 |
| Keane Property Solutions Ltd | Real estate | 2026 |