| KAS ALE Houses Ltd | Hospitality | 2022 |
| Kasai Brazilian JIU Jitsu Limited | Arts & recreation | 2025 |
| Kashi Property Investments Limited | Real estate | 2020 |
| Kaspian Electrical Ltd | Construction | 2026 |
| Kasst 8 Ltd | Information & communication | 2025 |
| KAT Walczak Limited | Transport & logistics | 2021 |
| KAT1 GAS Safety Services Limited | Energy | 2014 |
| Kataleya Ltd | Manufacturing | 2023 |
| Kate Finley Home Boarding Limited | Other services | 2018 |
| Kate Mciver Skin Ltd | Other services | 2018 |
| Kate Rodenhurst Ltd | Professional & scientific | 2007 |
| Katerini Ltd | Health & social care | 2019 |
| Kates Beauty Ltd | Other services | 2019 |
| Katex Consultancy Ltd | Administrative & support | 2018 |
| Kath Coles Trading Limited | Professional & scientific | 2015 |
| Kathd Lifting Ltd | Construction | 2022 |
| Katherine Hodgson Ltd | Information & communication | 2022 |
| Kathjay Consulting Limited | Information & communication | 2018 |
| Kathryn Charles Limited | Real estate | 2010 |
| Kathryn Constantine Limited | Professional & scientific | 2017 |
| Kathryn Kavanagh Education Ltd | Education | 2023 |
| Kathryns Two Limited | Wholesale & retail | 2016 |
| Katie Bishop Aesthetics Ltd | Other services | 2022 |
| Katie Harrison Hair Studio Ltd | Other services | 2022 |
| Katie Nicholas Limited | Arts & recreation | 2018 |
| Katie O'Shaughnessy Limited | Professional & scientific | 2013 |
| Katie Sarah Limited | Professional & scientific | 2022 |
| Katiecares | Health & social care | 2018 |
| Katiesboutique Ltd. | Manufacturing | 2015 |
| Katkapi Limited | Hospitality | 2026 |
| Katlou Limited | Health & social care | 2024 |
| Kats Care Limited | Health & social care | 2015 |
| Katumba Ltd | Wholesale & retail | 2025 |
| KATYWARD91 Limited | Professional & scientific | 2017 |
| Kaufmann CS Ltd | Administrative & support | 2025 |
| Kaven Food and Wine Limited | Wholesale & retail | 2018 |
| Kavg Group Limited | Construction | 2018 |
| Kavix Ltd | Hospitality | 2025 |
| Kavshah Properties Ltd | Real estate | 2026 |
| Kawa Hairstyle Ltd | Other services | 2025 |
| Kawamura Limited | Professional & scientific | 2025 |
| KAY Developments Ltd | Construction | 1999 |
| KAY JK Productions Ltd. | Health & social care | 2017 |
| Kay-Wi Limited | Professional & scientific | 2014 |
| Kayak Housing Limited | Real estate | 2018 |
| Kaybee (Liverpool) Limited | Wholesale & retail | 2007 |
| Kaybeskeni Ltd | Other services | 2024 |
| Kayces Valeting Ltd | Administrative & support | 2022 |
| Kayci Satchelles Ltd | Wholesale & retail | 2023 |
| Kayess Holdings Limited | Real estate | 2016 |
| Kayiwa Services Limited | Health & social care | 2019 |
| Kayjay Developments Ltd | Real estate | 2025 |
| Kayjay Estates Ltd | Real estate | 2026 |
| Kaypee Consulting Ltd | Professional & scientific | 2025 |
| Kayrock Paving Ltd | Administrative & support | 2022 |
| Kays 3PL Limited | Transport & logistics | 2021 |
| Kays Development Ltd | Construction | 2012 |
| Kays Group Holdings Limited | Financial services | 2024 |
| Kays Medical Limited | Wholesale & retail | 1976 |
| Kaytek Limited | Administrative & support | 2005 |
| Kayvros Ltd | Wholesale & retail | 2021 |
| Kazem Cole Holdings Limited | Financial services | 2025 |
| Kaznext Ltd | Wholesale & retail | 2020 |
| Kazrooni Aigburth Ltd | Hospitality | 2026 |
| KB & Fitness Ltd | Arts & recreation | 2021 |
| KB Electrical Tech Ltd | Construction | 2020 |
| KB Logistic Services Limited | Transport & logistics | 2025 |
| KB Specialist Consulting Ltd | Professional & scientific | 2018 |
| Kb&L Ltd | Transport & logistics | 2025 |
| Kbloomfield Ltd | Professional & scientific | 2024 |
| Kbrook Group Ltd | Wholesale & retail | 2022 |
| KBW Maritime Services Limited | Transport & logistics | 2012 |
| KBW Property Services (NW) Ltd | Other services | 2014 |
| KBY Investments Limited | Real estate | 2011 |
| KC Accountants and Business Advisors Limited | Professional & scientific | 2018 |
| KC Cladding Services Limited | Other services | 2023 |
| KC Decorators NW Limited | Construction | 2024 |
| KC Developments (NW) Ltd | Real estate | 2016 |
| KC Informatics Ltd | Information & communication | 2026 |
| KC Kicks Limited | Wholesale & retail | 2024 |
| KC MMA Ltd | Other services | 2022 |
| KC Plant Limited | Administrative & support | 2018 |
| KC Solutions Services Ltd | Professional & scientific | 2018 |
| KC3 Concrete Equipment Limited | Wholesale & retail | 2021 |
| KC4FITNESS Ltd | Arts & recreation | 2018 |
| KC5 Ltd | Administrative & support | 2016 |
| KCA Management & Lifting Solutions Ltd | Construction | 2025 |
| KCD Auto Techs Limited | Manufacturing | 2017 |
| KCM Murals Limited | Professional & scientific | 2024 |
| KCP Accounting Services Ltd | Professional & scientific | 2022 |
| Kcrr Ltd | Information & communication | 2026 |
| KCS Consultancy Services Ltd | Professional & scientific | 2025 |
| KCS UK & Ireland Limited | Professional & scientific | 2026 |
| KD Beauty Supplies Ltd | Wholesale & retail | 2023 |
| KD Forrester Enterprise Ltd | Wholesale & retail | 2025 |
| KD Housing Services Ltd | Construction | 2023 |
| KD Innovation Consultancy Limited | Education | 2024 |
| KD Invest Ltd | Real estate | 2026 |
| KD Joinery Services Ltd | Construction | 2018 |
| KD Management Services Limited | Professional & scientific | 2010 |