| Kayemes Ltd | Health & social care | 2022 |
| Kaymia Ltd | Real estate | 2020 |
| Kaynaz Limited | Professional & scientific | 2017 |
| Kayon Designs Limited | Professional & scientific | 2015 |
| Kays Coaches Ltd | Transport & logistics | 2026 |
| Kayside Assets Management Ltd | Real estate | 2025 |
| Kaytel Holdings Limited | Administrative & support | 2025 |
| Kaytel Ltd | Health & social care | 2021 |
| Kaytu Solutions Ltd | Information & communication | 2025 |
| Kayvek Contractors Ltd | Construction | 2012 |
| Kayvek Developments Ltd | Construction | 2009 |
| Kayvek Properties Limited | Real estate | 2021 |
| Kayyoss Ltd | Wholesale & retail | 2020 |
| Kazha Limited | Real estate | 2025 |
| Kazi Building Limited | Construction | 2024 |
| Kazi Ventures Limited | Wholesale & retail | 2024 |
| Kaztronics Ltd | Information & communication | 2026 |
| Kaïros Strategies Limited | Professional & scientific | 2020 |
| KB Dental Services Limited | Health & social care | 2016 |
| KB Rigging Ltd | Construction | 2025 |
| KB30PROPERTY Ltd | Real estate | 2026 |
| KBB Lighting Limited | Extraterritorial | 2013 |
| Kbmd Limited | Professional & scientific | 1996 |
| Kbmd Tax Advisory Limited | Professional & scientific | 2024 |
| KBR Developments LDN Ltd | Professional & scientific | 2025 |
| KBR Finance Ltd | Professional & scientific | 2025 |
| KBW Investments Limited | Financial services | 2026 |
| KC Automotive Group Ltd | Wholesale & retail | 2025 |
| KC Blue Limited | Transport & logistics | 2018 |
| KCB Associates Limited | Information & communication | 2015 |
| Kcmc Limited | Professional & scientific | 2012 |
| KCP Consulting Services Ltd | Information & communication | 2013 |
| KCR Estates Limited | Real estate | 2017 |
| Kcreativ Limited | Professional & scientific | 2026 |
| KD Dental Limited | Health & social care | 2013 |
| KD Platforms Ltd | Information & communication | 2025 |
| KD Property Solutions Limited | Real estate | 2024 |
| KD Spines Limited | Health & social care | 2024 |
| Kddion Ltd | Wholesale & retail | 2022 |
| KDJ & Company Limited | Administrative & support | 2013 |
| KDK Office Supplies Ltd | Wholesale & retail | 2012 |
| KDL Accountants and Book-Keepers Limited | Professional & scientific | 2013 |
| KDL Asset Management Ltd | Real estate | 2023 |
| KDN Builders Ltd | Construction | 2026 |
| Kdpk Limited | Construction | 2025 |
| KDS Home Properties Limited | Real estate | 2021 |
| Kdsr Limited | Professional & scientific | 2016 |
| KE Hall Limited | Real estate | 2021 |
| Keaney Estates Ltd | Real estate | 2019 |
| Keani Property's Ltd | Real estate | 2020 |
| Keating Estates (South London) Ltd | Real estate | 2010 |
| Keating Estates Limited | Real estate | 2001 |
| Kebabish Eastcote Ltd | Hospitality | 2023 |
| Kebabish Grill Ltd | Hospitality | 2020 |
| Kebabland (Harrow) Limited | Hospitality | 2005 |
| KEC Total Solution Limited | Wholesale & retail | 2009 |
| Kedley Green Limited | Real estate | 1999 |
| Keefe Construction Ltd | Construction | 2022 |
| Keep Cozy Travel Ltd | Administrative & support | 2023 |
| Keep Fit Fitness Store Ltd | Health & social care | 2024 |
| Keerna Ltd | Wholesale & retail | 2022 |
| Keerthy Ltd | Wholesale & retail | 2026 |
| Kegasoft Limited | Information & communication | 2017 |
| Keirthana Limited | Health & social care | 2024 |
| Keith Bar and Caterers Ltd | Hospitality | 2023 |
| Keki Clearway Ltd | Water & waste | 2019 |
| Keldaire Investments (UK) Limited | Financial services | 2022 |
| Kelleher's Electrical Services Ltd | Construction | 2024 |
| Kelliot Limited | Real estate | 2020 |
| Kelliot Property Services Limited | Real estate | 2014 |
| Kelly AD Consulting Limited | Administrative & support | 2023 |
| Kels Limited | Information & communication | 2008 |
| Kemin Exports London PVT Ltd | Wholesale & retail | 2026 |
| Kemps Deyar Land Ltd | Hospitality | 2026 |
| Kempsford Gardens LLP | | 2020 |
| Kenam Investments Limited | Real estate | 2024 |
| Kenco Group Ltd | Professional & scientific | 2015 |
| Kenco Supplies Ltd | Wholesale & retail | 2020 |
| Kendryna Limited | Administrative & support | 2024 |
| Keni Distributors PVT Limited | Wholesale & retail | 2024 |
| Kenilworth Marketing Limited | Extraterritorial | 2000 |
| Kenlor Court Residents' Association Limited | Real estate | 1976 |
| Kenmid Limited | Wholesale & retail | 2012 |
| Kenmore Construction Limited | Construction | 2012 |
| Kennedy Auto Car Ltd | Wholesale & retail | 2025 |
| Kennedy Auto Center Ltd | Wholesale & retail | 2025 |
| Kennedy Daniel Limited | Wholesale & retail | 2022 |
| Kennedy Group Worldwide Ltd | Wholesale & retail | 2025 |
| Kennedy Town Ltd | Real estate | 2019 |
| Kennedy's Holdings Limited | Wholesale & retail | 2024 |
| Kenneth Green Immigration Services Ltd | Professional & scientific | 2024 |
| Kenneth NG Surgery Ltd. | Health & social care | 2008 |
| Kennford (Barnet) Limited | Real estate | 2025 |
| Kennford Banqueting Limited | Other services | 2021 |
| Kennford Group Limited | Professional & scientific | 2016 |
| Kennford Hotels Limited | Hospitality | 2005 |
| Kennford Ltd | Wholesale & retail | 2003 |
| KENNKELL76 Consultancy Services Limited | Professional & scientific | 2018 |
| Kenrin Limited | Information & communication | 2005 |
| Kenrucky Limited | Information & communication | 2026 |