| KPN Clinical Consultancy Ltd | Information & communication | 2025 |
| KPR Properties Ltd | Real estate | 2016 |
| Kptechno Ltd | Wholesale & retail | 2023 |
| KQ Recovery Ltd | Transport & logistics | 2025 |
| KR Asset Holdings Ltd | Financial services | 2024 |
| KR Consult Ltd | Information & communication | 2018 |
| KR Hair Limited | Other services | 2015 |
| KR Properties and Management Ltd | Real estate | 2025 |
| KR Property Places Ltd | Real estate | 2024 |
| KR Sign Design Limited | Other services | 2018 |
| KR10 Ltd | Transport & logistics | 2015 |
| Krae Limited | Financial services | 2015 |
| Krafthaus Arts CIC | Arts & recreation | 2015 |
| Kraken Contracts Ltd | Wholesale & retail | 2016 |
| Krakers Ltd | Wholesale & retail | 2026 |
| Krakow Doncaster Ltd | Wholesale & retail | 2020 |
| Kransley Consultancy Ltd | Information & communication | 2012 |
| Kras Collective Ltd | Information & communication | 2020 |
| Krave Kandy Ltd | Wholesale & retail | 2024 |
| Krave Kitchen Ltd | Manufacturing | 2024 |
| Krave Kitchen to Go Ltd | Manufacturing | 2025 |
| Kraymax Developments Limited | Construction | 2021 |
| Kraytos Property & Facilities Management Ltd | Administrative & support | 2014 |
| KRD MED Limited | Health & social care | 2023 |
| KRE Developments Limited | Construction | 2019 |
| KRE Properties 2 Limited | Households | 2021 |
| KRE Properties Ltd | Households | 2016 |
| Kreate Hair Design Limited | Other services | 2016 |
| Kreativ Solutions Limited | Manufacturing | 2024 |
| Kreative Bakes Limited | Hospitality | 2020 |
| Krfisheries Ltd | Hospitality | 2021 |
| Kria Park Ltd | Financial services | 2018 |
| Kriam Ltd | Financial services | 2026 |
| Krian Properties Ltd | Real estate | 2022 |
| Krigdean Ltd | Real estate | 2025 |
| Kriluck Marketing Ltd | Manufacturing | 2020 |
| Kris Beuret Limited | Administrative & support | 1998 |
| Kris Carers Limited | Health & social care | 2008 |
| Kris Johnson Plastering & Building Limited | Construction | 2017 |
| Kris Nursing & Residential Care Home Ltd | Health & social care | 2024 |
| Krish Fashion Jewellery Ltd | Wholesale & retail | 2024 |
| Krish Property's Leicester Limited | Information & communication | 2016 |
| Krish Retails Leicester Ltd | Wholesale & retail | 2023 |
| Krisha Enterprise Ltd | Transport & logistics | 2017 |
| Krishiv Enterprise Ltd | Wholesale & retail | 2025 |
| Krishiv Food Basket Ltd | Wholesale & retail | 2024 |
| Krishivay Limited | Wholesale & retail | 2021 |
| Krishna & MV Ltd | Wholesale & retail | 2026 |
| Krishna & Tulsi PVT Ltd | Health & social care | 2018 |
| Krishna General Trade Ltd | Wholesale & retail | 2019 |
| Krishna Gifts Ltd | Administrative & support | 2017 |
| Krishna Jewellers Leicester Limited | Wholesale & retail | 2023 |
| Krishna Masri Ltd | Financial services | 2017 |
| KRISHNA8 Ltd | Wholesale & retail | 2024 |
| Krishnan Subramanian Ltd | Health & social care | 2016 |
| Krishyam Clothing Ltd | Manufacturing | 2019 |
| Krisi & Jimit Investments Ltd | Real estate | 2025 |
| Krisman (General Trading) Limited | Wholesale & retail | 1978 |
| Krisona Properties Limited | Real estate | 2020 |
| Krispylane Chicken & Grill Ltd | Hospitality | 2026 |
| Kristine Kolodziejski Motorsport Limited | Arts & recreation | 2025 |
| Kristuls Cleaning Services Ltd | Households | 2016 |
| Kristy J Green Ltd | Wholesale & retail | 2018 |
| Kritika Ltd | Wholesale & retail | 2021 |
| Kriva Limited | Real estate | 2024 |
| Krivam Ltd | Wholesale & retail | 2019 |
| Kriyansh Accountancy Ltd | Professional & scientific | 2024 |
| Krjp Limited | Wholesale & retail | 2026 |
| Krkotai Limited | Construction | 2025 |
| KRL Assets Holding Limited | Wholesale & retail | 2026 |
| KRL Technology Limited | Information & communication | 2024 |
| KRM Solutions Ltd | Transport & logistics | 2025 |
| KRN Estates & Lettings Ltd | Real estate | 2023 |
| KRN Trading Ltd | Real estate | 2022 |
| Kros International Ltd | Administrative & support | 2017 |
| Kross Investments Limited | Health & social care | 2012 |
| Kross Properties Limited | Real estate | 2012 |
| KRP Courier Limited | Transport & logistics | 2020 |
| KRS Logistics Ltd | Transport & logistics | 2025 |
| KRS Real Estate Ltd | Real estate | 2021 |
| Krs&D Consultancy Limited | Professional & scientific | 2013 |
| Krw-Cristrans Ltd | Wholesale & retail | 2016 |
| Krystal Event Services Ltd | Administrative & support | 2011 |
| Krystal Medics Ltd | Health & social care | 2024 |
| Krystal Plus Care Limited | Health & social care | 2016 |
| Krystal Travel Technology Ltd | Administrative & support | 2025 |
| Krystals Plus Transport Ltd | Transport & logistics | 2014 |
| Krzemi Limited | Transport & logistics | 2017 |
| Krzysztof K Trans Services Ltd | Wholesale & retail | 2019 |
| Krzysztof Lorenc Ltd | Transport & logistics | 2013 |
| KS & ANJ Investments Ltd | Real estate | 2024 |
| KS Auto Leicester Ltd | Wholesale & retail | 2025 |
| KS Excellence Ltd | Wholesale & retail | 2012 |
| KS Locum Services Ltd | Health & social care | 2023 |
| KS Luxury Bedding Ltd | Wholesale & retail | 2024 |
| KS Prime Properties Ltd | Real estate | 2026 |
| KS Sofa & Dining Ltd | Wholesale & retail | 2024 |
| KS3 Properties Ltd | Real estate | 2021 |
| KS3 Solutions Ltd | Professional & scientific | 2022 |
| KSA Financial Ltd | Financial services | 2015 |