| Klod Recovery Ltd | Transport & logistics | 2023 |
| Klonde Ltd | Manufacturing | 2019 |
| KLS Renovation Ltd | Construction | 2024 |
| Kluchy Kelly UK Ltd | Administrative & support | 2022 |
| KM Painting & Decorating Ltd | Construction | 2025 |
| KM Residential & Surveying Ltd | Real estate | 2025 |
| KM Retailers Ltd | Wholesale & retail | 2023 |
| KMJ Real Estates Ltd | Real estate | 2025 |
| Kmra Holdings Ltd | Professional & scientific | 2018 |
| KMS Property Investments Ltd | Real estate | 2022 |
| KN Construction Ltd | Construction | 2020 |
| KN Healthcare Limited | Health & social care | 2022 |
| Kngs Motor Group Ltd | Wholesale & retail | 2015 |
| KNI Protect Ltd | Construction | 2025 |
| Knife Edge Consultancy Limited | Information & communication | 2007 |
| Knights Catering Ltd | Hospitality | 2025 |
| Knightsbridge Hospitality Services Ltd | Administrative & support | 2025 |
| Knoakley Properties Limited | Real estate | 2025 |
| Knobworks Ltd | Wholesale & retail | 2025 |
| Knock Knock Ltd | Administrative & support | 2018 |
| Knorset Ltd | Wholesale & retail | 2025 |
| Knowbility Consultancy Limited | Information & communication | 2020 |
| Knowledge Key E-Learning Ltd | Education | 2024 |
| Known Pro# Limited | Construction | 2019 |
| KO Crystal UK Ltd | Other services | 2015 |
| Koales Ltd | Information & communication | 2014 |
| Koanna Ltd | Health & social care | 2024 |
| Kobalian Ltd | Wholesale & retail | 2025 |
| Kodda Catering Limited | Wholesale & retail | 2021 |
| Koem Home Ltd | Wholesale & retail | 2025 |
| Koffee in Ltd | Wholesale & retail | 2020 |
| KOI Zone Ltd | Extraterritorial | 2023 |
| Koka Group Ltd | Administrative & support | 2024 |
| Kola Plumbing and Heating Ltd | Construction | 2023 |
| Koli's Builders Ltd | Construction | 2023 |
| KOMMUNIC8 Limited | Professional & scientific | 2007 |
| Kondline Ltd | Construction | 2026 |
| Konflict Records Ltd. | Arts & recreation | 2016 |
| Konnected House Limited | Information & communication | 2025 |
| Konni K'S Romford Limited | Hospitality | 2026 |
| Konohome Ltd | Real estate | 2024 |
| Kontact UK Limited | Extraterritorial | 2008 |
| Kook Consulting Limited | Information & communication | 2015 |
| Koom Estates Ltd | Real estate | 2021 |
| Koom Ltd | Construction | 2018 |
| Koosh Builders Ltd | Construction | 2025 |
| Kopa ORO Ltd | Other services | 2020 |
| Koperkad Limited | Real estate | 2017 |
| Koperkad Management Limited | Real estate | 2019 |
| Korda Developments Limited | Wholesale & retail | 2001 |
| Kore Civils Ltd | Professional & scientific | 2025 |
| Kore Design & Restoration Ltd | Manufacturing | 2018 |
| Koreaone Property UK Ltd | Real estate | 2017 |
| Korsaks Ltd | Wholesale & retail | 2025 |
| Kostapro Ltd | Construction | 2015 |
| Kostar Motorcycles Ltd | Wholesale & retail | 2020 |
| Kota Intelligence Technologies Ltd | Information & communication | 2013 |
| Kota Kinabalu Ltd | Hospitality | 2024 |
| Kotan Barbers Ltd | Other services | 2024 |
| Kotys Limited | Construction | 2024 |
| Koul Academy Limited | Professional & scientific | 2026 |
| Kovacskoncierge Ltd | Wholesale & retail | 2025 |
| Kozzo Limited | Hospitality | 2025 |
| KP Homes & Properties Ltd | Real estate | 2019 |
| Kpbproperty Ltd | Real estate | 2024 |
| KPD Construction Ltd | Construction | 2012 |
| KPK Motors Ltd | Wholesale & retail | 2026 |
| KPS PUB Company Ltd | Hospitality | 2018 |
| KR Facilities Ltd | Administrative & support | 2025 |
| KR Investment Properties Limited | Real estate | 2015 |
| KR Synergy Ltd | Transport & logistics | 2010 |
| KRA Enterprises Ltd | Wholesale & retail | 2024 |
| Krafty Hands Designs Ltd | Wholesale & retail | 2019 |
| Krajah Estates Ltd | Real estate | 2025 |
| Kramco Global Ltd | Manufacturing | 2026 |
| Krasi 3000 Ltd | Construction | 2015 |
| Kratefully Limited | Wholesale & retail | 2022 |
| Kratos Real Estate Limited | Real estate | 2021 |
| Kreatroix PVT Co Ltd | Professional & scientific | 2023 |
| Krescent Ltd | Information & communication | 2012 |
| KRH Project Consulting Ltd | Information & communication | 2023 |
| Kris LEY Ltd | Construction | 2023 |
| Krisaylis Ltd | Arts & recreation | 2019 |
| Krish Arts Ltd | Wholesale & retail | 2021 |
| Krishan G Homes Ltd | Real estate | 2026 |
| Kristofor Builders Ltd | Construction | 2016 |
| KRN Investments Limited | Real estate | 2005 |
| Kroll Ltd | Construction | 2013 |
| Kromeosome Ltd | Extraterritorial | 2025 |
| Kronetail Ltd | Wholesale & retail | 2023 |
| Krown Builders Ltd | Construction | 2016 |
| Krrashi Construction & Design Ltd | Construction | 2024 |
| Krsna Medical Limited | Health & social care | 2016 |
| Krunchi Foods Limited | Wholesale & retail | 2010 |
| KS Civils Ltd | Construction | 2022 |
| KS Property Projects 1 Ltd | Real estate | 2026 |
| KS Property Projects Ltd | Real estate | 2025 |
| KS Trading (UK) Ltd | Wholesale & retail | 2021 |
| Ksbash Ltd | Information & communication | 2023 |
| KSC Accounting Ltd | Professional & scientific | 2020 |