| Krapht Ltd | Professional & scientific | 2023 |
| Krashed Limited | Wholesale & retail | 2019 |
| KRD Properties Ltd | Real estate | 2023 |
| Kremer Properties Limited | Real estate | 2014 |
| Kringle Danish Bakery Limited | Wholesale & retail | 2022 |
| Krio Limited | Construction | 2020 |
| Kris Heald Contractor Limited | Construction | 2016 |
| Krisfix Ltd | Wholesale & retail | 2021 |
| Krisfix MOT Testing Centre Ltd | Wholesale & retail | 2022 |
| Krish Holdings Ltd | Real estate | 2018 |
| Krish Ventures (GBR) Ltd. | Real estate | 2014 |
| Krishu Limited | Health & social care | 2018 |
| Krispy KOD UK Ltd | Hospitality | 2018 |
| Kristi ALB Ltd | Hospitality | 2018 |
| Kristian Sarissky Limited | Transport & logistics | 2025 |
| Kristysales Ltd | Wholesale & retail | 2025 |
| Kriti Creatives Limited | Arts & recreation | 2026 |
| Krjh Limited | Professional & scientific | 2012 |
| KRO Consulting Limited | Professional & scientific | 2015 |
| Kroma Hair & Beauty Studio Limited | Other services | 2024 |
| Krome Collective Ltd | Wholesale & retail | 2024 |
| Krown Boutique Limited | Wholesale & retail | 2020 |
| KRS Education and Wellbeing Ltd | Arts & recreation | 2021 |
| KRS Education Ltd | Education | 2021 |
| Kruk’S Properties Ltd | Real estate | 2024 |
| Kruuse UK Limited | Professional & scientific | 1990 |
| Krydda Ltd | Hospitality | 2019 |
| Krynkl Limited | Construction | 2015 |
| Kryoshift Ltd | Manufacturing | 2024 |
| Kryptic Media Limited | Information & communication | 2016 |
| Krysa Ltd | Transport & logistics | 2025 |
| Krystal Kleen Detail Limited | Households | 2015 |
| KS & N Properties Limited | Real estate | 2019 |
| KS Car Sales Limited | Wholesale & retail | 2025 |
| KS Catering Services Ltd | Hospitality | 2021 |
| KS Cellar Ltd | Wholesale & retail | 2021 |
| KS Express Way Limited | Wholesale & retail | 2023 |
| KS Go Taste Ltd | Hospitality | 2022 |
| KS Investment Holding Limited | Real estate | 2025 |
| KS Orthodontic Specialist Services Ltd | Health & social care | 2025 |
| KS Real Estate Investments Ltd | Professional & scientific | 2025 |
| KS Sales and Repairs Ltd | Wholesale & retail | 2026 |
| KS Welcome Ltd | Wholesale & retail | 2025 |
| Ks&Go Cellar Ltd | Wholesale & retail | 2023 |
| KSA Estates Limited | Real estate | 2026 |
| KSA786 Ltd | Real estate | 2016 |
| KSB Courier Limited | Transport & logistics | 2023 |
| KSL Construction Services Ltd | Construction | 2012 |
| KSM Services Limited | Health & social care | 2016 |
| Kspace the Point Limited | Real estate | 2018 |
| Kspp Property Limited | Real estate | 2021 |
| Kssa Properties Ltd | Real estate | 2016 |
| KST Trade Ltd | Wholesale & retail | 2018 |
| KT Hygiene Therapy Limited | Health & social care | 2025 |
| KT Records Limited | Information & communication | 2018 |
| Kt-Sons Continuum Limited | Transport & logistics | 2026 |
| KTD Consulting Limited | Professional & scientific | 2008 |
| Ktea Limited | Wholesale & retail | 2026 |
| KTL02 Property Ltd | Real estate | 2023 |
| KTS Family Food Limited | Hospitality | 2025 |
| KTS Plumbing & Heating Ltd | Construction | 2016 |
| Kube Construction & Development Ltd | Construction | 2018 |
| Kube Electrical Contractors Ltd | Construction | 2026 |
| Kube Estates UK Ltd | Real estate | 2022 |
| Kube-Vip Limited | Information & communication | 2022 |
| Kudaphilo Ltd | Health & social care | 2023 |
| Kudos Creative (UK) Ltd | Professional & scientific | 2010 |
| Kudzie & Sons Couriers Limited | Transport & logistics | 2024 |
| Kuelm Limited | Health & social care | 2023 |
| Kuke Enterprise Limited | Construction | 2025 |
| Kulars Limited | Hospitality | 2024 |
| Kuleab Ltd | Wholesale & retail | 2022 |
| Kulture Coffee Ltd | Manufacturing | 2020 |
| Kulug Ltd | Hospitality | 2018 |
| Kuma Stationery Crafts Limited | Wholesale & retail | 2022 |
| Kumah Private Ltd | Health & social care | 2018 |
| Kumla Music Limited | Information & communication | 2019 |
| Kumusha/ Ekhaya Logistics Ltd | Transport & logistics | 2025 |
| Kunafa KNG Ltd | Hospitality | 2024 |
| Kura Living Ltd | Manufacturing | 2021 |
| Kurdish Food Ltd | Hospitality | 2025 |
| Kurdish Limited | Hospitality | 2024 |
| Kurdishlinkup Ltd | Information & communication | 2026 |
| Kurdistan 12 Limited | Hospitality | 2025 |
| Kurious Film-Funding Syndicate Limited | Professional & scientific | 2023 |
| Kurly Bird Events Limited | Other services | 2008 |
| Kurtman Manning & Kaye Co. Limited | Professional & scientific | 2011 |
| Kuso Global Solution Limited | Transport & logistics | 2025 |
| Kutchenhaus Sheffield Limited | Wholesale & retail | 2022 |
| Kutefoods Ltd | Hospitality | 2024 |
| Kutrite Studios Ltd | Arts & recreation | 2019 |
| Kutrite Works Ltd | Real estate | 2018 |
| Kuts & Care Ltd | Other services | 2026 |
| Kuusakoski Limited | Wholesale & retail | 2006 |
| Kuvo Collective Ltd | Hospitality | 2025 |
| Kuza Ltd | Health & social care | 2021 |
| Kuzo Data Limited | Information & communication | 2011 |
| KV Kitchens Ltd | Administrative & support | 2017 |
| Kvsk Ltd | Hospitality | 2026 |
| KW Cannock Properties Ltd | Extraterritorial | 2006 |