| KM Hospitality Ltd | Hospitality | 2023 |
| KM Ready Ready Seasonings Ltd | Manufacturing | 2018 |
| Kmac Automotive Ltd | Wholesale & retail | 2021 |
| KMB Engineering Consultants Ltd | Professional & scientific | 2025 |
| KMD84 Investments Limited | Real estate | 2022 |
| KMS Group Limited | Financial services | 2020 |
| KMS Roofing East Limited | Construction | 2022 |
| KMS Scaffolding Limited | Construction | 2014 |
| KMS Scaffolding Sales Limited | Wholesale & retail | 2025 |
| KNB Agro Industries Ltd | Wholesale & retail | 2026 |
| Knectmaster Limited | Information & communication | 2016 |
| Knife Grill Ltd | Hospitality | 2026 |
| Knight & Daye Ltd | Administrative & support | 2022 |
| Knight Residential Investments Ltd | Real estate | 2026 |
| Knights Retail Ltd | Wholesale & retail | 2015 |
| Knightsbridge Solutions (UK) Group Limited | Administrative & support | 2024 |
| Knoku Consultancy Ltd | Information & communication | 2023 |
| Knotweed Treatments Limited | Water & waste | 2019 |
| Knowle Luxury Beauty & Nails Ltd | Other services | 2026 |
| KNT Capital Ltd | Financial services | 2026 |
| Koala Cleans Ltd | Administrative & support | 2024 |
| Koala Slings Limited | Manufacturing | 2017 |
| Koamijoy Limited | Information & communication | 2023 |
| Kocalar Group Ltd | Wholesale & retail | 2026 |
| Koettermann UK Ltd | Manufacturing | 2021 |
| Kohla Ltd | Real estate | 2026 |
| Komfort Healthcare Limited | Health & social care | 2023 |
| Komipath Services Limited | Health & social care | 2025 |
| Komkovart Limited | Professional & scientific | 2023 |
| Konrad Labs Limited | Wholesale & retail | 2025 |
| Kooky DEV Ltd | Information & communication | 2025 |
| Kool Info Ltd | Information & communication | 1992 |
| Koring Home Ltd | Wholesale & retail | 2023 |
| Kortex LAB Ltd | Information & communication | 2026 |
| Koss Consulting Ltd | Information & communication | 2025 |
| Kost Hotels Ltd | Hospitality | 2006 |
| Kotch Properties Ltd | Real estate | 2025 |
| Kotei Publishing Ltd | Information & communication | 2016 |
| Kotikon Property Investments Limited | Real estate | 2025 |
| Koulen & Partners Ltd | Professional & scientific | 2025 |
| Kova Exclusive Ltd | Wholesale & retail | 2026 |
| KP Installations Ltd | Information & communication | 2021 |
| KP Surgery Ltd | Health & social care | 2023 |
| Kpac Holdings Ltd | Wholesale & retail | 2020 |
| Kpdh Holdings Ltd | Financial services | 2026 |
| Kpsk Accounts & Tax Limited | Professional & scientific | 2002 |
| Kpsk Consulting Limited | Extraterritorial | 2011 |
| Kpsk Wealth Management Limited | Professional & scientific | 2017 |
| Kqkemi Ltd | Wholesale & retail | 2025 |
| KR TM Ltd | Construction | 2023 |
| Krades Ltd | Wholesale & retail | 2024 |
| Kraft Coatings Ltd | Administrative & support | 2023 |
| Kraft Sales UK Ltd | Wholesale & retail | 2024 |
| Krakar Limited | Administrative & support | 2011 |
| Krane Ltd | Construction | 2024 |
| Krave Ltd | Professional & scientific | 2021 |
| Krave Pure Ltd | Wholesale & retail | 2021 |
| Kreativ Kinetics Ltd | Administrative & support | 2016 |
| Kreatorhood Ltd | Information & communication | 2021 |
| Krior Labs Ltd | Information & communication | 2025 |
| Kriselle Elegance (UK) Limited | Other services | 2025 |
| Krol Ventures Ltd | Wholesale & retail | 2016 |
| Kroz Collection Ltd. | Wholesale & retail | 2015 |
| KS Coaching & Consulting Limited | Professional & scientific | 2019 |
| KS Wahid Ltd | Wholesale & retail | 2026 |
| KSB Maintenance Limited | Other services | 2020 |
| KSD Global Limited | Extraterritorial | 2017 |
| KSR Business Solutions Ltd | Administrative & support | 2010 |
| KSW Advocacy Solutions Ltd | Other services | 2025 |
| KT Development Group Ltd | Construction | 2020 |
| KT International Trading Ltd | Wholesale & retail | 2022 |
| KT Rental Property Limited | Real estate | 2024 |
| KT T/A the Cutting Edge Ltd | Other services | 2025 |
| Kuai Properties Ltd | Real estate | 2024 |
| Kuhu Ltd | Other services | 2026 |
| Kuiwee Ltd | Wholesale & retail | 2023 |
| Kukaj Services Ltd | Other services | 2018 |
| Kum-Faya-Kum Ltd | Manufacturing | 2025 |
| Kumeso Empire Ltd | Other services | 2023 |
| Kung FU Essex Ltd | Education | 2021 |
| Kunjrad Ltd | Health & social care | 2025 |
| Kunlepaints Ltd | Arts & recreation | 2022 |
| Kupiec-Ashton Consulting Ltd | Administrative & support | 2024 |
| Kurt Cross Limited | Wholesale & retail | 2018 |
| Kurt Jones Media Ltd | Information & communication | 2025 |
| Kurt Jones Systems Ltd | Information & communication | 2025 |
| Kusa Kouture Limited | Wholesale & retail | 2025 |
| Kusama Consulting Ltd. | Financial services | 2023 |
| Kusama Ltd. | Administrative & support | 2023 |
| Kusunoki Global Ltd | Administrative & support | 2024 |
| Kuucleans Limited | Administrative & support | 2025 |
| Kuufintech Limited | Information & communication | 2025 |
| Kuzie Ltd | Other services | 2023 |
| KV Chicken Holdings Limited | Financial services | 2026 |
| KV Opco Ltd | Hospitality | 2020 |
| KV Pop-Ups Ltd | Hospitality | 2022 |
| Kwezi Limited | Wholesale & retail | 2022 |
| KWJ FFF Coaching LLP | | 2025 |
| KWL Consulting Services Limited | Information & communication | 2025 |
| Kybundles Ltd | Wholesale & retail | 2024 |