| Kjsh Limited | Other services | 2018 |
| KK Creative Ltd | Professional & scientific | 2021 |
| KK Golborne Service Ltd | Hospitality | 2024 |
| Kkds Solutions Limited | Administrative & support | 2016 |
| KKP Communications Limited | Administrative & support | 2024 |
| KL Consultancy Services Ltd | Other services | 2019 |
| Klaramed Ltd | Health & social care | 2025 |
| KLB Hairdressing Ltd | Other services | 2019 |
| Kleen-Tex Holdings (UK) Limited | Manufacturing | 1998 |
| Kleen-Tex Industries Limited | Manufacturing | 1999 |
| Klein Consult Limited | Professional & scientific | 1997 |
| Klenzan Direct Limited | Manufacturing | 1990 |
| Klevans Centre of Excellence Limited | Education | 2021 |
| Kleyn Healthcare Limited | Health & social care | 2006 |
| Kleyn Imaging Limited | Health & social care | 2012 |
| Klingman Ventilation Limited | Professional & scientific | 2015 |
| KLM Education Ltd | Education | 2024 |
| KLM NW Limited | Hospitality | 2025 |
| KLN Enterprises Limited | Administrative & support | 2015 |
| Kloud Consulting Group Ltd | Information & communication | 2021 |
| KLOUD9 Ltd | Information & communication | 2018 |
| KLS Law Ltd | Professional & scientific | 2021 |
| KLW Consulting Services Ltd | Information & communication | 2023 |
| KLZ Consultancy Limited | Administrative & support | 2024 |
| KM Building Projects Limited | Real estate | 2016 |
| KM Pure Solutions Ltd | Administrative & support | 2025 |
| KM62 Limited | Administrative & support | 2015 |
| KMB Contract Management Limited | Professional & scientific | 2016 |
| KMB Engineering Solutions Limited | Administrative & support | 2007 |
| KMC Piping Engineering Limited | Professional & scientific | 2017 |
| KMD Engineering Limited | Wholesale & retail | 2013 |
| KMD Trans Ltd | Transport & logistics | 2024 |
| KMG Vital Links Limited | Information & communication | 2024 |
| Kmin Design Limited | Administrative & support | 2007 |
| KML Garden Improvements Ltd | Administrative & support | 2025 |
| KMR Healthcare Consulting Ltd | Health & social care | 2016 |
| KMS786 Ltd | Wholesale & retail | 2022 |
| KMT Financial Consulting Limited | Other services | 2017 |
| Knee Deep Ltd | Construction | 2025 |
| Knekt.Me Limited | Wholesale & retail | 2023 |
| Knergy Services Ltd | Professional & scientific | 2022 |
| Knight Management Consulting Ltd | Professional & scientific | 2018 |
| Knighthawk Solutions Limited | Information & communication | 2020 |
| Knights Corporation Group Limited | Financial services | 2024 |
| Knights Project Management Limited | Professional & scientific | 2021 |
| Knightwood Consultancy Ltd | Professional & scientific | 2026 |
| Knipmeyer-It Ltd | Information & communication | 2018 |
| KNL Leisure Ltd | Hospitality | 2025 |
| Knopp Management Limited | Extraterritorial | 2016 |
| Knotted Treasures Ltd | Manufacturing | 2023 |
| Knownbug Ltd | Professional & scientific | 2026 |
| Knoxbridge Consulting Ltd | Information & communication | 2017 |
| Knutsford Business Payments Limited Partnership | | 2009 |
| Knutsford Business Solutions Ltd | Professional & scientific | 2011 |
| Knutsford Developments Limited | Construction | 2017 |
| Knutsford Royal MAY Day Festival Committee | Arts & recreation | 1996 |
| Koav Group Ltd | Financial services | 2025 |
| Koblan Ltd | Professional & scientific | 2018 |
| Kodc Limited | Administrative & support | 2025 |
| Kodesafe Limited | Information & communication | 2025 |
| KOL Engineering Ltd | Professional & scientific | 2019 |
| Komita Ltd | Transport & logistics | 2021 |
| Koogar Limited | Information & communication | 2009 |
| Kool Freight Limited | Transport & logistics | 2008 |
| Kool Kids OUT of School Ltd | Health & social care | 2018 |
| Koolmove Limited | Information & communication | 2016 |
| Kooner Estates & Properties Limited | Real estate | 2019 |
| Korin Lebov Tutoring Limited | Administrative & support | 2023 |
| Korona Transport Ltd. | Transport & logistics | 2019 |
| Korupoju Consulting Solutions Limited | Administrative & support | 2012 |
| Kosco Interiors Limited | Construction | 2001 |
| Kosy Limited | Information & communication | 2026 |
| Kotsman PVT Ltd | Health & social care | 2013 |
| Kouko Ltd | Wholesale & retail | 2004 |
| Kova Services Ltd | Manufacturing | 2025 |
| Kovacevic Tuition Limited | Education | 2021 |
| Kowhai Limited | Other services | 2017 |
| KOÉ Consulting Ltd | Construction | 2023 |
| KP Competitions Ltd | Wholesale & retail | 2023 |
| KP Controls Ltd | Administrative & support | 2025 |
| KP Engineering (UK) Limited | Administrative & support | 2026 |
| KP Social Care Ltd | Health & social care | 2022 |
| KPC Project Managing Limited | Construction | 2017 |
| KPG Investments Limited | Financial services | 2019 |
| KPG Services Limited | Professional & scientific | 2018 |
| KPH Services Ltd | Transport & logistics | 2024 |
| Kphr Engineering Limited | Administrative & support | 2008 |
| Kppw Ltd | Extraterritorial | 2021 |
| KPS Engineering Ltd | Administrative & support | 2025 |
| KPS Motors Northwest Ltd | Wholesale & retail | 2019 |
| KR Johnson Developments Ltd | Real estate | 2024 |
| KR Lets Ltd | Real estate | 2019 |
| KR Solutions Ltd | Information & communication | 2022 |
| KR Systems Limited | Administrative & support | 2025 |
| KR Ventilation Limited | Construction | 2024 |
| Kraussmaffei Group UK Limited | Manufacturing | 1970 |
| Krazy Kandi Ltd | Wholesale & retail | 2021 |
| KRC Hospitality Limited | Administrative & support | 2018 |
| KRC Quantum Engineering Ltd | Professional & scientific | 2025 |
| Kreatiks Ltd | Real estate | 2022 |