| Kashif Bilal Limited | Real estate | 2023 |
| Kashif Sajjad Ltd | Wholesale & retail | 2025 |
| Kashmir Airways Ltd | Transport & logistics | 2024 |
| Kashmir Bakery Ltd | Extraterritorial | 2013 |
| Kashmir Builders & Plumbers Ltd | Construction | 2026 |
| Kashmir Catering Bradford Limited | Hospitality | 2018 |
| Kashmir Crown Bakers Limited | Extraterritorial | 2013 |
| Kashmir Crown Bakery Limited | Extraterritorial | 2000 |
| Kashmir Crown Baking Company Limited | Extraterritorial | 2002 |
| Kashmir Foods (Bradford) Ltd | Other services | 2018 |
| Kashmiri Aroma (Wakefield) LLP | | 2011 |
| Kashmiri Holdings Ltd | Real estate | 2024 |
| Kashmiri Pizzas Ltd | Hospitality | 2023 |
| Kashmirs Crown Bakery Limited | Manufacturing | 2021 |
| Kasim Ltd | Transport & logistics | 2026 |
| Kask Estates Limited | Professional & scientific | 2020 |
| Kasper Prime Ltd | Other services | 2020 |
| Kasvi Bullion 999.9 Ltd | Wholesale & retail | 2024 |
| Kasym World Ltd | Wholesale & retail | 2025 |
| KAT Rose-Martin Limited | Arts & recreation | 2022 |
| Katchunga Property Solutions Ltd | Real estate | 2026 |
| Kate Holden Clinic Ltd | Wholesale & retail | 2015 |
| Katie Wells Productions Limited | Other services | 2020 |
| Katsi's Crafty Things Ltd | Wholesale & retail | 2024 |
| Kaufuland Express Ltd | Wholesale & retail | 2020 |
| KAV Property Investment Ltd | Extraterritorial | 2025 |
| Kay's Property's Ltd | Real estate | 2023 |
| Kayaani Ltd | Real estate | 2019 |
| Kaydel Synergy Ltd | Health & social care | 2025 |
| Kaye Marie Creative Ltd | Information & communication | 2026 |
| Kaysons Group Limited | Hospitality | 2024 |
| Kay’S Little Cubs Ltd | Health & social care | 2025 |
| Kazmi UK Consulting Ltd | Financial services | 2015 |
| Kazumms Enterprise Limited | Wholesale & retail | 2025 |
| Kazy Embroidery Ltd | Manufacturing | 2026 |
| KB Code Limited | Information & communication | 2020 |
| KB Enterprises (UK) Limited | Administrative & support | 2014 |
| KB Optometry Ltd | Health & social care | 2026 |
| KB Real Estate UK Limited | Real estate | 2002 |
| KBA Taxi Hire Limited | Transport & logistics | 2024 |
| KBG Plumbing & Heating Limited | Construction | 2017 |
| KBS Autos Yorkshire Ltd | Wholesale & retail | 2024 |
| KBS Facades Ltd | Public administration | 2026 |
| KBT Health Ltd | Health & social care | 2019 |
| KC Baking Ltd | Manufacturing | 2023 |
| KC Barnsley Ltd | Real estate | 2026 |
| KC Electrical (Yorkshire) Ltd | Construction | 2013 |
| KC Nett Ltd | Manufacturing | 2025 |
| KCB Bakers Ltd | Manufacturing | 2023 |
| KCB Bakery Ltd | Manufacturing | 2023 |
| KCB Properties Limited | Extraterritorial | 2016 |
| KCM Distributions Ltd | Wholesale & retail | 2026 |
| Kcmk Limited | Administrative & support | 2026 |
| KD Consultancy Ltd | Professional & scientific | 2022 |
| KD Holdings Group Limited | Manufacturing | 2019 |
| Kddw Limited | Real estate | 2025 |
| Kdmd Properties Ltd | Real estate | 2024 |
| Kdmd Ventures Ltd | Wholesale & retail | 2022 |
| Kdsm Services Ltd | Administrative & support | 2019 |
| KDZ Investment Ltd | Real estate | 2024 |
| KDZ Motors Ltd | Wholesale & retail | 2025 |
| Ke-Assured Limited | Professional & scientific | 2020 |
| Kearby Homes Limited | Construction | 2025 |
| Kearns Group Ltd | Hospitality | 2024 |
| Kearns Industries Ltd | Hospitality | 2025 |
| Keates ENT Ltd | Construction | 2022 |
| Kebab HUT BFD Ltd | Hospitality | 2023 |
| Kebab Xperts Ltd | Manufacturing | 2022 |
| Kebabeesh Limited | Hospitality | 2020 |
| Kebabism Limited | Hospitality | 2020 |
| Kebfort Healthcare Services Limited | Health & social care | 2024 |
| Keelham Explorers Ltd | Health & social care | 2025 |
| Keeling Business & IT Services Limited | Information & communication | 2014 |
| Keen Services Limited | Administrative & support | 2024 |
| Keenan's Kitchen Limited | Hospitality | 2025 |
| Keep Growing Marketing Ltd | Professional & scientific | 2025 |
| Keep IT Simple Property Solutions Ltd | Real estate | 2022 |
| Keep Warm Limited | Administrative & support | 2010 |
| Keepers Fold Management Company Limited | Households | 2006 |
| Kefbarn Ltd | Wholesale & retail | 2026 |
| Kegspertise Logistics Limited | Transport & logistics | 2014 |
| Keighley and District Model Engineering Society Limited | Other services | 1982 |
| Keighley Skip Hire Ltd | Water & waste | 2020 |
| Keikos World Ltd | Wholesale & retail | 2023 |
| Keita Ltd | Construction | 2021 |
| Keith Flaherty Ltd | Construction | 2021 |
| Kelda Eurobond Co Limited | Financial services | 2007 |
| Kelda Finance (NO.1) Limited | Professional & scientific | 2012 |
| Kelda Finance (NO.2) Limited | Professional & scientific | 2012 |
| Kelda Finance (NO.3) PLC | Extraterritorial | 2012 |
| Kelda Group Limited | Financial services | 1989 |
| Kelda Group Pension Trustees Limited | Financial services | 1997 |
| Kelda Limited | Extraterritorial | 1987 |
| Kelda Transport Management Limited | Transport & logistics | 2016 |
| Kelda Water Services (Projects) Limited | Professional & scientific | 2008 |
| Kelda Water Services Limited | Administrative & support | 1987 |
| Kelectrix M&E Ltd. | Construction | 2025 |
| Keletrics Limited | Wholesale & retail | 2025 |
| Kelham Central Utilities Ltd | Energy | 2021 |
| Kelly's Idleway PH Limited | Transport & logistics | 2024 |