| Khak Autos Ltd | Wholesale & retail | 2025 |
| Khalid Hamid Ltd | Health & social care | 2020 |
| Khalid Riaz 786 Limited | Professional & scientific | 2014 |
| Khan Airport Transfers Ltd | Transport & logistics | 2026 |
| Khan Automation Labs Ltd | Information & communication | 2026 |
| Khan Healthcare Solutions Ltd | Health & social care | 2026 |
| Khan Properties PVT Ltd | Real estate | 2025 |
| Khan Property Consultants Ltd | Construction | 2012 |
| Khanate Living Ltd | Real estate | 2026 |
| Khanexa Limited | Wholesale & retail | 2025 |
| Khangura and Sons Limited | Real estate | 2012 |
| Khasia Ltd | Real estate | 2019 |
| Khayrah Limited | Wholesale & retail | 2023 |
| KHB Holdings Ltd | Professional & scientific | 2015 |
| Khela Healthcare Limited | Health & social care | 2024 |
| KHH Enterprise Ltd | Education | 2025 |
| Khokar Saab Travel Ltd | Transport & logistics | 2025 |
| Khuram Chowdry Limited | Health & social care | 2018 |
| Kick Rocks Limited | Wholesale & retail | 2019 |
| Kick Start Project CIC | Other services | 2021 |
| KID Premiership Limited | Extraterritorial | 2000 |
| Kidroyd Properties Limited | Real estate | 2018 |
| Kids at Heart (Harrogate) Limited | Education | 2015 |
| Kids at Heart Limited | Education | 1993 |
| Kids Camping Store Ltd | Wholesale & retail | 2020 |
| Kids Fashion NW Ltd | Wholesale & retail | 2024 |
| Kids Kingdom Soft Play Limited | Health & social care | 2021 |
| Kids Speech Labs Limited | Information & communication | 2021 |
| Kidz @ Work Limited | Health & social care | 2005 |
| Kieran Douglas Electrical Ltd | Construction | 2009 |
| Kieron Cosgrove & Co Ltd | Construction | 2014 |
| Kika Chiara Limited | Manufacturing | 2015 |
| Kika Home Ltd | Wholesale & retail | 2024 |
| Kilburn Roofing Limited | Financial services | 2023 |
| Kilner & Hutchinson Limited | Manufacturing | 2006 |
| KIM Property Ltd | Real estate | 2026 |
| Kimb Ltd | Administrative & support | 2019 |
| Kimtrain Limited | Professional & scientific | 2019 |
| Kimuro Consulting Ltd | Professional & scientific | 2015 |
| Kindness Promotions Ltd | Education | 2026 |
| Kindreds Creatives CIC | Education | 2021 |
| King James's School | Education | 2012 |
| King Scientific Limited | Wholesale & retail | 2025 |
| Kingdom Properties HD Ltd | Real estate | 2022 |
| Kingdomoflala Ltd | Manufacturing | 2020 |
| Kingfishers Consulting Ltd | Professional & scientific | 2022 |
| Kingsley Brookes Solicitors Limited | Professional & scientific | 2011 |
| Kingsley James Recruitment Partners Limited | Administrative & support | 2023 |
| Kingsman Homes Ltd | Construction | 2009 |
| Kingsman Property Investments Ltd | Real estate | 2024 |
| Kingson Ltd | Construction | 2015 |
| Kingsville Engineering Limited | | 1979 |
| Kingsway Costs Limited | Professional & scientific | 2015 |
| Kinnow Ltd | Wholesale & retail | 2025 |
| Kinrich Ltd | Wholesale & retail | 2020 |
| Kinsgate News Ltd | Wholesale & retail | 2026 |
| Kinsley Burke Retail Ltd | Wholesale & retail | 2026 |
| Kinza One Ltd | Wholesale & retail | 2026 |
| Kirkburton & Highburton Karate Club Ltd | Arts & recreation | 2009 |
| Kirkburton Autocraft Limited | Wholesale & retail | 2008 |
| Kirkburton Construction Company Limited | | 1956 |
| Kirkburton Electrical Holdings Limited | Financial services | 2024 |
| Kirkburton Electrical Limited | Construction | 2018 |
| Kirkburton Garages Limited | Wholesale & retail | 2007 |
| Kirkburton Karate Association | Arts & recreation | 2024 |
| Kirkburton Medical Care Ltd | Health & social care | 2013 |
| Kirkburton Spice Ltd | Hospitality | 2021 |
| Kirkham Search & Selection Limited | Administrative & support | 2020 |
| Kirkheaton Engineering Co.(Dust Control)Limited | Professional & scientific | 1966 |
| Kirkheaton Spice Limited | Hospitality | 2017 |
| Kirkheaton Village Spice Ltd | Hospitality | 2026 |
| Kirkholme Consulting Limited | Professional & scientific | 2002 |
| Kirklees Active Leisure | Education | 2001 |
| Kirklees Active Leisure Trading Limited | Hospitality | 2000 |
| Kirklees and Calderdale Chimney Sweep Services Ltd | Administrative & support | 2023 |
| Kirklees Climate Limited | Other services | 2023 |
| Kirklees Henry Boot Partnership Limited | Administrative & support | 1985 |
| Kirklees Homes Limited | Real estate | 2024 |
| Kirklees in Recovery CIC | Hospitality | 2024 |
| Kirklees Learning and Sport Community Interest Company | Education | 2010 |
| Kirklees Management Ltd | Real estate | 2025 |
| Kirklees Music School | Education | 1992 |
| Kirklees PAT Testing Ltd | Professional & scientific | 2025 |
| Kirklees Pest Control Ltd | Other services | 2010 |
| Kirklees Theatre Trust | Arts & recreation | 1980 |
| Kirklees Youth Theatre Ensemble Ltd | Arts & recreation | 2024 |
| Kirkleesatheart Ltd | Health & social care | 2026 |
| Kirkwood Hospice | Health & social care | 1982 |
| Kirkwood Hospice Enterprises Limited | Wholesale & retail | 2010 |
| KIS Services Limited | Administrative & support | 2025 |
| Kishan Capital Ltd | Households | 2020 |
| Kisk Ltd | Real estate | 2025 |
| KIT Glow International Ltd | Wholesale & retail | 2023 |
| Kitchen 82 Ltd | Hospitality | 2025 |
| Kitchen 85 Ltd | Hospitality | 2023 |
| Kitchen Delights Limited | Wholesale & retail | 2024 |
| KITCHEN84 Limited | Hospitality | 2020 |
| Kitmapper Limited | Administrative & support | 2015 |
| Kitmapper Venture Studio LLP | | 2025 |
| Kitson Limited | Real estate | 2024 |