| Kielty Utilities Ltd | Construction | 2023 |
| Kila Encore Ltd | Real estate | 2025 |
| Kila Estates Ltd | Real estate | 2024 |
| Kilara Limited | Extraterritorial | 2004 |
| Killingback Books Ltd | Administrative & support | 2011 |
| Killingback Limited | Administrative & support | 2006 |
| Kilrenny Properties Limited | Real estate | 2019 |
| Kimbrose Limited | Hospitality | 2004 |
| Kinard Property Limited | Real estate | 2021 |
| Kinder Homes Limited | Construction | 2015 |
| Kinerva Ltd | Manufacturing | 2018 |
| Kineton Croft RTM Company Limited | Households | 2022 |
| Kingfisher (Fish Merchants) Limited | Wholesale & retail | 1998 |
| Kingfisher Meadows Residents Management Company Limited | Households | 2019 |
| Kings Hill Estate Management Company Limited | Real estate | 1992 |
| Kings Hill Property Management Limited | Real estate | 1995 |
| Kings Hill Residential Estate Management Company Limited | Real estate | 1998 |
| Kings Norton Bathrooms Ltd | Construction | 2018 |
| Kings Norton Estates Limited | Real estate | 1994 |
| Kingsai Limited | Information & communication | 2023 |
| Kingsbury Pagination Limited | Administrative & support | 2010 |
| Kingsfield Capital Ltd | Financial services | 2018 |
| Kingsford Medical Services Limited | Health & social care | 2024 |
| Kingsmarque Group Limited | Financial services | 2019 |
| Kingston Views Landscaping Limited | Administrative & support | 2019 |
| Kingstons Butchers LLP | | 2005 |
| Kingswood Coaching & Consulting Ltd | Professional & scientific | 2024 |
| Kingswood Green Energy Ltd | Administrative & support | 2020 |
| Kingswood Ground Works Ltd | Administrative & support | 2016 |
| Kingswood Holdings (West Midlands) Ltd | Financial services | 2024 |
| Kingswood Land Management Company Limited | Real estate | 2013 |
| Kingswood Properties (West Midlands) Limited | Construction | 2012 |
| Kingswood Property Management Ltd | Real estate | 2019 |
| Kinkabu Ltd | Wholesale & retail | 2020 |
| Kinship Consulting Ltd | Professional & scientific | 2024 |
| Kira B Lashes Ltd | Wholesale & retail | 2018 |
| Kirklees Contracts Ltd | Other services | 2007 |
| Kirpai Ltd | Construction | 2021 |
| Kitchen Gallery (Retail) Limited | Wholesale & retail | 2019 |
| Kitchens of Solihull Ltd | Construction | 2021 |
| Kitchology Ltd | Wholesale & retail | 2025 |
| Kite Clinical Services Limited | Education | 2023 |
| Kithawkes Ltd | Information & communication | 2022 |
| Kiva Consulting Ltd | Information & communication | 2011 |
| Kiyani Architecture and Developments Ltd | Construction | 2022 |
| KJ Optical Services Limited | Health & social care | 2014 |
| Kj&Tj Walsh Limited | Professional & scientific | 2009 |
| KJM Passifire Ltd | Construction | 2019 |
| KJS Consultants Ltd | Professional & scientific | 2022 |
| KKP Properties Limited | Real estate | 2022 |
| KKV Retail Ltd | Wholesale & retail | 2026 |
| KL Real Estate UK Limited | Real estate | 2025 |
| Kleend Ltd | Administrative & support | 2026 |
| Klickncart Limited | Wholesale & retail | 2025 |
| Klien Hayes Associates Ltd. | Information & communication | 2013 |
| Klippers Limited | Other services | 2002 |
| Klit Solutions Limited | Information & communication | 2018 |
| KLR Properties Limited | Real estate | 2019 |
| KM Construction Solutions Ltd | Construction | 2020 |
| KM Kayani Limited | Health & social care | 2023 |
| KM Quality Engineering Ltd | Professional & scientific | 2017 |
| Kmac Abodes Limited | Real estate | 2025 |
| Kmac Property Limited | Real estate | 2024 |
| KMD Tax Consulting Ltd | Professional & scientific | 2019 |
| Kmdp Limited | Real estate | 2020 |
| Kmg-Prop Limited | Real estate | 2019 |
| KMN Services Ltd | Professional & scientific | 2022 |
| Knight Carpentry and Building Ltd | Construction | 2022 |
| Knight Erdington Limited | Other services | 2023 |
| Knightcott (Banwell) Limited | Construction | 2023 |
| Knightrate Holdings Ltd | Financial services | 2021 |
| Knightsbridge Online Account Filing Ltd | Administrative & support | 2022 |
| Knightsbridge Training Solutions Ltd | Education | 2013 |
| Knightsbrook Consulting Ltd | Professional & scientific | 2020 |
| Knightsbrook Ltd | Other services | 2022 |
| Knightsford Ltd | Professional & scientific | 2016 |
| Knightsman Limited | Other services | 2017 |
| Knightsvale Ltd | Professional & scientific | 2016 |
| Knoknation Records Ltd | Information & communication | 2025 |
| Knowcode Solutions Ltd | Professional & scientific | 2024 |
| Knowle & Dorridge Cricket Club Limited | Arts & recreation | 2015 |
| Knowle (2000) Limited | Real estate | 2016 |
| Knowle Church of England Primary Academy | Education | 2013 |
| Knowle Management Company Hampton Road Limited | Households | 2015 |
| Knowle Packaging Ltd | Manufacturing | 2009 |
| Knowle Sweet Shop Ltd | Wholesale & retail | 2026 |
| Knowle Travel Limited | Administrative & support | 2001 |
| Knowle Vision Ltd | Health & social care | 2025 |
| Knowle Wood Gate Management Company Limited | Households | 2006 |
| Knowlton Green Limited | Real estate | 2021 |
| KNS Holdings Limited | Real estate | 2022 |
| Ko-Lock Ltd | Manufacturing | 2020 |
| Kober Digital Limited | Information & communication | 2018 |
| Kodi Limited | Information & communication | 2022 |
| Kofukuna Ltd | Wholesale & retail | 2025 |
| Komorebi Solutions Limited | Information & communication | 2016 |
| Konaland Limited | Real estate | 2006 |
| Konciso Ltd | Wholesale & retail | 2024 |
| Kong Brickworks Limited | Construction | 2023 |
| Kong Holdings Limited | Real estate | 2023 |