| Keeping Clean Ltd | Administrative & support | 2022 |
| Keepingyourpromises Limited | Transport & logistics | 2019 |
| KEG007 Ltd | Real estate | 2022 |
| KEG02 Limited | Real estate | 2021 |
| KEG04 Limited | Administrative & support | 2021 |
| Kehoe's ALE Museum Limited | Hospitality | 1994 |
| Keighley Continental Limited | Wholesale & retail | 2025 |
| Keighley Key Builders Limited | Extraterritorial | 1979 |
| Keighley's Mechanical Services Ltd | Construction | 2020 |
| Keir Lock Childrens Homes Ltd | Health & social care | 2013 |
| Keith James Limited | Wholesale & retail | 2005 |
| Keith Taylor Design Ltd | Wholesale & retail | 2018 |
| Keith’S Pharmacy Limited | Health & social care | 2016 |
| Kelan Swales Ltd | Hospitality | 2023 |
| Kelburn Recruitment Limited | Administrative & support | 2009 |
| Keldholme Residents Association Limited | Households | 1993 |
| Keldo Investments Limited | Real estate | 2022 |
| Keleab Delivery Limited | Transport & logistics | 2025 |
| Kelekona Solutions Ltd | Information & communication | 2023 |
| Kelema Limited | Financial services | 2002 |
| Keles Wetherby Limited | Hospitality | 2019 |
| Kelevra Risk Management Limited | Administrative & support | 2019 |
| Kelfix Ltd | Construction | 2025 |
| Kelham Central Ltd | Real estate | 2014 |
| Kelham Fire Protection Ltd | Manufacturing | 2010 |
| Kelho Rapid Ltd | Transport & logistics | 2026 |
| Kellegher Developments Limited | Construction | 2023 |
| Kellete Market Limited | Wholesale & retail | 2026 |
| Kelly & Barratt Holdings Limited | Professional & scientific | 2010 |
| Kelly & Barratt Limited | Manufacturing | 1964 |
| Kelly Burnett Counselling Limited | Health & social care | 2020 |
| Kelly Events Ltd | Professional & scientific | 2026 |
| Kelly Ivory Limited | Hospitality | 2015 |
| Kelly Kiara Limited | Information & communication | 2016 |
| Kelly Marketing Ltd | Administrative & support | 2019 |
| Kelly Pearson Media Ltd | Information & communication | 2026 |
| Kelly Technology Ltd | Information & communication | 2022 |
| Kellyhaircare Ltd | Other services | 2015 |
| Kellyseye Club Supplies Ltd | Manufacturing | 2018 |
| Kelpar Properties Limited | Real estate | 2026 |
| Kelso Investments Limited | Administrative & support | 2014 |
| Kelton Associates Limited | Real estate | 2016 |
| Kelvinair Maintenance Services Ltd | Construction | 1999 |
| Kemada Limited | Construction | 2008 |
| Kemada Project & Contract Services Ltd | Construction | 2012 |
| Kemetic Limited | Manufacturing | 2015 |
| Kemja Limited | Information & communication | 2026 |
| Kemluvx Properties Limited | Administrative & support | 2025 |
| Kemp Cottages Limited | Real estate | 2024 |
| Kempadoo Millinery Limited | Wholesale & retail | 2010 |
| Kemps Architectural Lighting Ltd | Manufacturing | 2002 |
| Kempster Consulting Ltd | Administrative & support | 2016 |
| Kemsia Ltd | Financial services | 2023 |
| Kemz Groups Ltd | Other services | 2025 |
| KEN Gibson FM Group Ltd | Construction | 2025 |
| KEN Patterson Process Safety Limited | Professional & scientific | 2017 |
| KEN Plant Ltd | Administrative & support | 2019 |
| KEN the Translator Ltd | Professional & scientific | 2022 |
| Kena Properties Ltd | Real estate | 2023 |
| Kendalbank (Flat Management) Limited | Households | 1981 |
| Kendall Brothers Roofing Limited | Construction | 2026 |
| Kendall Contractors Ltd | Construction | 2018 |
| Kendall Technical Services Ltd | Professional & scientific | 2026 |
| Kendells Bistro Ltd | Hospitality | 2007 |
| Keneto Ltd | Wholesale & retail | 2025 |
| Kengate Holdings Limited | Financial services | 2010 |
| Keni Civil Engineering Ltd | Construction | 2025 |
| Keni-Next Healthcare Ltd | Health & social care | 2025 |
| Keniva Properties Ltd | Real estate | 2026 |
| Kenjiro Trading Ltd | Wholesale & retail | 2020 |
| Kenmian Limited | Wholesale & retail | 2017 |
| Kennedy FOX Associates Ltd | Administrative & support | 2019 |
| Kennedy Holdings Limited | Real estate | 2015 |
| Kennell Consultants Ltd. | Information & communication | 2007 |
| Kennet Lahti Optical Glazing Limited | Health & social care | 2006 |
| Kenniemias Ltd | Health & social care | 2019 |
| Kennores Healthcare Recruitment Limited | Administrative & support | 2014 |
| Kennores Properties Ltd | Real estate | 2022 |
| Kennores Trading Ltd | Wholesale & retail | 2019 |
| Kenny & Company Engineering Ltd | Other services | 2020 |
| Kenny Brothers (Civil Engineering) Limited | Construction | 1978 |
| Kenny-Clark Limited | Wholesale & retail | 2023 |
| Kenrui Ltd | Real estate | 2023 |
| Kenshin Events Ltd | Administrative & support | 2025 |
| Kenshin Ltd | Arts & recreation | 2020 |
| Kensington Alpha Investments Limited | Real estate | 2017 |
| Kensington Gardens Square Property Limited | Real estate | 2023 |
| Kensington Property Holdings Limited | Construction | 2017 |
| Kent & Bird Ltd | Manufacturing | 2022 |
| Kent and East Sussex Weald Hospital Holdings Limited | Financial services | 2007 |
| Kent and East Sussex Weald Hospital Limited | Administrative & support | 2007 |
| Kent Capital Ltd | Financial services | 2011 |
| Kent Foodservice Limited | Wholesale & retail | 2009 |
| Kent Road Management Company Limited | Real estate | 2000 |
| Kent Wood Court Management Company Limited | Households | 1988 |
| Kentaro Ltd | Financial services | 2024 |
| Kentaro Real Estate Ltd | Real estate | 2026 |
| Kentavruch Ltd | Construction | 2026 |
| Kentmere 1972 Limited | Extraterritorial | 2014 |
| Kentransport Ltd | Transport & logistics | 2026 |